CN105366807A - Waste water denitration processing system used for oxidation denitration - Google Patents
Waste water denitration processing system used for oxidation denitration Download PDFInfo
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- CN105366807A CN105366807A CN201510898882.2A CN201510898882A CN105366807A CN 105366807 A CN105366807 A CN 105366807A CN 201510898882 A CN201510898882 A CN 201510898882A CN 105366807 A CN105366807 A CN 105366807A
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- denitration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2853—Anaerobic digestion processes using anaerobic membrane bioreactors
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a processing system, and more specifically relates to a waste water denitration processing system used for oxidation denitration. The waste water denitration processing system comprises a membrane bioreactor, a degasser, and a filtrate tank; the membrane bioreactor is provided with a waste water inlet, a carbon source injection port, a trace element injection port, an alkali liquor injection port, and an excess sludge outlet; a stirrer, a pH probe, and a membrane filtration component arranged in the membrane bioreactor; the excess sludge outlet is arranged behind the membrane filtration component; the membrane filtration component is connected with the degasser via a pipeline; the pipeline arranged between the membrane filtration component and the degasser is provided with a control valve; the upper part of the degasser is provided with a gas exhaust valve; the degasser is connected with the filtrate tank via a pipeline; and the pipeline between the degasser and the filtrate tank is provided with a filtrate pump. In flue gas treatment process via oxidation denitration using the waste water denitration processing system, generated waste water can be treated via biological denitrification; and comparing with evaporative crystallization, energy consumption and treatment cost are both reduced greatly.
Description
Technical field
The present invention relates to a kind for the treatment of system, be specifically related to a kind of waste water denitration treatment system for oxidation style denitration.
Background technology
SO2 and NOx is two kinds of main gaseousness atmospheric polluting materials, and they are primarily of burning or the generation of other chemical process and with fume emission in air.At present, the denitration of flue gas mainly adopts reduction method and oxidation style two class, reduction method uses ammonia or urea as reductive agent, uses V5O2 as catalyzer under the temperature condition of 300-400C, or does not use catalyzer, under the temperature condition of 1000C, the NOx in flue gas is optionally reduced into nitrogen.Selective catalytic reduction is owing to needing to use the catalyzer containing transition metal, and catalyzer can be subject to the wearing and tearing of dust in flue gas and need frequent replacing, and have the problem such as NH_3 leakage and temperature condition harshness, its use is subject to certain restrictions simultaneously.Selective non-catalytic reduction rule denitration effect cannot meet strict NOx emission standard, and thus its use is also restricted.And oxidation rule uses the oxygenant such as ozone and H2O2 that the NO(in NOx is accounted for more than 90% of NOx in flue gas) NO2 or N2O5(NO2 that be oxidized to easier wash-out account for more than 90%), and remove in wet scrubber tower together with the SO2 in flue gas.Oxidation style denitration due to technique simple, without the need to using catalyzer, Applicable temperature scope is wide, therefore in use cost and suitability, has some superiority.But oxidation style denitration can produce a certain amount of nitre waste water that contains needs process.Because desulfurization and denitration are often carried out simultaneously, the waste water that these desulfuring and denitrifying apparatus are arranged, simultaneously containing desulfurization and denitration product, and it is dense, often contain the saltiness of about 5%, the calcium sulfite formed when adopting lime or Wingdale to make absorption agent and calcium sulfate are all the compounds of indissoluble and water, can be removed as suspended solids by coagulating sedimentation.And use NaOH as the S-WAT produced during absorption agent and sodium bisulfite and sodium sulfate all soluble in water, industrially generally adopt aeration S-WAT and sodium bisulfite to be oxidized to sodium sulfate, then the method removing of evaporative crystallization.The nitrite that oxidation style denitration is formed and nitrate, separately exist in waste water, or and the sulfur-bearing salinity such as sodium sulfate mix, due to the characteristic that they are soluble in water, the general removal effect of coagulant sedimentation is limited, and evaporative crystallization method generally need be used to reach the object of desalination.Method