CN101671098A - Method of treating high-concentration metaformaldehyde waste water into reuse water - Google Patents
Method of treating high-concentration metaformaldehyde waste water into reuse water Download PDFInfo
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Abstract
The invention discloses a method of treating high-concentration metaformaldehyde waste water into reuse water, relating to a treatment technology of high-concentration metaformaldehyde waste water. The pH of metaformaldehyde waste water of which the formaldehyde content is 4000mg/L into 3.0-4.0, then metaformaldehyde waste water is sent into an anaerobic hydrolysis composite reactor combining activated sludge with biomembrane and an aerobic composite reactor; at last, a double-membrane method is adopted to treat to ensure that effluent reaches the standard of urban wastewater recycling industrial water quality, thus serving as recirculated cooling water. The invention strengthens removal of high-concentration formaldehyde, COD, trioxymethylene, divinylene oxide and other pollutants in high-concentration metaformaldehyde waste water by biological treatment, can effectively resist impact from violent water yield and water quality, and has the advantages of high system starting speed, small foam of the aerobic composite reactor, low operation cost, stable and effective treatment and zero discharge of waste water.
Description
Technical field
A kind of the wastewater treatment of high density polyoxymethylene is become the method for reuse water, relate to a kind of treatment process of high density polyoxymethylene waste water.Belong to the technical field of waste water processing in the environment project.
Background technology
At present, domestic research and application only limit to the processing of formaldehyde waste water, do not relate to the processing of the polyoxymethylene waste water that contains trioxymethylene and dioxolane.Organic pollutant mainly comprises formaldehyde, methyl alcohol, benzene, trioxymethylene, dioxolane etc. in the high density polyoxymethylene waste water, and wherein formaldehyde can directly react with the intravital protein of microorganism, DNA, RNA, causes microbial death or suppresses its biological activity.When concentration of formaldehyde reaches 150mg/L, microorganism active be former activated half, surpass 200mg/L after microorganism active almost completely be suppressed; The toxic organic compound that contains (for example: the respiration of inhibition microorganism in biological process benzene); The polymkeric substance of formaldehyde such as trioxymethylene, dioxolane is again comparatively stable organism, is difficult to be utilized by microorganism.Therefore these characteristics of this high density polyoxymethylene waste water determine it can not directly carry out biochemical treatment, and water outlet COD and the very difficult qualified discharge of concentration of formaldehyde, more can't realize reuse.
The treatment process of formaldehyde waste water can be divided into physico-chemical process and biological process substantially.Physico-chemical process has Fenton method, photocatalytic oxidation, wet oxidation process, dioxide peroxide oxidation style, electrochemical process technology etc.Formaldehyde waste water belongs to high concentrated organic wastewater, adopts materialization processing cost height fully.In the practical application, the materialization treatment process is used for Wastewater Pretreatment with the influent quality that improves the biological treatment section be used for advanced treatment and make waste water reach emission standard more.Adopt the bioremediation cost relatively low but technology is still immature, generally adopt A/O (anoxic/aerobic), the A-SBR (technology of anaerobism-SBR) or adopt the Carrousel oxidation ditch process.Although these bioprocess technologies can effectively be removed waste water COD and formaldehyde, but because formaldehyde waste water has characteristics such as the high and variation water quality of toxic organic compound content is bigger, treat effluent exists still that microorganism active is subject to suppress, COD is difficult to that up to standard, formaldehyde treated effect is subject to that water quality is impacted and problem that the need long period can recover.
Summary of the invention
The objective of the invention is to disclose a kind of method that the wastewater treatment of high density polyoxymethylene is become reuse water, handle hard-degrading high concentrated polyoxymethylene waste water with method of the present invention and have low cost, high-level efficiency, shock resistance and the few advantage of system's fast, aerobic compound reactor foam of startup, and finally handle the back reuse by two embrane methods and do circulation, water coolant is realized zero release.
