CN103833136B - Waste water nitrosification pre-processing device and method - Google Patents
Waste water nitrosification pre-processing device and method Download PDFInfo
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Abstract
A kind of waste water nitrosification pre-processing device comprises the first sbr reactor device and the second sbr reactor device of series connection, waste water flows into described first sbr reactor device, the water outlet of described first sbr reactor device flows into described second sbr reactor device, described first sbr reactor device is used for by sequence batch (Anoxic/Aerobic reaction treatment, remove the carbon source in influent waste water and carry out denitrification to remove part nitric nitrogen, short distance nitration is carried out to generate nitrite to the part ammonia nitrogen in water inlet simultaneously, and the second sbr reactor device is used for by sequence batch (Anoxic/Aerobic reaction treatment, short distance nitration is carried out to generate nitrite to remaining ammonia nitrogen in the water outlet of described first sbr reactor device.Also disclosed herein a kind of waste water nitrosification pretreatment process adopting this equipment.This apparatus/method efficiently can remove the ammonia nitrogen in waste water, realizes water outlet nitrogen element based on nitrite, for the treatment process such as follow-up denitrification or Anammox provide high-quality to intake.
Description
Technical field
The present invention relates to wastewater processing technology, particularly a kind of waste water nitrosification pre-processing device and method.
Background technology
In sewage, nitrogen phosphorus is the important nutrient causing body eutrophication.Along with being on the rise of China and various countries' body eutrophication problem, and the lifting of following sewage drainage standard, all need strictly to control nutrition discharges such as sewerage nitrogen and phosphors.Proper N is one of necessary nutritive element of biological growth, and high concentration N element can cause body eutrophication.Ammonia nitrogen in high density, nitrite, nitrate also have negative impact to HUMAN HEALTH.China's " integrated wastewater discharge standard " specifies that nitrogen elemental standards is: total nitrogen is 15 mg/litre, and ammonia nitrogen is 5 mg/litre.All can be back in sewage disposal main process for sewage work's anaerobic digestion solution and desliming water etc., 5-10% is about to the increasing amount of sewage work's nitrogen load, so the preconditioning technique of this type of waste water has great importance to the process up to standard of guarantee sewage work's nitrogen.In addition, for high ammonia-nitrogen wastewaters such as percolates, the strengthened denitrification technology that research and development economical and efficient is stable is also the technical need that sewage treatment area is badly in need of.
Nitrogen in sewage generally exists with the form of ammonia nitrogen and organonitrogen, only contains on a small quantity or do not contain the nitrogen of nitrite and nitrate form.In traditional biological denitrification process, organonitrogen is converted into ammonia nitrogen by deamination, ammonia nitrogen is successively converted into nitrite nitrogen and nitric nitrogen by the nitrification of nitrifier, finally by the denitrification of denitrifying bacteria nitric nitrogen is converted into nitrogen and overflows from water and discharge into the atmosphere, thus reach the object removing nitrogen.If traditional technology, by nitrite approach, can save aeration rate 25%, and save denitrifying carbon source 40%, so by nitrite approach denitrification denitrogenation, there is good economic advantages and efficient feature.For high ammonia-nitrogen wastewater, developed most up-to-date techniques as anaerobic ammonia oxidation process, mainly under anaerobic, ammonia nitrogen and nitrite effect generate nitrogen to this technique.So develop Short-Cut Nitrification Process effectively, be that electron donor or anaerobic ammonia oxidation process all have important practical significance to follow-up denitrification with nitrite.
Nitrifying process comprises two steps: (1) ammonia oxidation step, ammonia nitrogen by ammonia nitrifier nitrated be nitrite; (2) nitrite denitrification step, nitrite is nitrate by nitrite oxidation by nitrobacteria.Each step of nitrifying process is realized by the biochemical action of different types of nitrifying bacteria community.In sewage treatment process, under different process structure or different operational conditions, different types of ammonia nitrifier and different types of Nitritation bacterium can be tamed out.Theoretical according to evolutionsim, each class flora, entirety can be divided into two types having r-growth strategy and have K-growth strategy.K-grows the guardian that tactful nitrifier is stable environment, when envrionment conditions changes, its adaptability and competitiveness poor, so it is mainly present in low nutrition matrix environment.When under dynamic changing condition or under there is vegetative gradient condition, nitration processes should be able to tame out the nitrifier with r-growth strategy.The nitrifier of r-growth strategy has speed of reaction soon, the feature that processing power is high.Therefore, if adopt suitable technique to tame out to have the nitrifier of r-growth strategy, then will effectively improve sewage nitrification efficiency, reduce reaction times and reactor volume etc., be sewage treatment process effectively.
Sequencing batch active sludge (SBR) is a kind of sewage treatment process being different from Traditional continuous flow activated sludge process.SBR is a kind of improved model that row's formula reactor is filled in activated sludge process establishment period.What Ardern and Lockett of Britain in 1914 adopted when initiating activated sludge process is exactly interrupter method.To the eighties, SBR technique starts to obtain a large amount of exploitation and apply.Why SBR technique comes into one's own day by day is owing to having the following advantages: technical process is simple, does not establish second pond, without sludge reflux; Reduced investment, take up an area few, working cost is low; Processing efficiency is high; Flexible operation is various; Anti impulsion load ability is strong.Meanwhile, in SBR technique, there is vegetative gradient, be conducive to the microbial population of taming out r-growth strategy.And, for the source producing high ammonia-nitrogen wastewater, be generally intermittent operation, so SBR technique is proper technique.
Summary of the invention
Main purpose of the present invention is to overcome the deficiencies in the prior art, a kind of waste water nitrosification pre-processing device and method are provided, efficiently can remove the ammonia nitrogen in waste water, realize water outlet nitrogen element based on nitrite, for the treatment process such as follow-up denitrification or Anammox provide high-quality to intake.
For achieving the above object, the present invention is by the following technical solutions:
A kind of waste water nitrosification pre-processing device, comprise the first sbr reactor device and the second sbr reactor device of series connection, waste water flows into described first sbr reactor device, the water outlet of described first sbr reactor device flows into described second sbr reactor device, described first sbr reactor device is used for by sequence batch (Anoxic/Aerobic reaction treatment, the carbon source in influent waste water is removed by denitrification, short distance nitration is carried out to generate nitrite to the part ammonia nitrogen in water inlet simultaneously, and the second sbr reactor device is used for by sequence batch (Anoxic/Aerobic reaction treatment, short distance nitration is carried out to generate nitrite to remaining ammonia nitrogen in the water outlet of described first sbr reactor device.
Further:
Comprise the return-flow system of the part effluent recycling of described second sbr reactor device to described first sbr reactor device.
Described first sbr reactor device and described second sbr reactor device adopt the reaction pattern of multi-stage anaerobic/aerobic alternate run, first step of reaction of wherein said first sbr reactor device is anoxic phases, first step of reaction of described second sbr reactor device is aerobic stage, and the final reaction stage of described first sbr reactor device and described second sbr reactor device is aerobic stage.
In this article, multi-stage anaerobic/aerobic alternately refers to that anoxic phases and/or aerobic stage occur more than twice, and the time above alternately occurs.
The reaction pattern of described first sbr reactor device is: anaerobic-aerobic-anaerobic-aerobic-anaerobic-aerobic-anaerobic-aerobic, and the reaction pattern of described second sbr reactor device is: aerobic-anaerobic-aerobic-anaerobic-aerobic-anaerobic-aerobic; Preferably, so aerobic stage the longest is 60 minutes; More preferably, the reaction times of described first sbr reactor device is: 60 minutes anoxics-60 minutes aerobic-40 minutes anoxics-60 minutes aerobic-40 minutes anoxics-60 minutes aerobic-40 minutes anoxics-60 minutes are aerobic, and the reaction times of described second sbr reactor device is: 60 minutes aerobic-60 minutes anoxics-60 minutes aerobic-60 minutes anoxics-60 minutes aerobic-60 minutes anoxics-60 minutes are aerobic.
Described first sbr reactor device and/or described second sbr reactor device are equipped with aeration pump and/or agitator separately, wherein said aeration pump is used for carrying out oxygenation at the aerobic stage of reaction in reactor, and described agitator is used for carrying out stirring to make mud be in suspended state in reactor at the anoxic phases reacted and/or aerobic stage.
The water side of described first sbr reactor device is provided with the first water outlet storage pool, so that using the water inlet of described first sbr reactor device water outlet as described second sbr reactor device; And/or described second sbr reactor device water side is provided with the second water outlet storage pool, so that by the part effluent recycling of described second sbr reactor device to described first sbr reactor device.
Described first sbr reactor device and described second sbr reactor device utilize water pump water outlet and water inlet.
From reactor, the mud of certain volume is discharged according to predetermined time condition, to control the sludge age in reactor, preferably, the preset range of described first sbr reactor device sludge age is 15 to 20 days, described second sbr reactor device not spoil disposal under predetermined stable condition, preferred, described predetermined stable condition refers to that sludge age reaches more than 3 times of default sludge age.
The cycle of operation of described first sbr reactor device and described second sbr reactor device includes into water, reaction, precipitation and bleeding stage, described sequence batch (Anoxic/Aerobic reaction treatment is carried out in described step of reaction, at described precipitate phase, the mud generation sedimentation in reactor is discharged to make supernatant liquor.
A kind of waste water nitrosification pretreatment process, can adopt any one waste water nitrosification pre-processing device aforesaid to process waste water, with make nitrogen in water mainly by short distance nitration for nitrite.
Advantageous Effects of the present invention:
The sbr reactor device that the present invention adopts two to connect, first sbr reactor device removes the carbon source in influent waste water mainly through denitrification, generating portion short distance nitration simultaneously, and the second sbr reactor device is mainly used in realizing short distance nitration, for sewage work's anaerobic digestion solution and desliming water and percolate etc., there is low-carbon-source height ammonia nitrogen class waste water, this two-stage sbr reactor device is adapted to the Intermittent Features that waste water produces effectively, utilize SBR sequence batch (Anoxic/Aerobic reaction treatment, be conducive to taming out the microbial population with r-growth strategy, ammonia nitrogen can be removed efficiently to low-carbon-source high ammonia-nitrogen wastewater, to realize in water outlet nitrogen element based on nitrite, thus provide high-quality to intake for treatment process such as subsequent additional carbon source denitrification or Anammoxs.Particularly, for the two-stage SBR sequence batch (reaction process of sewage disposal, define dynamic changing condition or vegetative gradient condition, nitration processes used can tame out the nitrifier with r-growth strategy, is conducive to short distance nitration and obtains nitrite.
In preferred scheme, in reaction operational mode, adopt the aerobic alternate mode of multi-stage anaerobic, the growth of ammonium oxidation bacterium can be promoted and suppress the growth of NOB, so nitrite accumulation can be realized efficiently further.
Accompanying drawing explanation
Fig. 1 is waste water nitrosification pre-processing device and the process schematic representation of an embodiment of the present invention.
Number in the figure illustrates: 1-first pump sump; 2-first intake pump; 3-first aeration pump; 4-first agitator; 5-first sbr reactor device; 6-first goes out water pump; 7-first water outlet tank; 8-second intake pump; 9-second aeration pump; 10-second agitator; 11-second sbr reactor device; 12-second goes out water pump; 13-second water outlet tank; 14-effluent recycling pump.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated.It is emphasized that following explanation is only exemplary, instead of in order to limit the scope of the invention and apply.
