CN104692582A - Treatment method of acrylic fiber chemical wastewater - Google Patents
Treatment method of acrylic fiber chemical wastewater Download PDFInfo
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- CN104692582A CN104692582A CN201310651528.0A CN201310651528A CN104692582A CN 104692582 A CN104692582 A CN 104692582A CN 201310651528 A CN201310651528 A CN 201310651528A CN 104692582 A CN104692582 A CN 104692582A
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Abstract
The invention discloses a treatment method of acrylic fiber chemical wastewater. The acrylic fiber chemical wastewater with pH value adjusted to less than 6 is subjected to internal electrolysis and Fenton reagent oxidation treatment, so as to preliminarily remove heavy metal ions ammonia nitrogen compounds and organic compounds in acrylic fiber chemical wastewater, and oxidize and decompose refractory organic matters into biodegradable organic matters. The method of the invention can improve the biodegradability of the organic matters after the pretreatment, and provides good preconditions for the subsequent biochemical treatment.
Description
Technical field
The present invention relates to sewage treatment area, particularly relate to acrylic fiber chemical wastewater treatment process.
Background technology
Acrylic fiber chemical wastewater derives from each workshop section of acrylic fiber production process process, and the organic pollutant contained in the acrylon sewage that existing acrylic fiber production process technique produces 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 acrylic fiber chemical wastewater, 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 acrylic fiber chemical wastewater field.
On the other hand, when current body eutrophication is on the rise, the ammonia nitrogen removal index of acrylic fiber chemical wastewater is had to the trend promoted further, so the process to acrylic fiber chemical wastewater, not only to consider, the degraded of raw material that toxicity in sewage is larger, also to consider the further removal of ammonia atmosphere.Me.mbrane bioreactor of the prior art adopts hollow fiber microfiltration membrane, under the operation scheme of SBR (sequence asks formula activated sludge process of having a rest), good ammonia nitrogen removal effect can be obtained, but the hollow fiber microfiltration membrane supplied in the market is due on the high side, cause the processing cost of me.mbrane bioreactor very high.
Summary of the invention
The invention provides a kind of acrylic fiber chemical wastewater treatment process, in order to improve the bio-degradable of pretreated acrylic fiber chemical wastewater.A kind of pretreatment process of acrylic fiber chemical wastewater, comprise: 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 acrylic fiber chemical wastewater.
A kind for the treatment of process of acrylic fiber chemical wastewater; comprise: the pre-treatment of acrylic fiber chemical wastewater 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 acrylic fiber chemical wastewater;
The pH value of described pretreated acrylic fiber chemical wastewater is adjusted to 6-9; Carry out micro-biochemical treatment to the acrylic fiber chemical wastewater 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 acrylic fiber chemical wastewater, for follow-up biochemical treatment provides good prerequisite.
Below by two embodiments, technical solution of the present invention is specifically described.
Embodiment
EXAMPLE l
Step 1, acrylic fiber chemical wastewater is passed into a PH equalizing tank, Xiang Chizhong adds acidic substance, regulates the pH value of acrylic fiber chemical wastewater for being less than 6.In step 1, by adding sulfuric acid in pond, regulating the pH value of acrylic fiber chemical wastewater, making pH value keep being less than 6, being preferably pH value=3.5.In sulfuric acid dosing tank 106, sulfuric acid is housed, is connected with a PH equalizing tank, according to program setting in advance, in trend pH value equalizing tank, add sulfuric acid, according to sewage situation regulate pH value be less than 6 desirable value.
Step 2, the acrylic fiber chemical wastewater after step 1 processes far enters in Inner electrolysis bed, and the Inner electrolysis matter in sewage, organism are with filler generation room, cell electrochemical reaction and the redox reaction in Inner electrolysis bed.