For reaching above-mentioned purpose, the present invention includes polyoxymethylene wastewater treatment and middle water reuse two-stage process, need not the last period in concentration of formaldehyde is the high density polyoxymethylene waste water of 4000mg/L, to add dilution water, but directly adopt materialization pretreatment method to regulate the waste water quality and the water yield, carrying out life assemblage then handles, water recovering process is that the polyoxymethylene waste water after handling is entered air supporting successively in back one section, multi-medium filtering and active carbon filtration, remove colloid wherein, suspended substance, organism and iron ion etc., adopt the two embrane methods of CMF microfiltration membrane and RO reverse osmosis membrane to separate and desalination at last, make water outlet reach " urban sewage reutilization process water water quality " (GB/T19923-2005) after the standard reuse do recirculated cooling water.Be characterized in that the last period, water technology comprised the steps,
A, physico-chemical pretreatment
Concentration of formaldehyde is that 4000mg/L high density polyoxymethylene waste water at first enters equalizing tank, adds alkali and stir in this pond, makes the even pH of waste water quality transfer to 3.0～4.0, then with 30～45m
3/ h is pumped to cooling tower and is cooled to normal temperature, and cooling tower water outlet spontaneous current enters the anaerobic hydrolysis compound reactor.
B, anaerobic hydrolysis complex reaction
Earlier in the anaerobic hydrolysis compound reactor, add sodium hydroxide with volume pump, guarantee that anaerobic hydrolysis compound reactor pH value is 5.5～7.5, the ball-type filler that bunchiness hangs is housed in the anaerobic hydrolysis compound reactor, the bottom is provided with and promotes fully contacting of microorganism and sewage, strengthen the 30r/min low speed impeller of mass transfer, exhalant region is provided with the suspended layer (it act as and holds back active sludge to keep the activated sludge concentration in the reactor) that identical ball-type filler is formed.Then according to active sludge: polyoxymethylene waste water=1: 500 part of mass ratio adds active sludge, and active sludge cultivated in the domestication process according to formaldehyde special efficacy degraded bacterial classification: active sludge=mass ratio dropped into formaldehyde special efficacy degraded bacterial classification in 1: 50, formation has the active sludge of Degradation Formaldehyde advantage, and this active sludge under anaerobic can bear and degrade up to the formaldehyde of 6000mg/L concentration.The biofilm microorganisms concentration of the anerobe of apposition growth is greater than 8.0g/L on the ball-type filler, active sludge microorganism concentration is greater than 4.0g/L, when always microorganism concn is greater than 12.0g/L, polymkeric substance with formaldehyde such as trioxymethylene, dioxolane in the waste water under the outer lytic enzyme catalysis of the born of the same parents of the interior microorganisms of reactor is converted into simple organism such as formic acid, acetate, anaerobic hydrolysis compound reactor hydraulic detention time is controlled to be 4～12h, can guarantee that the water side concentration of formaldehyde is lower than 400mg/L, flows into aerobic compound reactor automatically.
C, aerobic complex reaction
Aerobic compound reactor is divided into one-level aerobic reactor and the aerobic compound reactor of secondary:
The efficient micropore aeration pipe of import has been installed in the one-level aerobic reactor has been carried out aeration, a large amount of micropores are uniformly distributed in pipeline, and pneumatic blending intensity reaches 1.6m
3Air/hm
3More than the water.In cultivating the acclimation sludge process, drop into active sludge and formaldehyde special efficacy degraded bacterial classification with B step same amount, make biological respinse efficiently, carry out formaldehyde, COD, BOD in effective degrading waste water apace
5Deng pollutent, when active sludge microorganism concentration during greater than 4.0g/L, waste water is introduced in the one-level aerobic reactor, when COD concentration is lower than 800mg/L, enters the aerobic compound reactor of secondary.
