CN1063469A - Method of wastewater treatment - Google Patents
Method of wastewater treatment Download PDFInfo
- Publication number
- CN1063469A CN1063469A CN 92100458 CN92100458A CN1063469A CN 1063469 A CN1063469 A CN 1063469A CN 92100458 CN92100458 CN 92100458 CN 92100458 A CN92100458 A CN 92100458A CN 1063469 A CN1063469 A CN 1063469A
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- CN
- China
- Prior art keywords
- waste water
- electrocoagulation
- treatment
- electrolysis
- consumption
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- 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.)
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Abstract
A kind of suitable dyes, the method for treatment of dyeing wastewater is to contain Fe (OH)
3Or Al (OH)
3The electrocoagulation waste residue as coagulating agent, be used for waste water and stir the precipitation pre-treatment, reduce the COD of waste water, thereby reduce the electrisity consumption of electrocoagulation, also reduced the consumption of battery lead plate.
Description
The present invention relates to the wastewater treatment of environment protection, be particularly useful for the wastewater treatment of DYE PRODUCTION or textile printing and dyeing.
The waste water that printing and dyeing, dyestuffs industries produce contains a large amount of objectionable impuritiess, and directly discharging can cause serious environmental to pollute.Usually adopting electrocoagulation to carry out purification of waste water handles.Electrocoagulation is to adopt iron or aluminium sheet as electrode, and the dirt in the waste water is as ionogen.Under the direct current effect, battery lead plate explains ferrous (aluminium) ion decomposites hydroxide ion and hydrogen ion in the waste water, the dirt in the waste water is carried out oxidation, reduction, and ferrous (aluminium) ion and hydroxide ion are combined to the colloid of oxyhydroxide.This colloid is good flocculation agent, can make the dirt coacervating large particle in the waste water.Hydrogen ion obtains electronics and generates hydrogen when negative pole moves, produce a large amount of bubbles, adheres to come-up with the dirt particle that condenses in the waste water, makes the objectionable impurities in the waste water become scum silica frost, is convenient to get rid of.Waste water through the electrocoagulation descum discharges after filtering.But the electrisity consumption of electrocoagulation increases along with harmful substance contents in the waste water and straight line rises, and during as the COD of waste water≤500mg/L, the electrisity consumption of wastewater treatment per ton is 0.15～0.4KWh; During COD=500～1000mg/L, the electrisity consumption of wastewater treatment per ton is 0.4～0.8KWh; During COD＞1000～3000mg/L, the electrisity consumption of wastewater treatment per ton is 0.8～1.8KWh.Because the concentration of narmful substance in the waste water of printing and dyeing or DYE PRODUCTION is higher, so the consumption of the electrisity consumption of electrocoagulation and pole plate is also very big.How reducing electrisity consumption and pole plate consumption is to reduce the key that electrocoagulation is handled the waste water cost.
The objective of the invention is to select a kind of inexpensive coagulating agent, and use this coagulating agent and handle waste water, reduce the COD of waste water.This coagulating agent can be used as the pretreated coagulating agent that electrocoagulation is handled waste water.
Electrocoagulation is handled the Fe(OH that is combined in the waste water process)
3Or Al(OH)
3It is good flocculation agent.In the electrocoagulation process, have only part to carry out cohesion with objectionable impurities, a large amount of Fe(OH is still arranged)
3Or Al(OH)
3Discharge with waste residue.Common this waste residue is dropped, and needization are taken great amount of manpower and expense.Implementation of the present invention be exactly this waste residue that produces when utilizing electrocoagulation to handle waste water as coagulating agent, be used for stirring the precipitation pretreated waste water, use the electrolysis of electrolysis main frame then, again discharging after filtering or reclaim.
The invention has the advantages that and utilize electrocoagulation to handle the waste residue that waste water produces,, be used for wastewater treatment, can reduce the COD of waste water, the electrisity consumption of electrolysis host process waste water and pole plate consumption are greatly reduced as coagulating agent.The cost of wastewater treatment is saved in the treatment of wastes with processes of wastes against one another, has found outlet for the electrocoagulation waste residue simultaneously.
Embodiment 1, administers printing and dyeing or waste water from dyestuff, and the waste residue that power taking agglomeration process waste water produces is rendered in printing and dyeing or the waste water from dyestuff as coagulating agent, stirs the precipitation pre-treatment.The injected volume of this coagulating agent is that the waste residue that produces when electrocoagulation is handled waste water all drops in the pretreated waste water.Churning time is 2-5 minute, then water is entered settling tank or in situ precipitation 10～15 minutes, and the supernatant liquor that reaches discharging standards discharges after filtering or reclaims below standard waste water, carries out electrocoagulation and handles, and promptly carries out electrolysis with the electrolysis main frame.Because waste water reduces the COD of waste water through stirring the precipitation pre-treatment greatly, thereby the electrisity consumption of electrocoagulation and pole plate consumption also greatly reduce.If the COD of waste water is 1500mg/L, through stirring post precipitation, press COD clearance 70% and calculate, the COD of the objectionable impurities in the waste water reduces to 450mg/L, at this moment uses electrolysis host process waste water again, and electrisity consumption is 0.15～0.4kwh/t.Through the waste water of electrolysis host process, reach discharging standards, filter back discharging or reuse.
Electrocoagulation waste residue of the present invention also can be used as coagulating agent and the PH conditioning agent that the air supporting method is handled printing and dyeing, waste water from dyestuff.
Claims (1)
1, a kind of dyestuff, the treatment process of dyeing waste water, waste water is by electrolysis main frame electrolysis treatment, and discharging after filtering or reclaim is characterized in that before the electrolysis main frame carries out electrolysis treatment, sets up and stirs the precipitation pre-treatment, and add and contain Fe (OH) as flocculation agent
3Or Al (OH)
3The electrocoagulation waste residue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92100458 CN1063469A (en) | 1992-01-19 | 1992-01-19 | Method of wastewater treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92100458 CN1063469A (en) | 1992-01-19 | 1992-01-19 | Method of wastewater treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1063469A true CN1063469A (en) | 1992-08-12 |
Family
ID=4938588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92100458 Pending CN1063469A (en) | 1992-01-19 | 1992-01-19 | Method of wastewater treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1063469A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106115988A (en) * | 2016-08-03 | 2016-11-16 | 上海昱沛环保科技有限公司 | A kind of method processing waste emulsified mixture |
| CN106830503A (en) * | 2017-01-13 | 2017-06-13 | 安徽联科水基材料科技有限公司 | A kind of industrial dye waste water reuse technology |
| CN112723554A (en) * | 2020-11-05 | 2021-04-30 | 云南锦淮环保科技有限公司 | Composite biological water purifying agent and preparation method thereof |
-
1992
- 1992-01-19 CN CN 92100458 patent/CN1063469A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106115988A (en) * | 2016-08-03 | 2016-11-16 | 上海昱沛环保科技有限公司 | A kind of method processing waste emulsified mixture |
| CN106830503A (en) * | 2017-01-13 | 2017-06-13 | 安徽联科水基材料科技有限公司 | A kind of industrial dye waste water reuse technology |
| CN112723554A (en) * | 2020-11-05 | 2021-04-30 | 云南锦淮环保科技有限公司 | Composite biological water purifying agent and preparation method thereof |
| CN112723554B (en) * | 2020-11-05 | 2023-02-28 | 云南锦淮环保科技有限公司 | Composite biological water purifying agent and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |