JPS6475093A - Treatment method of acidic waste liquid - Google Patents
Treatment method of acidic waste liquidInfo
- Publication number
- JPS6475093A JPS6475093A JP23300087A JP23300087A JPS6475093A JP S6475093 A JPS6475093 A JP S6475093A JP 23300087 A JP23300087 A JP 23300087A JP 23300087 A JP23300087 A JP 23300087A JP S6475093 A JPS6475093 A JP S6475093A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- waste liquid
- overflow
- acidic waste
- heavy metal
- 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.)
- Granted
Links
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
PURPOSE:To reduce the usage of Ca(OH)2, a secondary neutralization agent by making CO2 saturated overflow liquid, which is primarily neutralized by adding calcium carbonate to acidic waste liquid, in contact with air, discharging CO2, adding Ca(OH)2 and carrying out secondary neutralization. CONSTITUTION:Calcium carbonate is added to acidic waste liquid containing heavy metal group and primary neutralization is carried out. Then, the waste liquid is separated into concentrated liquid containing gypsum formed through a thickener and CO2 saturated overflow liquid. Said CO2 saturates overflow liquid is made in contact with air or N2 gas to discharge CO2. Further, Ca(OH)2 is added to the overflow liquid from which CO2 is discharged and secondary neutralization is carried out, and then said liquid is separated into concentrated liquid containing heavy metal precipitates and the overflow liquid through a thickener, and said concentrated liquid is treated with a filter press to separate the heavy metal precipitates as sludge.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23300087A JPH0741249B2 (en) | 1987-09-17 | 1987-09-17 | Treatment method of acidic waste liquid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23300087A JPH0741249B2 (en) | 1987-09-17 | 1987-09-17 | Treatment method of acidic waste liquid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6475093A true JPS6475093A (en) | 1989-03-20 |
JPH0741249B2 JPH0741249B2 (en) | 1995-05-10 |
Family
ID=16948237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23300087A Expired - Lifetime JPH0741249B2 (en) | 1987-09-17 | 1987-09-17 | Treatment method of acidic waste liquid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0741249B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991017958A1 (en) * | 1990-05-21 | 1991-11-28 | Steag Aktiengesellschaft | Process for treating waste water |
WO2002016272A1 (en) * | 2000-08-21 | 2002-02-28 | Csir | Water treatment method |
CN109851110A (en) * | 2018-12-20 | 2019-06-07 | 安徽楚江特钢有限公司 | A kind of steel band pickling waste waters processing method |
-
1987
- 1987-09-17 JP JP23300087A patent/JPH0741249B2/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991017958A1 (en) * | 1990-05-21 | 1991-11-28 | Steag Aktiengesellschaft | Process for treating waste water |
WO2002016272A1 (en) * | 2000-08-21 | 2002-02-28 | Csir | Water treatment method |
US6863819B2 (en) | 2000-08-21 | 2005-03-08 | Csir | Water treatment method |
CN109851110A (en) * | 2018-12-20 | 2019-06-07 | 安徽楚江特钢有限公司 | A kind of steel band pickling waste waters processing method |
Also Published As
Publication number | Publication date |
---|---|
JPH0741249B2 (en) | 1995-05-10 |
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