JP3117396B2 - Equipment for removing nitrogen and phosphorus from wastewater - Google Patents
Equipment for removing nitrogen and phosphorus from wastewaterInfo
- Publication number
- JP3117396B2 JP3117396B2 JP07344795A JP34479595A JP3117396B2 JP 3117396 B2 JP3117396 B2 JP 3117396B2 JP 07344795 A JP07344795 A JP 07344795A JP 34479595 A JP34479595 A JP 34479595A JP 3117396 B2 JP3117396 B2 JP 3117396B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- ions
- water
- treated water
- wastewater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims description 71
- 239000002351 wastewater Substances 0.000 title claims description 47
- 229910052757 nitrogen Inorganic materials 0.000 title claims description 33
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims description 27
- 229910052698 phosphorus Inorganic materials 0.000 title claims description 27
- 239000011574 phosphorus Substances 0.000 title claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 108
- 238000003466 welding Methods 0.000 claims description 33
- 239000003463 adsorbent Substances 0.000 claims description 29
- 238000005273 aeration Methods 0.000 claims description 29
- 239000003206 sterilizing agent Substances 0.000 claims description 29
- -1 hydroxide ions Chemical class 0.000 claims description 25
- 230000001954 sterilising effect Effects 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 238000004659 sterilization and disinfection Methods 0.000 claims description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 17
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 17
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 17
- 150000002500 ions Chemical class 0.000 claims description 16
- 238000010828 elution Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 10
- 229910021645 metal ion Inorganic materials 0.000 claims description 9
- 238000004062 sedimentation Methods 0.000 claims description 9
- 239000002244 precipitate Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- FPWJLQXCGHQXLL-UHFFFAOYSA-N [P].OP(O)(O)=O Chemical compound [P].OP(O)(O)=O FPWJLQXCGHQXLL-UHFFFAOYSA-N 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- YRIZYWQGELRKNT-UHFFFAOYSA-N 1,3,5-trichloro-1,3,5-triazinane-2,4,6-trione Chemical compound ClN1C(=O)N(Cl)C(=O)N(Cl)C1=O YRIZYWQGELRKNT-UHFFFAOYSA-N 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 4
- 150000001450 anions Chemical class 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 239000007800 oxidant agent Substances 0.000 claims description 4
- 229940085991 phosphate ion Drugs 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- 229950009390 symclosene Drugs 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 150000002926 oxygen Chemical class 0.000 claims description 2
- 150000001768 cations Chemical class 0.000 claims 1
- 230000000249 desinfective effect Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 239000000047 product Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 21
- 239000000463 material Substances 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 13
- 241000894006 Bacteria Species 0.000 description 10
- 239000000460 chlorine Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000005276 aerator Methods 0.000 description 7
- 239000010802 sludge Substances 0.000 description 6
- 230000001546 nitrifying effect Effects 0.000 description 5
- 235000021110 pickles Nutrition 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910000398 iron phosphate Inorganic materials 0.000 description 4
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 3
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000852 hydrogen donor Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 2
- 150000002826 nitrites Chemical class 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排水中に種々の態
様で存在する窒素及び燐を除去する排水中の窒素及び燐
の除去装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing nitrogen and phosphorus present in waste water in various ways.
【０００２】[0002]
【従来の技術】近時、河川、湖沼及び海洋等に於ける窒
素及びリンによる富栄養化が問題となっており、如何に
種々の排水から窒素及びリンを効率的に除去するかが重
要な問題となっている。2. Description of the Related Art Recently, eutrophication by nitrogen and phosphorus in rivers, lakes, marshes and the ocean has become a problem, and it is important how to efficiently remove nitrogen and phosphorus from various wastewaters. It is a problem.
【０００３】このような排水の処理方法で、優れた技術
としては、例えば、特公昭６３−１２６７８号に記載さ
れているものがある。これは、下部に廃水の流入口を、
上部に廃水の流出口をそれぞれ備えた絶縁物からなる缶
体の内部に一対の電極を所定の間隔を隔てて立設し、相
互間に廃水の通過を妨げない間隙を形成できる形状であ
ってアルミニウムを主成分とし、少なくとも鉄を数％含
み、表面に酸化被膜あるいは水酸化被膜を形成した充填
材を缶体内に充填し、電極間に直流電圧を印加しながら
廃水を流入口から送入し、廃水が充填材の間隙を通過す
る間に電解処理し、汚濁物質の分解、吸着、凝集等を行
なってフロック化することにより汚濁物質を缶体上部に
分解浮上させる電気分解による廃水処理方法である。As an excellent technique in such a wastewater treatment method, there is, for example, one described in JP-B-63-12678. This has a wastewater inlet at the bottom,
A pair of electrodes are erected at predetermined intervals inside a can body made of an insulator having an outlet for wastewater at an upper portion thereof at a predetermined interval, and a gap can be formed between the electrodes so as not to hinder the passage of wastewater. Filling the can with a filler containing aluminum as the main component and at least a few% of iron, and having an oxide film or a hydroxide film formed on the surface, and supplying wastewater from the inlet while applying a DC voltage between the electrodes. Electrolytic treatment while the wastewater passes through the gap between the fillers, and decomposes, adsorbs, agglomerates, etc. the pollutants to form flocs. is there.
【０００４】この方法は、窒素及び燐を主として分解除
去するというものではないが、良好に除去できる優れた
ものである。しかしこの方法を用いる缶体に導かれる廃
水の種類によっては、廃水中の塩素イオンや硫酸根イオ
ンの不足を補ってこの方法で行なわれる反応を促進する
機能を有する塩類を添加剤として使用する必要があるの
が若干問題である。Although this method does not mainly remove nitrogen and phosphorus by decomposition, it is an excellent method capable of removing nitrogen and phosphorus satisfactorily. But depending on the type of waste water is led to the can body using this method, it is necessary to use a salt having a function of promoting the reaction carried out in this way to compensate for the shortage of chlorine ions or sulfuric acid radical ions in the waste water as an additive There are some problems.
【０００５】[0005]
【発明が解決しようとする課題】本発明に於ては、滅菌
剤を除いては、前記添加剤のような薬品を使用せず、簡
明な構成により、極めて小さな設置スペースで、かつ短
時間で良好な窒素及び燐の除去が行なえる装置を提供す
ることを解決の課題とするものである。In the present invention, except for the sterilizing agent, chemicals such as the above-mentioned additives are not used, and with a simple structure, an extremely small installation space and a short time are required. It is an object of the present invention to provide an apparatus capable of excellently removing nitrogen and phosphorus.
