CN105174640A - Biochemical treatment process for paint-producing wastewater - Google Patents
Biochemical treatment process for paint-producing wastewater Download PDFInfo
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- CN105174640A CN105174640A CN201510649107.3A CN201510649107A CN105174640A CN 105174640 A CN105174640 A CN 105174640A CN 201510649107 A CN201510649107 A CN 201510649107A CN 105174640 A CN105174640 A CN 105174640A
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Abstract
The invention discloses a biochemical treatment process for paint-producing wastewater. The biochemical treatment process for the paint-producing wastewater does not require physiochemical pretreatment and can effectively reduce a COD (chemical oxygen demand) value of the wastewater. The treatment process comprises steps as follows: (1), a pre-adjustment reaction; (2), an anaerobic reaction; (3), a single-stage aerobic reaction; (4), a two-stage aerobic reaction; (5) precipitation. The biochemical treatment process has the characteristics of no need of physiochemical treatment, low treatment cost, high treatment efficiency, good treatment effect and the like.
Description
Technical field
The invention belongs to waste water treatment process field, especially a kind of biochemical processing process of painting waste water.
Background technology
Containing high-concentration hardly-degradable organism in painting waste water, the features such as composition is complicated, toxicity is large, biodegradability is poor, water quality and quantity fluctuation is large.At present conventional treatment technology be materializing strategy or materialization pre--technique that combines of biochemical treatment.As the patent No. be 200310122764.x patent discloses a kind of organic wastewater treatment process, its processing step is: (a) physico-chemical pretreatment: organic waste water is passed into light electrolysis reduction pond, under blast aeration stirring action, make organic waste water generation iron-carbon micro-electrolysis react, in the organic waste water after electrolysis, add hydrogen peroxide carry out Fenton oxidation, then make organic waste water enter coagulative precipitation tank and add NaOH and PAM to carry out coagulating sedimentation; B () anaerobic hydrolysis-acidification process: the organic waste water through physico-chemical pretreatment is passed into anaerobic acidification hydrolytic tank, drops into effectively compound microbial in pond, makes above-mentioned organic waste water carry out effectively hydrolyzing acidifying; (c) TCBS system process: the organic waste water through anaerobic hydrolysis-acidification is passed into TCBS reactor, rabbit effectively compound microbial simultaneously, organic waste water is mixed with the high density returned sluge after denitrogenation, above-mentioned mixed solution is passed into main aeration tank and completes final organic matter degradation and nitrifying process.Materializing strategy technology in this technique adopts the techniques such as coagulation, microwave, electrolysis.The medicament that coagulation process consumption is a large amount of, produces a large amount of materialized muds simultaneously, and process cost of disposal is high, and after coagulating treatment, waste water usually can not qualified discharge, needs to process further.Microwave, electrolysis, usually need before and after process to regulate pH, consume a large amount of medicaments, running cost is high, and there is the problem that processed waste water is difficult to qualified discharge equally.Therefore this waste water treatment process, also exists operation expense in materialization (in advance) treating processes high, complicated operation, and the problems such as COD value weak effect.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of without the need to physico-chemical pretreatment, effectively can reduce the biochemical processing process of the painting waste water of COD value in waste water.