The aerobic compound reactor of secondary has been installed the efficient micropore aeration pipe of import equally and has been carried out aeration, and add with identical suspension ball-type filler fast rotational under the pneumatic blending effect of B step, make air, sewage, microbial film three alternate turbulent fluctuation diffusions and energy exchange aggravation, biomembranous Surface Renewal rate and adsorption surface area increase, and COD and BOD further degrade
5In cultivating the acclimation sludge process, drop into active sludge and formaldehyde special efficacy degraded bacterial classification with B step same amount, the microorganism concn of apposition growth is greater than 3.0g/L on microbial film, suspension active sludge microorganism concentration is greater than 4.0g/L in the reactor, when always microorganism concn is greater than 7.0g/L, the hydraulic detention time of aerobic compound reactor is controlled to be 24～36 hours, the interior total alkalinity (CO of aerobic compound reactor this moment
3 2-Meter) up to (organic pollutant in aerobic compound reactor, degrade final product be carbonic acid gas, carbonate, bicarbonate radical etc.) more than the 1000mg/L, guarantee that water outlet COD is lower than 100mg/L, flow into second pond at last, by reflux pump directly with the activity sludge reflux of second pond bottom to the anaerobic hydrolysis compound reactor, when control of reflux ratio is 0.5～1 times, guarantee that the pH value of anaerobic hydrolysis compound reactor is 5.5～7.5.The second pond water outlet enters water recovering process in two sections.
When formaldehyde content in the high density polyoxymethylene waste water surpasses 4000mg/L or short-term when surpassing 6000mg/L; cause aerobic compound reactor bubble-related issues; go on foot aerobic compound reactor at C and add microorganism active excitation agent; dosage is controlled at 10～20mg/L; the time of adding is 8-12h every day; added continuously 3-5 days, and guaranteed the high reactivity of active sludge biological flocculence and microorganism.
The above-mentioned formaldehyde special efficacy degraded bacterial classification that drops in cultivating the acclimation sludge process is to be produced by Shanghai Zhongyao Environmental Protection Industrial Co., Ltd., and model is TJJQ, is a kind of can bearing and the amphimicrobe of degrading high concentration formaldehyde.
Middle water reuse segment process
Waste water supernatant liquor after second pond is realized mud-water separation enters two embrane method pretreatment units, adopts reaction air supporting, multi-medium filtering and active carbon filtration technology successively.By colloid, suspended substance, organism and the iron ion etc. in the pre-treatment removal waste water, handle by CMF microfiltration membrane and the two embrane method materializations of RO reverse osmosis membrane then, separate and desalination, guarantee water quality reach " urban sewage reutilization process water water quality " (GB/T19923-2005) after the standard reuse do recirculated cooling water.
Beneficial effect of the present invention:
1, the present invention is adjusted to 3.0～4.0 by physico-chemical pretreatment with wastewater pH, need not thin up and directly enters the anaerobic hydrolysis compound reactor, can effectively improve the water yield and water quality impact resistance.
2, the present invention by with basicity in the second pond be activity sludge reflux more than the 1000mg/L to the anaerobic hydrolysis compound reactor, guarantee that the pH value of anaerobic hydrolysis compound reactor is 5.5～7.5, reduced consumption to alkali, provide cost savings.
3, because the floating stuffing that anaerobic hydrolysis compound reactor water side is provided with, hold back active sludge to keep the activated sludge concentration in the reactor, at the reactor start-up initial stage, the activated sludge concentration of inoculation is maintained by the mud return-flow system, make the anaerobe film apposition growth on the bio-carrier rapid, overcome a long difficult problem of polyoxymethylene anaerobic waste water reactor start-up time.
4, owing in anaerobic hydrolysis compound reactor and aerobic compound reactor, all add the Degradation Formaldehyde dominant bacteria, and active sludge and biologic packing material coexistence, the biomass of growing on the filler is increased, and enriched biophase in the reactor, increased microorganism concn, thereby improved biological overall resistance to poison and anti-water quality impact capacity, can bear concentration of formaldehyde, guaranteed that the water outlet concentration of formaldehyde is lower than 400mg/L up to 6000mg/L.