【０００６】[0006]
【課題を解決するための手段】本発明の構成の要旨とす
るところは、排水をこの中に導き所定の処理を行なう溶
着槽と、その処理水を更に処理する曝気滅菌槽と、その
処理水を受け取って固形成分を沈殿させる沈殿槽とで構
成した排水中の窒素及び燐の除去装置であって、前記溶
着槽には、一部を陽極に残部を陰極にすべく電源を接続
した複数の電極であって、少なくとも陽極となるそれを
水中に溶出する溶出用金属で構成した複数の電極と、そ
の複数の電極間に介在させる吸着材であって、多孔質セ
ラミックで構成した吸着材と、処理水を撹拌するための
撹拌用の曝気手段とを配し、前記曝気滅菌槽には、処理
水の滅菌作用を行ない、処理水中に溶け出している溶出
金属を酸化し、かつ少なくとも処理水中で次亜塩素酸を
生成する滅菌剤か又は少なくとも処理水中に溶け出して
いる溶出金属を酸化する酸化剤及び次亜塩素酸をその成
分として含む滅菌剤のいずれかを該処理水中に投入する
滅菌剤投入手段と、処理水を撹拌する曝気手段とを配す
ることとし、前記溶着槽では、導入された燐酸性燐及び
アンモニア性窒素を含む排水中で、前記電極のうち陽極
では陰イオンが引き寄せられ、そのうちの燐酸イオンは
該陽極から溶出する溶出金属イオンとイオン結合し、か
つ水酸イオンは陽極に陰電荷を供与して水及び酸素とな
り、この酸素により排水中の有機物が酸化分解され、他
方、前記電極のうち陰極では陽イオンが引き寄せられ、
そのうちの水素イオンは、陰電荷を受け取って水素ガス
となり、この水素ガスの付着により浮上しようとする前
記燐酸イオンと溶出金属イオンとのイオン結合物のフロ
ック、及び排水中で電極間に大きな電流を流すこととな
るような偏在の生じたイオンのそれぞれを、前記撹拌用
の曝気手段から噴出するエアにより撹拌して水中に分散
させ、かつ前記多孔質セラミックの吸着材により、過剰
溶出金属を吸着して排水中への溶出残存量を減少させ、
次の曝気滅菌槽では、前記溶着槽から流入した処理水中
に前記滅菌剤の投入手段から滅菌剤を投入し、上記滅菌
剤により該処理水の滅菌を行なうとともに、溶解してい
る溶出金属を酸化物として析出させてフロック化させ、
同時に、溶着槽で陰極に析出せず、イオンのまま残った
アンモニウムイオンが滅菌剤の処理水への投入によって
生成した次亜塩素酸又は滅菌剤の成分である次亜塩素酸
と反応して、最終的には、窒素ガス、水、塩酸に分解さ
れて、アンモニア性の窒素が除去され、同時に溶着槽で
上昇した処理水のｐＨを、ここで生成した塩酸で中和
し、更に次の沈殿槽では、前記イオン結合物のフロック
及び溶出金属の酸化物フロックを沈殿させ、生じた沈殿
物を系外に引き抜き、上澄水を分離して放流するように
構成した排水中の窒素及び燐の除去装置であり、これに
よって前記課題を解決することができる。SUMMARY OF THE INVENTION The gist of the present invention is as follows. A welding tank for guiding waste water into the tank and performing a predetermined treatment; an aeration sterilization tank for further treating the treated water; And a sedimentation tank for receiving and depositing solid components, wherein the welding tank has a plurality of units connected to a power source so that a part is an anode and the rest is a cathode. Electrodes, a plurality of electrodes composed of a metal for elution that elutes into water at least as an anode, and an adsorbent interposed between the plurality of electrodes, and an adsorbent composed of porous ceramic, Aeration means for agitation for stirring the treated water is provided, and the aeration sterilization tank performs a sterilizing action of the treated water to oxidize the dissolved metal dissolved in the treated water, and at least in the treated water. Is it a sterilant that produces hypochlorous acid? Means for injecting at least one of an oxidizing agent for oxidizing the eluted metal dissolved in the treated water and a sterilizing agent containing hypochlorous acid into the treated water, and aeration for stirring the treated water. In the welding tank, anions are attracted to the anode of the electrode in the waste water containing the introduced phosphoric acid phosphorus and ammoniacal nitrogen, and the phosphate ions are eluted from the anode. The hydroxide ions ionically bond with the eluted metal ions, and the hydroxyl ions donate a negative charge to the anode to become water and oxygen, and this oxygen oxidizes and decomposes the organic matter in the wastewater. Attracted,
Among them, hydrogen ions receive a negative charge to become hydrogen gas, and floc of an ion bond of the phosphate ion and the eluted metal ion that is to float by the attachment of the hydrogen gas, and a large current flows between the electrodes in the drainage water. Each of the ions that have been unevenly distributed so as to flow is stirred by air jetted from the aeration means for stirring to be dispersed in water, and the adsorbent of the porous ceramic adsorbs excessively eluted metal. To reduce the amount of elution remaining in the wastewater,
In the next aeration sterilization tank, a sterilizing agent is injected into the processing water flowing from the welding tank from the sterilizing agent injection means, the processing water is sterilized by the sterilizing agent, and the dissolved eluting metal is oxidized. Precipitate as a material and make it floc,
At the same time, the ammonium ions, which do not precipitate on the cathode in the welding tank and remain as ions, react with hypochlorous acid generated by injection of the sterilizing agent into the treated water or hypochlorous acid, which is a component of the sterilizing agent, Eventually, it is decomposed into nitrogen gas, water and hydrochloric acid to remove ammonia nitrogen, and at the same time, neutralizes the pH of the treated water that has risen in the welding tank with the hydrochloric acid generated here, and further precipitates In the tank, the floc of the ion-bonded substance and the oxide floc of the eluted metal are precipitated, the generated precipitate is drawn out of the system, and the supernatant water is separated and discharged to discharge nitrogen. And an apparatus for removing phosphorus, whereby the above-mentioned problem can be solved.
【０００７】この装置は、その運転過程で生じる酸素に
より排水中の有機物の酸化分解等を行なうことができる
が、主として燐及び窒素を除去することを目的とするも
のであり、他の汚れの成分が併せて多量に含まれている
場合には、それに適する他の除去装置でその成分を除去
した後にこの装置で燐及び窒素の除去を行なうように構
成するのが適当である。This apparatus is capable of oxidatively decomposing organic substances in wastewater by oxygen generated in the course of its operation, but it is mainly intended to remove phosphorus and nitrogen, and it is intended to remove other components of dirt. In addition, when a large amount is contained, it is appropriate to remove phosphorus and nitrogen by this apparatus after removing the component by another removing apparatus suitable for the apparatus.
【０００８】前記電極は、少なくとも陽極に関しては、
該電極から水中に溶出する溶出用金属で構成すれば良い
のは既述の通りであり、例えば、複数のステンレス製の
板状部材で構成することができる。または鉄やアルミニ
ウムの板材を採用することもできる。陰極を構成する電
極に関しても同様の材質・形状にすることができるが、
特にその必要はない。カーボン等で、例えば、同様な板
状に構成することもできる。また特に陽極を構成する電
極のサイズは、単位時間あたりの溶出金属量を考慮して
定めるべきである。これは、これに接続する電源の電圧
をも考慮して定められるべきは当然である。[0008] The electrode, at least with respect to the anode,
What is necessary is just to comprise from the metal for elution which elutes in water from this electrode as mentioned above, for example, it can comprise with a some stainless steel plate-shaped member. Alternatively, an iron or aluminum plate may be used. The same material and shape can be used for the electrode constituting the cathode,
There is no particular need. For example, a similar plate shape can be made of carbon or the like. In particular, the size of the electrode constituting the anode should be determined in consideration of the amount of dissolved metal per unit time. This should be determined in consideration of the voltage of the power supply connected thereto.
【０００９】また前記電極に接続する電源は直流電源と
するのが適当である。その電圧は、導入される排水中の
燐酸性燐の濃度に比例した電流を流すために必要なレベ
ルに昇降させるべく制御するのが好ましい。即ち、少な
くとも排水中の燐酸イオンと結合すべき金属イオンを陽
極から溶出するのに必要な電流を流し得る電圧に制御す
る。金属イオンの量は適当な割合で若干過剰に溶出さ
せ、燐酸イオンの全量を金属イオンとイオン結合させ、
他方、余分の溶出金属は後に酸化させて析出させ、これ
と燐酸イオンのイオン結合物とを凝集させて、該燐酸の
イオン結合物の枕澱槽での沈殿を助けるようにするのが
好ましい。なお導入する排水中の燐酸イオンの割合に大
きな変動がない場合には、一定電圧に固定することも不
都合ではない。上記のような有用な過剰溶出分を越える
若干の過剰溶出分は前記吸着材で吸着し、後段での処理
を不要とすることができる。The power supply connected to the electrodes is suitably a DC power supply. Preferably, the voltage is controlled to raise or lower to the level required to pass a current proportional to the concentration of phosphorous phosphorus in the introduced wastewater. That is, the voltage is controlled to a value at which a current necessary to elute at least the metal ions to be bound to the phosphate ions in the wastewater from the anode can flow. The amount of the metal ion is slightly eluted at an appropriate ratio, and the entire amount of the phosphate ion is ion-bonded to the metal ion.
On the other hand, it is preferable that the excess eluted metal is oxidized and precipitated later, and this is coagulated with the ion-bonded substance of the phosphate ion so as to assist the precipitation of the ion-bonded substance of the phosphoric acid in the column. If there is no large change in the proportion of phosphate ions in the wastewater to be introduced, it is not inconvenient to fix the voltage to a constant voltage. Slight excess elution exceeding the useful excess elution as described above is adsorbed by the adsorbent, thereby eliminating the need for subsequent treatment.
