JPH0636914B2 - Method for treating organic waste liquid containing water-soluble barium compound and boric acid - Google Patents
Method for treating organic waste liquid containing water-soluble barium compound and boric acidInfo
- Publication number
- JPH0636914B2 JPH0636914B2 JP61299346A JP29934686A JPH0636914B2 JP H0636914 B2 JPH0636914 B2 JP H0636914B2 JP 61299346 A JP61299346 A JP 61299346A JP 29934686 A JP29934686 A JP 29934686A JP H0636914 B2 JPH0636914 B2 JP H0636914B2
- Authority
- JP
- Japan
- Prior art keywords
- boric acid
- waste liquid
- barium compound
- water
- soluble barium
- 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 - Lifetime
Links
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 title claims description 48
- 239000004327 boric acid Substances 0.000 title claims description 48
- 239000007788 liquid Substances 0.000 title claims description 44
- 150000001553 barium compounds Chemical class 0.000 title claims description 30
- 238000000034 method Methods 0.000 title claims description 23
- 239000010815 organic waste Substances 0.000 title claims description 19
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 21
- 230000000813 microbial effect Effects 0.000 claims description 10
- 239000010802 sludge Substances 0.000 claims description 9
- 238000004062 sedimentation Methods 0.000 claims description 7
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 claims description 3
- 229910001863 barium hydroxide Inorganic materials 0.000 claims description 3
- 239000002699 waste material Substances 0.000 description 25
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 7
- 244000005700 microbiome Species 0.000 description 7
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 6
- ITHZDDVSAWDQPZ-UHFFFAOYSA-L barium acetate Chemical compound [Ba+2].CC([O-])=O.CC([O-])=O ITHZDDVSAWDQPZ-UHFFFAOYSA-L 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 description 6
- 235000011152 sodium sulphate Nutrition 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 235000011121 sodium hydroxide Nutrition 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000003456 ion exchange resin Substances 0.000 description 3
- 229920003303 ion-exchange polymer Polymers 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910001422 barium ion Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000007496 glass forming Methods 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 238000010979 pH adjustment Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 159000000009 barium salts Chemical class 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- QOSATHPSBFQAML-UHFFFAOYSA-N hydrogen peroxide;hydrate Chemical compound O.OO QOSATHPSBFQAML-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- -1 sulfuric acid compound Chemical class 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Treatment Of Biological Wastes In General (AREA)
- Removal Of Specific Substances (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、水溶性バリウム化合物とホウ酸を含む有機性
廃液の処理方法に係り、さらに詳しくは微生物処理の阻
害物質であるホウ酸をあらかじめ除去する方法に関す
る。The present invention relates to a method for treating an organic waste liquid containing a water-soluble barium compound and boric acid, and more particularly to an inhibitor of microbial treatment. It relates to a method for removing a certain boric acid in advance.
（従来の技術） 水溶性バリウム化合物とホウ酸を含む有機性廃液として
は、例えば垂直磁気記録媒体に用いられる六方晶系Ｂａ
フェライトの磁性粉末をガラス結晶化法で製造する工程
中のガラス形成成分を酢酸等の有機酸で溶解除去する工
程の処理廃液から有価物を回収した後の廃液や次の水洗
工程の洗浄水が挙げられる。(Prior Art) As an organic waste liquid containing a water-soluble barium compound and boric acid, for example, hexagonal Ba used in a perpendicular magnetic recording medium is used.
The waste liquid after recovering valuables from the treatment waste liquid of the process of dissolving and removing the glass-forming components with an organic acid such as acetic acid in the process of manufacturing the magnetic powder of ferrite by the glass crystallization method and the washing water of the next water washing process Can be mentioned.
このような廃液中には、ガラス形成成分である水溶性バ
リウム化合物およびホウ酸と酢酸のような有機酸が低濃
度ながらふくまれており、このような廃液は公害防止の
ため有機酸を分解処理した後、河川等の公共水域に排出
しなければならない。Water-soluble barium compounds, which are glass-forming components, and organic acids such as boric acid and acetic acid, are contained in such waste liquids at low concentrations, and such waste liquids decompose organic acids to prevent pollution. After that, it must be discharged into public waters such as rivers.
