CN104326622A - Treatment method of chemical fiber textile dyeing wastewater - Google Patents
Treatment method of chemical fiber textile dyeing wastewater Download PDFInfo
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- CN104326622A CN104326622A CN201410552023.3A CN201410552023A CN104326622A CN 104326622 A CN104326622 A CN 104326622A CN 201410552023 A CN201410552023 A CN 201410552023A CN 104326622 A CN104326622 A CN 104326622A
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Abstract
The invention relates to a treatment method of chemical fiber textile dyeing wastewater, belonging to the field of wastewater treatment methods. The treatment method comprises the following steps: after impurities are removed from wastewater through a grid, the wastewater naturally flows into a conditioning tank and is elevated with a pump to enter a reaction tank while adding an alkali to regulate pH value and adding a one-off coagulating agent, the reaction effluent water is subjected to primary precipitation and sludge-water separation, the sludge is sent into a sludge thickening tank, the effluent water flows into a facultative anaerobic tank, the wastewater from the facultative anaerobic tank flows into an aerobic tank to be subjected to aeration oxidation, the wastewater enters a coagulative precipitation tank from the aerobic tank and is subjected to coagulation reaction by adding a secondary coagulating agent, the precipitation effluent water is discharged after reaching the standard, the physicochemical sludge is sent to the sludge thickening tank, and the sludge is thickened, subjected to dry-pressing with a chamber filter press and sent out for landfilling. By adopting the biological pretreatment, facultative anaerobic-aerobic biochemical treatment and physico-chemical treatment, the treatment method has the characteristics of simple technique, low operating cost, favorable treatment effect and the like, is convenient to operate, is an effective method for treating high-concentration chemical fiber textile dyeing comprehensive wastewater, and is a new way for treating the wastewater at present.
Description
Technical field
The present invention relates to a kind for the treatment of process of chemical fibre textile dyeing waste-water, belong to method of wastewater treatment field.
Background technology
Before the nineties in 20th century, the biodegradability of China's dyeing waste-water is higher, and COD concentration is everlasting 800 below mg/ L, and adopt traditional biochemical treatment system, water outlet can qualified discharge.But over nearly 20 years, along with the fast development of man made fiber fabric, the rise of terylene artificial silk, dyeing factory application Alkali reduction technology is more prevalent, researchs and proposes new problem to dyeing wastewater treatment process.Owing to adding alkali decrement waste water, biochemical treatment system does not originally reach processing requirements, and this just processes dyeing comprehensive wastewater in the urgent need to the high efficiency treatment process of one.
Therefore, study the treatment process being applicable to chemical fibre textile dyeing waste-water that a kind of technique is simple, easy to operate, working cost is low, treatment effect is good and have certain necessity.
Summary of the invention
The present invention aims to provide the treatment process being applicable to chemical fibre textile dyeing waste-water that a kind of technique is simple, easy to operate, working cost is low, treatment effect is good.
The treatment process of chemical fibre textile dyeing waste-water of the present invention, comprises the following steps:
Waste water is by certainly flowing into equalizing tank after grid removing impurity, then promote with pump and enter reaction tank, add alkali regulate PH and add a coagulating agent simultaneously, reaction water outlet enters primary deposition and carries out mud-water separation, mud delivers to sludge thickener, water outlet flows into oxygen compatibility pool, waste water out flows into Aerobic Pond afterwards from oxygen compatibility pool, carry out gas explosion oxidation, waste water carries out coagulative precipitation tank from Aerobic Pond, coagulating is carried out by adding second coagulation agent, standard water discharge discharge after precipitation, materialized mud delivers to sludge thickener, mud press dry with chamber filter press after concentrated, transport outward landfill again.
Preferably, a coagulating agent of the present invention is lime powder, and add-on is 100-120mg/L.
Preferred, second coagulation agent of the present invention is Tai-Ace S 150, and add-on is 20-30mg/L.
Preferred further, alkali of the present invention is sodium hydroxide, and pH value controls between 7-8.