【００１０】前記吸着材は、溶着槽に導入する排水をス
ムーズに通過できるものであって、前記のように、必要
な過剰溶出割合を越える過剰溶出金属等を吸着できるも
のであれば、特定のそれに限定されない。例えば、前記
吸着材は、粘土を焼成したセラミックの２〜７mmの粒度
の粉砕物とガラス粉とベントナイトとの混練物を焼成し
て構成することができる。また前記吸着材は、陰陽の電
極間に配してその短絡を防止すること及び前記のような
吸着作用を果たし得るならば、その外形及び設置の仕方
を特定のそれに限定する必要はない。例えば、板状に構
成し、前記複数の電極間に配することとすることができ
る。また例えば、前記吸着材は、端部に開口する電極挿
入用の空隙部を備えた板状に構成し、前記各電極を各一
枚の板状のそれの空隙部に挿入することとすることがで
きる。[0010] The adsorbent is a specific adsorbent that can smoothly pass through the wastewater introduced into the welding tank and, as described above, can adsorb an excessively eluted metal or the like in excess of a necessary excessively eluted ratio. Not limited to that. For example, the adsorbent can be constituted by firing a kneaded material of a ceramic obtained by firing clay, having a particle size of 2 to 7 mm, glass powder and bentonite. In addition, if the adsorbent can be disposed between the yin and yang electrodes to prevent the short circuit and perform the above adsorbing action, it is not necessary to limit the outer shape and installation method to a specific one. For example, it may be configured in a plate shape and arranged between the plurality of electrodes. Further, for example, the adsorbent is formed in a plate shape having a gap portion for inserting an electrode which is opened at an end portion, and each of the electrodes is inserted into a gap portion of each one plate shape. Can be.
【００１１】前記滅菌剤としては、前記条件を満足し得
るそれを自由に採用することができるが、例えば、加水
分解して次亜塩素酸とイソシアヌール酸を生成するトリ
クロロイソシアヌール酸を採用するのが適当である。あ
るいは滅菌剤として、単一の成分ではなく、次亜塩素酸
と酸化剤とを組合せたもの等を採用することも可能であ
る。滅菌剤投入手段を二つ以上構成して、次亜塩素酸と
酸化剤とを別々のそれから投入するように構成しても不
都合ではない。As the sterilizing agent, any one which can satisfy the above conditions can be freely used. For example, trichloroisocyanuric acid which hydrolyzes to produce hypochlorous acid and isocyanuric acid is used. Is appropriate. Alternatively, it is also possible to employ a combination of hypochlorous acid and an oxidizing agent instead of a single component as a sterilizing agent. It is not inconvenient to configure two or more sterilizing agent charging means so that hypochlorous acid and the oxidizing agent are separately charged.
【００１２】[0012]
【発明の実施の形態】以下、本発明の好適な実施の形態
を実施例に基づいて添付図面を参照しつつ詳細に説明す
る。なお、以下に述べる実施例は、本発明の好適な実施
例であるから、技術的に好ましい種々の限定が付されて
いるが、本発明の範囲は、以下の説明に於いて特に本発
明を限定する旨の記載がない限り、これらの態様に限ら
れるものではない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. It should be noted that the embodiments described below are preferred embodiments of the present invention, and therefore, various technically preferred limitations are added.However, the scope of the present invention is not particularly limited to the scope of the present invention in the following description. The embodiments are not limited to these embodiments unless otherwise specified.
【００１３】図１は、本発明の排水中の窒素及び燐の除
去装置の一実施例を組み込んだ漬物工場排水の浄化シス
テムのシステム構成図である。図１に示すように、この
漬物工場排水の浄化システムは、原水を導入する調整槽
１と、調整槽１の原水をポンプ１ａで汲み上げ、計量し
て生物処理槽３に供給する計量槽２と、第１槽の嫌気槽
３ａ、第２槽の第１好気槽３ｂ及び第３槽の第２好気槽
３ｃの三槽からなり、計量槽２から受け取った原水を接
触酸化法で処理する生物処理槽３と、複数枚の板状吸着
材４、４…を介して複数枚の電極５、５…を配した溶着
槽６であって、特に燐の除去を行なう溶着槽６と、溶着
槽６で処理した処理水を受け取って特に滅菌及び窒素の
除去を行なう曝気滅菌槽７と、曝気滅菌槽７の処理水を
受け取って固形成分の沈殿及び沈殿物の引き抜きを行な
う沈殿槽８と、引き抜いた沈殿物の濃縮を行なう汚泥濃
縮槽９と、その汚泥を脱水する脱水機１０と、調整槽
１、生物処理槽３、溶着槽６及び曝気滅菌槽７にエアの
供給を行なうブロワー１１とで基本的に構成するもので
ある。FIG. 1 is a system diagram of a system for purifying the drainage of a pickle factory incorporating one embodiment of the apparatus for removing nitrogen and phosphorus in wastewater of the present invention. As shown in FIG. 1, the system for purifying the drainage of a pickle factory comprises a regulating tank 1 for introducing raw water, a measuring tank 2 for pumping raw water from the regulating tank 1 with a pump 1a, measuring and supplying the raw water to a biological treatment tank 3. , An anaerobic tank 3a as a first tank, a first aerobic tank 3b as a second tank, and a second aerobic tank 3c as a third tank, and the raw water received from the measuring tank 2 is treated by a catalytic oxidation method. A biological treatment tank 3 and a welding tank 6 in which a plurality of electrodes 5, 5,... Are arranged via a plurality of plate-shaped adsorbents 4, 4,. aeration sterilization tank 7 for particular sterilization and removal of the nitrogen receives treated water treated with the bath 6, a sedimentation tank 8 which receives the treated water in the aeration sterile tank 7 performs withdrawal of precipitation and precipitation of solid components, sludge concentration tank 9 to perform concentration of precipitate withdrawn, a dehydrator 10 for dehydrating the sludge, tone Tank 1, in which basically consists of a blower 11 for supplying air to the biological treatment tank 3, the welding chamber 6 and aeration sterilization tank 7.
【００１４】前記調整槽１には、その底部に、前記ブロ
ワー１１からの配管に接続した散気管１ｂが配してあ
り、これを通じて槽内に散気できるようになっている。The adjusting tank 1 is provided at its bottom with an air diffuser 1b connected to a pipe from the blower 11, through which air can be diffused into the tank.
【００１５】前記生物処理槽３は、前記計量槽２からの
原水の供給を第１槽の嫌気槽３ａで受け取り、ここで嫌
気条件下の細菌の働きにより処理された処理水が第２槽
の第１好気槽３ｂ、その処理水が第２好気槽３ｃと処理
されて、また第１槽である嫌気槽３ａに返送され、これ
が繰り返されるようになっており、第２好気槽３ｃには
処理水の返送用のポンプ３ｄが配してある。前記生物処
理槽３は、その嫌気槽３ａ、第１好気槽３ｂ及び第２好
気槽３ｃのいずれにも接触材３ｅ、３ｅ、３ｅが充填し
てあり、更に嫌気槽３ａ及び第２好気槽３ｃには、その
底部に槽内の処理水を循環させる循環ポンプ３ｆ、３ｆ
が配してある。また第１好気槽３ｂ及び第２好気槽３ｃ
の底部には、前記ブロワ１１からの配管に接続したエア
レータ３ｇ、３ｇが配してある。The biological treatment tank 3 receives the supply of raw water from the measuring tank 2 in the first anaerobic tank 3a, where the treated water treated by the action of bacteria under anaerobic conditions is supplied to the second tank. The first aerobic tank 3b, the treated water thereof is treated with the second aerobic tank 3c, and returned to the first anaerobic tank 3a, and this is repeated, and the second aerobic tank 3c Is provided with a pump 3d for returning treated water. In the biological treatment tank 3, the anaerobic tank 3a, the first aerobic tank 3b, and the second aerobic tank 3c are all filled with contact materials 3e, 3e, and 3e. Circulation pumps 3f, 3f for circulating treated water in the tank at the bottom thereof are provided in the air tank 3c.
Is arranged. In addition, the first aerobic tank 3b and the second aerobic tank 3c
The aerators 3g and 3g connected to the pipe from the blower 11 are arranged at the bottom of the aerator.
【００１６】前記溶着槽６は、後述する燐酸の除去作用
が、従来の脱燐装置と比べて極めて短い時間で行なわれ
得るので、その容量もその程度に小さなものに構成し得
る。そしてこの溶着槽６には、図２に示すように、板状
吸着材４、４…を電極５の厚み分だけあけて配列し、そ
の隙間に電極５、５…を各１枚づつ挿入したものを充填
する。板状吸着材４、４…相互は図示しないボルト・ナ
ット等の結合手段で結合する。ここでは９枚の板状吸着
材４、４…を用いて以上のように配列した。The capacity of the welding tank 6 can be configured to be as small as that of the conventional dephosphorizer since the action of removing phosphoric acid, which will be described later, can be performed in an extremely short time. As shown in FIG. 2, the plate-shaped adsorbents 4, 4,... Are arranged in the welding tank 6 with a gap corresponding to the thickness of the electrode 5, and the electrodes 5, 5,. Fill things. The plate-shaped adsorbents 4, 4,... Here, nine plate-shaped adsorbents 4, 4,... Are arranged as described above.