しかし、有機性廃液中にホウ酸を含んでいると微生物処
理における微生物の活動に影響をあたえ、処理効率が低
下するといわれており、一般に、ホウ酸濃度（Ｈ３ＢＯ
３換算）が800 mg／以上になるとその作用が顕著にな
ると言われている。However, when boric acid is contained in the organic waste liquid, it is said that the activity of microorganisms in the treatment of microorganisms is affected and the treatment efficiency is reduced. Generally, the concentration of boric acid (H 3 BO
It is said that the effect becomes remarkable when the ( 3 equivalent) becomes 800 mg / or more.
また、ホウ酸を含んだ有機性廃液のＢＯＤ処理に及ぼす
ホウ酸濃度の影響について本発明者が実験したところ第
１表のような結果が得られた。Further, when the present inventor conducted an experiment on the influence of the concentration of boric acid on the BOD treatment of the organic waste liquid containing boric acid, the results shown in Table 1 were obtained.
上記の表からも明らかなように、ホウ酸濃度が1000mg／
以上になると微生物処理の効率低下がみられる。 As is clear from the above table, the boric acid concentration is 1000 mg /
In the above cases, the efficiency of microbial treatment is reduced.
ところで、ホウ酸は水に溶けやすく固形分としての分離
が困難であるため、従来、有機性廃液の微生物処理の前
処理としては、イオン交換樹脂によるホウ酸除去や水を
加えてホウ酸濃度が800 mg／以下になるように希釈す
る等の方法が一般的に行われていた。By the way, since boric acid is easily soluble in water and difficult to separate as a solid content, conventionally, as a pretreatment for microbial treatment of an organic waste liquid, boric acid removal by an ion exchange resin or boric acid concentration by adding water was used. Methods such as diluting to 800 mg / or less were generally used.
（発明が解決しようとする問題点） しかしながら、このような従来の方法には次のような欠
点があった。(Problems to be Solved by the Invention) However, such a conventional method has the following drawbacks.
（イ）設備が大きくなり、設備費が高くなる。(B) Equipment will be large and equipment costs will be high.
（ロ）設備の稼動経費が高い。(B) Equipment operating costs are high.
（ハ）希釈法では多量の水を使用するため、処理量が増
大する。(C) Since the dilution method uses a large amount of water, the treatment amount increases.
（ニ）イオン交換樹脂法では樹脂の再生処理により二次
廃液が生じ、これについても公害防止処理が必要とな
る。(D) In the ion exchange resin method, a secondary waste liquid is generated due to the regenerating treatment of the resin, and this also requires the pollution prevention treatment.
このようにホウ酸を含有する有機性排水の処理方法とし
ては、有効な方法がないのが現状である。As described above, there is currently no effective method for treating organic wastewater containing boric acid.
本発明はこのような難点に対処してなされたもので、設
備や経費をそれほど必要とすることなく、かつ二次廃液
も生ずることのない水溶性バリウム化合物とホウ酸を含
む有機性廃液の処理方法を提供することを目的とする。The present invention has been made in response to such a drawback, and is a treatment of an organic waste liquid containing a water-soluble barium compound and boric acid which does not require much equipment and cost and does not generate a secondary waste liquid. The purpose is to provide a method.
［発明の構成］ （問題を解決するための手段） 本発明の水溶性バリウム化合物とホウ酸を含む有機性廃
液の処理方法は、この有機性廃液中の水溶性バリウム化
合物を難溶性バリウム化合物にして沈降させるとともに
ホウ酸を共沈させて沈降分離除去し、少なくともホウ酸
濃度（Ｈ３ＢＯ３換算）を 800mg／以下にした後、廃
液中の有機性成分を微生物処理することを特徴としてい
る。[Structure of the Invention] (Means for Solving the Problem) The method for treating an organic waste liquid containing a water-soluble barium compound and boric acid according to the present invention is a method in which the water-soluble barium compound in the organic waste liquid is converted into a sparingly soluble barium compound. And boric acid are co-precipitated to remove by sedimentation, and at least boric acid concentration (H 3 BO 3 conversion) is set to 800 mg / or less, and then the organic component in the waste liquid is treated with microorganisms. .
本発明における水溶性バリウム化合物を難溶性バリウム
化合物にして沈降分離させる方法としては、例えば硫酸
や硫酸ナトリウム等の硫酸化合物を添加して硫酸バリウ
ム（ＢａＳＯ４）にする、水酸化ナトリウム等のアルカ
リ溶液を添加して水酸化バリウム（Ｂａ（ＯＨ）２）に
する等が挙げられる。そして、常法に従って無機系また
は高分子系の凝集剤を添加することにより粒径を大きく
させて沈降を促進させて分離除去する。As a method of precipitating and separating the water-soluble barium compound into a sparingly soluble barium compound in the present invention, for example, a sulfuric acid compound such as sulfuric acid or sodium sulfate is added to form barium sulfate (BaSO 4 ), an alkaline solution such as sodium hydroxide. Is added to form barium hydroxide (Ba (OH) 2 ). Then, according to a conventional method, an inorganic or polymer-based coagulant is added to increase the particle size, promote sedimentation, and separate and remove.