process one ton of water of evaporative crystallization needs to consume 60-70 degree electricity.Power consumption high like this and the high cost brought thus, limit the use of evaporative crystallization method to a great extent.The Na2SO4 that sulfocompound in waste water changes into after abundant aerating oxidation process, very stable in the environment, generally not as pollutent, can directly discharge.Nitrate in the waste water that denitration brings, due to waste water total nitrogen can be caused to exceed standard, could directly discharge after must removing.Biological denitrification utilizes microorganism Denitrification Characteristics under anoxic conditions (also becoming anaerobic respiration mechanism) that NO2 and NO3 is changed into harmless nitrogen, NO2 and NO3 obtains as electron acceptor(EA) to utilize, and denitrifying microorganism needs to obtain a certain amount of carbon source with trace element as source of nutrition in denitrification process.Biological denitrification is applied in the process of municipal effluent.But, at the biological denitrification device that field of waste water treatment uses, generally all form a whole with biological nitration device, this is because nitrogenous substances mainly ammonia contained in common municipal wastewater, first ammonia become nitrous acid and nitric acid by the nitrification of microorganism, then just changes into nitrogen by denitrification.The concentration of the general ammonia nitrogen of this system is very low, only has a hundreds of ppm.Simultaneously general containing the carbon source required for biological denitrification in municipal wastewater, do not need to add carbon source in addition.And, nitrifier and denitrifying bacteria, together with the heterotrophic bacterium symbiosis of other wastewater treatment, can form stable zoogloea flocculation structure, and these microorganisms can be separated in follow-up settling tank, and partial reflux is in biological treatment system, to guarantee in Waste Water Treatment.But such system is just not suitable for for the process of the nitrogenous effluent that the denitrating system of flue gas produces.Reason following points: 1. denitrating flue gas nitrogenous effluent is not containing ammonia nitrogen, only has NO3-N and NO2-N; 2. do not have carbon source and other trace elements to utilize in waste water, carbon source and trace element must be added; 3. the salt containing high density in denitrating flue gas nitrogenous effluent, the concentration of salt can reach 5-10%; 4. the concentration of nitrate radical contained by is also than the high tens times of even hundreds of times in municipal wastewater.As described above, flue gas oxidation style denitration technology, can produce a certain amount of high density needs process containing nitre waste water, and adopts the method for evaporative crystallization, and power consumption is very high, and running cost is large.And existing biological denitrification system nitrification and denitrification conbined usage, applicable nitrogen load is low, can not use smoke processing system.Therefore, be badly in need of a kind ofly carrying out processing and economic and practical device containing nitre waste water for what produce after oxidation style denitration specially.
Summary of the invention
The present invention is mainly oxidation style flue gas denitrification system and provides a kind of effective biological denitrification denitrogenation processing system, this system utilizes the denitrification of microorganism, nitrogenous compound in waste water is reduced into N2, thus remove from waste water, for a waste water denitration treatment system for oxidation style denitration, it is characterized in that: comprise membrane bioreactor, de-gassing vessel and reservoir; Described membrane bioreactor is provided with the outlet of waterwater entrance, carbon source inlet, micro-inlet, alkali lye inlet and excess sludge discharge; Agitator, PH probe and membrane filtration module is provided with in described membrane bioreactor, described excess sludge discharge outlet is arranged on the rear of described membrane filtration module, described membrane filtration module is connected by pipeline with de-gassing vessel, pipeline between membrane filtration module and de-gassing vessel is provided with by-pass valve control, the top of described de-gassing vessel is provided with drain tap, described de-gassing vessel is connected by pipeline with reservoir, and between de-gassing vessel and reservoir, pipeline is provided with filtrate pump.
Further, described membrane bioreactor is also provided with the flushing pump for washing away membrane filtration module.
Further, the pipeline between described excess sludge discharge outlet and membrane bioreactor is provided with excess sludge discharge pump.
Further, described membrane filtration module is plate film assembly or hollow fiber film assembly.