As shown in Figure 1, waste water nitrosification pre-processing device comprises two sbr reactor devices.First sbr reactor device 5 is nitrated for being removed carbon source by denitrification and carrying out part, and wherein denitrification is the carbon source in order to remove better in water inlet, and the flora of taming, mainly based on denitrifying bacteria, has part nitrifier simultaneously.Preferably, the first sbr reactor device 5 adopts the aerobic pattern of multi-stage anaerobic, can remove carbon source further and realize part nitrated at aerobic stage.Second sbr reactor device 11 mainly carries out short distance nitration (nitrated one-tenth nitrite).After carbon source is effectively removed in the first sbr reactor device 5, water outlet only contains ammonia nitrogen and part nitric nitrogen, so Ammonia Nitrification is mainly become nitrite by the second sbr reactor device 11.
Adopt the advantage of two sbr reactor devices as follows:
1, because general containing a small amount of organic carbon source in former water, adopt two sbr reactor devices of connecting, can effectively utilize and remove carbon source, avoid utilization of carbon source heterotrophic bacterium on the impact of nitrifier, favourable short distance nitration simultaneously.
2, adopt two sbr reactor devices simultaneously, be conducive to the separation realizing microorganism dominant population, be conducive to the maximum speed of reaction and the efficiency that realize respective flora.In the present invention, two reactors all adopt sequencing batch reactor to carry out pre-treatment, preferably, all adopt multi-stage anaerobic/aerobic operational mode, realize water outlet based on nitrite, think that the process such as subsequent additional carbon source denitrification or Anammox provide high-quality to intake.
In a preferred embodiment, waste water nitrosification pre-processing device comprises the return-flow system of the part effluent recycling of the second sbr reactor device 11 to the first sbr reactor device 5.
The process of low-carbon (LC) high-ammonia-nitrogen sewage mainly comprises the removal of carbon source and nitrogen.Wherein the removal of nitrogen mainly comprises nitration processes (nitrosification pretreatment technology of the present invention i.e. this nitration processes corresponding) and denitrification process.Nitration processes is nitrite nitrogen (nitrosification) and nitrate nitrogen mineralized nitrogen, is wherein converted into oxygenation required for nitrite nitrogen than being converted into nitrate nitrogen few 25%, therefore can saves energy consumption.On the other hand, the carbon source in sewage can be removed by denitrification.In sewage, the microorganism (heterotrophic bacterium) of removing carbon source is compared with the microorganism (nitrifier) of nitrated ammonia nitrogen to nitric nitrogen, heterotrophic bacterium looks fast than nitrifier, so can nitrifier be suppressed when growing together, if and nitrobacteria growth is incomplete, nitric nitrogen produces less, is not only not enough to remove carbon source by denitrification, but also because carbon source heterotrophic bacterium limits the nitrated of whole process to the suppression of nitrifier, and finally can affect denitrogenation.Adopt two sbr reactor devices, inside the first sbr reactor device 5, promote the growth of heterotrophic bacterium, utilize the carbon source in denitrification removal sewage, meanwhile, also have the nitrobacteria growth of small amount; In the second sbr reactor device 11, because handled water eliminates organic carbon source, being based on ammonia nitrogen, therefore can promoting the growth of nitrifier, is the nitric nitrogen based on nitrite mineralized nitrogen.In addition, to reflux a part of sewage from the second sbr reactor device 11, owing to comprising the nitric nitrogen required for denitrification in recirculation water, be conducive to better denitrification to remove the carbon source in sewage.Therefore, adopt two sbr reactor devices that nitrifier in the second sbr reactor device can be avoided to be subject to the suppression of heterotrophic bacterium, thus nitrobacteria growth speed is maximized, be conducive to nitrosification.