In order to achieve the above object, the biochemical processing process of a kind of painting waste water designed by the present invention, its processing technological flow is:
(1) preconditioning reaction: painting waste water squeezes into equalizing tank through lift pump after being discharged into collecting tank, wastewater pH is regulated by acid adding/alkali, pH value is made to remain between 6.0-9.0, anaerobic reactor water outlet is utilized to regulate waste water COD, the value of COD is made to be in 5, between 000-100,000mg/L, the temperature of the waste water wherein in equalizing tank controls at 33-40 DEG C;
(2) anaerobic reaction: equalizing tank waste water enters anaerobic mud bed reactor, organic substance in anaerobion degrading waste water in granule sludge, be translated into biogas, the temperature of the waste water wherein in anaerobic mud bed reactor controls at 33-40 DEG C, and volumetric loading controls at 5-20kg/m
3arrange high effective three phase separator at anaerobic mud bed reactor top, realize effective separation of gas-liquid-solid, settling of granular sludge is retained in anaerobic mud bed reactor, reduce the anaerobic sludge in water outlet and suspended solids, gas is then overflowed the recycling of triphase separator for the energy;
(3) one-level aerobic reaction: anaerobic effluent enters the further aerobic degradation of aerobic carrier current movable bed reaction tank, the microbial film that carrier adheres to and suspended sludge Synergistic degradation pollutent, reduce the COD of waste water, dissolved oxygen wherein in aerobic carrier current movable bed reaction tank controls at 0.5-5.0mg/L, and volumetric loading controls at 0.5-2.0kg/m
3;
(4) secondary aerobic reaction: in the water outlet of aerobic carrier current movable bed reaction tank, undegradable pollutent enters activated sludge tank and degrades further, and the dissolved oxygen wherein in activated sludge tank controls at 1.0-4.0mg/L, and volumetric loading controls at 0.5-1.0kg/m
3;
(5) precipitate: activated sludge tank water outlet enters settling tank and realizes mud-water separation, part sludge reflux is to aerobic carrier current movable bed reaction tank, the concentration of microorganism in aerobic carrier current movable bed reaction tank is made to remain on 2000-6000mg/L, its return sludge ratio is 50-200%, another part mud discharges settling tank, and Chinese effluent is to garden sewage network.
As preferably, in described equalizing tank, adopt hydrochloric acid, sodium hydroxide to regulate the pH value of waste water, make the pH value of waste water remain on 7.2-7.8.
As preferably, in described equalizing tank, waste water COD controls at 20,000-25,000mg/l.
As preferably, in described anaerobic mud bed reactor, temperature controls at 35-38 DEG C.
As preferably, in described anaerobic mud bed reactor, volumetric loading controls at 5-6kg/m
3.
As preferably, in described aerobic carrier current movable bed reaction tank, dissolved oxygen controls at 2.5-3.0mg/L, and volumetric loading controls at 1.5kg/m
3.
As preferably, in described activated sludge tank, dissolved oxygen controls at 2.5-3mg/L, and volumetric loading controls at 0.8kg/m
3.
As preferably, in described settling tank, return sludge ratio is 80-100%.
Beneficial effect of the present invention:
1, this art breading painting waste water is without the need to physico-chemical pretreatment process, saves a large amount of medicaments, has saved investment running cost.
2, the anaerobic granular sludge bed reactor for treatment painting waste water of this technique employing, processing efficiency is high, creates a large amount of biogas, can be used for energy recovery, reduces the load of follow-up aerobic treatment simultaneously, reduces aeration energy consumption and specific resistance to filtration cost.
3, after present invention process process, waste water can qualified discharge to garden pipe network or in line requirement, long-time running is stablized, and solves a difficult problem for painting scale wastewater treatment, achieves target and the lifting of environmental benefit that industry energy conservation reduces discharging.
The biochemical processing process of a kind of painting waste water of the present invention; By preconditioning pond, pre-treatment is carried out to waste water, then pour pretreated waste water into anaerobic mud bed reactor, by anerobe, decomposition oxidation is carried out to the organic impurity in waste water, then pouring the waste water after process into aerobic carrier current movable bed reaction tank and activated sludge tank successively, by aerobic bacteria, oxygenolysis is carried out to the organic impurity in waste water, by anaerobic and aerobic reaction, the impurity in waste water is progressively decomposed, finally enter settling tank, by the contamination precipitation in waste water, waste water is made to arrive emission standard.
