CN101885561A - Recombinant decorative material production waste water treatment process - Google Patents
Recombinant decorative material production waste water treatment process Download PDFInfo
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- CN101885561A CN101885561A CN 201010212734 CN201010212734A CN101885561A CN 101885561 A CN101885561 A CN 101885561A CN 201010212734 CN201010212734 CN 201010212734 CN 201010212734 A CN201010212734 A CN 201010212734A CN 101885561 A CN101885561 A CN 101885561A
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Abstract
The invention discloses a recombinant decorative material production waste water treatment process, which comprises the following steps in turn: pre-treating bleaching water and dyeing water, introducing the pretreated bleaching and dyeing water into an iron carbon tower, performing the coagulating sedimentation and mixing the bleaching and dyeing water with panel cleaning water; delivering the mixed waste water into a hydrolysis acidification tank by using a lifting pump to perform anaerobic treatment; delivering the effluent of the hydrolysis acidification tank to a secondary contact oxidization tank for aerobic treatment; delivering the effluent of the aerobic tank into a secondary sedimentation tank for sedimentation, concentrating sludge and returning part of effluent to the hydrolysis acidification tank; and introducing the effluent of the secondary sedimentation tank to a floataion tank to perform further decoloration and discharging the waste water reaching discharging standards. The invention also comprises the iron carbon tower designed according to process requirements. The iron carbon tower is formed by a round steel tank body, the top part of the tank body is sealed and is provided with a feed inlet and an exhaust hole, waste water enters the tank body from a water inlet, and the waste water is discharged from a water outlet after complete reaction. The process has the advantages of low treatment cost, good decoloration effect, small floor area, small single investment, stable operation and the like. The process was successfully used by a recombinant decorative material manufacturer in Jiangsu province and passed the local environmental protection inspection and acceptance.
Description
Technical field
The present invention relates to a kind of waste water treatment process, specifically is a kind of treatment process of recombinant decorative material production waste water.
Background technology
Recombinant decorative material is to be raw material with quick-growing plantation timber, becomes veneer through rotary-cut or slicing, again through bionical novel furniture and the building and ornament materials with precious this material texture and color and luster that are processed into.The waste water that produces in the recombinant decorative material production process is mainly from veneer bleaching, cleaning and dyeing workshop section, waste water composition and dyeing waste water are close, but index such as COD, colourity is 10～20 times of dyeing waste water, also contains the wooden element and the wood acid of a large amount of difficult for biological degradation.
Treatment method of printing and dying wastewater has physico-chemical process, biochemical process, electrochemical process etc.Treatment of dyeing wastewater adopts based on biochemistry more, turns materially auxilliary " physico-chemical pretreatment-biochemical treatment-materialization is handled again " combination process, and representational scheme has following several:
1, coagulating sedimentation-acidication-catalytic oxidation-air supporting
2, acidication-catalytic oxidation-coagulating sedimentation-biological carbon
3, acidication-UASB-SBR-air supporting
Mainly there are shortcomings such as working cost height, operating performance instability in these treatment process at present, and it all is the technology that provides at dyeing waste water.In recombinant decorative wood production wastewater treatment process, no matter adopt above any method, all can't reach emission standard, yet there are no real water treatment process method and the equipment that is fit to recombinant decorative wood factory effluent.
Summary of the invention
The general scale of recombinant decorative material manufacturing enterprise is less, the factory site disperses, the traditional dyeing water technology facility that no strength operation floor space is big, disposable to have high input, processing costs is high, at present, the dyeing waste-water of China most of recombinant decorative material manufacturing enterprise does not all carry out strict environmental protection treatment, pollutes bigger.
Technical problem to be solved by this invention is for recombinant decorative wood factory effluent provides that a kind of processing costs is low, good decolorizing effect, little, the disposable less investment of floor space, stable waste water treatment process.The present invention has been successfully applied to Jiangsu recombinant decorative material manufacturing enterprise, and has passed through local environmental protection inspection and acceptance.
At the waste water characteristic of different production processes in the recombinant decorative material production technique, the present invention has adopted following technical scheme:
1,, Javelle water and dyeing water are carried out pre-treatment earlier, through iron carbon tower, again behind the coagulating sedimentation and wash plate water and mix according to the separation of cloudy and clear principle;
2, enter hydrolysis acidification pool through mixed waste water by lift pump, carry out anaerobic treatment;
3, the hydrolysis acidification pool water outlet enters the two-stage biological contact oxidation aerobic treatment again;
4, the Aerobic Pond water outlet enters the second pond precipitation, and thickened sludge is back to acidication; Reflux ratio 50～100%, second pond water part back hydrolysis acidification pool, reflux ratio 50～100%;
5, the second pond water outlet enters air flotation pool further decolour processing, qualified discharge then.