It is as follows that waste water nitrosification pre-processing device mainly runs treating processes.Required sewage to be processed and first processing the first sbr reactor device 5 from the sewage of the second sbr reactor device 11 partial reflux, is effectively utilized and removes carbon source and part nitric nitrogen in sewage, also can realize part nitrated at aerobic stage by denitrification; The water outlet pump of the first sbr reactor device 5 pumps into the second sbr reactor device 11, carries out further short distance nitration process, is mainly nitrite to make the water outlet of the second sbr reactor device 11.
Preferably, there is the first water outlet storage pool the first sbr reactor device 5 water side, so that using the water inlet of the first sbr reactor device 5 water outlet as the second sbr reactor device 11; Also there is the second water outlet storage pool second sbr reactor device 11 water side, so that by the part effluent recycling of the second sbr reactor device 11 to the first sbr reactor device 5.
The cycle of operation of the first sbr reactor device 5 comprises into water, reaction, precipitation and bleeding stage.In fill phase, required low-carbon (LC) high ammonia-nitrogen wastewater to be processed adds in the first sbr reactor device 5 by the first intake pump 2, and the part water outlet that the second sbr reactor device 11 processes simultaneously is back to the first sbr reactor device 5 by effluent recycling pump 14.In step of reaction, adopt sequence batch (and multi-stage anaerobic/aerobic alternate mode, in effective utilization water inlet, carbon source carries out denitrification, and aerobic stage replaces anoxic phases so can realize part short distance nitration because combine simultaneously.Preferably, anoxic phases adopts mechanical stirrer to carry out stirring to make mud be in suspended state, adopts aerator to carry out oxygenation at aerobic stage simultaneously.At precipitate phase, associated component is out of service, makes mud generation sedimentation.At bleeding stage, go out water pump 6 by first and discharge the process water of preset vol in the first water outlet tank 7.Preferably, according to designed sludge age, to schedule (as at time point every day) or before step of reaction terminates or discharge the mud of certain volume in sludge settling complete stage, control reactor sludge age in preset range, general control is between 15 to 20 days.
The cycle of operation of the second sbr reactor device 11 also comprises into water, reaction, precipitation and bleeding stage.In fill phase, required waste water to be processed adopts the second intake pump 8 to add the second sbr reactor device 11 from the first water outlet tank 7.In step of reaction, adopt sequence batch (and multi-stage anaerobic/aerobic pattern, nitrated to nitrous acid hydrochlorate of nitrifier can be suppressed, effectively realize short distance nitration.Preferably, anoxic phases adopts mechanical stirrer to carry out stirring to make mud be in suspended state, adopts aerator to carry out oxygenation at aerobic stage simultaneously.At precipitate phase, assembly is out of service, makes mud generation sedimentation.At bleeding stage, go out water pump 12 by second and discharge the process water of preset vol in the second water outlet tank 13.Preferably, to schedule (as at time point every day) or before step of reaction terminates or discharge the mud of certain volume in sludge settling complete stage, the sludge age in reactor is controlled.Default sludge age is 15 to 20 days, the sludge age of the second sbr reactor device 11 reach more than 3 times of default sludge age stable after, due to now mainly will containing nitrifier in this reactor, so far can no longer spoil disposal, to maintain the nitrifier biomass of higher concentration.
