JPH0687942B2 - Biological deodorization method for odorous components - Google Patents
Biological deodorization method for odorous componentsInfo
- Publication number
- JPH0687942B2 JPH0687942B2 JP63122814A JP12281488A JPH0687942B2 JP H0687942 B2 JPH0687942 B2 JP H0687942B2 JP 63122814 A JP63122814 A JP 63122814A JP 12281488 A JP12281488 A JP 12281488A JP H0687942 B2 JPH0687942 B2 JP H0687942B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- sludge
- activated sludge
- biological treatment
- iron
- 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
- 238000000034 method Methods 0.000 title claims description 48
- 238000004332 deodorization Methods 0.000 title claims description 12
- 239000010802 sludge Substances 0.000 claims description 123
- 238000011282 treatment Methods 0.000 claims description 88
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 45
- 239000000701 coagulant Substances 0.000 claims description 44
- 229910052742 iron Inorganic materials 0.000 claims description 40
- 239000002351 wastewater Substances 0.000 claims description 31
- 239000007789 gas Substances 0.000 claims description 29
- 230000001877 deodorizing effect Effects 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 238000005273 aeration Methods 0.000 description 20
- 238000005345 coagulation Methods 0.000 description 18
- 230000015271 coagulation Effects 0.000 description 18
- 239000010800 human waste Substances 0.000 description 9
- 238000010790 dilution Methods 0.000 description 8
- 239000012895 dilution Substances 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 description 4
- WQOXQRCZOLPYPM-UHFFFAOYSA-N dimethyl disulfide Chemical compound CSSC WQOXQRCZOLPYPM-UHFFFAOYSA-N 0.000 description 4
- -1 iron ions Chemical class 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- 208000005156 Dehydration Diseases 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 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
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 229920006317 cationic polymer Polymers 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 239000010812 mixed waste Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 150000003464 sulfur compounds Chemical class 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- VGPSUIRIPDYGFV-UHFFFAOYSA-N [N].O[N+]([O-])=O Chemical compound [N].O[N+]([O-])=O VGPSUIRIPDYGFV-UHFFFAOYSA-N 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 229920006318 anionic polymer Polymers 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 230000007102 metabolic function Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ この発明は、各種工場、下水処理、し尿処理、産業廃水
処理等の施設から排出されるガスの脱臭方法に関し、特
に微生物の塊である活性汚泥を利用した生物脱臭方法に
関するものである。The present invention relates to a method for deodorizing gas discharged from facilities such as various factories, sewage treatment, human waste treatment, industrial wastewater treatment, and the like. The present invention relates to a biological deodorizing method using sludge.
＜従来の技術＞ 多くの微生物は、悪臭成分を含む有機物や無機物を栄養
源として摂取し、それらを分解してエネルギーを得てお
り、これらの微生物は土壌中や廃水中に極めて多く存在
する。近年、省資源、省エネルギーおよび省力化の面か
ら、微生物の塊である活性汚泥の代謝機能を利用し、ア
ンモニア、硫化水素、メチルメルカプタン、硫化メチ
ル、二硫化メチルなどの悪臭成分を脱臭する生物脱臭法
が見直されている。<Prior Art> Many microorganisms ingest organic and inorganic substances containing malodorous components as nutrient sources and decompose them to obtain energy, and these microorganisms are extremely present in soil and wastewater. In recent years, from the viewpoint of resource saving, energy saving, and labor saving, biological deodorization that utilizes the metabolic function of activated sludge, which is a mass of microorganisms, to deodorize offensive odor components such as ammonia, hydrogen sulfide, methyl mercaptan, methyl sulfide, and methyl disulfide. The law is being reviewed.
かような脱臭方法は大別すると、曝気槽（生物処理槽）
内で臭気成分を除去する方法（特開昭50-8774号公報、
特開昭50-116368号公報、特開昭52-63862号公報、特開
昭52-65975号公報、特開昭52-153876号公報等）と、気
液接触塔（洗浄塔、吸収塔等）で臭気成分を除去する方
法（特公昭47-40279号公報、特開昭48-27968号公報、特
開昭49-61062号公報、特開昭52-4654号公報、特開昭52-
155175号公報、特開昭57-49455号公報等）とがある。Such deodorizing methods are roughly classified into aeration tanks (biological treatment tanks).
Method for removing odorous components in the chamber (Japanese Patent Laid-Open No. 50-8774,
JP-A-50-116368, JP-A-52-63862, JP-A-52-65975, JP-A-52-153876, etc.) and gas-liquid contact tower (washing tower, absorption tower, etc.) ) To remove odorous components (JP-B-47-40279, JP-A-48-27968, JP-A-49-61062, JP-A-52-4654, JP-A-52-54)
155175 and JP-A-57-49455).
すなわち、曝気槽（生物処理槽）内で臭気成分を除去す
る方法は、第６図に示したように、ブロワにより曝気槽
内へ送入された臭気成分を含むガスは、散気管から細か
い気泡となって槽内の活性汚泥液中に吹き込まれる。か
くして、活性汚泥により臭気成分は分解あるいは吸着処
理され、処理ガスは槽上方から排気される。That is, as shown in FIG. 6, the method of removing the odorous components in the aeration tank (biological treatment tank) is such that the gas containing the odorous components sent into the aeration tank by the blower has fine bubbles from the diffuser pipe. And is blown into the activated sludge liquid in the tank. Thus, the odorous components are decomposed or adsorbed by the activated sludge, and the treated gas is exhausted from above the tank.
また、気液接触塔（洗浄塔、吸収塔等）で臭気成分を除
去する方法は、第７図に示したように、ブロワにより気
液接触塔内へ送入された臭気成分を含むガスは、塔内の
充填材層中を上昇し、一方、ノズルから散布された活性
汚泥液は充填材層中を下降し、その間にガスと活性汚泥
液とが接触する。かくして、ガス中の臭気成分は活性汚
泥により分解あるいは吸着処理され、処理ガスは塔頂部
の排気筒から排気される。Moreover, as shown in FIG. 7, the method of removing the odorous components in the gas-liquid contact tower (washing tower, absorption tower, etc.) is as follows. , Rises in the packing material layer in the tower, while the activated sludge liquid sprayed from the nozzle descends in the packing material layer, during which the gas and the activated sludge liquid come into contact with each other. Thus, the odorous components in the gas are decomposed or adsorbed by the activated sludge, and the treated gas is exhausted from the exhaust pipe at the top of the tower.