【００１７】なおまたここで用いる板状吸着材４は次の
ようにして構成する。即ち、先ず粘土を焼成して得たセ
ラミックを粉砕し、その２〜７mmの粒度の粉砕物をガラ
ス粉及びベントナイト粉と混合し、かつ加水混練し、得
られた混練物を板状に成形して焼成する。このとき、混
合割合は、セラミックの２〜７mmの粉砕物：ガラス粉：
ベントナイト粉＝８０：５：１５（体積比）とする。ま
た板状に成形した混練物の焼成温度は１０５０℃とし
た。しかして得られる板状吸着材４は、溶着槽６に導入
される処理水を自由かつスムーズに通過させることがで
きる程度の多数の小孔を有するものとなる。The plate-shaped adsorbent 4 used here is constituted as follows. That is, first, the ceramic obtained by firing the clay is crushed, and the crushed material having a particle size of 2 to 7 mm is mixed with glass powder and bentonite powder and kneaded with water, and the obtained kneaded material is formed into a plate shape. And bake. At this time, the mixing ratio was 2 to 7 mm of the crushed ceramic material: glass powder:
Bentonite powder = 80: 5: 15 (volume ratio). The sintering temperature of the kneaded material formed into a plate shape was 1050 ° C. The plate-shaped adsorbent 4 thus obtained has a large number of small holes that allow the treated water introduced into the welding tank 6 to pass freely and smoothly.
【００１８】前記電極５としてはステンレス製のそれを
採用する。８枚のステンレス製の板状の電極５、５…を
前記板状吸着材４、４…の間に各１枚づつ装入する。各
電極５、５…には、図１に示すように、交互に陽極と陰
極とが配列することとなるように給電装置１２を接続す
る。なお特に陽極となる電極５、５…のサイズ及び数は
処理水中の燐酸性燐の量に対応して定まる溶出すべき鉄
イオンの量を考慮して定めるものである。若干の過剰溶
出がある程度に定めることとするのは既述の通りであ
る。The electrode 5 is made of stainless steel. Each of the eight stainless steel plate-like electrodes 5, 5,... Is inserted between the plate-like adsorbents 4, 4,. As shown in FIG. 1, a power supply device 12 is connected to each of the electrodes 5, 5,... So that an anode and a cathode are alternately arranged. In particular, the size and number of the electrodes 5, 5,... Serving as anodes are determined in consideration of the amount of iron ions to be eluted, which is determined according to the amount of phosphoric acid phosphorus in the treated water. As described above, the slight excess elution is determined to some extent.
【００１９】前記給電装置１２は、直流電源を基本的構
成要素とするもので、電圧を可変できる手段を備えたも
のとする。ここでは生物処理槽３で処理された漬物工場
排水が処理対象であり、その有する燐酸性燐の含有割合
及び電極５のサイズを考慮して、該電極５、５…の陰極
と陽極との間に３Ｖの電圧をかけるように設定した。こ
の場合は、陰陽の電極５、５…間に３Ｖの電圧をかけた
場合に、処理水中の燐酸イオンと結合すべき適量プラス
若干過剰の鉄イオンが陽極から溶出するのに適当な電流
となるからである。即ち、３Ｖの電圧をかけた場合の電
流が、鉄イオンの量を若干過剰に溶出させることになる
電流のレベルとなるものである。The power supply device 12 has a DC power supply as a basic component, and is provided with means capable of varying the voltage. Here, the pickled plant wastewater treated in the biological treatment tank 3 is to be treated. Considering the content of phosphoric acid phosphorus contained in the wastewater and the size of the electrode 5, the distance between the cathode and the anode of the electrodes 5, 5,. Was set so as to apply a voltage of 3 V. In this case, when a voltage of 3 V is applied between the positive and negative electrodes 5, 5,..., An appropriate current to be combined with phosphate ions in the treated water plus a slight excess of iron ions is appropriate to elute from the anode. Because. That is, the current when a voltage of 3 V is applied becomes the level of the current at which the amount of iron ions is slightly eluted.
【００２０】また前記溶着槽６の底部には散気管６ａを
配し、これに前記ブロワー１１からの配管を接続する。
この散気管６ａは、細かな気泡を噴出させて処理水を撹
拌し、この槽中で発生したフロックを処理水中に分散さ
せ、更に処理水中に分散する固形成分をフロックに付着
させるようにするものである。また燐酸イオン等のイオ
ンを同様に分散してイオンの偏在をなくし、陰陽の電極
５、５…間を流れる電流が過大にならないようにするも
のでもある。An air diffuser 6a is provided at the bottom of the welding tank 6, and a pipe from the blower 11 is connected to the air diffuser 6a.
The air diffuser 6a spouts fine bubbles to stir the treated water, disperses the floc generated in the tank in the treated water, and further attaches a solid component dispersed in the treated water to the floc. It is. In addition, ions such as phosphate ions are similarly dispersed to eliminate uneven distribution of ions so that the current flowing between the negative and positive electrodes 5, 5,... Is not excessive.
【００２１】前記曝気滅菌槽７は、その上部に滅菌筒１
３を備えており、ここから適量の滅菌剤を処理水中に投
入する。滅菌剤としてはここではトリクロロイソシアヌ
ール酸を用いた。また前記曝気滅菌槽７の底部には、散
気管７ａを配し、これに前記ブロワー１１からの配管を
接続する。この散気管７ａは、細かな気泡を噴出させて
処理水を撹拌し、滅菌剤を処理水中の各成分に良好に接
触させる。しかして滅菌作用を促進する。更に、溶着槽
６で溶出し、未反応でこの槽に移された溶解性の溶着
材、即ち、溶出鉄を酸化させる酸化作用、及び滅菌剤の
加水分解で生成する次亜塩素酸とアンモニウムイオンと
の反応を、それぞれ促進する趣旨である。処理水を撹拌
し、フロックを処理水中に分散させ、処理水中に分散す
るその他の固形成分をフロックに付着させようとする趣
旨もある。The aeration sterilization tank 7 has a sterilization cylinder 1
3 from which an appropriate amount of sterilant is introduced into the treated water. Here, trichloroisocyanuric acid was used as a sterilant. A diffuser 7a is provided at the bottom of the aeration sterilization tank 7, and a pipe from the blower 11 is connected to the diffuser 7a. The air diffuser 7a ejects fine air bubbles to stir the treated water and to bring the sterilant into good contact with each component in the treated water. Thus promotes the sterilization action. Further, a soluble welding material eluted in the welding tank 6 and transferred to the tank unreacted, that is, an oxidizing action to oxidize the eluted iron, and hypochlorous acid and ammonium ion generated by hydrolysis of the sterilizing agent. The purpose is to promote each of the reactions. There is also a purpose of stirring the treated water, dispersing the floc in the treated water, and attaching other solid components dispersed in the treated water to the floc.
【００２２】この実施例では、漬物工場排水の浄化シス
テムを以上のように構成したので、次のように作用す
る。漬物工場排水である原水は調整槽１に導入される。
調整槽１にはブロワー１１よりエアが供給されており、
散気管１ｂから槽内に小気泡状のエアが噴出され、好気
性菌の活動が促進され、有機物の酸化分解作用が行なわ
れている。In this embodiment, since the system for purifying the drainage of the pickle factory is constructed as described above, it operates as follows. Raw water, which is the drainage of a pickle factory, is introduced into the adjustment tank 1.
Air is supplied to the adjustment tank 1 from the blower 11.
Small bubble-like air is blown into the tank from the air diffuser 1b to promote the activity of the aerobic bacteria, thereby oxidizing and decomposing organic substances.
【００２３】この調整槽１中の原水はポンプ１ａで計量
槽２に汲み上げられ、計量されて次段の生物処理槽３に
供給される。生物処理槽３では、第１槽である嫌気槽３
ａと、第２、第３槽である第１好気槽３ｂ及び第２好気
槽３ｃとの間の嫌気条件下と好気条件下の作用を循環さ
せ、硝化・脱窒を行なうものである。脱窒の過程では有
機物の分解作用も行なわれる。The raw water in the adjusting tank 1 is pumped up by the pump 1a into the measuring tank 2, measured and supplied to the next biological treatment tank 3. In the biological treatment tank 3, the anaerobic tank 3, which is the first tank, is used.
a, and the action under anaerobic and aerobic conditions between the first and second aerobic tanks 3b and 3c as the second and third tanks is circulated to perform nitrification and denitrification. is there. In the process of denitrification, an organic substance is also decomposed.