Therefore, the features such as it has without the need to physico-chemical pretreatment, processing cost is low, processing efficiency is high, treatment effect is good.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.：
Embodiment one:
As shown in Figure 1, first waste water enter collecting tank, squeezes into equalizing tank through lift pump, adds liquid caustic soda and regulate wastewater pH 7.5, add settling tank water outlet and regulate COD to be 20,000mg/L.Equalizing tank waste water enters anaerobic granular sludge bed reactor after being heated to 35 DEG C, and its wastewater temperature is 35 DEG C, and its load is 5kg/m
3, the biogas of generation is used for heating produces steam to reclaim heat energy.Anaerobic treatment water outlet enters aerobic carrier current movable bed reaction tank, and COD load is 1.5kg/m
3, dissolved oxygen concentration is 2.5mg/L, by aerobic flowing reactive bed by the organic substance decomposing in waste water.The water outlet of aerobic carrier current movable bed reaction tank enters activated sludge tank, and COD load is 0.8kg/m
3, dissolved oxygen concentration is 3.0mg/L, and sludge concentration is 3g/L, the residual organic substances in waste water is decomposed.Activated sludge tank water outlet enters settling tank, by the contamination precipitation in waste water, process waste water up to standard is entered pipe network.
Shown in the former water of painting waste water and the effluent quality after art breading of the present invention see the following form:
Embodiment two:
As shown in Figure 1, first waste water enter collecting tank, squeezes into equalizing tank through lift pump, adds liquid caustic soda and regulate wastewater pH 7.8, add settling tank water outlet and regulate COD to be 25,000mg/L.Equalizing tank waste water enters anaerobic granular sludge bed reactor after being heated to 33 DEG C, and its wastewater temperature is 38 DEG C, and its load is 5.5kg/m
3, the biogas of generation is used for heating produces steam to reclaim heat energy.Anaerobic treatment water outlet enters aerobic carrier current movable bed reaction tank, and COD load is 1.5kg/m
3, dissolved oxygen concentration is 3.0mg/L, by aerobic flowing reactive bed by the organic substance decomposing in waste water.The water outlet of aerobic carrier current movable bed reaction tank enters activated sludge tank, and COD load is 0.8kg/m
3, dissolved oxygen concentration is 3.0mg/L, and sludge concentration is 3g/L, the residual organic substances in waste water is decomposed.Activated sludge tank water outlet enters settling tank, by the contamination precipitation in waste water, process waste water up to standard is entered pipe network.
Shown in the former water of painting waste water and the effluent quality after art breading of the present invention see the following form:
Embodiment three:
As shown in Figure 1, first waste water enter collecting tank, squeezes into equalizing tank through lift pump, adds liquid caustic soda and regulate wastewater pH 7.2, add settling tank water outlet and regulate COD to be 30,000mg/L.Equalizing tank waste water enters anaerobic granular sludge bed reactor after being heated to 40 DEG C, and its wastewater temperature is 38 DEG C, and its load is 6.0kg/m
3, the biogas of generation is used for heating produces steam to reclaim heat energy.Anaerobic treatment water outlet enters aerobic carrier current movable bed reaction tank, and COD load is 1.5kg/m
3, dissolved oxygen concentration is 2.8mg/L, by aerobic flowing reactive bed by the organic substance decomposing in waste water.The water outlet of aerobic carrier current movable bed reaction tank enters activated sludge tank, and COD load is 0.8kg/m
3, dissolved oxygen concentration is 3.0mg/L, and sludge concentration is 3g/L, the residual organic substances in waste water is decomposed.Activated sludge tank water outlet enters settling tank, by the contamination precipitation in waste water, process waste water up to standard is entered pipe network.
