JPH09290276A - Waste liquid treatment method - Google Patents
Waste liquid treatment methodInfo
- Publication number
- JPH09290276A JPH09290276A JP14060796A JP14060796A JPH09290276A JP H09290276 A JPH09290276 A JP H09290276A JP 14060796 A JP14060796 A JP 14060796A JP 14060796 A JP14060796 A JP 14060796A JP H09290276 A JPH09290276 A JP H09290276A
- Authority
- JP
- Japan
- Prior art keywords
- waste liquid
- discharged
- alkaline
- battery manufacturing
- treatment method
- 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.)
- Pending
Links
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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Landscapes
- Removal Of Specific Substances (AREA)
- Secondary Cells (AREA)
Abstract
(57)【要約】
【課題】 蓄電池製造工場から排出するアリカリ性廃液
と酸性廃液を中和して処理方法を提供する。
【解決手段】 硝酸塩類を含まないアルカリ性廃液のみ
を分割収集し、これを酸性廃液と混合中和して処理す
る。(57) [Abstract] [PROBLEMS] To provide a treatment method by neutralizing alkaline waste liquid and acidic waste liquid discharged from a battery manufacturing plant. SOLUTION: Only an alkaline waste liquid containing no nitrates is divided and collected, and this is mixed and neutralized with an acidic waste liquid for processing.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は蓄電池製造工場等か
ら排出されるアルカリ性廃液及び酸性廃液を相互に処理
する廃液の処理法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste liquid treatment method for mutually treating an alkaline waste liquid and an acidic waste liquid discharged from a storage battery manufacturing plant or the like.
【０００２】[0002]
【従来の技術】蓄電池製造業の鉛蓄電池製造工業から排
出される鉛含有酸廃液（Ｈ２ＳＯ４）は水酸化ナトリウ
ムで中和処理された後、凝集沈澱法によって処理されて
いる。BACKGROUND ART Lead-containing acid waste liquid discharged from the lead-acid battery manufacturing industry battery manufacturing industry (H 2 SO 4) after being neutralized with sodium hydroxide, being processed by aggregation precipitation method.
【０００３】一方、アルカリ蓄電池製造工場から排出さ
れる、ニツケルやカドミウム等の金属及び硝酸ナトリウ
ムを含む水酸化ナトリウム等のアルカリ性廃液は、硫酸
等の酸で中和された後、凝集沈澱法によって処理した
り、濃縮・焼却法によって処理されている。On the other hand, an alkaline waste liquid such as sodium hydroxide containing metal such as nickel and cadmium and sodium nitrate discharged from an alkaline storage battery manufacturing plant is neutralized with an acid such as sulfuric acid and then treated by a coagulating precipitation method. Or processed by the concentration and incineration method.
【０００４】[0004]
【本発明が解決しようとする課題】この様に、蓄電池製
造工場からの酸性及びアルカリ性の廃液はそれぞれに処
理されている。酸とアルカリはこれを互いに混合すれば
中和し処理ができるものであるが、上記蓄電池製造工場
からの各廃液をそのまま混合処理しようとしても、鉛の
凝集率が著しく低下する為に相互中和ができず、この事
が、廃液処理をそれぞれに処理を余儀無くさせ、処理の
煩雑さと、多大な費用を強いており、改良が望まれてい
る。As described above, the acidic and alkaline waste liquids from the storage battery manufacturing plant are treated separately. Acids and alkalis can be neutralized by mixing them together for treatment, but even if the waste liquids from the above-mentioned storage battery manufacturing plant are treated as they are, the coagulation of lead will be significantly reduced, resulting in mutual neutralization. However, this necessitates a waste liquid treatment for each process, complicating the process and enormous cost, and an improvement is desired.