【００２４】原水は生物処理槽３では、先ず第１槽であ
る嫌気槽３ａで受給され、ここで嫌気条件下で脱窒作用
が行なわれる。即ち、後述するように、第２、第３槽で
ある第１好気槽３ｂ及び第２好気槽３ｃに於ける硝化作
用で亜硝酸性窒素（ＮＯ2−Ｎ）や硝酸性窒素（ＮＯ3−
Ｎ）が生じ、これらが含まれた処理水が返送され、脱窒
菌の作用でそれらは窒素（Ｎ2）ガスに還元される。こ
の脱窒反応には水素供与体の存在が不可欠であり、通
常、水素供与体として有機物が用いられる。なお脱窒菌
は接触材３ｅに付着しており、前記循環ポンプ３ｆで処
理水が循環させられて脱窒菌との良好な接触が確保され
ている。In the biological treatment tank 3, raw water is first received in an anaerobic tank 3a, which is a first tank, where denitrification is performed under anaerobic conditions. That is, as will be described later, nitrite nitrogen (NO 2 —N) and nitrate nitrogen (NO) are formed by nitrification in the first and second aerobic tanks 3b and 3c as the second and third tanks. 3 −
N) is produced, and the treated water containing these is returned, and they are reduced to nitrogen (N 2 ) gas by the action of denitrifying bacteria. The presence of a hydrogen donor is indispensable for this denitrification reaction, and an organic substance is usually used as the hydrogen donor. The denitrifying bacteria adhere to the contact material 3e, and the treated water is circulated by the circulation pump 3f to ensure good contact with the denitrifying bacteria.
【００２５】第１槽の嫌気槽３ａで処理された処理水は
第２槽である第１好気槽３ｂに移され、好気条件下で硝
化作用が行なわれる。この作用は、ＢＯＤ酸化菌の異化
代謝によって有機態窒素から転換されたアンモニウム性
窒素（ＮＨ4−Ｎ）を硝化菌、即ち、亜硝酸菌及び硝酸
菌によって亜硝酸性窒素（ＮＯ2−Ｎ）又は硝酸性窒素
（ＮＯ3−Ｎ）に酸化する作用である。硝化菌は接触材
３ｅに付着しており、アンモニウム性窒素は、前記エア
レータ３ｇを通じて散気されるエアの動き等により循環
される処理水とともに移動して前記接触材３ｅに付着し
ている硝化菌と接触して前記酸化作用が行なわれる。ま
たエアレータ３ｇの散気動作により、第１好気槽３ｂ内
が良好な好気条件に保持されるのは云うまでもない。The treated water treated in the anaerobic tank 3a of the first tank is transferred to the first aerobic tank 3b, which is the second tank, and nitrification is performed under aerobic conditions. The effect of this is that ammonium nitrogen (NH 4 -N) converted from organic nitrogen by the catabolic metabolism of BOD oxidizing bacteria is converted into nitrite nitrogen (NO 2 -N) by nitrifying bacteria, that is, nitrite and nitrate. Alternatively, it is an action of oxidizing to nitrate nitrogen (NO 3 -N). The nitrifying bacteria adhere to the contact material 3e, and the ammonium nitrogen moves together with the circulated water due to the movement of the air diffused through the aerator 3g and adheres to the contact material 3e. And the oxidizing action is performed. Needless to say, the aerating operation of the aerator 3g keeps the inside of the first aerobic tank 3b under favorable aerobic conditions.
【００２６】第１好気槽３ｂで以上のような作用を受け
た処理水は第３槽である第２好気槽３ｃに移動し、処理
水中の残余のアンモニウム性窒素は接触材３ｅに付着し
ている亜硝酸菌及び硝酸菌のような硝化菌によって亜硝
酸性窒素又は硝酸性窒素に酸化される。アンモニウム性
窒素は、前記エアレータ３ｇの前記作用及び循環ポンプ
３ｆの作用により循環される処理水の循環移動で、前記
接触材３ｅに付着している硝化菌により良好に接触し、
硝化作用が促進されるものである。エアレータ３ｇの散
気動作により、第２好気槽３ｃ内が良好な好気条件に保
持されるのも云うまでもない。The treated water subjected to the above-mentioned action in the first aerobic tank 3b moves to the second aerobic tank 3c as the third tank, and the remaining ammonium nitrogen in the treated water adheres to the contact material 3e. It is oxidized to nitrite or nitrate by nitrifying bacteria such as nitrites and nitrites. The ammonium nitrogen makes good contact with the nitrifying bacteria adhering to the contact material 3e by the movement of the treated water circulated by the action of the aerator 3g and the action of the circulation pump 3f,
Nitrification is promoted. It goes without saying that the inside of the second aerobic tank 3c is maintained under favorable aerobic conditions by the aeration operation of the aerator 3g.
【００２７】こうして硝化菌の硝化作用で生成した亜硝
酸性窒素（ＮＯ2−Ｎ）及び硝酸性窒素（ＮＯ3−Ｎ）
は、返送用のポンプ３ｄで返送される処理水とともに第
１槽である嫌気槽３ａに送り返され、該嫌気槽３ａでは
前記脱窒作用が行なわれる。そして該嫌気槽３ａから第
３槽である第２好気槽３ｃまでの前記作用がまた繰り返
される。これは所定時間繰り返される。The nitrite nitrogen (NO 2 -N) and the nitrate nitrogen (NO 3 -N) thus generated by the nitrification of the nitrifying bacteria
Is returned to the first anaerobic tank 3a together with the treated water returned by the returning pump 3d, and the denitrification action is performed in the anaerobic tank 3a. The operation from the anaerobic tank 3a to the second aerobic tank 3c as the third tank is repeated again. This is repeated for a predetermined time.
【００２８】その後、生物処理槽３の第３槽である第２
好気槽３ｃから前記溶着槽６に処理水が移され、該溶着
槽６では次の作用が行なわれる。なお、このとき先ず給
電装置１２により、前記したように、陰極となる４枚の
電極５、５…と陽極となる電極５、５…間には３Ｖの電
圧がかけられており、また前記散気管６ａからブロワー
１１からのエアが噴出され、処理水の撹拌作用が行なわ
れている。Then, the second biological treatment tank 3, which is the third tank,
The treated water is transferred from the aerobic tank 3c to the welding tank 6, and the following operation is performed in the welding tank 6. At this time, first, as described above, a voltage of 3 V is applied between the four electrodes 5, 5,... Serving as cathodes and the electrodes 5, 5,. Air is blown from the blower 11 from the trachea 6a, and the agitation of the treated water is performed.
【００２９】しかして溶着槽６中に導入された処理水中
に於いて、前記電極５、５…のうち陽極では、該処理水
中に含まれる陰イオンである燐酸イオンや酸素イオン等
が引き寄せられ、そのうち燐酸イオンは同時にステンレ
スの板材である陽極から溶出している鉄イオンと、 Ｆｅ3+＋ＰＯ 4 3-→ＦｅＰＯ4 ３Ｆｅ2+＋２ＰＯ4 3-→Ｆｅ3（ＰＯ4）2 のように反応してイオン結合する。The treated water introduced into the welding tank 6
Of the electrodes 5, 5,...
Phosphate and oxygen ions, which are anions contained in
Are attracted, and phosphate ions are simultaneously absorbed in stainless steel.
Iron ions eluted from the anode,3++ PO Four 3-→ FePOFour 3Fe2++ 2POFour 3-→ FeThree(POFour)Two To form an ionic bond.
【００３０】またそのうち処理水中に溶存していた酸素
イオンは陰電荷を陽極に供与して酸素ガスを放出する。The oxygen ions dissolved in the treated water give a negative charge to the anode and release oxygen gas.
【００３１】更に処理水中の水酸イオンも陽極に引き寄
せられ、 ４ＯＨ-→２Ｈ2Ｏ＋Ｏ2↑ となって酸素ガスを放出し、この酸素及び前記酸素によ
り水中に溶解している有機物が酸化分解されることとな
る。Further, the hydroxyl ions in the treated water are also attracted to the anode, and 4OH − → 2H 2 O + O 2な っ て is released to release oxygen gas. The oxygen and the organic substances dissolved in the water are oxidized and decomposed by the oxygen. The Rukoto.
【００３２】前記電極５、５…のうち陰極では、処理水
中のアンモニウムイオン、カリウムイオン及びナトリウ
ムイオン等が引き寄せられるが、それらは水に対する溶
解度が大きいので該陰極に析出することなくイオンのま
まにとどまり、他方、陰極に引き付けられたイオンのう
ち水素イオンは、 ２Ｈ+＋２ｅ-→Ｈ2↑ のように陰電荷を附与されて水素ガスを生成させる。At the cathode among the electrodes 5, 5,..., Ammonium ions, potassium ions, sodium ions, and the like in the treated water are attracted. However, since they have high solubility in water, they do not precipitate on the cathode and remain as ions. On the other hand, among the ions attracted to the cathode, hydrogen ions are given a negative charge such as 2H + + 2e − → H 2て to generate hydrogen gas.