Under the faintly acid condition, be ionogen with dyeing water, micro-electrolysis reaction and throwing out take place in iron carbon tower.Nascent state Fe in the anode generation
2+, the activity [H] that produces at negative electrode, all can with the many pollutent generation redox reactions in the waste water, make the macromole of many difficult degradations be decomposed into biodegradable small molecules.Obviously reduce the colourity of waste water and the biodegradability of raising waste water, and remove the COD more than 50%, help follow-up biochemical treatment.
Through pretreated dyeing water with wash plate water and mix the laggard hydrolysis acidification pool of going into, under the effect of anerobe, anoxic bacteria, further remove COD, colourity, and the biodegradability of waste water is provided.The residence time is controlled at 20h.The thickened sludge partial reflux of second pond to hydrolysis acidification pool, can be improved the acidication effect, help the abundant digestion of mud simultaneously, thereby realize the minimizing of mud.The water outlet of second pond is the partial reflux hydrolysis acidification pool also, and waste water is diluted, and reduces sludge loading.
The hydrolysis acidification pool water outlet enters biological contact oxidation pond, and biological contact oxidation pond is the core of biochemical reaction, and as the oxygen supply means, aeration mode adopts micro-hole aerator with roots blower.Catalytic oxidation is by forming microbial film on filler, improved hold-up biological in the aerobic treatment system, and the specific activity mud method load that can better withstand shocks sludge bulking can not take place.
The catalytic oxidation water outlet enters the second pond precipitation, the organism of the overwhelming majority and colourity obtain removing in the waste water, and is up to standard in order to guarantee stable water outlet, connects air-floating apparatus in the second pond back, in air-floating apparatus, add discoloring agent and coagulant aids, guarantee that water outlet COD, colourity are up to standard.Air-floating apparatus adopts pressurized dissolved air flotation, and the residence time is generally 30min.
The present invention is as a kind of novel treatment technology of recombinant decorative wood factory effluent, and its innovative point is:
1, the dyeing water of high density is carried out pre-treatment earlier, reduce processing cost;
2, use iron carbon tower as pretreatment technology, have, lower processing costs is arranged, be about 30% of common process than other pretreatment technology except that advantages such as COD, colourity and reduction biodegradabilities;
3, biochemical process adopts acidication and bio-contact oxidation, has anti-shock loading, stable, simple to operate, treatment effect is good and sludge output is few characteristics;
4, behind biochemistry, connect air-floating apparatus, guarantee effluent color dilution and COD stably reaching standard.Owing to after air supporting is connected on biochemical treatment, therefore, can't cause running cost too high.
5, working cost is low, is about 50～60% of common process.
Description of drawings
Fig. 1 is a process flow sheet of the present invention
Fig. 2 is an iron carbon tower structure synoptic diagram of the present invention
Embodiment
The present invention has been applied to the engineering of water treatment of certain recombinant decorative material manufacturing enterprise.Fig. 1 is the concrete waste water treatment process of implementing:
1, the dyeing waste-water A with high COD, high chroma enters iron carbon tower 1 through lift pump, and waste water in iron carbon tower micro-electrolysis reaction takes place.Under solutions of weak acidity, utilize the difference in Electrode Potential that exists between Fe and the C, carry out electrochemical reaction.Make that the chromophoric group of dyestuff is destroyed and remove colourity, and make the organism of part difficult degradation resolve into the small organic molecule of easy degraded, improve the biodegradability of waste water.The residence time, an amount of aeration by control waste water reach best removal effect; By suitable back flushing, add the continous-stable operation that acid activation guarantees iron carbon tower.1 water outlet of iron carbon tower is by adding suitable coagulating agent in a heavy pond 2 precipitations, and supernatant liquor enters the low plate water B that washes of equalizing tank 3 and concentration to be mixed.