また、本発明において、原廃液中の水溶性バリウム化合
物の濃度が低く（バリウムイオン濃度で約 200mg／以
下）、良好な凝集物が生成しない場合には、微生物処理
後の余剰汚泥を原廃液に加えることにより、良好な凝集
物を形成させるようにすることが可能である。Further, in the present invention, when the concentration of the water-soluble barium compound in the raw waste liquid is low (barium ion concentration is about 200 mg / or less) and good aggregates are not formed, surplus sludge after microbial treatment is used as the raw waste liquid. By adding it, it is possible to form a good aggregate.
本発明における有機性廃液の微生物処理方法としては、
一般に使用されている接触酸化法、活性汚泥法、回分式
生物処理法、回転円板型生物処理法等を適用することが
できる。The method for treating microorganisms of the organic waste liquid in the present invention,
The generally used catalytic oxidation method, activated sludge method, batch-type biological treatment method, rotating disk type biological treatment method and the like can be applied.
（作 用） 本発明の有機性廃液の処理方法において、水溶性バリウ
ム化合物を難溶性バリウム化合物にして沈降させること
により、この沈降物とともにホウ酸が共沈したり、難溶
性バリウム化合物の結晶中にホウ酸が吸着されたりする
ので、難溶性化合物をつくって固形分として分離するこ
とが難しいホウ酸を容易に沈降分離除去することがで
き、有機性廃液の微生物処理の効率を向上させることが
できる。(Operation) In the method for treating an organic waste liquid of the present invention, when a water-soluble barium compound is converted into a sparingly soluble barium compound and precipitated, boric acid co-precipitates with the precipitate or a crystal of the sparingly soluble barium compound is formed. Since boric acid is adsorbed on the surface, boric acid, which is difficult to form as a solid compound by forming a sparingly soluble compound, can be easily settled, separated and removed, and the efficiency of microbial treatment of organic waste liquid can be improved. it can.
（実施例） 次に、本発明の一実施例について詳細に説明する。(Example) Next, an example of the present invention will be described in detail.
図面は、本発明の方法を適用して構成したホウ酸を含ん
だ酢酸バリウム廃液の処理装置のフローシートである。The drawing is a flow sheet of an apparatus for treating a barium acetate waste liquid containing boric acid, which is constructed by applying the method of the present invention.
図面に示すように、この装置は廃液のｐＨを調整するた
めの原水調整槽１と、廃液中の酢酸バリウムを難溶性の
硫酸バリウムにする反応槽２と、反応槽２から送られた
廃液中の懸濁物質を高分子凝集剤にて凝集させる凝集槽
３と、この凝集物を沈降分離させて除去する沈澱槽４
と、不溶性バリウム化合物とともにホウ酸が除去された
廃液を微生物処理するための生物接触酸化槽５と、この
微生物処理によって生じた固形分を沈降分離させて除去
する沈澱槽６と、それぞれの槽に注入する薬剤を収容す
る薬剤槽７ａ、７ｂ、７ｃ、７ｄと，原水調整槽１、反
応槽２および生物接触酸化槽５は攪はんのために空気を
送入するブロワー８とから主として構成されている。As shown in the drawing, this apparatus comprises a raw water adjusting tank 1 for adjusting the pH of waste liquid, a reaction tank 2 for converting barium acetate in the waste liquid into sparingly soluble barium sulfate, and a waste liquid sent from the reaction tank 2. Flocculation tank 3 for flocculating the suspended solids of No. 1 with a polymer flocculant, and settling tank 4 for removing the flocculates by sedimentation
A biological contact oxidation tank 5 for microbial treatment of the waste liquid from which boric acid has been removed together with the insoluble barium compound; The chemical tanks 7a, 7b, 7c and 7d for containing the chemicals to be injected, the raw water conditioning tank 1, the reaction tank 2 and the biological contact oxidation tank 5 are mainly composed of a blower 8 for feeding air for stirring. ing.