5, adopt microorganism active excitation agent to play a significant role in the biological treatment system abnormal conditions, make microflora recover treatment effect rapidly, avoided formaldehyde waste water traditional biological treatment system after abnormal problems such as mud poisoning, foam sharp increase take place, to need a long-time difficult problem of recovering.
6, the present invention adopts the anaerobic and aerobic compound reactor, makes can obtain higher volumetric loading, thereby floor space is few, and it to be low to have running cost by whole microorganism concn height, to the stabilizing effective advantage of processing of the hard-degrading high concentrated polyoxymethylene waste water of acidity.
7, the settling tank water outlet is handled through two membrane separating, effluent quality reach " urban sewage reutilization process water water quality " (GB/T19923-2005) after the standard reuse do recirculated cooling water, really realize zero release.
Description of drawings
Fig. 1 is a process flow sheet of the present invention
Embodiment
See also Fig. 1, technology of the present invention does not add any dilution water.Certain polyoxymethylene factory high density polyoxymethylene waste water water yield is 1800m
3/ d.Its wastewater source is: a, monomer workshop waste water, water yield 28.6m
3/ h; B, polymerization plant waste water, water yield 13m
3/ h; C, sanitary wastewater, water yield 7.7m
3/ h; D, early-stage rainwater, water yield 96m
3/ time;
A carries out physico-chemical pretreatment earlier
With a, b, c, d waste water everywhere at first enter equalizing tank, and recording formaldehyde content is 1500～4000mg/L, adds alkali in this pond wastewater pH is transferred to about 3.5, stir to make water quality even again, adopt pump with 30～45m
3/ h delivers to the cooling tower cooling, satisfies the requirement of subsequent technique water temperature, and the water outlet of cooling tower flows into the anaerobic hydrolysis compound reactor automatically.
B, the anaerobic hydrolysis complex reaction
Polyoxymethylene waste water through the A physico-chemical pretreatment enters the anaerobic hydrolysis compound reactor.By being the active sludge more than the 1000mg/L from second pond backflow basicity, the pH value that has guaranteed the anaerobic hydrolysis compound reactor is 5.5～7.5.Bunchiness hangs patent of invention product (ZL01112857.7)---the ZYZX-108 type ball-type filler that Shanghai Zhongyao Environmental Protection Industrial Co., Ltd. produces is installed in the anaerobic hydrolysis compound reactor.The a large amount of anerobe microbial films energy and the waste water thorough mixing of apposition growth on the filler, biofilm microorganisms concentration is greater than 8.0g/L.Reactor bottom is provided with 30r/min low speed impeller, promotes fully the contacting of microorganism and sewage, mass transfer.Simultaneously at the reactor exhalant region floating stuffing district is set, it act as holds back active sludge to keep the activated sludge concentration in the reactor.Biofilm biomass on the hanging filler becomes positive correlation with microorganism concn in the water body, because the existence of suspension active sludge makes that biofilm biomass is than the biofilm biomass height of common anaerobic fixed film reactor hanging filler on the filler.Active sludge microorganism concentration is greater than 4.0g/L, and total microorganism concn is greater than 12.0g/L, because biofilm development at filling surface, caking phenomenon can not occur.Hydraulic detention time is controlled to be 4～12 hours, guarantees that the water outlet concentration of formaldehyde is lower than 400mg/L.Polymkeric substance with formaldehyde such as trioxymethylene, dioxolane in the waste water under the outer lytic enzyme catalysis of the born of the same parents of the interior microorganisms of reactor is converted into simple organism such as formic acid, acetate, for follow-up aerobe is handled the organic substrate that preparation is easily utilized by microorganism.Enter aerobic complex reaction more successively, to remove the residual organic substances in the waste water.Simultaneously, anaerobic hydrolysis meets and adds nitrogen, phosphorus in the reactor needs, and dosage is according to BOD
5: N: P=100: calculate at 5: 1.