In a specific embodiment, the cycle of operation (time period from inlet water to outlet water) of two sbr reactor devices is 8 hours.In each cycle, the first sbr reactor device 5 water inlet is 1/3 reactor volume, simultaneously from the second sbr reactor device 11 effluent recycling volume be 1/6 reactor volume; In each cycle, it is 1/2 reactor volume that the second sbr reactor device 11 processes the water yield.In 8 hours reaction process, anoxic/aerobic alternate mode that the first sbr reactor device 5 adopts is: 60 minutes anoxics+60 minutes aerobic+40 minutes anoxics+60 minutes aerobic+40 minutes anoxics+60 minutes aerobic+40 minutes anoxics+60 minutes are aerobic.Because the first sbr reactor device 5 is mainly in order to carry out denitrification and effectively utilize the carbon source in water inlet, alternate mode adopt start as anoxia condition, be next multi-stage aerobic and anoxic alternate run, effectively can utilize the carbon source in water inlet, be conducive to promoting denitrification process, can short distance nitration be realized again simultaneously.The nitrite nitrifier suppressed due to alternate mode generally after 60 minutes can activity recovery, so aerobic stage is maximum be set to 60 minutes.Anoxic/aerobic alternate mode that second sbr reactor device 11 adopts is: 60 minutes aerobic+60 minutes anoxics+60 minutes aerobic+60 minutes anoxics+60 minutes aerobic+60 minutes anoxics+60 minutes are aerobic.Because the second sbr reactor device 11 water inlet does not have carbon source, the oxygen nitration reaction so beginning advanced person acts charitably, alternate mode below can effectively suppress the growth of nitrite nitrifier and realize short distance nitration.
In preferred embodiment, the first sbr reactor device 5 sludge age adopts 15 days, the second sbr reactor device 11 not spoil disposal under stable condition.
Experimental study results which prove, the present invention can efficiently process low-carbon (LC) high ammonia-nitrogen wastewater.To the low-carbon (LC) high ammonia-nitrogen wastewater of water-inlet carbon source concentration C OD to be 800mg/L and ammonia nitrogen concentration be about 800mg/L, first sbr reactor device 5 and the second sbr reactor device 11 all adopt 8 hour cycle of operation, water outlet COD is less than 30mg/L, ammonia nitrogen concentration is less than 10mg/L, nitrite nitrogen concentration is at about 450mg/L, and nitrate nitrogen concentration is less than 80mg/L, effectively achieve nitrosation process, high nitrite content water inlet effectively can be provided for follow-up denitrification or Anammox process.The hydraulic detention time of two reactors is 48 hours; Total ammonia nitrogen elimination capacity is 400mg/Ld, much larger than the elimination capacity (generally at 100-200mg/Ld) that most of high ammonia-nitrogen wastewater process adopts.
In actual use, because the second sbr reactor device 11 water outlet is mainly containing nitrite, according to influent load, water outlet ammonia-nitrogen content can be different, and when adopting subsequent additional carbon source denitrification denitrogenation, load can meet removes ammonia nitrogen value completely; When follow-up employing anaerobic ammonia oxidation process, can according to the second sbr reactor device 11 water outlet ammonia nitrogen and nitrite ratio, or carry out suitable mixing with the first sbr reactor device 5 water outlet (main containing ammonia nitrogen and a small amount of nitrite), reach ammonia nitrogen needed for Anammox and nitrous acid proper ratio.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. a waste water nitrosification pre-processing device, it is characterized in that, comprise the first sbr reactor device and the second sbr reactor device of series connection, waste water flows into described first sbr reactor device, the water outlet of described first sbr reactor device flows into described second sbr reactor device, described first sbr reactor device is used for by sequence batch (Anoxic/Aerobic reaction treatment, the carbon source in water inlet is utilized to promote denitrification, short distance nitration is carried out to generate nitrite to the part ammonia nitrogen in water inlet simultaneously, and the second sbr reactor device is used for by sequence batch (Anoxic/Aerobic reaction treatment, short distance nitration is carried out to generate nitrite to remaining ammonia nitrogen in the water outlet of described first sbr reactor device, wherein said first sbr reactor device and described second sbr reactor device adopt the reaction pattern of multi-stage anaerobic/aerobic alternate run, first step of reaction of wherein said first sbr reactor device is anoxic phases, first step of reaction of described second sbr reactor device is aerobic stage, the final reaction stage of described first sbr reactor device and described second sbr reactor device is aerobic stage.
2. waste water nitrosification pre-processing device as claimed in claim 1, is characterized in that, also comprise the return-flow system of the part effluent recycling of described second sbr reactor device to described first sbr reactor device.