【００３３】なお以上に於いて、また前記散気管６ａか
らブロワー１１からのエアが噴出され、処理水の撹拌作
用が行なわれていることにより、燐酸イオンその他のイ
オンが処理水中で均一に分散され、それらの偏在により
生じることのある過電流の発生が妨げられ、常時適切な
電流が流れ、溶出鉄イオンの量を燐酸イオンの量に対し
て若干過剰な程度の量に保持することができるものであ
る。また燐酸イオンと鉄イオンとの結合物である燐酸鉄
のフロックの浮上を妨げ、均一な分散を生じさせること
により、処理水中のその他の固形成分をそれらのフロッ
クに付着結合させることができるものでもある。In the above, air from the blower 11 is blown out from the air diffuser 6a and the agitation of the treated water is performed, so that phosphate ions and other ions are uniformly dispersed in the treated water. , Which can prevent the occurrence of overcurrent which may be caused by their uneven distribution, always allow an appropriate current to flow, and maintain the amount of eluted iron ions in a slightly excessive amount with respect to the amount of phosphate ions. It is. Further, by preventing the floating of iron phosphate flocs, which are a combination of phosphate ions and iron ions, and by causing uniform dispersion, other solid components in the treated water can be adhered to those flocs. is there.
【００３４】更に前記板状吸着材４、４…は、必要な過
剰溶出分を越える過剰溶出鉄を吸着して処理水中への必
要以上の残存量を減少させる作用を果たしているもので
ある。Further, the plate-shaped adsorbents 4, 4,... Function to adsorb excessively eluted iron in excess of the required excessively eluted amount and reduce the amount of residual iron in the treated water more than necessary.
【００３５】こうして燐酸性燐の除去された処理水は次
の曝気滅菌槽７に移され、この曝気滅菌槽７では次の作
用が行なわれる。前記滅菌筒１３から滅菌剤が処理水中
に投入され、該滅菌剤により該処理水の滅菌作用が行な
われ、かつ該処理水中に溶解残存している過剰な溶出鉄
が該滅菌剤により酸化物として析出される。The treated water from which the phosphoric acid phosphorus has been removed is transferred to the next aeration sterilization tank 7, where the following operation is performed. A sterilizing agent is introduced into the treated water from the sterilizing cylinder 13, the sterilizing agent performs a sterilizing action of the treated water, and excessive dissolved iron remaining dissolved in the treated water is converted into an oxide by the sterilizing agent. Is deposited.
【００３６】また滅菌剤であるトリクロロイソシアヌー
ル酸の加水分解により生成した次亜塩素酸とアンモニウ
ムイオンとが、 ＮＨ4 +＋ＨＣｌＯ→ＮＨ2Ｃｌ＋Ｈ2Ｏ＋Ｈ+ ＮＨ2Ｃｌ＋ＨＣｌＯ→ＮＨＣｌ2＋Ｈ2Ｏ ２ＮＨ2Ｃｌ＋ＨＣｌＯ→Ｎ2＋Ｈ2Ｏ＋３ＨＣｌ ＮＨ2Ｃｌ＋ＮＨＣｌ2→Ｎ2＋ＨＣｌ ＮＨ2Ｃｌ＋Ｈ2Ｏ→ＮＨ2ＯＨ＋ＨＣｌ ２ＮＨ2ＯＨ＋ＨＣｌＯ→Ｎ2＋ＨＣｌ＋３Ｈ2Ｏ のように反応して最終的には、窒素ガス、塩酸及び水に
分解され、アンモニウム性の窒素が除去され、同時に、
前段の溶着槽６で上昇したpHをここで生成した上記塩酸
で中和することとなる。Hypochlorous acid and ammonium ions produced by the hydrolysis of trichloroisocyanuric acid as a sterilizing agent are converted into NH 4 + + HClO → NH 2 Cl + H 2 O + H + NH 2 Cl + HClO → NHCl 2 + H 2 O 2NH 2 Cl + HClO → N 2 + H 2 O + 3HCl NH 2 Cl + NHCl 2 → N 2 + HCl NH 2 Cl + H 2 O → NH 2 OH + HCl 2NH 2 OH + HClO → N 2 + HCl + 3H 2 O and finally nitrogen gas, hydrochloric acid and water And ammonium nitrogen is removed.
The pH increased in the first welding tank 6 is neutralized with the hydrochloric acid generated here.
【００３７】なおこの曝気滅菌槽７でも、散気管７ａか
らブロワー１１からのエアが処理水中に噴出され、該処
理水を撹拌しており、これにより、前段で生じた燐酸鉄
のフロックが処理水中で移動分散し、その間に前記溶出
鉄の酸化物フロックと接触付着し、凝集されることとな
る。また前記したように、滅菌剤と処理水中の前記各成
分との接触が良好になり、それらの各反応が良好に進展
することとなるものである。In this aeration sterilization tank 7 as well, air from the blower 11 is blown out from the blower 11 from the air diffuser 7a to agitate the treated water, so that the floc of iron phosphate generated in the preceding stage is removed from the treated water. At the same time, and in the meantime, it comes into contact with and adheres to the oxide flocs of the eluted iron and is aggregated. Further, as described above, the contact between the sterilizing agent and each of the components in the treated water is improved, and the respective reactions are favorably progressed.
【００３８】次に前記曝気滅菌槽７で処理された処理水
は次段の沈殿槽８に送り込まれ、この沈殿槽８では、次
の作用が行なわれる。即ち、前記燐酸鉄のフロック及び
酸化鉄フロック等の凝集物はここで沈殿させられ、その
沈殿物は汚泥濃縮槽９に引き抜かれ、上澄水は分離して
放流される。なお燐酸鉄のフロックは酸化鉄フロックと
付着凝集することで沈殿がスピーディに行なわれるよう
になる。[0038] Next, the process water the treated with aeration sterile tank 7 is fed to the next stage of the sedimentation tank 8, in the sedimentation tank 8, the next action is performed. That is, aggregates such as the iron phosphate flocs and iron oxide flocs are precipitated here, and
The sediment is pulled out to the sludge concentration tank 9, and the supernatant water is separated and discharged. The floc of iron phosphate adheres to and coagulates with the floc of iron oxide, so that precipitation can be performed quickly.
【００３９】汚泥濃縮槽９に引き抜かれた沈殿物は更に
脱水機１０で脱水され、その固形成分は汚泥として搬出
され、水分は前記調整槽１に返送される。The sediment drawn out to the sludge thickening tank 9 is further dewatered by a dewatering machine 10, its solid component is carried out as sludge, and the moisture is returned to the adjusting tank 1.
【００４０】次に以上の漬物工場排水の浄化システムの
運転結果を以下に示す。Next, the operation results of the above-mentioned pickling plant wastewater purification system are shown below.
【００４１】[0041]
【表１】 [Table 1]
【００４２】[0042]
【表２】 [Table 2]
【００４３】したがって表１及び表２に示すように、非
常に短い処理時間で窒素及び燐の除去が良好に行なわれ
たものである。Therefore, as shown in Tables 1 and 2, nitrogen and phosphorus were successfully removed within a very short processing time.
【００４４】[0044]
【発明の効果】本発明によれば、滅菌剤以外の薬剤を用
いることなく、非常に短い処理時間で窒素及び燐の除去
を良好に行なうことができるものである。また以上のよ
うに溶着槽及び曝気滅菌槽に於ける作用が極めて効率的
に行なわれるので、各槽を極めてコンパクトにし得、ス
ペースの有効利用をすることができる。According to the present invention, nitrogen and phosphorus can be satisfactorily removed in a very short processing time without using a chemical other than a sterilizing agent. Further, since the operations in the welding tank and the aeration sterilizing tank are performed extremely efficiently as described above, each tank can be made extremely compact, and the space can be effectively used.
【００４５】また、メンテナンスとして電極及び吸着材
の交換が必要にはなるが、曝気手段によって処理水中の
イオンが均一に分散され、適切な電流が保持され、不要
な金属分の溶出が少ないので、前者の交換までの期間が
非常に長く、かつ後者も不要な金属溶出分の吸着がそれ
ほど多くならないので、やはり交換までの期間は長くな
る。In addition, although replacement of the electrode and the adsorbent is required for maintenance, the ions in the treated water are uniformly dispersed by the aeration means, an appropriate current is maintained, and the elution of unnecessary metal components is small. Since the former period is very long and the latter does not increase the amount of unnecessary metal elution so much, the period until the exchange is also long.