C, aerobic complex reaction
Aerobic compound reactor is divided into two-stage, and the one-level aerobic reactor adopts the micro-pore aeration activated sludge process, the efficient micropore aeration pipe of import has been installed has been carried out aeration, and a large amount of micropores are uniformly distributed in pipeline, and pneumatic blending intensity reaches 1.6m
3Air/hm
3More than the water.In cultivating the acclimation sludge process, drop into formaldehyde special efficacy degraded bacterial classification, make biological respinse efficiently, carry out apace, effectively formaldehyde, COD, the BOD in the degrading waste water
5Deng pollutent, suspension active sludge microorganism concentration is greater than 4.0g/L in the reactor, and when waste water COD concentration was lower than 800mg/L, waste water flowed into the aerobic compound reactor of secondary automatically.The aerobic compound reactor of secondary has been installed the efficient micropore aeration pipe of import equally and has been carried out aeration, and add our unit's patent of invention product (ZL01112857.7)-ZYZX-108 type ball-type filler, the ball-type filler fast rotational under the pneumatic blending effect that suspends, make air, sewage, microbial film three alternate turbulent fluctuation diffusions and energy exchange aggravation, biomembranous Surface Renewal rate and adsorption surface area increase, and COD and BOD further degrade
5The microorganism concn of apposition growth is greater than 3.0g/L on the microbial film, and suspension active sludge microorganism concentration is greater than 4.0g/L in the reactor, and total microorganism concn is greater than 7.0g/L, and hydraulic detention time is controlled to be 24～36 hours.The activity sludge reflux of second pond is to anaerobism or aerobic compound reactor, and control of reflux ratio guarantees that at 0.5～1 times the pH of anaerobic hydrolysis compound reactor is 5.5～7.5.When waste water COD concentration was lower than 100mg/L, the second pond water outlet entered middle water recovering process;
Cultivate input formaldehyde special efficacy degraded bacterial classification in the acclimation sludge process in B, C step, formaldehyde special efficacy degraded bacterial classification is to be that TJJQ a kind of can bear and the amphimicrobe of degrading high concentration formaldehyde by the model that Shanghai Zhongyao Environmental Protection Industrial Co., Ltd. produces, and input amount is a formaldehyde special efficacy degraded bacterial classification: active sludge=1: 50 part of mass ratio;
The adding of the active excitation of mentioned microorganism agent is because when formaldehyde content surpasses 4000mg/L in the acid hard-degrading high concentrated polyoxymethylene waste water or short-term when surpassing 6000mg/L; to cause active sludge to be poisoned and reduction of bio-carrier microorganism active and generation foam; for guaranteeing the high reactivity of active sludge biological flocculence and microorganism in this case; can add microorganism active excitation agent at aerobic compound reactor; can effectively improve active sludge flocculence and the adhesivity of microorganism on bio-carrier; the active sludge cohesion performance improves the sludge concentration that makes its volume index reduce and improve the second pond bed mud; and then the activated sludge concentration of raising system, and the raising of activated sludge concentration helps the raising of microorganism concn on the bio-carrier.It is the molysite of TJYJD that the model of being produced by Shanghai Zhongyao Environmental Protection Industrial Co., Ltd. is adopted in present embodiment microorganism active excitation agent, and dosage is 10～20mg/L, and the time of adding is 12h every day, adds continuously 3 days.
Waste water water reuse workshop section during supernatant liquor enters after second pond is realized mud-water separation, adopt two membrane separating technologies, water reuse pre-treatment in carrying out earlier: adopt reaction air supporting, multi-medium filtering and active carbon filtration technology successively, by colloid, suspended substance, organism and the iron ion etc. in the pre-treatment removal waste water, separate and desalination by CMF microfiltration membrane and RO reverse osmosis membrane then, guarantee water quality reach " urban sewage reutilization process water water quality " (GB/T19923-2005) after the standard reuse do recirculated cooling water.