Further preferred, aeration rate of the present invention is 8L/h, and oxidation time is 30h.
Treatment process of the present invention, adopts integrated process, effectively processes chemical fibre textile dyeing comprehensive wastewater.
The water quality characteristic of chemical fibre textile dyeing comprehensive wastewater: chemical fibre textile dyeing factory application Alkali reduction technology, the benzene series such as PVA slurry, terephthalic acid (TA or its sodium salt), dyestuff, New-type adjuvant, naphthalene system, anthraquinone system and aniline, nitrobenzene bio-refractory organism is made to enter waste water in a large number, add difficulty to process, the feature of this type of waste water is: basicity is large, Pollutant levels are high, biodegradability is poor.
The COD value of this kind of waste water is very high, physico-chemical process and biochemical process conbined usage is adopted to be process dyeing comprehensive wastewaters, materialization coagulating sedimentation has decolouring and removes the strong feature of suspended substance ability, the coagulating agent simultaneously added also can play certain adjustment PH effect, biochemical process is strong to deliquescent organic matter removal ability, in this process, because the principal pollutant in waste water are insoluble terephthalic acid and various dispersed dye etc. under pH6-7 condition, therefore comprehensive wastewater is dyeed first through coagulating sedimentation, can effectively remove organic pollutant colourity and adjust ph, and improve the biodegradability of waste water, for subsequent biochemical process creates favorable conditions.For the water quality characteristics of waste water, adopt mud method anoxic-aerobic process as the biochemical processing process of this project, organism broken material being easy to biochemical degradation with being oxidized to molecular weight in oxygen compatibility pool of bio-refractory, improve the biochemical efficiency of follow-up Aerobic Pond, Aerobic Pond mud can be back to oxygen compatibility pool simultaneously, reduces the quantity discharged of excess sludge.
Treatment process is that waste water is by certainly flowing into equalizing tank after grid removing impurity, then promote with pump and enter reaction tank, add sodium hydroxide adjust ph between 7-8 simultaneously, with the lime powder coagulating agent adding 100-120mg/L, reaction water outlet enters primary deposition and carries out mud-water separation, mud delivers to sludge thickener, water outlet flows into oxygen compatibility pool, utilize the effect of oxygen bacterium of holding concurrently, improve the biodegradability of waste water, reduce the colourity of waste water, waste water out flows into Aerobic Pond afterwards from oxygen compatibility pool, adopt new product of environment protect ZH variable microporous aerator, aeration rate is 8L/h, oxidation time is 30h, make full use of the effect of active sludge, remove most pollutent, reduce COD and BOD5, then precipitate, amount of activated sludge reflux is to oxygen compatibility pool and Aerobic Pond, excess sludge delivers to sludge thickener, waste water carries out coagulative precipitation tank from Aerobic Pond, coagulating is carried out by the second coagulation agent Tai-Ace S 150 adding 20-30mg/L, standard water discharge discharge after precipitation, materialized mud delivers to sludge thickener, mud press dry with chamber filter press after concentrated, transport outward landfill again.
Treatment process of the present invention, adopt bioid pre-treatment, again through oxygen-aerobic treatment of holding concurrently, finally use materializing strategy, there is the features such as technique is simple, easy to operate, working cost is low, treatment effect is good, being the effective ways administering high density chemical fibre textile dyeing comprehensive wastewater, is the new way of administering such waste water at present.
Embodiment
Embodiment one:
Waste water is by certainly flowing into equalizing tank after grid removing impurity, then promote with pump and enter reaction tank, add sodium hydroxide adjust ph between 7-8 simultaneously, with the lime powder coagulating agent adding 100-120mg/L, reaction water outlet enters primary deposition and carries out mud-water separation, mud delivers to sludge thickener, water outlet flows into oxygen compatibility pool, utilize the effect of oxygen bacterium of holding concurrently, improve the biodegradability of waste water, reduce the colourity of waste water, waste water out flows into Aerobic Pond afterwards from oxygen compatibility pool, adopt new product of environment protect ZH variable microporous aerator, aeration rate is 8L/h, oxidation time is 30h, make full use of the effect of active sludge, remove most pollutent, reduce COD and BOD5, then precipitate, amount of activated sludge reflux is to oxygen compatibility pool and Aerobic Pond, excess sludge delivers to sludge thickener, waste water carries out coagulative precipitation tank from Aerobic Pond, coagulating is carried out by the second coagulation agent Tai-Ace S 150 adding 20-30mg/L, standard water discharge discharge after precipitation, materialized mud delivers to sludge thickener, mud press dry with chamber filter press after concentrated, transport outward landfill again.