Further, described plate film assembly is with one of parallel placement group of flat sheet membrane for underlying membrane assembly unit, and each unit is made up of the liner of a set of fixing parallel membrane together with they are clamping and fixture and integrated filtrate outlet.
Further, described hollow fiber film assembly is with a branch of hollow-fibre membrane for elementary cell, and each unit is made up of the fixture of a set of fixing hollow-fibre membrane and dividing plate mixed solution and filtered liquid separated and filtrate liquid collecting zone.
An application for above-mentioned treatment system, is characterized in that: NO2 and the NO3 concentration scope of application in described waste water is the molar ratio of 1-20g/L, NO2 and NO3 is between 0-2, salt concn lower than 30g/L, pH at 7-9.
Further, described waste water determining in membrane bioreactor stays the time to be 7-9 hour.
Beneficial effect of the present invention is: adopt the present invention, and the waste water produced when using oxidation style denitration to carry out fume treatment can process by biological denitrification method, and compare and adopt evaporative crystallization method, energy consumption and processing cost significantly reduce.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Wherein, 1 waterwater entrance, 2 membrane bioreactors, 3 agitators, 4 membrane filtration modules, 5 de-gassing vessels, 6 filtrate pumps, 7 reservoir, 8 cleaner liquid outlets, 9 excess sludge discharge pumps, 10 excess sludge discharge outlets, 11 flushing pumps, 12 carbon source inlets, 13 micro-inlets, 14 alkali lye inlets, 15 by-pass valve controls, 16 drain taps.
Embodiment
Be further described the present invention below in conjunction with accompanying drawing: the first embodiment, a kind of waste water denitration treatment system for oxidation style denitration, comprises membrane bioreactor 2, de-gassing vessel 5 and reservoir 7, described membrane bioreactor 2 is provided with waterwater entrance 1, carbon source inlet 12, micro-inlet 13, alkali lye inlet 14 and excess sludge discharge outlet 10, agitator 3 is provided with in described membrane bioreactor 2, PH probe and membrane filtration module 4, also be provided with the flushing pump 11 for washing away membrane filtration module, described excess sludge discharge outlet 10 is arranged on the rear of described membrane filtration module 4, described membrane filtration module 4 is connected by pipeline with de-gassing vessel 5, pipeline between membrane filtration module 4 and de-gassing vessel 5 is provided with by-pass valve control 15, the top of described de-gassing vessel 5 is provided with drain tap 16, described de-gassing vessel 5 is connected by pipeline with reservoir 7, between de-gassing vessel 5 and reservoir 7, pipeline is provided with filtrate pump 6, pipeline between described excess sludge discharge outlet 10 and membrane bioreactor 2 is provided with excess sludge discharge pump 9, described membrane filtration module is plate film assembly, described plate film assembly with one of parallel placement group of flat sheet membrane for underlying membrane assembly unit, each unit is made up of the liner of a set of fixing parallel membrane together with they are clamping and fixture and integrated filtrate outlet.
In reality, the waste water of native system process has requirement, NO2 and the NO3 concentration scope of application in waste water is 1-20g/L, the molar ratio of NO2 and NO3 is between 0-2, salt concn is lower than 30g/L, pH is at 7-9, and when concrete process waste water, waste water determining in membrane bioreactor stays the time to be 7-9 hour.