活性汚泥によって臭気成分を吸着または分解させて悪臭
の生物脱臭を行うこれらの従来方法は、それなりに効果
を有するものである。These conventional methods of adsorbing or decomposing odorous components by activated sludge to perform biological deodorization of malodors have some effects.
ところで、下水、し尿、産業廃水等の処理においては、
凝集剤が多用されている。例えば、凝集浮上、凝集沈澱
等の凝集処理や汚泥脱水等の汚泥処理が挙げられる。By the way, in the treatment of sewage, night soil, industrial wastewater, etc.
A coagulant is often used. Examples include coagulation flotation, coagulation sedimentation and other coagulation treatments, and sludge dewatering and other sludge treatments.
＜発明が解決しようとする課題＞ 凝集剤を使用する凝集処理や脱水処理の結果生ずる凝集
汚泥や汚泥脱水分離液には、凝集剤成分がかなり含まれ
ている。このことに着目し、本発明者は凝集剤の当初の
目的を果たした後の凝集剤成分の有効利用を検討した。
種々検討する中で、凝集剤成分の有効利用として数種類
の凝集剤で凝集処理した凝集汚泥や汚泥脱水分離液を活
性汚泥と混合して臭気成分を含むガスと接触させたとこ
ろ、凝集剤として鉄系凝集剤を使用したものは、上述し
た活性汚泥による悪臭の除去率をさらに向上できること
を見出だし、この発明を完成させたものである。<Problems to be Solved by the Invention> A coagulant component is considerably contained in the coagulated sludge and the sludge dewatering separated liquid produced as a result of the coagulation treatment and the dehydration treatment using the coagulant. With this in mind, the present inventor has examined the effective use of the coagulant component after achieving the original purpose of the coagulant.
In various studies, when coagulating sludge coagulated with several kinds of coagulants as effective use of coagulant components and sludge dewatering separation liquid were mixed with activated sludge and brought into contact with gas containing odorous components, iron as coagulant was obtained. It was found that the use of the system flocculant can further improve the removal rate of the malodor caused by the above-mentioned activated sludge, and completed the present invention.
＜課題を解決するための手段＞ すなわちこの発明は、臭気成分を含むガスを、廃水の生
物処理に用いている鉄系凝集剤を含有する活性汚泥混合
水と接触させて臭気成分を除去し、かつ活性汚泥混合水
により廃水の生物処理を行うことを特徴とする臭気成分
の生物脱臭方法である。接触させる方法としては、臭気
成分を含む酸素含有ガスを、廃水の生物処理槽内の鉄系
凝集剤を含有する活性汚泥混合水中に散気することによ
って、廃水の生物処理と臭気成分の生物脱臭とを生物処
理槽内で同時に行なうようにしてもよく、あるいは、廃
水の生物処理槽内の鉄系凝集剤を含有する活性汚泥混合
水を気液接触塔へ導入し、臭気成分を含むガスを気液接
触塔内でこの活性汚泥混合水と接触させて臭気成分を除
去した後、活性汚泥混合水を生物処理槽に循環させて廃
水の生物処理を行うようにしてもよい。<Means for Solving the Problems> That is, the present invention removes an odor component by bringing a gas containing an odor component into contact with activated sludge mixed water containing an iron-based coagulant used for biological treatment of wastewater, In addition, it is a biological deodorizing method for odorous components, characterized in that biological treatment of wastewater is carried out with activated sludge mixed water. As the method of contact, the oxygen-containing gas containing the odorous component is diffused into the activated sludge mixed water containing the iron-based coagulant in the biological treatment tank of the wastewater to perform biological treatment of the wastewater and biological deodorization of the odorous component. May be carried out simultaneously in the biological treatment tank, or the activated sludge mixed water containing the iron-based coagulant in the biological treatment tank of the waste water is introduced into the gas-liquid contact tower to remove gas containing odorous components. After contacting the activated sludge mixed water in the gas-liquid contact tower to remove odorous components, the activated sludge mixed water may be circulated to the biological treatment tank for biological treatment of the wastewater.
この発明で用いられる鉄系凝集剤を含有する活性汚泥混
合水としては、鉄系凝集剤を使用する汚泥の脱水処理の
結果生ずる汚泥脱水分離液を混合した生物処理に用いら
れる活性汚泥混合水や、鉄系凝集剤を使用する凝集沈
澱、凝集浮上等の凝集処理の結果生ずる凝集沈を混合し
た生物処理に用いられる活性汚泥混合水等が挙げられ
る。As the activated sludge mixed water containing the iron-based coagulant used in the present invention, the activated sludge mixed water used for biological treatment in which the sludge dewatered separated liquid resulting from the dehydration treatment of the sludge using the iron-based coagulant is mixed and Examples thereof include coagulation sedimentation using an iron-based coagulant, and activated sludge mixed water used for biological treatment in which coagulation sedimentation resulting from coagulation treatment such as coagulation floating is mixed.
鉄系凝集剤としては、従来から廃水処理等で用いられて
いるポリ硫酸第二鉄、塩化第二鉄、硫酸第一鉄、硫酸第
二鉄等が挙げられる。Examples of the iron-based coagulant include polyferric sulfate, ferric chloride, ferrous sulfate, ferric sulfate and the like which have been conventionally used in wastewater treatment and the like.
かような鉄系凝集剤を含んでいる活性汚泥混合水と臭気
成分を含むガスとを接触させることによって、臭気成分
が活性汚泥により吸着または分解されると共に、臭気物
質のうち特に硫化水素、二硫化メチル、硫化メチル、メ
ルカプタン等の硫黄化合物が凝集剤成分の鉄イオンの作
用により臭気成分のより一層効果的な除去が行われる。By contacting activated sludge mixed water containing such an iron-based coagulant with a gas containing an odorous component, the odorous component is adsorbed or decomposed by the activated sludge, and at the same time, among the odorous substances, particularly hydrogen sulfide, Sulfur compounds such as methyl sulfide, methyl sulfide, and mercaptan can remove odorous components more effectively by the action of iron ions as a coagulant component.
