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JPS6475093A - Treatment method of acidic waste liquid - Google Patents

Treatment method of acidic waste liquid

Info

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
Application number
JP23300087A
Other languages
Japanese (ja)
Other versions
JPH0741249B2 (en
Inventor
Hiromi Mochida
Kengo Nishimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Metal Corp
Original Assignee
Mitsubishi Metal Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Metal Corp filed Critical Mitsubishi Metal Corp
Priority to JP23300087A priority Critical patent/JPH0741249B2/en
Publication of JPS6475093A publication Critical patent/JPS6475093A/en
Publication of JPH0741249B2 publication Critical patent/JPH0741249B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • 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.
JP23300087A 1987-09-17 1987-09-17 Treatment method of acidic waste liquid Expired - Lifetime JPH0741249B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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