【０００５】[0005]
【課題を解決するための手段】本発明は、アルカリ性廃
液中に含まれる硝酸ナトリウムが酸性廃液と混合した場
合、硝酸鉛を形成し凝集沈澱法における鉛の凝集率を低
下させていることを見出し、硝酸ナトリウムを含む廃液
を出す工程の廃液のみを他の工程で排出するアルカリ性
廃液と区分けし、硝酸ナトリウムを含まないアルカリ性
廃液を酸性廃液と中和することで、廃液処理を可能にし
たものである。The present invention has found that when sodium nitrate contained in an alkaline waste liquid mixes with an acidic waste liquid, it forms lead nitrate and reduces the lead agglomeration rate in the agglomeration precipitation method. By separating only the waste liquid in the process of producing waste liquid containing sodium nitrate from the alkaline waste liquid discharged in other processes, and neutralizing the alkaline waste liquid not containing sodium nitrate with the acidic waste liquid, it is possible to process waste liquid. is there.
【０００６】[0006]
【発明の実施の形態】アルカリ蓄電池の製造は、通常、
硝酸ニツケルや硝酸カドミウム等の硝酸塩水溶液を用い
て金属を焼結して得た金属多孔基板内に含浸充填する工
程、該含浸した硝酸塩を水酸化ナトリウム水溶液中に浸
漬して該硝酸塩を活物質である水酸化ニツケルや水酸化
カドミウムの水酸化物に変える工程、更に、水酸化ナト
リウム水溶液中で充放電を繰り返し活性化をする工程等
を備え、それぞれの工程廃液が排出されるが、各工程の
廃液をそれぞれ分離して収集し、硝酸塩を含まない活性
化をする工程（化成工程）からの廃液を鉛蓄電池の製造
工場から排出された鉛を含む硫酸廃液と混合して中和
し、凝集剤と塩化第二鉄を加えて凝縮させ、沈澱物を濾
過し、上澄み液はｐＨを７に調整して放流し、沈澱物は
脱水処理後、産業廃棄物として処理できる。BEST MODE FOR CARRYING OUT THE INVENTION Alkaline storage batteries are usually manufactured by
A step of impregnating and filling a porous metal substrate obtained by sintering a metal using an aqueous solution of a nitrate such as nickel nitrate or cadmium nitrate, immersing the impregnated nitrate in an aqueous solution of sodium hydroxide to use the nitrate as an active material. It is equipped with a step of changing to a certain nickel hydroxide or hydroxide of cadmium hydroxide, and a step of repeatedly activating and repeating charging and discharging in an aqueous solution of sodium hydroxide, and the waste liquid of each step is discharged. The waste liquids are separated and collected, and the waste liquid from the nitrate-free activation process (chemical conversion process) is mixed with the sulfuric acid waste liquid containing lead discharged from the lead-acid battery manufacturing plant to neutralize it And ferric chloride are added and condensed, the precipitate is filtered, the supernatant is adjusted to pH 7 and discharged, and the precipitate can be treated as industrial waste after dehydration treatment.
【０００７】[0007]
【実施例】沈澱槽内で、鉛蓄電池製造工場から排出され
る鉛を約２５ｐｐｍ含む希硫酸廃液に、アルカリ蓄電池
製造工場の化成工程から排出されたニツケル約２０ｐｐ
ｍ、カドミウム約１５ｐｐｍを含む水酸化ナトリウム廃
液を加えてｐＨ１０に調整した後、高分子凝集剤（商品
名 ＦＫフロツク、富士化水工業（株）製）と凝集核剤
として塩化第二鉄を加えよく攪拌して凝集させたとこ
ろ、沈澱物と透き通った上澄み液とに分離した。この上
澄み液は濾過した後、工業用硫酸でｐＨ７に調整した結
果、その儘放流可能なものになっていた。又、沈澱物は
その後加熱脱水処理して産業廃棄物として処理した。[Example] In the settling tank, about 20 pp of nickel discharged from the chemical conversion process of the alkaline storage battery manufacturing plant was added to the dilute sulfuric acid waste liquid containing about 25 ppm of lead discharged from the lead storage battery manufacturing plant.