この発明方法において、臭気成分を含むガスと接触せし
める活性汚泥混合水の活性汚泥濃度（MLVSS）は、好ま
しくは1500〜35000mg/、さらに好ましくは3000〜8000
mg/とするのがよい。かような活性汚泥濃度は、各種
廃水の一般的な活性汚泥法処理方式における活性汚泥濃
度と同様な値である。In the method of the present invention, the activated sludge concentration (MLVSS) of the activated sludge mixed water which is brought into contact with a gas containing an odor component is preferably 1500 to 35000 mg /, more preferably 3000 to 8000.
It is good to use mg /. Such activated sludge concentration is the same value as the activated sludge concentration in the general activated sludge method of various wastewaters.
また、この活性汚泥混合水中の鉄系凝集剤濃度（Feイオ
ン濃度）は、鉄イオンが活性汚泥混合水中に少しでも存
在すればその存在量に応じてそれなりに臭気成分の除去
率が向上するが、好ましくは10mg/以上、さらに好ま
しくは30mg/以上の濃度である。In addition, the iron-based coagulant concentration (Fe ion concentration) in the activated sludge mixed water will improve the removal rate of odorous components depending on the amount of iron ions present in the activated sludge mixed water. The concentration is preferably 10 mg / or more, more preferably 30 mg / or more.
この発明方法を実施するに際しては、例えば第１図〜第
４図に示したような実施態様が考えられる。In carrying out the method of the present invention, for example, the embodiments shown in FIGS. 1 to 4 can be considered.
第１図に示す活性汚泥法処理方式は、汚泥の脱水処理に
鉄系凝集剤を使用するものである。この方式において
は、廃水を先ず前処理設備で処理して夾雑物を除去した
後、この廃水を調整槽で、沈澱槽からの返送汚泥および
脱水機からの脱水分離液と混合すると共に、必要により
希釈水で希釈する。かくして得られた活性汚泥混合水を
生物処理槽にて曝気した後、沈澱槽にて活性汚泥を沈降
させ、処理水と汚泥とに分離する。分離した汚泥の１部
は返送汚泥として希釈調整槽を経て生物処理槽へもど
し、他の１部は余剰汚泥として脱水機へ送る。この脱水
機で余剰汚泥に鉄系凝集剤を添加し、脱水汚泥と脱水分
離液とに分け、脱水分離液は希釈調整槽を経て生物処理
槽へ戻す。かような活性汚泥法処理方式では、脱水機で
添加した鉄系凝集剤の１部は脱水分離液と共に生物処理
槽へ導入されることになる。従って、この生物処理槽に
臭気成分を含む酸素含有ガスを散気することによって、
鉄系凝集剤の存在下で臭気成分と活性汚泥混合水との接
触がなされ、ここで臭気成分の生物脱臭がなされること
になる。特にこの実施例では、生物処理槽内で廃水の生
物処理と臭気成分の生物脱臭とを同時に行なえる利点が
ある。The activated sludge method treatment method shown in FIG. 1 uses an iron-based coagulant for dehydration treatment of sludge. In this method, the wastewater is first treated in a pretreatment facility to remove contaminants, and then this wastewater is mixed in a conditioning tank with the returned sludge from the settling tank and the dehydrated separated liquid from the dehydrator, and if necessary. Dilute with dilution water. The activated sludge mixed water thus obtained is aerated in the biological treatment tank, and then the activated sludge is allowed to settle in the settling tank to separate into treated water and sludge. One part of the separated sludge is returned as sludge to the biological treatment tank through the dilution adjustment tank, and the other part is sent to the dehydrator as excess sludge. An iron-based coagulant is added to the excess sludge by this dehydrator to separate it into a dehydrated sludge and a dehydrated separated liquid, and the dehydrated separated liquid is returned to the biological treatment tank through a dilution adjusting tank. In such an activated sludge method, one part of the iron-based coagulant added by the dehydrator is introduced into the biological treatment tank together with the dehydrated separated liquid. Therefore, by diffusing the oxygen-containing gas containing the odorous component into this biological treatment tank,
In the presence of the iron-based coagulant, the odorous component is brought into contact with the activated sludge mixed water, and the odorous component is biologically deodorized there. Particularly, in this embodiment, there is an advantage that biological treatment of wastewater and biological deodorization of odorous components can be simultaneously performed in the biological treatment tank.
この処理方式における脱水機での鉄系凝集剤使用量は、
脱水機へ導入される余剰汚泥の全固形物（蒸発残留物）
に対してFeイオンとして0.5〜５％、好ましくは１〜2.5
％である。例えば鉄系凝集剤としてポリ硫酸第二鉄を使
用した場合の使用量［／日］は次の式により求められ
る。The amount of iron-based coagulant used in the dehydrator in this treatment method is
Total solids of excess sludge introduced to the dehydrator (evaporation residue)
With respect to Fe ion 0.5 to 5%, preferably 1 to 2.5
%. For example, the amount [/ day] used when ferric polysulfate is used as the iron-based coagulant is calculated by the following formula.
｛汚泥の全固形物［Kg/日］×0.5〜５［重量％］｝／｛凝集剤の比重［Kg/］ ×凝集剤中の鉄分［重量％］（一般にFe3+が11.0重量％以上）｝ かような量の鉄系凝集剤を脱水機にて使用し、得られた
脱水分離液を生物処理層に導入すれば、流入する廃水に
対して０〜20倍の稀釈水を加えた場合でも、生物処理槽
での活性汚泥混合水の鉄系凝集剤濃度（Feイオン濃度）
は、この発明による臭気成分の生物脱臭方法を実施する
に適した値となる。{Total solids of sludge [Kg / day] x 0.5 to 5 [wt%]} / {Specific gravity of coagulant [Kg /] x Iron content in coagulant [wt%] (Generally Fe 3+ is 11.0 wt% or more) )} Using such an amount of iron-based coagulant in a dehydrator and introducing the dehydrated separated liquid thus obtained into the biological treatment layer, 0 to 20 times the diluted water was added to the inflowing wastewater. Even if the concentration of iron-based flocculant (Fe ion concentration) in the activated sludge mixed water in the biological treatment tank
Is a value suitable for carrying out the method for biodeodorizing odorous components according to the present invention.