Second embodiment, be with the first embodiment difference, described membrane filtration module is hollow fiber film assembly, hollow fiber film assembly is with a branch of hollow-fibre membrane for elementary cell, and each unit is made up of the fixture of a set of fixing hollow-fibre membrane and dividing plate mixed solution and filtered liquid separated and filtrate liquid collecting zone.In prior art, oxidation style flue-gas denitration process uses oxygenant to be NO by usual for the NOx(in waste gas 90% or more) be oxidized to the NOx(mainly NO2 of more high-valence state), and in follow-up desulfurization washing tower, the NOx of high-valence state is washed in liquid washings and make them remove from gas phase.In washings, just there is nitrite and the nitrate of high density like this, thus from washings the waste discharge shunted away also containing these nitrogenous compounds.Because the total nitrogen of waste discharge controls, the waste water containing these nitrogenous compounds must process before discharging.The present invention utilizes the denitrification principle of microorganism, denitrification membrane Bio-reactor Technology is adopted to process this waste water, to make in waste water contained NO3-N and NO2-N be reduced into N2 under the effect of microorganism, thus make in waste water containing nitrated compound by innoxious and remove.Membrane bioreactor of the present invention refers to places membrane filtration system in biological reaction apparatus, make water and micromolecular compound can leave reactor through film, and microorganism and other suspended solids can be retained in reactor.Due to membrane bioreactor need not be follow-up precipitate and separate, like this, the microorganism concn in reaction tank can be made far away higher than general biological reaction apparatus, and, its load also can exceed a lot than the reaction tank of routine, and reaction efficiency is far above common response device.NO2 and the NO3 concentration scope of application in the waste water that the present invention applies is: 1-20g/L.The wherein any value of the molar ratio of NO2 and NO3 between 0-2, total salt concn contained in waste water is lower than 30g/L, pH at 7-9, and the sludge concentration in reaction tank is 20-38(g/L).Carbon source required for reaction can by commercially available sodium acetate, the low molecule organic matter such as ethanol or methyl alcohol, or introduces one organic waste water, or any waste liquid containing VFA composition or waste material serve as.Trace element also can be served as by the waste liquid of Sewage Plant.In wastewater membrane bio-reactor and enter mouth and trace element from carbon source and enter the carbon source and trace element mixing that mouth enters, the energy providing the denitrifying bacteria in bio-reactor enough and nutritive ingredient, waste water waterpower in the reactor stays the time to be 8 hours surely, nitrate contained in waste water and nitrite, as the electron donor of denitrifying bacteria energy metabolism, are finally converted to harmless nitrogen.Denitrifying bacteria utilizes part carbon source to be grown as nutrition.Waste water after process enters membrane filtration module and filters, filtrate then through de-gassing vessel by filtrate pump suction filtering liquid pool, and enter plant area's drainage pipeline through relief outlet.The microbial cells increased in biofilm reactor must be drained by excess sludge discharge pump as excess sludge, enters dewatering unit and carries out processed.In order to make the surface of membrane filtration module obtain enough flushings, and keeping the clean of film surface, using the film surface of flushing pump to membrane module to carry out sluicing.In the present invention, mixed solution refers to waste water that original state enters and enters mouth and trace element from carbon source and enters carbon source and trace element mixing that mouth enters and regulate the mixture of alkali lye of PH, and filtered liquid refers to the liquid after being filtered by membrane filtration module.
Claims (8)
1., for a waste water denitration treatment system for oxidation style denitration, it is characterized in that: comprise membrane bioreactor, de-gassing vessel and reservoir; Described membrane bioreactor is provided with the outlet of waterwater entrance, carbon source inlet, micro-inlet, alkali lye inlet and excess sludge discharge; Agitator, PH probe and membrane filtration module is provided with in described membrane bioreactor, described excess sludge discharge outlet is arranged on the rear of described membrane filtration module, described membrane filtration module is connected by pipeline with de-gassing vessel, pipeline between membrane filtration module and de-gassing vessel is provided with by-pass valve control, the top of described de-gassing vessel is provided with drain tap, described de-gassing vessel is connected by pipeline with reservoir, and between de-gassing vessel and reservoir, pipeline is provided with filtrate pump.
2. treatment system according to claim 1, is characterized in that: described membrane bioreactor is also provided with the flushing pump for washing away membrane filtration module.
3. treatment system according to claim 1, is characterized in that: the pipeline between described excess sludge discharge outlet and membrane bioreactor is provided with excess sludge discharge pump.
4. treatment system according to claim 1, is characterized in that: described membrane filtration module is plate film assembly or hollow fiber film assembly.