Shown in the former water of painting waste water and the effluent quality after art breading of the present invention see the following form:
Claims (8)
1. a biochemical processing process for painting waste water, its processing technological flow is:
(1) preconditioning reaction: painting waste water squeezes into equalizing tank through lift pump after being discharged into collecting tank, wastewater pH is regulated by acid adding/alkali, pH value is made to remain between 6.0-9.0, anaerobic reactor water outlet is utilized to regulate waste water COD, the value of COD is made to be in 5, between 000-100,000mg/L, the temperature of the waste water wherein in equalizing tank controls at 33-40 DEG C;
(2) anaerobic reaction: equalizing tank waste water enters anaerobic mud bed reactor, organic substance in anaerobion degrading waste water in granule sludge, be translated into biogas, the temperature of the waste water wherein in anaerobic mud bed reactor controls at 33-40 DEG C, and volumetric loading controls at 5-20kg/m
3arrange high effective three phase separator at anaerobic mud bed reactor top, realize effective separation of gas-liquid-solid, settling of granular sludge is retained in anaerobic mud bed reactor, reduce the anaerobic sludge in water outlet and suspended solids, gas is then overflowed the recycling of triphase separator for the energy;
(3) one-level aerobic reaction: anaerobic effluent enters the further aerobic degradation of aerobic carrier current movable bed reaction tank, the microbial film that carrier adheres to and suspended sludge Synergistic degradation pollutent, reduce the COD of waste water, dissolved oxygen wherein in aerobic carrier current movable bed reaction tank controls at 0.5-5.0mg/L, and volumetric loading controls at 0.5-2.0kg/m
3;
(4) secondary aerobic reaction: in the water outlet of aerobic carrier current movable bed reaction tank, undegradable pollutent enters activated sludge tank and degrades further, and the dissolved oxygen wherein in activated sludge tank controls at 1.0-4.0mg/L, and volumetric loading controls at 0.5-1.0kg/m
3;
(5) precipitate: activated sludge tank water outlet enters settling tank and realizes mud-water separation, part sludge reflux is to aerobic carrier current movable bed reaction tank, the concentration of microorganism in aerobic carrier current movable bed reaction tank is made to remain on 2000-6000mg/L, its return sludge ratio is 50-200%, another part mud discharges settling tank, and Chinese effluent is to garden sewage network.
2. the biochemical processing process of a kind of painting waste water according to claim 1, is characterized in that: in described equalizing tank, adopts hydrochloric acid, sodium hydroxide to regulate the pH value of waste water, makes the pH value of waste water remain on 7.2-7.8.
3. the biochemical processing process of a kind of painting waste water according to claim 1, is characterized in that: in described equalizing tank, waste water COD controls at 20,000-25,000mg/l.
4. the biochemical processing process of a kind of painting waste water according to claim 1, is characterized in that: in described anaerobic mud bed reactor, temperature controls at 35-38 DEG C.
5. the biochemical processing process of a kind of painting waste water according to claim 1, is characterized in that: in described anaerobic mud bed reactor, volumetric loading controls at 5-6kg/m
3.
6. the biochemical processing process of a kind of painting waste water according to claim 1, is characterized in that: in described aerobic carrier current movable bed reaction tank, dissolved oxygen controls at 2.5-3.0mg/L, and volumetric loading controls at 1.5kg/m
3.
7. the biochemical processing process of a kind of painting waste water according to claim 1, it is characterized in that: in described activated sludge tank, dissolved oxygen controls at 2.5-3mg/L, and volumetric loading controls at 0.8kg/m
3.
8. the biochemical processing process of a kind of painting waste water according to claim 1, is characterized in that: in described settling tank, and return sludge ratio is 80-100%.
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| CN108918811A (en) * | 2018-07-27 | 2018-11-30 | 玖龙纸业（沈阳）有限公司 | A kind of test method that detection chemical industry auxiliary material influences anaerobic-aerobic |
| CN110436709A (en) * | 2019-08-14 | 2019-11-12 | 浙江巨能环境工程有限公司 | A kind of high concentration waste water of cis-anhydride processing unit and processing method |
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Address after: 314500 No. 1500 rice road, Indus street, Tongxiang, Zhejiang Patentee after: Zhejiang Juneng Environmental Engineering Co Ltd Address before: 314500, No. 1500 rice road, Indus street, Tongxiang, Zhejiang, Jiaxing Patentee before: ZHEJIANG JUNENG CO., LTD. |