なお、生物処理層に供給、散気される臭気成分を含む酸
素含有ガスは、通常は臭気成分と空気であるが、生物処
理槽の活性汚泥が所定の廃水浄化能力を発揮できる酸素
量が供給されなければならないことは言うまでもない。
臭気成分を含むガスと曝気用空気を別の系統からそれぞ
れ生物処理槽に供給、散気してもよい。The oxygen-containing gas containing the odorous component that is supplied and diffused to the biological treatment layer is usually the odorous component and air, but the amount of oxygen that enables the activated sludge in the biological treatment tank to exert a predetermined wastewater purification capacity is supplied. It goes without saying that it must be done.
The gas containing the odorous component and the aeration air may be supplied and diffused to the biological treatment tank from different systems.
第２図に示す活性汚泥法処理方式は、第１図の方式を１
部変形し、この発明による臭気成分の生物脱臭方法を実
施するための気液接触塔を別途設けたものである。すな
わち、生物処理槽には従来通り空気を供給し、臭気成分
を含むガスは気液接触塔の下部へ送入する。一方、廃水
の生物処理に用いている鉄系凝集剤を含有する活性汚泥
混合水は、生物処理槽から気液接触塔の上部へ供給さ
れ、塔内に配置された充填材層または棚段中を下降し、
この間に塔内を上昇してくる臭気成分を含むガスと接触
する。従って、この気液接触塔にて、鉄系凝集剤の存在
下で臭気成分と活性汚泥混合水との接触がなされ、臭気
成分の生物脱臭がなされることになる。臭気成分が除去
された処理ガスは気液接触塔の頂部から排気され、処理
後の活性汚泥混合水は生物処理槽に戻り再び廃水の生物
処理ん用いられる。The activated sludge method treatment method shown in FIG. 2 is the same as the method shown in FIG.
Partly modified, a gas-liquid contact tower for carrying out the biological deodorizing method for odorous components according to the present invention is separately provided. That is, air is conventionally supplied to the biological treatment tank, and the gas containing the odorous component is sent to the lower part of the gas-liquid contact tower. On the other hand, the activated sludge mixed water containing the iron-based coagulant used for biological treatment of wastewater is supplied from the biological treatment tank to the upper part of the gas-liquid contact tower, and the packing material layer or tray in the tower is placed inside the tower. Down,
During this period, the gas in the tower comes into contact with the gas containing odorous components. Therefore, in this gas-liquid contact tower, the odorous component is brought into contact with the activated sludge mixed water in the presence of the iron-based coagulant, and the odorous component is biologically deodorized. The treated gas from which the odorous components have been removed is exhausted from the top of the gas-liquid contact tower, and the treated activated sludge mixed water is returned to the biological treatment tank and used again for biological treatment of wastewater.
なお、気液接触塔における液／ガス比（L/G）は、３〜1
0の範囲が好ましい。The liquid / gas ratio (L / G) in the gas-liquid contact tower is 3 to 1
A range of 0 is preferred.
第３図の活性汚泥法処理方式は、廃水の凝集処理に鉄系
凝集剤を使用するものである。この方式においては、廃
水を前処理設備で処理した後、調整槽にて、沈澱槽から
の返送汚泥、凝集処理により生じた凝集汚泥、および脱
水機からの脱水分離液と混合すると共に必要により稀釈
水で稀釈する。かくして得られた活性汚泥混合水を生物
処理槽にて曝気した後、沈澱槽にて活性汚泥を沈降さ
せ、上澄水と汚泥とに分離する。分離した汚泥の１部は
返送汚泥として混合槽を経て生物処理槽へもどし、他の
１部は余剰汚泥として脱水機へ送る。沈澱槽からの上澄
水には鉄系凝集剤を添加して凝集処理を施し、上澄水中
に残留する汚泥をさらに凝集沈澱させると共に、凝集処
理を施した上澄水を処理水として排出する。ここで得ら
れた凝集汚泥を調整槽および／または脱水機へ送り、脱
水機ではこの凝集汚泥と余剰汚泥とを脱水して脱水汚泥
と脱水分離液とに分け、脱水分離液は調整槽を経て生物
処理槽へ戻す。かような活性汚泥法処理方式では、凝集
処理で使用した鉄系凝集剤は、主として凝集汚泥と共に
生物処理槽へ導入されることになる。従って第１図に示
した実施態様と同様に、この生物処理槽に臭気成分を含
む空気を散気することによって、鉄系凝集剤の存在下で
臭気成分と活性汚泥混合水との接触がなされ、ここで臭
気成分の生物脱臭がなされることになる。The activated sludge method treatment method of FIG. 3 uses an iron-based coagulant for the coagulation treatment of wastewater. In this method, after treating the wastewater with a pretreatment facility, it is mixed with the sludge returned from the settling tank, the coagulated sludge generated by the coagulation treatment, and the dehydrated separated liquid from the dehydrator in the adjusting tank and diluted if necessary. Dilute with water. The activated sludge mixed water thus obtained is aerated in a biological treatment tank, and then the activated sludge is allowed to settle in a sedimentation tank to separate into supernatant water and sludge. One part of the separated sludge is returned as sludge to the biological treatment tank through the mixing tank, and the other part is sent to the dehydrator as excess sludge. An iron-based coagulant is added to the supernatant water from the settling tank to perform coagulation treatment to further coagulate and settle the sludge remaining in the supernatant water, and the coagulation-treated supernatant water is discharged as treated water. The coagulated sludge obtained here is sent to a conditioning tank and / or a dehydrator, where the coagulated sludge and excess sludge are dewatered to be separated into dehydrated sludge and dehydrated separated liquid, and the dehydrated separated liquid is passed through the conditioning tank. Return to biological treatment tank. In such an activated sludge method, the iron-based coagulant used in the coagulation treatment is mainly introduced into the biological treatment tank together with the coagulated sludge. Therefore, similar to the embodiment shown in FIG. 1, by aerating the air containing the odorous component into this biological treatment tank, the odorous component and the activated sludge mixed water are brought into contact with each other in the presence of the iron-based coagulant. , Here, the biological deodorization of the odor component will be performed.