In step 2, in Inner electrolysis bed, the volume ratio of filler is iron filings and the activated carbon of 1:1.In acid condition, there is electrochemical reaction generation Fe at the anode place in Inner electrolysis pond in Fe
2+, when the volume ratio of iron filings and gac is 1:1, Fe in solution can be ensured
2+content, improve in Inner electrolysis pond, middle the carried out process to acrylic fiber chemical wastewater.Separating in interior village in bed can tentatively heavy-metal ion removal, ammonia nitriding compound and organism, and be 1-3 hour in the Inner electrolysis reaction times at this place, reaction conditions is normal temperature and pressure.Because the principle of work in Inner electrolysis pond is prior art, do not repeat them here.
Step 3, is passed in Fenton reagent oxidation pond by the described sewage through Inner electrolysis process, carries out oxygenolysis to the organism in sewage.
In step 3, add hydrogen peroxide concentration be 800-1800 mg/litre, the concentration adding the ferrous ion in rear sewage is 200-800 mg/litre, and the reaction times is 1-2 hour, and reaction conditions is normal temperature and pressure.In hydrogen peroxide dosing tank, hydrogen peroxide is housed, in ferrous sulfate dosing tank, ferrous sulfate is housed, be all connected with Fenton reagent oxidation pond, in trend Fenton reagent oxidation pond, pass into hydrogen peroxide and the ferrous sulfate of aequum according to pre-set program.
Step 4, 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;
In described step 4, by regulating pool side to enter hydroxide hook to the 2nd PH, adjustment pH value is 6-9.Sodium hydroxide is, in mouth medicine-chest, hydroxide hook is housed, and is connected with the 2nd PH equalizing tank, according to program setting in advance, in trend pH value equalizing tank, adds sodium hydroxide, is adjusted to the arbitrary value that pH value is 6-9 as required.
Step 5, the acrylic fiber chemical wastewater through step 4 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.
In steps of 5, the filtering membrane in described batched membrane biochemical reactor is non-woven material, is preferably non-woven plate-type film.This filtering membrane effectively can return and cut the clean effect that the mattress such as active sludge and nitrated mattress class both can improve the water outlet of batched membrane biochemical reactor, effectively remains the mushrooms such as nitrifier again for reactor.
Embodiment 2
Step 1, acrylic fiber chemical wastewater is passed into a PH equalizing tank, Xiang Chizhong adds acidic substance, regulates the pH value of acrylic fiber chemical wastewater for being less than 6.
Step 2, is passed in Fenton reagent oxidation pond by the sewage flowed out from step 1, carries out oxygenolysis to the organism in sewage.
Step 3, the acrylic fiber chemical wastewater after step 2 processes is passed into interior village and separates in 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 4, the acrylic fiber chemical wastewater after step 3 processes is passed into the 2nd PH equalizing tank, regulates the pH value of described acrylic fiber chemical wastewater to be 6-9.
Step 5, the acrylic fiber chemical wastewater through step 4 process is passed in batched membrane biochemical reactor and carries out micro-biochemical treatment to sewage and utilize filtering membrane to retain characteristic being effectively separated active sludge intermixture.
The treating processes of embodiment 2 and the treating processes of embodiment 1 basically identical, and the related device in corresponding steps is also identical, repeats no more in this detailed process to each step of embodiment 2.After the feature of the preprocessing process of embodiment 2 first carries out Fenton reagent oxidation, carry out Inner electrolysis react the organic pollutant removal rate known in embodiment 2 in Fenton reagent oxidation pond and Inner electrolysis bed.
The above-mentioned embodiment of the present invention and embodiment are only used to contribute to understanding the present invention, are not construed as limiting the invention, and in the scope that technical solution of the present invention and claim thereof are stated, all can realize object of the present invention.
Claims (9)
1. the pretreatment process of an acrylic fiber chemical wastewater, its spy is just just, 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, in order to tentatively to remove heavy metal ion, ammonia nitriding compound and the organism in acrylic fiber chemical wastewater, and the oxidation operation of bio-refractory is decomposed into the organism of easy biochemical degradation.