【図１】本発明の排水中の窒素及び燐の除去装置の一実
施例を組み込んだ漬物工場排水の浄化システムのシステ
ム構成図。FIG. 1 is a system configuration diagram of a purification system for pickle factory wastewater incorporating an embodiment of the apparatus for removing nitrogen and phosphorus in wastewater of the present invention.
【図２】板状吸着材と電極との配置状態を示す説明図。FIG. 2 is an explanatory view showing an arrangement state of a plate-shaped adsorbent and electrodes.
１ 調整槽 １ａ ポンプ １ｂ 散気管 ２ 計量槽 ３ 生物処理槽 ３ａ 嫌気槽 ３ｂ 第１好気槽 ３ｃ 第２好気槽 ３ｄ 返送用のポンプ ３ｅ 接触材 ３ｆ 循環ポンプ ３ｇ エアレータ ４ 板状吸着材 ５ 電極 ６ 溶着槽 ６ａ 散気管 ７ 曝気滅菌槽 ７ａ 散気管 ８ 沈殿槽 ９ 汚泥濃縮槽 １０ 脱水機 １１ ブロワー １２ 給電装置 １３ 滅菌筒DESCRIPTION OF SYMBOLS 1 Adjustment tank 1a Pump 1b Air diffuser 2 Measuring tank 3 Biological treatment tank 3a Anaerobic tank 3b 1st aerobic tank 3c 2nd aerobic tank 3d Pump for return 3e Contact material 3f Circulating pump 3g Aerator 4 Plate adsorbent 5 Electrode Reference Signs List 6 welding tank 6a diffuser pipe 7 aeration sterilizer tank 7a diffuser pipe 8 sedimentation tank 9 sludge concentration tank 10 dehydrator 11 blower 12 power supply device 13 sterilization cylinder
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０２Ｆ 1/463 Ｃ０２Ｆ 1/50 ５１０Ａ 1/465 ５２０Ｂ 1/50 ５１０ ５２０Ｐ ５２０ ５３１Ｐ ５３２Ｈ ５３１ ５５０Ｂ ５３２ ５６０Ｂ ５５０ ５６０Ｆ ５６０ ５６０Ｈ 1/58 Ｐ Ｒ 1/58 1/46 １０２ (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 9/00 501 - 504 C02F 1/461 - 1/465 C02F 1/50 510 - 560 C02F 1/58,1/76 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification code FI C02F 1/463 C02F 1/50 510A 1/465 520B 1/50 510 520P 520 531P 532H 531 550B 532 560B 550 560F 560 560H 1/58 PR 1/58 1/46 102 (58) Field surveyed (Int. Cl. 7 , DB name) C02F 9/00 501-504 C02F 1/461-1/465 C02F 1/50 510-560 C02F 1 / 58,1 / 76
Claims (9)
溶着槽と、その処理水を更に処理する曝気滅菌槽と、そ
の処理水を受け取って固形成分を沈殿させる沈殿槽とで
構成した排水中の窒素及び燐の除去装置であって、 前記溶着槽には、一部を陽極に残部を陰極にすべく電源
を接続した複数の電極であって、少なくとも陽極となる
それを水中に溶出する溶出用金属で構成した複数の電極
と、その複数の電極間に介在させる吸着材であって、多
孔質セラミックで構成した吸着材と、処理水を撹拌する
ための撹拌用の曝気手段とを配し、 前記曝気滅菌槽には、処理水の滅菌作用を行ない、処理
水中に溶け出している溶出金属を酸化し、かつ少なくと
も処理水中で次亜塩素酸を生成する滅菌剤を該処理水中
に投入する滅菌剤投入手段と、処理水を撹拌する曝気手
段とを配することとし、 前記溶着槽では、導入された燐酸性燐及びアンモニア性
窒素を含む排水中で、 前記電極のうち陽極では陰イオンが引き寄せられ、その
うちの燐酸イオンは該陽極から溶出する溶出金属イオン
とイオン結合し、かつ水酸イオンは陽極に陰電荷を供与
して水及び酸素となり、この酸素により排水中の有機物
が酸化分解され、 他方、前記電極のうち陰極では陽イオンが引き寄せら
れ、そのうちの水素イオンは、陰電荷を受け取って水素
ガスとなり、この水素ガスの付着により浮上しようとす
る前記燐酸イオンと溶出金属イオンとのイオン結合物の
フロック、及び排水中で電極間に大きな電流を流すこと
となるような偏在の生じたイオンのそれぞれを、前記撹
拌用の曝気手段から噴出するエアにより撹拌して水中に
分散させ、 かつ前記多孔質セラミックの吸着材により、過剰溶出金
属を吸着して排水中への溶出残存量を減少させ、 次の曝気滅菌槽では、前記溶着槽から流入した処理水中
に前記滅菌剤の投入手段から滅菌剤を投入し、 上記滅菌剤により該処理水の滅菌を行なうとともに、溶
解している溶出金属を酸化物として析出させてフロック
化させ、 同時に、溶着槽で陰極に析出せず、イオンのまま残った
アンモニウムイオンが滅菌剤の処理水への投入によって
生成した次亜塩素酸と反応して、最終的には、窒素ガ
ス、水、塩酸に分解されて、アンモニア性の窒素が除去
され、同時に溶着槽で上昇した処理水のｐＨを、ここで
生成した塩酸で中和し、 更に次の沈殿槽では、前記イオン結合物のフロック及び
溶出金属の酸化物フロックを沈殿させ、生じた沈殿物を
系外に引き抜き、上澄水を分離して放流するように構成
した排水中の窒素及び燐の除去装置。1. A wastewater comprising a welding tank for introducing wastewater therein and performing a predetermined treatment, an aeration sterilization tank for further treating the treated water, and a sedimentation tank for receiving the treated water to precipitate solid components. An apparatus for removing nitrogen and phosphorus therein, wherein a plurality of electrodes connected to a power source so that a part of the welding tank is an anode and the remaining part is a cathode, and at least the electrode serving as the anode is eluted in water. A plurality of electrodes composed of a metal for elution, an adsorbent interposed between the plurality of electrodes, the adsorbent composed of a porous ceramic, and aeration means for stirring for stirring the treated water are arranged. In the aeration sterilization tank, a sterilizing agent that performs a sterilizing action of the treated water, oxidizes the eluted metal dissolved in the treated water, and generates at least hypochlorous acid in the treated water is charged into the treated water. Sterilizing agent injection means and the treated water In the welding tank, an anion is attracted to an anode of the electrode, and a phosphate ion of the anode is attracted to the anode in the wastewater containing the introduced phosphoric phosphorus and ammoniacal nitrogen. The hydroxide ions ionically bind to the metal ions eluted from the water, and the hydroxyl ions donate a negative charge to the anode to become water and oxygen, and this oxygen oxidizes and decomposes the organic matter in the wastewater. The ions are attracted, and among them, the hydrogen ions receive a negative charge to become hydrogen gas, and flocs of the ion combination of the phosphate ions and the eluted metal ions that are about to float by the attachment of the hydrogen gas, and the electrode in the wastewater. Each of the ions that are unevenly distributed so as to cause a large current to flow between them is stirred by air ejected from the aeration means for stirring to form a water stream. And the excess eluting metal is adsorbed by the porous ceramic adsorbent to reduce the amount of elution remaining in the wastewater. In the next aeration sterilization tank, the sterilization is performed in the treated water flowing from the welding tank. A sterilizing agent is introduced from the dispensing means, and the treated water is sterilized with the sterilizing agent. At the same time, the dissolved eluting metal is precipitated as an oxide to form flocs, and at the same time, is deposited on a cathode in a welding tank. The ammonium ions remaining as ions react with hypochlorous acid generated by charging the sterilizing agent into the treated water, and are eventually decomposed into nitrogen gas, water, and hydrochloric acid, and the ammoniacal nitrogen There are removed, the pH of the treated water was increased in weld bath simultaneously, and neutralized with here generated hydrochloric, further in the following sedimentation tank to precipitate the oxide floc floc and elution metal of the ionic conjugate, Flip precipitate withdrawal from the system, apparatus for removing nitrogen and phosphorus in the waste water that is configured to discharge by separating the supernatant water.