この活性汚泥法処理方式における廃水の凝集処理での鉄
系凝集剤使用量はFeイオンとして10〜500mg/廃水、好
ましくは50〜120mg/廃水である。かような量の鉄系凝
集剤を凝集処理で使用し、得られた凝集汚泥を生物処理
槽に導入すれば、生物処理槽での活性汚泥混合水の鉄系
凝集剤濃度（Feイオン濃度）は、この発明による臭気成
分の生物脱臭方法を実施するに適した値となる。The amount of iron-based coagulant used in the coagulation treatment of wastewater in this activated sludge method is 10 to 500 mg / wastewater, preferably 50 to 120 mg / wastewater as Fe ions. If such an amount of iron-based coagulant is used in the coagulation treatment and the resulting coagulated sludge is introduced into the biological treatment tank, the iron-based coagulant concentration (Fe ion concentration) of the activated sludge mixed water in the biological treatment tank Is a value suitable for carrying out the method for biodeodorizing odorous components according to the present invention.
なお、第３図における活性汚泥法処理方式においても第
１図に示した処理方式と同様に、生物処理槽に供給、散
気される臭気成分を含む酸素含有ガスは、通常は臭気成
分と空気であるが、生物処理槽の活性汚泥が所定の廃水
浄化能力を発揮できる酸素量が供給されなければならな
いことは言うまでもない。臭気成分を含むガスと曝気用
空気を別の系統からそれぞれ生物処理槽に供給、散気し
てもよい。In the activated sludge treatment method shown in FIG. 3, as in the treatment method shown in FIG. 1, the oxygen-containing gas containing the odorous components supplied to the biological treatment tank and diffused is usually odorous components and air. However, it goes without saying that the activated sludge in the biological treatment tank must be supplied with an oxygen amount capable of exhibiting a predetermined wastewater purification capacity. The gas containing the odorous component and the aeration air may be supplied and diffused to the biological treatment tank from different systems.
第４図に示す活性汚泥法処理方式は、第３図の方式を１
部変形し、この発明による臭気成分の生物脱臭方法を実
施するための気液接触塔を別途設けたものである。この
気液接触塔は、第２図に示した気液接触塔と全く同じで
あるため説明を省略する。The activated sludge method treatment method shown in FIG. 4 is the same as the method shown in FIG.
Partly modified, a gas-liquid contact tower for carrying out the biological deodorizing method for odorous components according to the present invention is separately provided. This gas-liquid contact tower is exactly the same as the gas-liquid contact tower shown in FIG.
上述した第１図〜第４図の活性汚泥処理方式には示され
ていないが、生物処理槽内での活性汚泥の浮上を防止す
るために、生物処理槽に直接鉄系凝集剤を添加する場合
がある。このような場合でも、鉄系凝集剤が添加された
生物処理槽に臭気成分を含む酸素含有ガスを散気し、あ
るいは、生物処理槽からの活性汚泥混合水と臭気成分を
含むガスとを気液接触塔で接触させることによって、こ
の発明による臭気成分の生物脱臭を実施することができ
る。Although not shown in the activated sludge treatment system of FIGS. 1 to 4 described above, an iron-based coagulant is directly added to the biological treatment tank in order to prevent floating of the activated sludge in the biological treatment tank. There are cases. Even in such a case, the oxygen-containing gas containing the odorous component is diffused into the biological treatment tank to which the iron-based coagulant is added, or the activated sludge mixed water and the gas containing the odorous component from the biological treatment tank are vaporized. The biological deodorization of the odorous component according to the present invention can be carried out by bringing them into contact with each other in a liquid contact tower.
＜実施例＞ BOD成分やCOD成分と共に廃水中のアンモニアを除去する
第５図に示したような低希釈二段活性汚泥法処理方式の
し尿処理施設において、この発明による臭気成分生物脱
臭方法を実施した。このし尿処理施設の仕様を第１表に
示す。<Examples> The odor component biological deodorization method according to the present invention is carried out in a night soil treatment facility of a low-dilution two-stage activated sludge method for removing ammonia in wastewater along with BOD and COD components. did. Table 1 shows the specifications of this human waste treatment facility.
第１表 １）処理方式 低希釈二段活性汚泥法 ２）し尿処理量 90 K／日 ３）浄化槽汚泥処理量 8 K／日 ４）希釈水準 842.8m3/日 ５）希釈倍率 9.6倍 この施設における処理方法を以下に説明する。各受入槽
を経て貯留槽に一時貯留されたし尿と浄化槽汚泥は、そ
れぞれ前処理工程においてスクリーンによって過さ
れ、希釈槽に流入する。ここでし尿と浄化槽汚泥が混合
されると共に、希釈水によって希釈された後、これが第
１撹拌槽（脱窒槽）を経て好気性酸化条件下に維持され
た第１曝気槽（硝化槽）に供給される。ここで廃水中の
有機性窒素とアンモニア性窒素が硝化されると共に、BO
D成分の除去が行われる。硝化されて生成した亜硝酸性
窒素と硝酸性窒素を含む第１曝気槽内の混合液の大部分
が第１撹拌槽に循環液として返送される。Table 1 1) Treatment method Low-dilution two-stage activated sludge method 2) Human waste treatment amount 90 K / day 3) Septic tank sludge treatment amount 8 K / day 4) Dilution level 842.8 m 3 / day 5) Dilution ratio 9.6 times This facility The processing method in step 1 will be described below. The human waste and the septic tank sludge temporarily stored in the storage tank through each receiving tank are passed through the screen in the pretreatment process and flow into the diluting tank. Here, human waste and septic tank sludge are mixed, and after being diluted with dilution water, this is supplied to the first aeration tank (nitrification tank) that is maintained under aerobic oxidation conditions via the first stirring tank (denitrification tank). To be done. Here, organic nitrogen and ammonia nitrogen in the wastewater are nitrified and
The D component is removed. Most of the mixed liquid in the first aeration tank containing nitrite nitrogen and nitric acid nitrogen produced by nitrification is returned to the first stirring tank as a circulating liquid.