このゆに構成された処理装置を使用したホウ酸濃度2000
mg／、酸化バリウム濃度1100mg／、酢酸濃度 950mg
／（なお、廃液中には酢酸バリウムとして含有されて
いるがこの値をそれぞれ酸化バリウム、酢酸濃度に換算
した値である）ｐＨ４．５である廃液の処理について説
明する。Concentration of boric acid of 2000 using a processing device configured with this Yuni
mg /, barium oxide concentration 1100 mg /, acetic acid concentration 950 mg
/ (Note that the treatment of a waste liquid having a pH of 4.5, which is contained in the waste liquid as barium acetate but is a value obtained by converting these values into barium oxide and acetic acid concentrations, respectively) will be described.
まず、ホウ酸と酢酸バリウムを含んだ原廃液を原水調整
槽１に送り込み、ここで苛性ソーダ槽７ａよりポンプＰ
１によって15％苛性ソーダ水溶液を添加して廃液のｐＨ
調整を行なう。このｐＨ調整は、微生物の活動にとって
はｐＨ６〜８が好ましく、ｐＨ６以下またはｐＨ８以上
では微生物が不活発になるかまたは死滅してしまうが、
微生物が酢酸を処理すると廃液のｐＨが若干高くなるた
め、凝集沈澱後の処理水のｐＨが６〜７になるように、
この原水調整槽１において調整する。ｐＨを調整した廃
液はポンプＰ５により反応槽２に移送する。そして、反
応槽２において硫酸ソーダ槽７ｂより10％硫酸ソーダ水
溶液を処理廃液に対して硫酸ソーダが約1200mg／とな
るように添加し、酢酸バリウムと硫酸ソーダを反応させ
て不溶性の硫酸バリウムの結晶を生成させる。この硫酸
バリウムの結晶は微細で沈降分離が困難であるため、次
の凝集槽３において高分子凝集剤槽７ｃより０．１％高
分子凝集剤水溶液を添加して硫酸バリウムとホウ酸から
なる懸濁物質を凝集させ、次の沈澱槽４にて沈降分離す
る。分離除去された硫酸バリウムとホウ酸の沈澱物はポ
ンプＰ７により汚泥貯留槽１０に収容される。このよう
にしてバリウム塩と共にホウ酸を除去した廃液に栄養剤
槽７ｄより水で３％濃度に希釈された栄養剤液を注入し
て、次いで４槽に分割された生物接触酸化槽５に移送
し、酢酸を分離処理する。この微生物処理によって生じ
た汚泥は沈澱槽６にて沈降分離され、上澄み水を処理水
として放流する。沈降分離された汚泥の大部分は、ポン
プＰ６により生物接触酸化槽５にもどされる。First, the raw waste liquid containing boric acid and barium acetate is fed into the raw water adjusting tank 1, where the pump P is fed from the caustic soda tank 7a.
Add 15% caustic soda solution according to 1 .
Make adjustments. This pH adjustment is preferably pH 6 to 8 for the activity of microorganisms, and becomes inactive or kills at pH 6 or lower or pH 8 or higher,
When microorganisms treat acetic acid, the pH of the waste liquid increases slightly, so that the pH of the treated water after coagulation and precipitation should be 6-7.
Adjustment is made in this raw water adjusting tank 1. The pH-adjusted waste liquid is transferred to the reaction tank 2 by the pump P 5 . Then, in the reaction tank 2, a 10% sodium sulfate aqueous solution was added from the sodium sulfate tank 7b so that the sodium sulfate was about 1200 mg / to the treatment waste liquid, and barium acetate and sodium sulfate were reacted to produce insoluble barium sulfate crystals. Is generated. Since the crystals of barium sulfate are fine and difficult to separate by sedimentation, 0.1% polymer flocculant aqueous solution is added from the polymer flocculant bath 7c in the next flocculation tank 3 to form a suspension of barium sulfate and boric acid. The turbid substances are aggregated and settled and separated in the next settling tank 4. The separated and removed barium sulfate and boric acid precipitates are stored in the sludge storage tank 10 by a pump P 7 . In this way, the nutrient solution diluted with water to a concentration of 3% from the nutrient solution tank 7d is injected into the waste liquid from which boric acid has been removed together with the barium salt, and then transferred to the biological contact oxidation tank 5 divided into four tanks. Then, the acetic acid is separated. The sludge generated by this microbial treatment is settled and separated in the settling tank 6, and the supernatant water is discharged as treated water. Most of the sludge that has been separated by settling is returned to the biological contact oxidation tank 5 by the pump P 6 .