3. waste water nitrosification pre-processing device as claimed in claim 1, it is characterized in that, the reaction pattern of described first sbr reactor device is: anaerobic-aerobic-anaerobic-aerobic-anaerobic-aerobic-anaerobic-aerobic, and the reaction pattern of described second sbr reactor device is: aerobic-anaerobic-aerobic-anaerobic-aerobic-anaerobic-aerobic; Preferably, so aerobic stage the longest is 60 minutes; More preferably, the reaction times of described first sbr reactor device is: 60 minutes anoxics-60 minutes aerobic-40 minutes anoxics-60 minutes aerobic-40 minutes anoxics-60 minutes aerobic-40 minutes anoxics-60 minutes are aerobic, and the reaction times of described second sbr reactor device is: 60 minutes aerobic-60 minutes anoxics-60 minutes aerobic-60 minutes anoxics-60 minutes aerobic-60 minutes anoxics-60 minutes are aerobic.
4. the waste water nitrosification pre-processing device as described in any one of claims 1 to 3, it is characterized in that, described first sbr reactor device and/or described second sbr reactor device are equipped with aeration pump and/or agitator separately, wherein said aeration pump is used for carrying out oxygenation at the aerobic stage of reaction in reactor, and described agitator is used for carrying out stirring to make mud be in suspended state in reactor at the anoxic phases reacted and/or aerobic stage.
5. the waste water nitrosification pre-processing device as described in any one of claims 1 to 3, it is characterized in that, the water side of described first sbr reactor device is provided with the first water outlet storage pool, so that using the water inlet of described first sbr reactor device water outlet as described second sbr reactor device; And/or described second sbr reactor device water side is provided with the second water outlet storage pool, so that by the part effluent recycling of described second sbr reactor device to described first sbr reactor device.
6. the waste water nitrosification pre-processing device as described in any one of claims 1 to 3, is characterized in that, described first sbr reactor device and described second sbr reactor device utilize water pump water outlet and water inlet.
7. the waste water nitrosification pre-processing device as described in any one of claims 1 to 3, it is characterized in that, from reactor, the mud of certain volume is discharged according to predetermined time condition, to control the sludge age in reactor, preferably, the preset range of described first sbr reactor device sludge age is 15 to 20 days, described second sbr reactor device not spoil disposal under predetermined stable condition, preferred, described predetermined stable condition refers to that sludge age reaches more than 3 times of default sludge age.
8. the waste water nitrosification pre-processing device as described in any one of claims 1 to 3, it is characterized in that, the cycle of operation of described first sbr reactor device and described second sbr reactor device includes into water, reaction, precipitation and bleeding stage, described sequence batch (Anoxic/Aerobic reaction treatment is carried out in described step of reaction, at described precipitate phase, the mud generation sedimentation in reactor is discharged to make supernatant liquor.
9. a waste water nitrosification pretreatment process, is characterized in that, comprises and adopts the waste water nitrosification pre-processing device described in any one of claim 1 to 8 to process to make the nitrogen in water to be mainly nitrite by short distance nitration to waste water.
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| CN107721090A (en) * | 2017-11-23 | 2018-02-23 | 清华大学深圳研究生院 | A kind of azo treatment method of printing and dying wastewater and equipment |
| CN108911143A (en) * | 2018-09-03 | 2018-11-30 | 上海世渊环保科技有限公司 | A kind of stainless steel acid cleaning waste water denitrogenation processing system and method |
| CN109678297B (en) * | 2019-01-16 | 2021-09-14 | 何江涛 | Sequencing batch sectional type biomembrane process sewage treatment system and sewage treatment method |
| CN115385443B (en) * | 2022-07-18 | 2024-01-30 | 赣州生态环境工程投资有限责任公司 | Method and device for quickly starting and stably operating short-cut nitrification of low-temperature low-ammonia-nitrogen wastewater |
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