Embodiment two: treatment effect
Use the treatment process of chemical fibre textile dyeing waste-water of the present invention, produce chemical fibre textile dyeing waste water to certain chemical fibre factory and process, result as shown in Table-1.
(1) just heavy to water treatment effect
Waste water COD value after coagulation is just heavy drops to 625-1375mg/L by 2500-5500mg/L, and clearance is 75%.
(2) biochemical to water treatment effect
Anaerobic-aerobic biochemical process to water treatment effect in Table-1
From table-1, waste water is after anaerobic-aerobic treatment, and itself COD and BOD5 total removal rate is respectively 80% and 92.5%; Waste water BOD5/COD value after oxygen process of holding concurrently brings up to 0.380, and wastewater biodegradability improves greatly, and oxygen of holding concurrently serves conclusive effect to raising wastewater biodegradability.
(3) coagulating sedimentation is to water treatment effect
Bio-chemical effluent COD value after coagulating kinetics is down to below 100mg/L by 125-275mg/L, and all the other indexs also all reach textile dyeing and finishing industry and go out primary standard in pollution discharge standard.
Claims (5)
1. the treatment process of chemical fibre textile dyeing waste-water, comprises the following steps:
Waste water is by certainly flowing into equalizing tank after grid removing impurity, then promote with pump and enter reaction tank, add alkali regulate PH and add a coagulating agent simultaneously, reaction water outlet enters primary deposition and carries out mud-water separation, mud delivers to sludge thickener, water outlet flows into oxygen compatibility pool, waste water out flows into Aerobic Pond afterwards from oxygen compatibility pool, carry out gas explosion oxidation, waste water carries out coagulative precipitation tank from Aerobic Pond, coagulating is carried out by adding second coagulation agent, standard water discharge discharge after precipitation, materialized mud delivers to sludge thickener, mud press dry with chamber filter press after concentrated, transport outward landfill again.
2. the treatment process of chemical fibre textile dyeing waste-water as claimed in claim 1, it is characterized in that a described coagulating agent is lime powder, add-on is 100-120mg/L.
3. the treatment process of chemical fibre textile dyeing waste-water as claimed in claim 1, it is characterized in that described second coagulation agent is Tai-Ace S 150, add-on is 20-30mg/L.
4. the treatment process of chemical fibre textile dyeing waste-water as claimed in claim 1, it is characterized in that described alkali is sodium hydroxide, pH value controls between 7-8.
5. the treatment process of chemical fibre textile dyeing waste-water as claimed in claim 1, it is characterized in that described aeration rate is 8L/h, oxidation time is 30h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410552023.3A CN104326622A (en) | 2014-10-17 | 2014-10-17 | Treatment method of chemical fiber textile dyeing wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410552023.3A CN104326622A (en) | 2014-10-17 | 2014-10-17 | Treatment method of chemical fiber textile dyeing wastewater |
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| CN201410552023.3A Pending CN104326622A (en) | 2014-10-17 | 2014-10-17 | Treatment method of chemical fiber textile dyeing wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI586609B (en) * | 2016-05-27 | 2017-06-11 | 友達光電股份有限公司 | System for Treating Organic Wastewater and Slurry |
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2014
- 2014-10-17 CN CN201410552023.3A patent/CN104326622A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI586609B (en) * | 2016-05-27 | 2017-06-11 | 友達光電股份有限公司 | System for Treating Organic Wastewater and Slurry |
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Application publication date: 20150204 |
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