2, mixed waste water enters hydrolysis acidification pool 4 through lift pump, under the effect of anerobe, the oxygen bacterium of holding concurrently, further the organism of difficult degradation such as long-chain, ring texture is hydrolyzed into short chain, straight chain hydrocarbon, improves the biodegradability of waste water.Hang combined stuffing, suitable water distribution in the hydrolysis acidification pool, increase stir, suitable modes such as the residence time, improve the removal effect of hydrolysis acidification pool to COD, be follow-up aerobic process Reduction of Students' Study Load.
3, the waste water of handling through acidication enters two-stage biological contact oxidation pond 5,6 and carries out aerobic treatment, hangs combined stuffing in the oxidation pond, carries out blast aeration by roots blower, the purpose of aeration: 1, provide vital movement required oxygen for aerobic microbiological; 2, waste water is stirred make water quality even.In biological contact oxidation pond, most of C0D is removed.
4, the contact-oxidation pool water outlet enters second pond 7 precipitations, bottom settlings sludge part back hydrolysis acidification pool, and return sludge ratio is 50～100%, part mud enters sludge thickener 9, and is pressed into the filter cake outward transport through pressure filter 10.Treat effluent part (flooding velocity 50～100%) is back to hydrolysis acidification pool.
5, the second pond water outlet connects air flotation pool 8, speculates coagulating agent, residual hardly degraded organic substance and the colourity of discoloring agent removal in air flotation pool.Guarantee the water outlet qualified discharge.
By this factory effluent of recombinant decorative of above-mentioned art breading, indexs such as COD, SS, colourity all can reach " textile dyeing and finishing industrial water pollution emission standard " (GB4287-92) primary standard of defined, and stable, processing costs is low.And passed through local environmental protection inspection and acceptance.
Fig. 2 is the iron carbon tower according to above-mentioned treatment process design;
This iron carbon tower is that circular steel tank constitutes, the tank body top seal, and establish dog-house 8 and venting port 9 at the top, tank interior is done rotproofing, makees the support filter plate in tank base, and establishes strainer head on filter plate, in order to guarantee the water distribution uniformity gas distribution.Prevent that waste water from phenomenons such as channel, short stream taking place in tank body, the filter plate perforate from the center to the edge, be provided with by close to thin.Add iron filings and other catalyzer 5 in tank body, the ratio of iron carbon filler is the best proportioning that obtains according to test, guarantees the high COD of removing, decolorizing effect.Tank body on the lower side portion separate manhole 4, guarantee that the replacing of iron filings and catalyzer thereof is convenient.Waste water enters tank body from water-in 2, and waste water can mix by line mixer and quantitative sulfuric acid before entering tank body, guarantees that waste water is at the faintly acid environment in the tank body.Fully discharging from water outlet 7 after the reaction.Discharge waste water and add a heavy pond 2 precipitate and separate of coagulant aids in Fig. 1 operational path through the pH value.In water inlet, carry out aeration oxygen replenishing from inlet mouth 3.Aeration oxygen replenishing mainly contains two purposes: 1, iron carbon tower is obviously got well and oxygen free condition the removal effect of COD under the situation of aerobic; 2, suitable aeration can play the effect to iron carbon filler agitation as appropriate, prevents iron carbon knot plate.Establish recirculation water outlet 6 on the top of tank body, the reflux ratio of control waste water, the design return line is to prevent iron carbon filler knot plate in order to improve the overcurrent speed of waste water in the iron carbon filler, improves effluent quality.Establish blow-off valve 1 in the bottom of tank body, can be used for bottom spoil disposal and emptying maintenance.
Claims (9)
1. recombinant decorative wood production wastewater treatment technology, this technology comprises following step:
1), Javelle water and dyeing water are carried out pre-treatment earlier, through iron carbon tower, again behind the coagulating sedimentation and wash plate water and mix according to the separation of cloudy and clear principle;
2) enter hydrolysis acidification pool through mixed waste water by sump pump, carry out anaerobic treatment;
3) the hydrolysis acidification pool water outlet is entering the two-stage biological contact oxidation aerobic treatment;
4) the Aerobic Pond water outlet enters the second pond precipitation, and thickened sludge is back to acidication, reflux ratio 50～100%, water part back hydrolysis acidification pool, reflux ratio 50～100%;
5) the second pond water outlet enters air flotation pool further decolour processing, qualified discharge then.
