CN105271478A - Method used for treating chemical wastewater - Google Patents
Method used for treating chemical wastewater Download PDFInfo
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- CN105271478A CN105271478A CN201410279620.3A CN201410279620A CN105271478A CN 105271478 A CN105271478 A CN 105271478A CN 201410279620 A CN201410279620 A CN 201410279620A CN 105271478 A CN105271478 A CN 105271478A
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- sewage
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- inner electrolysis
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Abstract
The invention relates to a method used for treating chemical wastewater. According to the method, chemical waste water with a pH value adjusted to be lower than 6 is subjected to internal electrolysis and Fenton reagent oxidation so as to remove heavy metal ions, ammonia nitrogen compounds, and organic matters in the chemical waste water preliminarily, and degrade organic matters which are difficult for biochemical degradation into organic matters which are easy for biochemical degradation via oxidation degradation. The method is capable of improving biodegradable possibility of the organic matters obtained via pretreatment, and providing excellent preconditions for subsequent biochemical treatment.
Description
Technical field
The present invention relates to sewage treatment area, particularly relate to the treatment process of chemical engineering sewage.
Background technology
Chemical engineering sewage derives from each workshop section of chemical process, and the organic pollutant contained in the acrylic sewage that existing production technique is produced mainly contains: aromatic series and phenols, nitrile, alkanes and mercaptan (as propylmercaptan, sulfur alcohol), methyl acrylate, methylpropene sodium sulfonate etc.Wherein, several compounds that content is maximum are: succinonitrile, alkanes, own nitrile, sulfo-Ortho-Aminophenol.Although acrylic fiber chemical wastewater appearance colorless, transparent, the low molecule organic polymer containing bio-refractory, difficult natural subsidence, biodegradability extreme difference, belongs to bio-refractory sewage.And due to a large amount of existence of organonitrogen and ammonia nitrogen, cause adopting existing biochemical processing process can not reach good wastewater treatment efficiency.
In the treatment process of current chemical engineering sewage, the shortcoming of mainly depositing is, through the BOD of the pretreated sewage of the technique such as coagulation, air supporting
5/ COD (biochemical oxygen demand (BOD)/chemical oxygen demand (COD)) value is lower, be only about 0.5, bio-degradable poor ability, to cause in follow-up treating processes (such as, existing biological contact oxidation, activated sludge process, A/O treatment process etc.), be difficult to the emission standard reaching sewage disposal.The BOD of pretreated sewage
5when/COD value is only in the scope of 0.3-0.5, just can have a good biochemical degradation capability, so the bio-degradable ability how improving the sewage entered before subsequent biochemical treatment process is a problem in chemical engineering sewage field.
Summary of the invention
The invention provides a kind of chemical engineering sewage treatment process, in order to improve the bio-degradable of pretreated chemical engineering sewage.A kind of pretreatment process of chemical engineering sewage, comprise: the chemical engineering sewage being less than 6 is adjusted to pH value and carries out Inner electrolysis process and Fenton reagent oxide treatment, the oxidation operation of bio-refractory is decomposed into the organism of easy biochemical degradation in order to heavy metal ion, ammonia nitriding compound and the organism tentatively removed in acrylic fiber chemical wastewater.A kind for the treatment of process of chemical engineering sewage, comprise: the pre-treatment of chemical engineering sewage comprises: the acrylic fiber chemical wastewater being less than 6 is adjusted to pH value and carries out Inner electrolysis process and Fenton reagent oxide treatment, the oxidation operation of bio-refractory is decomposed into the organism of easy biochemical degradation in order to heavy metal ion, ammonia nitriding compound and the organism tentatively removed in chemical engineering sewage; The pH value of described pretreated acrylic fiber chemical wastewater is adjusted to 6 ~ 9; Carry out micro-biochemical treatment to the chemical engineering sewage that described pH value is 6 ~ 9, filtering membrane is effectively separated active sludge intermixture simultaneously.
In the present invention, owing to have employed the mode of Inner electrolysis and Fenton reagent oxide compound, greatly improve the bio-degradable through pretreated chemical engineering sewage, for follow-up biochemical treatment provides good prerequisite.
Accompanying drawing explanation
Fig. 1 is the schema of chemical engineering sewage process in the embodiment of the present invention.
Embodiment
Below in conjunction with Fig. 1, embodiments of the invention chemical engineering sewage treatment process being described, specifically comprising: step 201, acrylic fiber chemical wastewater is passed into a PH equalizing tank 101, Xiang Chizhong and adds acidic substance, regulating the pH value of acrylic fiber chemical wastewater for being less than 6.Step 202, the acrylic fiber chemical wastewater after step 201 processes is passed in Inner electrolysis bed, and the Inner electrolysis matter in sewage, organism are with the filler generation original battery electrochemistry reaction in Inner electrolysis bed and redox reaction.Step 203, is passed in Fenton reagent oxidation pond by the described sewage through Inner electrolysis process, carries out oxygenolysis to the organism in sewage.Step 204, the acrylic fiber chemical wastewater after step 203 processes is passed into the 2nd PH equalizing tank, regulates the pH value of described acrylic fiber chemical wastewater to be 6 ~ 9; Step 205, the acrylic fiber chemical wastewater through step 204 process is passed in batched membrane biochemical reactor and carries out micro-biochemical treatment to sewage and carry out filtration isolation to active sludge and other suspended substances.
Claims (6)
1. one kind processes the method for chemical engineering sewage, it is characterized in that, comprise: pre-treatment is carried out to chemical engineering sewage, described pre-treatment comprises: be adjusted to pH value the sewage being less than 6 and carry out Inner electrolysis process and Fenton reagent oxide treatment, in order to tentatively to remove heavy metal ion, ammonia nitriding compound and the organism in sewage; The pH value of described pretreated sewage is adjusted to 6 ~ 9; Micro-biochemical treatment is carried out to the sewage that described pH value is 6 ~ 9.
2. the method for claim 1, is characterized in that, carries out Fenton reagent oxide treatment after first carrying out Inner electrolysis process to described chemical engineering sewage.
3. method as claimed in claim 2, is characterized in that, the filler in described Inner electrolysis bed to be volume ratio be 1: 1 iron filings and activated carbon.Hydrogen peroxide in described Fenton reagent oxidation pond concentration be 800 ~ 1800 mg/litre, the concentration of ferrous ion is 200 ~ 800 mg/litre.
4. method as claimed in claim 3, is characterized in that, the filler in described Inner electrolysis-Fenton coupling mechanism to be volume ratio be 1: 1 iron filings and activated carbon.
5. method as claimed in claim 4, is characterized in that, the hydrogen peroxide in described Inner electrolysis-Fenton coupling mechanism concentration be 800 ~ 1800 mg/litre, the concentration of ferrous ion is 200 ~ 800 mg/litre.
6. the method for claim 1, is characterized in that, the described chemical engineering sewage that is 6 ~ 9 to pH value carries out micro-biochemical treatment and comprises: in batched membrane biochemical reactor, periodically carry out into water, anoxia stirring, aerobic aeration, water outlet four steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410279620.3A CN105271478A (en) | 2014-06-20 | 2014-06-20 | Method used for treating chemical wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410279620.3A CN105271478A (en) | 2014-06-20 | 2014-06-20 | Method used for treating chemical wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105271478A true CN105271478A (en) | 2016-01-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410279620.3A Pending CN105271478A (en) | 2014-06-20 | 2014-06-20 | Method used for treating chemical wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105271478A (en) |
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2014
- 2014-06-20 CN CN201410279620.3A patent/CN105271478A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160127 |
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| WD01 | Invention patent application deemed withdrawn after publication |