この第１撹拌槽は嫌気性還元条件下に維持されており、
希釈されたし尿と浄化槽汚泥の混合廃液、第１曝気槽よ
りの循環液、および沈澱槽から返送された返送汚泥が混
合され滞留している。そして、第１曝気槽で硝化生成さ
れ第１撹拌槽に循環された亜硝酸性窒素と硝酸性窒素
は、第１撹拌槽内に流入したし尿と浄化槽汚泥の混合廃
液のBOD成分を有機炭素源として利用する通性嫌気性菌
によって窒素ガスに還元され、脱窒されると共にBOD成
分も除去される。This first stirred tank is maintained under anaerobic reducing conditions,
The mixed waste liquid of diluted human waste and septic tank sludge, the circulating liquid from the first aeration tank, and the returned sludge returned from the precipitation tank are mixed and accumulated. Then, the nitrite nitrogen and nitrate nitrogen produced in the first aeration tank and circulated in the first stirring tank flow into the first stirring tank, and the BOD component of the mixed waste liquid of human waste and septic tank sludge is used as an organic carbon source. It is reduced to nitrogen gas by a facultative anaerobic bacterium that is used as and denitrified, and the BOD component is also removed.
次に第１撹拌槽と第１曝気槽を通過した混合液は嫌気性
還元条件下に維持された第２撹拌槽に導入され、先の第
１撹拌槽で還元されなかった残りの亜硝酸性窒素と硝酸
性窒素が、窒素ガスに還元される。この場合、第２撹拌
槽内に若干のメタノールを補助的に添加することによっ
て、亜硝酸性窒素と硝酸性窒素の窒素ガスへの還元速度
が促進される。Next, the mixed liquid that passed through the first stirring tank and the first aeration tank was introduced into the second stirring tank maintained under anaerobic reducing conditions, and the remaining nitrite which was not reduced in the first stirring tank was changed. Nitrogen and nitrate nitrogen are reduced to nitrogen gas. In this case, the rate of reduction of nitrite nitrogen and nitrate nitrogen to nitrogen gas is promoted by supplementarily adding a little methanol to the second stirred tank.
第２撹拌槽を経た脱窒混合液は次いで第２曝気槽に送ら
れ、ここで空気曝気が施され、残余のBOD成分が除去さ
れると共に、活性汚泥に付着したガスの脱気が行われ
る。次いで沈澱槽で処理水と活性汚泥とに沈降分離さ
れ、処理水はさらに凝集分離工程、オゾン酸化工程、
過工程および消毒工程を経て放流される。The denitrification mixture that has passed through the second stirring tank is then sent to the second aeration tank, where it is subjected to air aeration to remove the remaining BOD components and to degas the gas adhering to the activated sludge. . Next, the treated water and the activated sludge are settled and separated in a settling tank, and the treated water is further subjected to a coagulation separation step, an ozone oxidation step,
It is discharged through the over-process and the disinfection process.
上述したごときし尿処理施設を使用したこの実施例で
は、凝集分離工程にて凝集剤として硫酸バンドを80mg/
とアニオン系高分子凝集剤を1.2mg/の割合で添加
し、凝集汚泥を沈降分離した。この凝集汚泥と沈澱槽か
らの余剰汚泥とを濃縮槽に導き、この濃縮槽でこれらの
汚泥を水分98重量％まで濃縮した。かくして得られた濃
縮汚泥を一時汚泥貯留槽に貯留すると共に、この濃縮汚
泥を混合槽に導入し、カチオン系高分子凝集剤を380mg/
の割合で添加混合した。In this example using the above-mentioned waste urine treatment facility, 80 mg / sulfate band was used as the coagulant in the coagulation separation step
The anionic polymer flocculant was added at a ratio of 1.2 mg /, and the flocculated sludge was settled and separated. The coagulated sludge and the excess sludge from the sedimentation tank were introduced into a concentration tank, and the sludge was concentrated to 98% by weight in the concentration tank. The concentrated sludge thus obtained is stored in a temporary sludge storage tank, and this concentrated sludge is introduced into a mixing tank, and a cationic polymer flocculant is added at 380 mg /
Was added and mixed at a ratio of.
次いで、脱水機（フィルタープレス）内に導入された汚
泥に対してポリ硫酸第二鉄を3500mg/の割合で添加
し、脱水汚泥と脱水分離液を得た。このときの凝集汚
泥、余剰汚泥、濃縮汚泥、カチオン系高分子凝集剤、ポ
リ硫酸第二鉄、脱水機の洗浄水および脱水分離液の各流
量は、第２表に示す通りであった。Then, ferric polysulfate was added at a rate of 3500 mg / to the sludge introduced into the dehydrator (filter press) to obtain dehydrated sludge and dehydrated separated liquid. The respective flow rates of the coagulated sludge, the excess sludge, the concentrated sludge, the cationic polymer coagulant, the ferric polysulfate, the washing water of the dehydrator and the dehydrated separated liquid at this time were as shown in Table 2.