また、原廃液中のバリウムイオン濃度が低くて難溶性の
硫酸バリウムの生成量が少なく良好な凝集物ができない
ときは、沈澱槽６にて沈降分離された汚泥のうちの余剰
汚泥の一部をポンプＰ６により原水調整槽１に送り込
み、廃液中の懸濁物質濃度を高めて処理を行なう。In addition, when the barium ion concentration in the raw waste liquid is low and the amount of sparingly soluble barium sulfate is small and good agglomerates cannot be formed, a part of the excess sludge out of the sludge settled and separated in the settling tank 6 is removed. It is sent to the raw water adjusting tank 1 by the pump P 6 to increase the concentration of suspended substances in the waste liquid for treatment.
このようにして処理された廃液の各工程における各成分
を第２表に示す。なお、ホウ酸濃度はＨ３ＢＯ３として
測定したものである。Table 2 shows each component in each step of the waste liquid thus treated. The boric acid concentration is measured as H 3 BO 3 .
この表によると、初め2000mg／であったホウ酸濃度が
凝集沈澱後には 450mg／に減少しており、ホウ酸の除
去率は77％となっている。そして、このようにホウ酸濃
度が減少されたことによって、初め 950mg／であった
酢酸濃度が微生物処理後に10mg／に減少し、その除去
率は99％と好結果を示した。 According to this table, the concentration of boric acid, which was initially 2000 mg /, decreased to 450 mg / after coagulation and precipitation, and the boric acid removal rate was 77%. Due to such a decrease in boric acid concentration, the concentration of acetic acid, which was initially 950 mg /, was reduced to 10 mg / after microbial treatment, and the removal rate was 99%, which was a good result.
このようにこの実施例では、酢酸バリウムに硫酸ソーダ
を反応させて不溶性の硫酸バリウムの結晶を析出させる
ことにより、ホウ酸が共沈するかまたは硫酸バリウムの
結晶にホウ酸が吸着して高分子凝集剤によって作られた
硫酸バリウムの大きな凝集物の中に閉じこめられるた
め、ホウ酸を容易に除去することができる。Thus, in this example, by reacting barium acetate with sodium sulfate to precipitate insoluble barium sulfate crystals, boric acid co-precipitated or boric acid was adsorbed to barium sulfate crystals and polymer The boric acid can be easily removed because it is trapped within the large agglomerates of barium sulfate made by the flocculant.
なお、本発明は上記実施例に限定されるものではなく、
難溶性バリウム化合物にする手段として、例えばｐＨ調
整用の苛性ソーダを過剰に添加して廃液のｐＨを10以上
にすることにより、水酸化バリウムの沈澱を生成させて
ホウ酸を共沈させることもでき、また本発明者の実験に
よれば過酸化水素水と反応させることにより、バリウム
とホウ酸の不溶性化合物を生成することがわかってお
り、このように難溶性のバリウム化合物を形成するもの
であればどのような手段を用いてもよい。また、難溶性
バリウム化合物への手段を変える場合には、当然それに
合せて各ｐＨの調整等を設定する。The present invention is not limited to the above embodiment,
As a means for making the sparingly soluble barium compound, for example, caustic soda for pH adjustment may be added in excess to adjust the pH of the waste liquid to 10 or more, thereby causing the precipitation of barium hydroxide to co-precipitate boric acid. Further, according to the experiments of the present inventor, it is known that an insoluble compound of barium and boric acid is produced by reacting with hydrogen peroxide water, and it is possible to form such a sparingly soluble barium compound. Any means may be used. Also, when changing the means for the sparingly soluble barium compound, adjustment of each pH and the like are naturally set accordingly.
［発明の効果］ 以上の説明からも明らかなように本発明によれば、水溶
性バリウム化合物を少なくとも難溶性バリウム化合物に
して沈降させるとともにホウ酸を共沈させて沈降分離除
去して、微生物処理に影響を及ぼさない濃度までホウ酸
濃度を減少させているので、イオン交換樹脂設備等の専
用設備を必要とすることなく、従って樹脂再生等による
二次公害防止処理も必要とすることなく、さらに希釈水
を用いたときのように処理量を増大させることなく容易
にホウ酸を除去することができ、これにより有機性成分
の処理が確実に行なえるとともに、設備費やランニング
コストの面でも経済的である。[Effects of the Invention] As is clear from the above description, according to the present invention, a water-soluble barium compound is converted into at least a sparingly soluble barium compound and precipitated, and boric acid is co-precipitated to be separated and removed by sedimentation to treat a microorganism. Since the boric acid concentration is reduced to a level that does not affect the above, it does not require dedicated equipment such as ion exchange resin equipment, and therefore does not require secondary pollution prevention processing such as resin regeneration. Boric acid can be easily removed without increasing the treatment amount as when using diluting water, which ensures the treatment of organic components and is economical in terms of equipment costs and running costs. Target.