溶着槽と、その処理水を更に処理する曝気滅菌槽と、そ
の処理水を受け取って固形成分を沈殿させる沈殿槽とで
構成した排水中の窒素及び燐の除去装置であって、 前記溶着槽には、一部を陽極に残部を陰極にすべく電源
を接続した複数の電極であって、少なくとも陽極となる
それを水中に溶出する溶出用金属で構成した複数の電極
と、その複数の電極間に介在させる吸着材であって、多
孔質セラミックで構成した吸着材と、処理水を撹拌する
ための撹拌用の曝気手段とを配し、 前記曝気滅菌槽には、少なくとも処理水中に溶け出して
いる溶出金属を酸化する酸化剤及び次亜塩素酸をその成
分として含む滅菌剤を該処理水中に投入する滅菌剤投入
手段と、処理水を撹拌する曝気手段とを配することと
し、 前記溶着槽では、導入された燐酸性燐及びアンモニア性
窒素を含む排水中で、 前記電極のうち陽極では陰イオンが引き寄せられ、その
うちの燐酸イオンは該陽極から溶出する溶出金属イオン
とイオン結合し、かつ水酸イオンは陽極に陰電荷を供与
して水及び酸素となり、この酸素により排水中の有機物
が酸化分解され、 他方、前記電極のうち陰極では陽イオンが引き寄せら
れ、そのうちの水素イオンは、陰電荷を受け取って水素
ガスとなり、この水素ガスの付着により浮上しようとす
る燐酸イオンと溶出金属イオンとのイオン結合物のフロ
ック、及び排水中で電極間に大きな電流を流すこととな
るような偏在の生じたイオンのそれぞれを、前記撹拌用
の曝気手段から噴出するエアにより撹拌して水中に分散
させ、 かつ前記多孔質セラミックの吸着材により、過剰溶出金
属を吸着して排水中への溶出残存量を減少させ、 次の曝気滅菌槽では、前記溶着槽から流入した処理水中
に前記滅菌剤の投入手段から滅菌剤を投入し、 上記滅菌剤により該処理水の滅菌を行なうとともに、溶
解している溶出金属を酸化物として析出させてフロック
化させ、 同時に、溶着槽で陰極に析出せず、イオンのまま残った
アンモニウムイオンが滅菌剤の成分である次亜塩素酸と
反応して、最終的には、窒素ガス、水、塩酸に分解され
て、アンモニア性の窒素が除去され、同時に溶着槽で上
昇した処理水のｐＨを、ここで生成した塩酸で中和し、 更に次の沈殿槽では、前記イオン結合物のフロック及び
溶出金属の酸化物フロックを沈殿させ、生じた沈殿物を
系外に引き抜き、上澄水を分離して放流するように構成
した排水中の窒素及び燐の除去装置。2. A wastewater comprising a welding tank for guiding wastewater therein and performing predetermined treatment, an aeration sterilization tank for further treating the treated water, and a sedimentation tank for receiving the treated water to precipitate solid components. An apparatus for removing nitrogen and phosphorus therein, wherein a plurality of electrodes connected to a power source so that a part of the welding tank is an anode and the remaining part is a cathode, and at least the electrode serving as the anode is eluted in water. A plurality of electrodes composed of a metal for elution, an adsorbent interposed between the plurality of electrodes, the adsorbent composed of a porous ceramic, and aeration means for stirring for stirring the treated water are arranged. The aeration sterilization tank has a sterilizing agent introducing means for introducing a sterilizing agent containing at least an oxidizing agent for oxidizing an eluted metal dissolved in the processing water and hypochlorous acid into the processing water, Provide aeration means for stirring water. In the welding tank, in the wastewater containing the introduced phosphoric acid phosphorus and ammoniacal nitrogen, anions are attracted to the anode of the electrodes, and phosphate ions of which are eluted metal ions eluted from the anode. Hydrogen ions donate a negative charge to the anode to form water and oxygen, and the oxygen oxidizes and decomposes organic matter in the wastewater, while cations are attracted to the cathode of the electrode, and Hydrogen ions receive negative charges and become hydrogen gas, and flocs of ionic bonds between phosphate ions and metal ions eluted by the adhesion of the hydrogen gas, and a large current flows between the electrodes in the wastewater Each of the ions that are unevenly distributed such that the ions are agitated by air jetted from the aeration means for agitation and dispersed in water, and The adsorbent of the porous ceramic adsorbs the excessively eluted metal to reduce the amount of elution remaining in the wastewater. In the next aeration sterilization tank, the sterilizing agent is introduced from the means for introducing the sterilizing agent into the treated water flowing from the welding tank. And disinfecting the treated water with the above sterilizing agent, and dissolving the dissolved eluting metal as an oxide to form flocs. At the same time, ions were not deposited on the cathode in the welding tank and remained as ions. Ammonium ions react with hypochlorous acid, which is a component of the sterilizing agent, and are eventually decomposed into nitrogen gas, water, and hydrochloric acid to remove ammonia nitrogen, and at the same time, treated water that has risen in the welding tank. Is neutralized with the hydrochloric acid generated here. Further, in the next sedimentation tank, the floc of the ion-bonded substance and the oxide floc of the eluted metal are precipitated, the generated precipitate is drawn out of the system, and the supernatant water is removed. Separate Apparatus for removing nitrogen and phosphorus in the configuration the waste water so as to discharge.
レス製の板状部材で構成し、陰極となるそれをカーボン
製の板状部材で構成した請求項１又は２の排水中の窒素
及び燐の除去装置。3. The nitrogen and phosphorus in the wastewater according to claim 1, wherein the anode serving as the anode among the electrodes is formed of a stainless plate member, and the cathode serving as the cathode is formed of a carbon plate member. Removal equipment.
し、その電圧を３Ｖとした請求項１又は２の排水中の窒
素及び燐の除去装置。4. The apparatus for removing nitrogen and phosphorus in waste water according to claim 1, wherein a power supply connected to the electrode is a DC power supply, and the voltage is 3 V.
し、その電圧を溶着槽に導入される排水中の燐酸性燐の
濃度に比例して昇降させることとした請求項１又は２の
排水中の窒素及び燐の除去装置。5. The wastewater according to claim 1, wherein a power supply connected to the electrode is a DC power supply, and the voltage is raised and lowered in proportion to the concentration of phosphoric acid phosphorus in the wastewater introduced into the welding tank. Nitrogen and phosphorus removal equipment.
クの２〜７ｍｍの粒度の粉砕物とガラス粉とベントナイ
ト粉との混練物を成形して焼成した請求項１又は２の排
水中の窒素及び燐の除去装置。6. The nitrogen in waste water according to claim 1 or 2, wherein said adsorbent is formed by molding a kneaded product of a crushed ceramic having a particle size of 2 to 7 mm, a glass powder and a bentonite powder of a ceramic obtained by firing clay. And a device for removing phosphorus.
電極間に配した請求項１又は２の排水中の窒素及び燐の
除去装置。7. The apparatus for removing nitrogen and phosphorus in waste water according to claim 1, wherein the adsorbent is formed in a plate shape and arranged between the plurality of electrodes.
えた板状に構成し、前記電極を上記空隙部に挿入した請
求項１又は２の排水中の窒素及び燐の除去装置。8. The apparatus for removing nitrogen and phosphorus in wastewater according to claim 1, wherein the adsorbent is formed in a plate shape having a space for electrode insertion, and the electrode is inserted into the space.
ヌール酸を採用した請求項１の排水中の窒素及び燐の除
去装置。9. The apparatus for removing nitrogen and phosphorus in wastewater according to claim 1, wherein trichloroisocyanuric acid is used as said sterilizing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07344795A JP3117396B2 (en) | 1995-12-06 | 1995-12-06 | Equipment for removing nitrogen and phosphorus from wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07344795A JP3117396B2 (en) | 1995-12-06 | 1995-12-06 | Equipment for removing nitrogen and phosphorus from wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09155392A JPH09155392A (en) | 1997-06-17 |
| JP3117396B2 true JP3117396B2 (en) | 2000-12-11 |
Family
ID=18372053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07344795A Expired - Fee Related JP3117396B2 (en) | 1995-12-06 | 1995-12-06 | Equipment for removing nitrogen and phosphorus from wastewater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3117396B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114853122B (en) * | 2022-05-09 | 2023-08-04 | 河北工业大学 | A method for treating groundwater with magnetically assembled electrodes and peroxygen flocculation technology |
| CN119612870B (en) * | 2025-01-07 | 2025-08-29 | 武汉兴达高技术工程有限公司 | Ammonia nitrogen wastewater treatment system |
-
1995
- 1995-12-06 JP JP07344795A patent/JP3117396B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09155392A (en) | 1997-06-17 |
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