After adjusting the pH to 10 by adding a sodium hydroxide waste solution containing m and cadmium of about 15 ppm, a polymer flocculant (trade name: FK Flock, manufactured by Fuji Kamizu Kogyo Co., Ltd.) and ferric chloride as a flocculating nucleating agent are added. When the mixture was stirred well and coagulated, it was separated into a precipitate and a clear supernatant liquid. After the supernatant was filtered, it was adjusted to pH 7 with industrial sulfuric acid, and as a result, it could be discharged. The precipitate was then dehydrated by heating and treated as industrial waste.
【０００８】尚、硝酸ナトリウム等の硝酸塩を含むアリ
カリ性廃液は別途乾燥固形化し、高温溶融処理を行って
スラグ化した。The alkaline waste liquid containing a nitrate such as sodium nitrate was separately dried and solidified, and subjected to a high temperature melting treatment to form a slag.
【０００９】[0009]
【比較例】沈澱槽内で、鉛蓄電池製造工場から排出され
る鉛を約２５ｐｐｍ含む希硫酸廃液に、アルカリ蓄電池
製造工場の各工程から排出された廃液を混合した硝酸ナ
トリウム等の硝酸塩を含むアルカリ性廃液を加えてｐＨ
１０に調整した後、実施例同様の高分子凝集剤と凝集核
剤を加えてよく攪拌して凝集状態を観察したが、白濁し
たままで沈澱物は少量観測されただけであった。[Comparative example] In a settling tank, a diluted sulfuric acid waste liquid containing about 25 ppm of lead discharged from a lead storage battery manufacturing plant was mixed with the waste liquid discharged from each step of the alkaline storage battery manufacturing plant. PH by adding waste liquid
After adjusting to 10, the polymer coagulant and coagulant nucleating agent similar to those in the examples were added and well stirred to observe the coagulated state, but only a small amount of precipitate was observed while it remained cloudy.
【００１０】[0010]
【発明の効果】以上の様に本発明によれば、これまで個
別に行っていた酸性廃液とアルカリ性廃液をそれぞれを
用いて処理でき、簡単であり、又、処理費用の廉価とな
る等の効果を奏するものである。As described above, according to the present invention, the acidic waste liquid and the alkaline waste liquid, which have been separately processed up to now, can be treated respectively, and the treatment is simple and the treatment cost is low. Is played.
Claims (1)
から硝酸塩類を分離し、残ったアルカリ性廃液を酸性廃
液で中和することを特徴とする廃液の処理方法。1. A method for treating a waste liquid, comprising separating nitrates from an alkaline waste liquid containing nitrates and metals and neutralizing the remaining alkaline waste liquid with an acidic waste liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14060796A JPH09290276A (en) | 1996-04-25 | 1996-04-25 | Waste liquid treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14060796A JPH09290276A (en) | 1996-04-25 | 1996-04-25 | Waste liquid treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09290276A true JPH09290276A (en) | 1997-11-11 |
Family
ID=15272651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14060796A Pending JPH09290276A (en) | 1996-04-25 | 1996-04-25 | Waste liquid treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09290276A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009224273A (en) * | 2008-03-18 | 2009-10-01 | Panasonic Corp | Method of processing waste electrolyte |
| CN103936190A (en) * | 2014-04-02 | 2014-07-23 | 超威电源有限公司 | Barium hydroxide treatment method with zero discharging of lead-acid storage battery wastewater |
-
1996
- 1996-04-25 JP JP14060796A patent/JPH09290276A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009224273A (en) * | 2008-03-18 | 2009-10-01 | Panasonic Corp | Method of processing waste electrolyte |
| CN103936190A (en) * | 2014-04-02 | 2014-07-23 | 超威电源有限公司 | Barium hydroxide treatment method with zero discharging of lead-acid storage battery wastewater |
| CN103936190B (en) * | 2014-04-02 | 2015-06-03 | 超威电源有限公司 | Barium hydroxide treatment method with zero discharging of lead-acid storage battery wastewater |
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