図面は本発明の一実施例を適用した処理装置を示すフロ
ーシートである。 １……原水処理槽、 ２……反応槽、 ３……凝集槽、 ４、６……沈澱槽、 ５……生物接触酸化槽、 １０……汚泥貯留槽The drawings are flow sheets showing a processing apparatus to which an embodiment of the present invention is applied. 1 ... Raw water treatment tank, 2 ... Reaction tank, 3 ... Coagulation tank, 4, 6 ... Sedimentation tank, 5 ... Biological contact oxidation tank, 10 ... Sludge storage tank
Claims (4)
性廃液の処理にあたり、前記水溶性バリウム化合物を難
溶性バリウム化合物にして沈降させるとともに前記ホウ
酸を共沈させて沈降分離除去し、少なくともホウ酸濃度
を 800mg／以下にした後、前記有機性廃液中の有機性
成分を微生物処理することを特徴とする水溶性バリウム
化合物とホウ酸を含む有機性廃液の処理方法。1. When treating an organic waste liquid containing a water-soluble barium compound and boric acid, the water-soluble barium compound is converted into a sparingly soluble barium compound and precipitated, and the boric acid is co-precipitated to be separated and removed by sedimentation. A method for treating an organic waste liquid containing a water-soluble barium compound and boric acid, which comprises subjecting an organic component in the organic waste liquid to a microbial treatment after the concentration of boric acid is set to 800 mg / or less.
性廃液に微生物処理後の余剰汚泥を混合する特許請求の
範囲第１項記載の水溶性バリウム化合物とホウ酸を含む
有機性廃液の処理方法。2. The treatment of an organic waste liquid containing a water-soluble barium compound and boric acid according to claim 1, wherein the organic waste liquid containing a water-soluble barium compound and boric acid is mixed with excess sludge after microbial treatment. Method.
る特許請求の範囲第１項または第２項記載の水溶性バリ
ウム化合物とホウ酸を含む有機性廃液の処理方法。3. The method for treating an organic waste liquid containing a water-soluble barium compound and boric acid according to claim 1 or 2, wherein the sparingly soluble barium compound is barium sulfate.
ある特許請求の範囲第１項または第２項記載の水溶性バ
リウム化合物とホウ酸を含む有機性廃液の処理方法。4. The method for treating an organic waste liquid containing a water-soluble barium compound and boric acid according to claim 1 or 2, wherein the sparingly soluble barium compound is barium hydroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61299346A JPH0636914B2 (en) | 1986-12-15 | 1986-12-15 | Method for treating organic waste liquid containing water-soluble barium compound and boric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61299346A JPH0636914B2 (en) | 1986-12-15 | 1986-12-15 | Method for treating organic waste liquid containing water-soluble barium compound and boric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63151399A JPS63151399A (en) | 1988-06-23 |
| JPH0636914B2 true JPH0636914B2 (en) | 1994-05-18 |
Family
ID=17871359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61299346A Expired - Lifetime JPH0636914B2 (en) | 1986-12-15 | 1986-12-15 | Method for treating organic waste liquid containing water-soluble barium compound and boric acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0636914B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4633272B2 (en) * | 2001-01-23 | 2011-02-16 | オルガノ株式会社 | Treatment method for boron-containing wastewater |
| CN109273130B (en) * | 2018-08-07 | 2022-03-29 | 西南科技大学 | Preparation method of high-sulfur high-sodium high-emission waste liquid glass ceramic solidified body |
| JP7463323B2 (en) * | 2021-08-11 | 2024-04-08 | 株式会社東芝 | System and method for fixing carbon dioxide by seawater electrolysis |
| CN117105454B (en) * | 2023-08-10 | 2026-03-10 | 江苏中电创新环境科技有限公司 | Treatment system and treatment method for industrial boron-containing wastewater |
-
1986
- 1986-12-15 JP JP61299346A patent/JPH0636914B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63151399A (en) | 1988-06-23 |
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