2. according to the iron carbon tower of the described waste water treatment process of claim 1 design.This iron carbon treatment unit is that circular steel tank constitutes, the tank body top seal, and dog-house 8 and venting port 9 are established in the top.Tank interior is done rotproofing, and tank base is made the support filter plate, adds iron filings and other catalyzer 5 in the tank body.Tank body portion on the lower side separates manhole 4, and waste water enters tank body from water-in 2, and fully discharge from water outlet 7 the reaction back, and in the time of water inlet, inlet mouth 3 carries out aeration oxygen replenishing.Recirculation water outlet 6 is established on the top of tank body, and blow-off valve 1 is established in the bottom of tank body.
3. recombinant decorative according to claim 1 wood production wastewater treatment technology in step 1 to dyeing water through the iron tower treatment unit after, with wash plate water and mix.
4. according to the claim 1 main body treatment process of acidication-catalytic oxidation, the mud of second pond, water part back hydrolysis acidification pool as recombinant decorative wood factory effluent.
5. connect air flotation pool according to claim 1 in the second pond back, in air flotation pool, add discoloring agent and coagulating agent.
6. iron carbon tower according to claim 2 is characterized in that: use strainer head and in the close outer arrangement mode of dredging, guarantee the water distribution uniformity gas distribution.
7. iron carbon tower according to claim 2 is characterized in that: establish refluxing opening 6 on tank body top, the overcurrent speed in filler of waste water is provided.
8. iron carbon tower according to claim 2 is characterized in that: the tank body top seal, and establish dog-house 8 and venting port 9 at the top.
9. iron carbon tower according to claim 2 is characterized in that: establish line mixer on the suction culvert.
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| CN 201010212734 CN101885561A (en) | 2010-06-28 | 2010-06-28 | Recombinant decorative material production waste water treatment process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102295389A (en) * | 2011-08-03 | 2011-12-28 | 句容宁武新材料发展有限公司 | Industrial waste water treating technology |
| CN102951773A (en) * | 2012-11-29 | 2013-03-06 | 贵州长绿科技有限公司 | Technique for treating beer waste water |
| CN103508617A (en) * | 2012-06-27 | 2014-01-15 | 中国石油化工股份有限公司 | Method for reducing petrochemical biological sludge and treatment device for petrochemical biological sludge |
| CN110902951A (en) * | 2019-12-02 | 2020-03-24 | 广西金科环境工程有限公司 | Continuous physical chemical biochemical energy-saving process for wood industry wastewater and artificial board wastewater |
| CN114315025A (en) * | 2021-12-27 | 2022-04-12 | 浙江升华云峰新材股份有限公司 | Treatment method and system for technical wood production wastewater |
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| CN2564554Y (en) * | 2002-08-29 | 2003-08-06 | 詹伯君 | Iron-carbon microelectrolysis fluidized bed equipment |
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| US20080210395A1 (en) * | 2005-06-29 | 2008-09-04 | Basf Aktiengesellschaft | Light-Colored Engineered Wood Boards |
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| CN2564554Y (en) * | 2002-08-29 | 2003-08-06 | 詹伯君 | Iron-carbon microelectrolysis fluidized bed equipment |
| US20080210395A1 (en) * | 2005-06-29 | 2008-09-04 | Basf Aktiengesellschaft | Light-Colored Engineered Wood Boards |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102295389A (en) * | 2011-08-03 | 2011-12-28 | 句容宁武新材料发展有限公司 | Industrial waste water treating technology |
| CN102295389B (en) * | 2011-08-03 | 2012-10-10 | 句容宁武新材料发展有限公司 | Industrial waste water treating technology |
| CN103508617A (en) * | 2012-06-27 | 2014-01-15 | 中国石油化工股份有限公司 | Method for reducing petrochemical biological sludge and treatment device for petrochemical biological sludge |
| CN103508617B (en) * | 2012-06-27 | 2015-08-19 | 中国石油化工股份有限公司 | The method of petrochemical industry reducing biological sludge and treatment unit thereof |
| CN102951773A (en) * | 2012-11-29 | 2013-03-06 | 贵州长绿科技有限公司 | Technique for treating beer waste water |
| CN110902951A (en) * | 2019-12-02 | 2020-03-24 | 广西金科环境工程有限公司 | Continuous physical chemical biochemical energy-saving process for wood industry wastewater and artificial board wastewater |
| CN114315025A (en) * | 2021-12-27 | 2022-04-12 | 浙江升华云峰新材股份有限公司 | Treatment method and system for technical wood production wastewater |
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