5. treatment system according to claim 4, it is characterized in that: described plate film assembly is with one of parallel placement group of flat sheet membrane for underlying membrane assembly unit, and each unit is made up of the liner of a set of fixing parallel membrane together with they are clamping and fixture and integrated filtrate outlet.
6. treatment system according to claim 4, it is characterized in that: described hollow fiber film assembly is with a branch of hollow-fibre membrane for elementary cell, and each unit is made up of the fixture of a set of fixing hollow-fibre membrane and dividing plate mixed solution and filtered liquid separated and filtrate liquid collecting zone.
7. the application of the treatment system according to any one of claim 1-6, is characterized in that: NO2 and the NO3 concentration scope of application in waste water is the molar ratio of 1-20g/L, NO2 and NO3 is between 0-2, salt concn lower than 30g/L, pH at 7-9.
8. the application for the treatment of system according to claim 7, is characterized in that: described waste water determining in membrane bioreactor stays the time to be 7-9 hour.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510898882.2A CN105366807A (en) | 2015-12-09 | 2015-12-09 | Waste water denitration processing system used for oxidation denitration |
| PCT/CN2016/070848 WO2017096693A1 (en) | 2015-12-09 | 2016-01-14 | Waste water denitrification treatment system for use in oxidation-based denitrification |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510898882.2A CN105366807A (en) | 2015-12-09 | 2015-12-09 | Waste water denitration processing system used for oxidation denitration |
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| CN105366807A true CN105366807A (en) | 2016-03-02 |
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| CN201510898882.2A Pending CN105366807A (en) | 2015-12-09 | 2015-12-09 | Waste water denitration processing system used for oxidation denitration |
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| WO (1) | WO2017096693A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115938A (en) * | 2020-01-20 | 2020-05-08 | 江苏德义通环保科技有限公司 | Activated carbon regeneration gas washing acidic wastewater treatment device and method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108164001A (en) * | 2017-12-29 | 2018-06-15 | 广州日日红水环境处理有限公司 | A kind of denitrogenation-type biological flocculation seed training breeding method |
| CN113943088A (en) * | 2021-11-19 | 2022-01-18 | 浙江天地环保科技股份有限公司 | SCR denitration catalyst regeneration wastewater zero-discharge treatment system and method |
| CN118253156A (en) * | 2024-05-29 | 2024-06-28 | 阜新市飞翔皮革制品有限公司 | Waste gas treatment equipment for leather processing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100948197B1 (en) * | 2009-09-07 | 2010-03-16 | 주식회사 대진환경산업 | Advanced treating apparatus for removing nitrogen and phosphorus using intermitted aeration, membrane, electrolysis apparatus, advanced method of water treatment using the same |
| CN103723893A (en) * | 2014-01-10 | 2014-04-16 | 中国科学院生态环境研究中心 | Method for removing nitrate nitrogen from water |
| CN205367869U (en) * | 2015-12-09 | 2016-07-06 | 深圳广昌达环境科学有限公司 | A waste water denitration treatment system for oxidizing process denitration |
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2015
- 2015-12-09 CN CN201510898882.2A patent/CN105366807A/en active Pending
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2016
- 2016-01-14 WO PCT/CN2016/070848 patent/WO2017096693A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100948197B1 (en) * | 2009-09-07 | 2010-03-16 | 주식회사 대진환경산업 | Advanced treating apparatus for removing nitrogen and phosphorus using intermitted aeration, membrane, electrolysis apparatus, advanced method of water treatment using the same |
| CN103723893A (en) * | 2014-01-10 | 2014-04-16 | 中国科学院生态环境研究中心 | Method for removing nitrate nitrogen from water |
| CN205367869U (en) * | 2015-12-09 | 2016-07-06 | 深圳广昌达环境科学有限公司 | A waste water denitration treatment system for oxidizing process denitration |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115938A (en) * | 2020-01-20 | 2020-05-08 | 江苏德义通环保科技有限公司 | Activated carbon regeneration gas washing acidic wastewater treatment device and method |
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| WO2017096693A1 (en) | 2017-06-15 |
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