2. the method for claim 1; it is characterized in that: after Inner electrolysis process is first carried out to described acrylic fiber chemical wastewater, carry out Fenton reagent oxide treatment; wherein: described Inner electrolysis process comprises: pH value is adjusted to the acrylic fiber chemical wastewater being less than 6 and is passed in Inner electrolysis bed, there is original battery electrochemistry reaction and redox reaction in the heavy metal ion in above-mentioned acrylic fiber chemical wastewater, ammonia nitriding compound and organism in Inner electrolysis bed; Described Fenton reagent oxide treatment comprises: be passed in Fenton reagent oxidation pond by the acrylic fibers synthetic fibre chemical engineering sewage through described Inner electrolysis process, carry out oxygenolysis to organism.
3. the method for claim 1; it is characterized in that; Inner electrolysis process is carried out after Fenton reagent oxide treatment is first carried out to described acrylic fiber chemical wastewater; wherein: described Fenton reagent oxide treatment comprises: pH value is adjusted to the acrylic fiber chemical wastewater being less than 6 and far enters in Fenton reagent oxidation pond, oxygenolysis is carried out to organism; Described interior village is separated process and is comprised: be passed in Inner electrolysis bed by the acrylic fiber chemical wastewater through described Fenton reagent oxide treatment, and galvanic cell village chemical reaction and redox reaction occur in Inner electrolysis bed for the heavy metal ion in described acrylic fiber chemical wastewater, ammonia nitriding compound and organism.
4. as claimed in claim 2 or claim 3 method, is characterized in that, described Fenton reagent oxidation pond, middle hydrogen peroxide concentration be 800-1800 mg/litre, the concentration of ferrous ion is 200-800 mg/litre.
5. as claimed in claim 2 or claim 3 method, its spy is just just, iron filings and the activated carbon of to be volume ratio the be 1:1 of the filler in described Inner electrolysis bed.
6. the method for claim 1, is characterized in that: described Inner electrolysis process and Fenton reagent oxide treatment comprise: pH value is adjusted to the acrylic fiber chemical wastewater being less than 6 and is passed in Inner electrolysis Fenton coupling mechanism and carries out Inner electrolysis process and Fenton reagent oxide treatment simultaneously.
7. method as claimed in claim 6, is characterized in that, iron filings and the activated carbon of to be volume ratio the be 1:1 of the filler in described Inner electrolysis Fenton coupling mechanism.
8. method as claimed in claim 6, is characterized in that, in described Inner electrolysis Fenton coupling mechanism hydrogen peroxide concentration be 800-1800 mg/litre, the concentration of ferrous ion is 200-800 mg/litre.
9. the method for claim 1, is characterized in that, by adding sulfuric acid, the pH value of described acrylic fiber chemical wastewater is adjusted to 3.5.
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| CN201310651528.0A CN104692582A (en) | 2013-12-05 | 2013-12-05 | Treatment method of acrylic fiber chemical wastewater |
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| CN201310651528.0A CN104692582A (en) | 2013-12-05 | 2013-12-05 | Treatment method of acrylic fiber chemical wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104926046A (en) * | 2015-07-01 | 2015-09-23 | 广东灵捷制造化工有限公司 | Micro-electrolytic treatment process for treating acrylic fiber wastewater |
| CN104986920A (en) * | 2015-08-21 | 2015-10-21 | 广东灵捷制造化工有限公司 | Microelectrolysis treatment system for treating acrylon wastewater |
| CN114426368A (en) * | 2020-09-18 | 2022-05-03 | 中国石油化工股份有限公司 | Treatment method and application of ammoximation wastewater |
-
2013
- 2013-12-05 CN CN201310651528.0A patent/CN104692582A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104926046A (en) * | 2015-07-01 | 2015-09-23 | 广东灵捷制造化工有限公司 | Micro-electrolytic treatment process for treating acrylic fiber wastewater |
| CN104986920A (en) * | 2015-08-21 | 2015-10-21 | 广东灵捷制造化工有限公司 | Microelectrolysis treatment system for treating acrylon wastewater |
| CN114426368A (en) * | 2020-09-18 | 2022-05-03 | 中国石油化工股份有限公司 | Treatment method and application of ammoximation wastewater |
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Application publication date: 20150610 |