第２表 流 体 名 流 量 m3/HR １）凝集汚泥 1.02（0.8％濃度） ２）余剰汚泥 2.72（1.2％濃度） ３）濃縮汚泥 14.0（2.0％濃度） ４）カチオン系 高分子凝集剤 2.74（0.2％溶液） ５）ポリ硫酸第二鉄 0.0378 ６）洗浄水 18 ７）脱水分離液 20.7 かくして得られた脱水分離液を希釈槽に導入すると共
に、し尿受入槽および貯留槽、浄化槽汚泥受入槽および
貯留槽、前処理工程からブロワを介して臭気成分を含む
空気を吸引し、第１曝気槽内に36.7Nm3/分の割合で、ま
た第２曝気槽内に4Nm3/分の割合で送入して槽内を曝気
した。このときの第１曝気槽におけるMLVSSは6000mg/
であり、また鉄イオン濃度は40mg/であった。第１曝
気槽の蓋に設けられたサンプリング口から採取した臭気
成分の濃度を第１曝気槽で曝気する前の臭気成分濃度
（原臭）と共に第３表に示す。The second table flow body name Flow rate m 3 / HR 1) aggregation sludge 1.02 (0.8% concentration) 2) excess sludge 2.72 (1.2% concentration) 3) thickened sludge 14.0 (2.0% strength) 4) Cationic polymer flocculant 2.74 (0.2% solution) 5) Ferric polysulfate 0.0378 6) Wash water 18 7) Dehydrated separated liquid 20.7 Introduce the dehydrated separated liquid thus obtained into the diluting tank, and also receive human waste receiving tank and storage tank, septic tank sludge receiving bath and reservoir, pretreated through the blower from step sucks air containing odor components, at a rate of 36.7Nm 3 / min in the first aeration tank, also the proportion of 4 Nm 3 / min in the second aeration tank And the inside of the tank was aerated. MLVSS in the first aeration tank at this time is 6000 mg /
And the iron ion concentration was 40 mg /. Table 3 shows the concentrations of the odorous components collected from the sampling port provided on the lid of the first aeration tank together with the odorous component concentration (original odor) before aeration in the first aeration tank.
なお本実施例との比較のために、上記したのと同じし尿
と浄化槽汚泥とを同じ割合に混合し、鉄イオンを含有す
る脱水分離液を混合せずに20倍希釈した液を処理する連
続式活性汚泥法処理実験装置（脱窒処理なし）を使用し
て、曝気槽を上記施設と同じMLVSSに調整し、さらに吹
き込み水深、散気方法、臭気容積負荷、空塔速度が上記
施設と同じになるようにして、上記したのと同じ臭気成
分を含む空気で曝気した。かような比較例の結果も第３
表に併記する。For comparison with the present example, the same sewage and septic tank sludge as described above are mixed in the same proportion, and a 20-fold diluted liquid is treated without mixing the dehydrated separated liquid containing iron ions. The aeration tank was adjusted to the same MLVSS as the above facility by using the activated type activated sludge method experimental equipment (without denitrification), and the blowing water depth, aeration method, odor volume load, and superficial velocity were the same as the above facility. And was aerated with air containing the same odorous components as described above. The result of such a comparative example is also the third
Also listed in the table.
第３表からわかるように、硫化水素、硫化メチル、二硫
化メチル、メチルメルカプタンの臭気濃度がそれぞれ9
6.2％、91.4％、99.0％、78.3％向上している。また、
アンモニアである窒素化合物も25.5％向上している。こ
れは、本実施例で用いた施設が脱窒処理を行っているた
めである。 As can be seen from Table 3, the odor concentrations of hydrogen sulfide, methyl sulfide, methyl disulfide and methyl mercaptan are 9 and 9 respectively.
It improved by 6.2%, 91.4%, 99.0% and 78.3%. Also,
The nitrogen compound, which is ammonia, has also improved by 25.5%. This is because the facility used in this example is performing denitrification.
＜発明の効果＞ 以上の説明からわかるようにこの発明によれば、臭気成
分を含むガスを生物処理に用いている鉄系凝集剤が存在
している活性汚泥混合水と接触させることによって、活
性汚泥のみの作用による臭気成分の生物脱臭効果と比較
して、さらに優れた生物脱臭効果を得ることができ、特
に臭気物質のうちでも硫黄化合物の除去率を高めること
ができる。<Effects of the Invention> As can be seen from the above description, according to the present invention, the gas containing the odorous component is brought into contact with the activated sludge mixed water in which the iron-based flocculant used in the biological treatment is present to activate Compared with the biological deodorizing effect of the odorous component due to the action of only the sludge, a more excellent biological deodorizing effect can be obtained, and in particular, the removal rate of sulfur compounds among the odorous substances can be increased.
また、鉄系凝集剤は凝集処理や汚泥の脱水処理に使用さ
れ、かような処理により生成・分離される凝集汚泥や脱
水分離液中にかなりの量が含まれている。この発明で
は、鉄系凝集剤が含まれているこれら凝集汚泥や脱水分
離液を廃水の生物処理槽へ導入して活性汚泥混合水と
し、これを廃水の生物処理と臭気成分の生物脱臭の両方
に利用できるため、当初の目的を果たした後の凝集剤成
分の有効利用を図ることができるという利点もある。Further, the iron-based coagulant is used for coagulation treatment and sludge dewatering treatment, and a considerable amount is contained in the coagulated sludge and dehydrated separated liquid produced and separated by such treatment. In this invention, these flocculated sludges containing iron-based flocculants and dehydrated separated liquids are introduced into a biological treatment tank of wastewater to obtain activated sludge mixed water, which is used for both biological treatment of wastewater and biological deodorization of odorous components. Therefore, there is also an advantage that the flocculant component can be effectively used after the initial purpose is achieved.
第１図、第２図、第３図および第４図は、この発明の実
施態様の説明図であり、この発明方法を組み入れた各種
活性汚泥法処理方式を示す。 第５図は、この発明の実施例に用いたし尿処理施設の説
明図である。 第６図および第７図は、従来の方法で用いられていた装
置の例を示す説明図である。FIG. 1, FIG. 2, FIG. 3 and FIG. 4 are explanatory views of an embodiment of the present invention, showing various activated sludge method treatment systems incorporating the method of the present invention. FIG. 5 is an explanatory diagram of the human waste processing facility used in the embodiment of the present invention. 6 and 7 are explanatory views showing an example of an apparatus used in the conventional method.
Claims (3)
用いている鉄系凝集剤を含有する活性汚泥混合水と接触
させて臭気成分を除去し、かつ該活性汚泥混合水により
廃水の生物処理を行うことを特徴とする臭気成分の生物
脱臭方法。1. A gas containing an odor component is brought into contact with an activated sludge mixed water containing an iron-based coagulant used for biological treatment of waste water to remove the odor component, and the activated sludge mixed water is used to remove the waste water. A biological deodorizing method for odorous components, characterized by performing biological treatment.