This treatment effect sees Table 1.Table 2 has provided the unit running cost and the processing cost of this treatment facility.
The overall process effect of the last processing section of table 1 and formaldehyde impact the treatment effect in period
Table 2 polyoxymethylene waste water unit's running cost and processed in units cost
| Sequence number | Unit working cost and processed in units cost | Expense (unit/m 3Water) |
| ??1 | Expenditure on power | ??2.44 |
| ??2 | Medicament expense | ??0.70 |
| ??3 | Water rate | ??0.04 |
| ??4 | The wage welfare fund | ??0.28 |
| ??5 | The fixed capital basic depreciation expense | ??1.69 |
| ??6 | The extensive repair expense | ??0.48 |
| ??7 | The maintenance repair maintenance cost | ??0.20 |
| ??8 | The processed in units cost | ??5.83 |
| ??9 | Wherein: the processed in units variable cost | ??3.18 |
Claims (3)
1. method that the wastewater treatment of high density polyoxymethylene is become reuse water, comprise polyoxymethylene wastewater treatment and middle water reuse two-stage process, wherein, water recovering process is that the polyoxymethylene waste water after handling is carried out air supporting in back one section, multi-medium filtering and active carbon filtration, remove colloid wherein, suspended substance, organism and iron ion etc., separate and desalination by CMF microfiltration membrane and RO reverse osmosis membrane then, make water quality reach " urban sewage reutilization process water water quality " (GB/T19923-2005) after the standard as the recirculated cooling water reuse, it is characterized in that: the last period, the polyoxymethylene waste water treatment process comprised the steps
A, physico-chemical pretreatment
The polyoxymethylene waste water that at first with pending concentration of formaldehyde is 4000mg/L is placed on equalizing tank, adds alkali in this pond pH is transferred to 3.0～4.0, then with 30～45m
3/ h is pumped to cooling tower and is cooled to normal temperature; The cooling tower water outlet flows into the B anaerobic hydrolysis compound reactor in step automatically;
B, the anaerobic hydrolysis complex reaction
The ball-type filler that bunchiness hangs is housed in the anaerobic hydrolysis compound reactor, the low speed impeller of 30r/min is installed in the bottom, the water side is provided with the suspended layer that identical ball-type filler is formed, and input active sludge, the active sludge dosage is according to active sludge: polyoxymethylene waste water=mass ratio carried out in 1: 500, press formaldehyde special efficacy degraded bacterial classification simultaneously: the mass ratio of active sludge=1: 50 drops into formaldehyde special efficacy degraded bacterial classification, and add after sodium hydroxide transfers to 5.5～7.5 with the pH of anaerobic hydrolysis compound reactor, active sludge is cultivated domestication, the biofilm microorganisms concentration that makes apposition growth on the ball-type filler is greater than 8.0g/L, the active sludge microorganism concentration that suspends is greater than 4.0g/L, total microorganism concn stops polyoxymethylene waste water 4～12 hours after greater than 12.0g/L again, when the water side concentration of formaldehyde is lower than 400mg/L, flows into C automatically and go on foot aerobic compound reactor;
C, aerobic complex reaction
In comprising, aerobic compound reactor adorns the aerobic compound reactor of one-level and the aerobic compound reactor of secondary of efficient import micropore aeration pipe, all drop into the active sludge that measures equally with the B step and in culturing sludge domestication process, drop into formaldehyde special efficacy degraded bacterial classification, when active sludge microorganism concentration during greater than 4.0g/L, waste water is introduced in the one-level aerobic reactor, when COD concentration is lower than 800mg/L, enter and add the aerobic compound reactor of secondary that the ball-type filler identical with the B step formed suspended layer, in this reactor on the filler microorganism concn of apposition growth greater than 3.0g/L, suspension active sludge microorganism concentration is greater than 4.0g/L, total microorganism concn is greater than 7.0g/L, after hydraulic retention is controlled to be 24～36 hours, waste water flows into second pond automatically, the active sludge of second pond bottom directly is back to the B anaerobic hydrolysis compound reactor in step by reflux pump, reflux ratio is 0.5～1 times, the pH that guarantees the hydrolysis hybrid anaerobic reactor is 5.5～7.5, enter middle water recovering process when COD is lower than the water outlet of 100mg/L second pond, reach the reuse water standard;
When formaldehyde content in the high density polyoxymethylene waste water surpasses 4000mg/L or short-term when surpassing 6000mg/L; cause aerobic compound reactor bubble-related issues; go on foot aerobic compound reactor at C and add microorganism active excitation agent; dosage is controlled at 10～20mg/L; the time of adding is 8-12h every day; added continuously 3-5 days, and guaranteed the high reactivity of active sludge biological flocculence and microorganism
2. according to claim 1 a kind of with the wastewater treatment of high density polyoxymethylene to reuse technology, it is characterized in that: described microorganism excitation agent is that the model of being produced by Shanghai Zhongyao Environmental Protection Industrial Co., Ltd. is the molysite of TJYJD.
3. according to claim 1 a kind of with the wastewater treatment of high density polyoxymethylene to reuse technology, it is characterized in that: formaldehyde special efficacy degraded bacterial classification is to be produced by Shanghai Zhongyao Environmental Protection Industrial Co., Ltd., model is TJJQ, is a kind of can bearing and the amphimicrobe of degrading high concentration formaldehyde.
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| CN102021126A (en) * | 2010-05-18 | 2011-04-20 | 中国石油天然气集团公司 | Salt-resistant degrading bacterium for treating high-concentration persistent organic wastewater and application thereof |
| CN101830604B (en) * | 2010-05-13 | 2011-07-27 | 同济大学 | Method for treating high-concentration formaldehyde wastewater by using waste alkali |
| CN102285739A (en) * | 2010-06-17 | 2011-12-21 | 中国环境科学研究院 | BCMB (Buffering Circulating MediaBiological Bed) treatment method for high-concentration toxic organic waste water |
| CN102897953A (en) * | 2012-11-12 | 2013-01-30 | 中国海洋石油总公司 | Integrated deep treatment method of polyformaldehyde wastewater |
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| CN110467314A (en) * | 2019-08-14 | 2019-11-19 | 浙江巨能环境工程有限公司 | A kind of the anaerobic-aerobic high-efficient treatment device and processing method of high-concentration formaldehyde wastewater |
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| CN114315022A (en) * | 2021-12-24 | 2022-04-12 | 江苏蓝必盛化工环保股份有限公司 | Full biological treatment method for high-concentration formaldehyde wastewater |
| CN114772871A (en) * | 2022-05-27 | 2022-07-22 | 上海中耀环保实业有限公司 | Treatment method of polyformaldehyde production wastewater |
| CN117247143A (en) * | 2023-09-27 | 2023-12-19 | 江苏蓝淏环保科技有限公司 | Treatment method of polyoxymethylene wastewater |
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| CN102021126A (en) * | 2010-05-18 | 2011-04-20 | 中国石油天然气集团公司 | Salt-resistant degrading bacterium for treating high-concentration persistent organic wastewater and application thereof |
| CN102021126B (en) * | 2010-05-18 | 2012-03-14 | 中国石油天然气集团公司 | Salt-resistant degrading bacterium for treating high-concentration persistent organic wastewater and application thereof |
| CN102285739A (en) * | 2010-06-17 | 2011-12-21 | 中国环境科学研究院 | BCMB (Buffering Circulating MediaBiological Bed) treatment method for high-concentration toxic organic waste water |
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