物処理槽内の鉄系凝集剤を含有する活性汚泥混合水中に
散気することによって、廃水の生物処理と臭気成分の生
物脱臭とを生物処理槽内で同時に行なうことを特徴とす
る臭気成分の生物脱臭方法。2. Oxygen-containing gas containing an odorous component is diffused into activated sludge mixed water containing an iron-based coagulant in a biological treatment tank of wastewater, whereby biological treatment of wastewater and biological deodorization of odorous components are performed. The method for biological deodorization of odorous components is characterized in that the steps are simultaneously performed in the biological treatment tank.
る活性汚泥混合水を気液接触塔へ導入し、臭気成分を含
むガスを気液接触塔内で該活性汚泥混合水と接触させて
臭気成分を除去した後、該活性汚泥混合水を前記生物処
理槽に循環させて廃水の生物処理を行うことを特徴とす
る臭気成分の生物脱臭方法。3. An activated sludge mixed water containing an iron-based coagulant in a biological treatment tank of waste water is introduced into a gas-liquid contact tower, and a gas containing an odorous component is mixed with the activated sludge mixed water in the gas-liquid contact tower. A method for biological deodorization of odorous components, characterized in that the activated sludge mixed water is circulated in the biological treatment tank to perform biological treatment of wastewater after contacting to remove the odorous components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63122814A JPH0687942B2 (en) | 1988-05-19 | 1988-05-19 | Biological deodorization method for odorous components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63122814A JPH0687942B2 (en) | 1988-05-19 | 1988-05-19 | Biological deodorization method for odorous components |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01293119A JPH01293119A (en) | 1989-11-27 |
| JPH0687942B2 true JPH0687942B2 (en) | 1994-11-09 |
Family
ID=14845297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63122814A Expired - Fee Related JPH0687942B2 (en) | 1988-05-19 | 1988-05-19 | Biological deodorization method for odorous components |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0687942B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101445907B1 (en) * | 2011-12-23 | 2014-10-01 | 주식회사 포스코아이씨티 | System and Method for Deodorizing Gas |
| JP2019107593A (en) * | 2017-12-15 | 2019-07-04 | 水ｉｎｇ株式会社 | Deodorization treatment system and organic matter treatment method |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07124437A (en) * | 1993-11-08 | 1995-05-16 | Nippon Steel Corp | Biological deodorization method of malodorous gas |
| JP3476572B2 (en) * | 1994-12-08 | 2003-12-10 | 三菱化工機株式会社 | Biological deodorizer |
| DE19739864A1 (en) * | 1997-09-11 | 1999-03-18 | Dornier Gmbh Lindauer | Process for treating the exhaust air from thermal drying processes, in particular from processes during the drying of sewage sludge in sewage sludge dryers and plant for carrying out the process |
| JP3737283B2 (en) * | 1998-08-03 | 2006-01-18 | 株式会社神鋼環境ソリューション | Biological deodorization method and biological deodorization apparatus |
| JP6026865B2 (en) * | 2012-11-26 | 2016-11-16 | 水ｉｎｇ株式会社 | Sludge treatment apparatus and phosphorus production method |
| JP6499485B2 (en) * | 2015-03-24 | 2019-04-10 | クボタ環境サ−ビス株式会社 | Deodorization treatment apparatus, deodorization treatment system, and deodorization treatment method |
| CN115259562B (en) * | 2022-08-04 | 2024-01-23 | 恩格拜（武汉）生态科技有限公司 | A kind of air flotation sludge conditioning method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5843218A (en) * | 1981-09-09 | 1983-03-12 | Ebara Infilco Co Ltd | Treatment of malodorant gas |
-
1988
- 1988-05-19 JP JP63122814A patent/JPH0687942B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101445907B1 (en) * | 2011-12-23 | 2014-10-01 | 주식회사 포스코아이씨티 | System and Method for Deodorizing Gas |
| JP2019107593A (en) * | 2017-12-15 | 2019-07-04 | 水ｉｎｇ株式会社 | Deodorization treatment system and organic matter treatment method |
| JP2021151654A (en) * | 2017-12-15 | 2021-09-30 | 水ｉｎｇ株式会社 | Deodorization treatment system and organic matter treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01293119A (en) | 1989-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0106043A2 (en) | Process and aeration tank system for biologically treating sewage | |
| JPH0687942B2 (en) | Biological deodorization method for odorous components | |
| WO2000073220A1 (en) | A disposal method for pig ordure | |
| JPH0531490A (en) | Biological treatment method of organic wastewater | |
| JP2003088892A (en) | Organic waste water treatment apparatus | |
| JP6670192B2 (en) | Organic sludge processing method and processing apparatus | |
| JP2796909B2 (en) | Wastewater treatment method | |
| JP3402411B2 (en) | Nitrogen treatment method for wastewater | |
| JP3449868B2 (en) | How to reduce organic sludge | |
| JP3377346B2 (en) | Organic wastewater treatment method and apparatus | |
| JPH1052697A (en) | Method for reduction of organic sludge | |
| JP4620302B2 (en) | Organic wastewater treatment method | |
| JP3916697B2 (en) | Wastewater treatment method | |
| JP2003275726A (en) | Organic waste treatment method and treatment system | |
| JP3181521B2 (en) | Water treatment method and water treatment device | |
| JP3326084B2 (en) | How to reduce organic sludge | |
| JP2000140894A (en) | Sludge treatment equipment | |
| JP2002292399A (en) | Organic wastewater disposal equipment | |
| JP3392295B2 (en) | Method and apparatus for treating organic sewage | |
| JPH1052696A (en) | Method for combined treatment of human waste and private sewerage plant sludge | |
| JP2004097903A (en) | Method of treating sludge returning water | |
| JPH08141596A (en) | Nitrogen treatment method for waste water containing ammonia nitrogen and oxide nitrogen | |
| JPH0691289A (en) | Treatment of wastewater containing dimethyl sulfoxide | |
| JPS6321556B2 (en) | ||
| JPS596986A (en) | Treatment of night soil-type filthy water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |