CN103663696A - Membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal - Google Patents
Membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal Download PDFInfo
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Abstract
The invention discloses a membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal. An integrated reactor is formed by an A<2>/O process, a biological membrane process and the MBR. The MBR comprises an anaerobic tank, an anoxic tank, an aerobic tank, a feeding system, an aerating system, a drainage system and automatic control equipment, wherein semi-soft biological membrane fillers are put in the anaerobic tank, the anoxic tank and the aerobic tank; a membrane component is put in the aerobic tank, and a membrane separation region is not independently arranged. The reactor has the advantages that anaerobic phosphorus release and phosphorus accumulation in the aerobic tank are carried out via the sludge on the biological fillers in the anaerobic tank, thus increasing the total removal rate of phosphorus in the sewage; organic matters undergo hydrolytic acidification and organic nitrogen is aminated after the preserved szechuan pickle wastewater passes through the anaerobic tank; nitrification liquor in the aerobic tank flows back to the anoxic tank to form denitrification in the anoxic tank. The MBR has a simple structure and high pollutant treatment efficiency, is light in membrane pollution, and can simultaneously treat the pollutants such as organic matters, total nitrogen, total phosphorus, SS and the like of high salinity wastewater.
Description
Technical field
The invention belongs to sewage disposal, environmental protection technical field, be specifically related to a kind of membrane bioreactor of processing the enhanced biological phosphorus removal denitrogenation of the high nitrogen phosphorus of high salt preserved szechuan pickle waste water.
Background technology
Fast development along with reservoir area of Three Gorges economy, the industrial scale of its mainstay industry hot pickled mustard tube is increasing, in its production process, to discharge to reservoir area of Three Gorges every year the high nitrogen phosphorus of the undressed high salt organic wastewater of approximately 500 ten thousand steres, the pollutent organism (take COD) that enters every year reservoir, as 130,000 tons, 2,225 ten thousand tons, 800,000 tons, nitrogen and phosphorus, forms serious threat to Water Environment of Three Gorges.The waste water salinity that hot pickled mustard tube industry produces is up to 2%～15%, and organic contamination substrate concentration is up to 3～20g/L, and concentration of suspension is up to 7g/L, and has very high concentration of nitrogen and phosphorus.High salt preserved szechuan pickle waste water has restraining effect to microorganism active, causes traditional biological to process microorganism in the settleability variation of active sludge, bio-reactor and is difficult to assemble, and therefore, adopts traditional biological facture to process and have larger difficulty preserved szechuan pickle waste water.So the sewage disposal technology of developing the high nitrogen preserved szechuan pickle waste water of the high salt of a kind of applicable processing is significant to solving reservoir area of Three Gorges hot pickled mustard tube sewage discharge pollution.
Membrane bioreactor (MBR) is a kind of efficient biochemical sewage disposal technology that biologic treating technique and film high efficiency filter technology are combined, also referred to as film separated activated sludge method.Membrane bioreactor has the feature of efficiently holding back, and makes system water outlet concentration of suspension extremely low, but also has quick, the efficient advantage of removing of pollutent that makes.In preserved szechuan pickle waste water is processed, carry out MBR technology, can make to assemble dominant bacteria microorganisms and be not subject to the restriction of Effects of Salinity in a large number in reactor, sludge concentration in increasing system, makes microorganism more thorough to organic degraded.
Anaerobism-anoxic-aerobic activated sludge process (A
2/ O) be a kind of efficient simultaneous phosphorus and nitrogen removal technique, by anaerobic pond, anoxic pond and three pond bodies of Aerobic Pond, formed.A
2/ O has simple structure, total hrt is short, controlling run simple.
Chinese patent literature (CN102285715A) discloses a kind of hybrid mbr for the treatment of preserved szechuan pickle waste water, this technology utilizes single aerobic biologic membrane (bio-reaction zone)+membrane bioreactor (membrane separation zone) to process saliferous preserved szechuan pickle waste water, although degradable organic pollutant effectively, but it is on the low side to the total nitrogen (TN) of high nitrogen phosphorus preserved szechuan pickle waste water and total phosphorus (TP) clearance, and this technology is divided aerobic reactor zone and membrane separation zone to be arranged, floor space is larger, has increased the aeration rate of system.
Summary of the invention
Technical problem to be solved by this invention is just to provide a kind of waste disposal plant for the treatment of the high nitrogen phosphorus of high salt preserved szechuan pickle waste water, it can reduce the restraining effect of waste water salinity to microorganism, increase the concentration of mud in reactor, strengthen microorganism to organic degradation capability, the removal efficiency of TN, TP can be improved again, and floor space can be reduced.
For the above-mentioned technical problem solving, the present invention includes tactic anaerobic pond, anoxic pond and Aerobic Pond, sewage enters anaerobic pond through water inlet pipe, anaerobic pond is communicated with by the prosopyle of offering on partition wall with anoxic pond, anoxic pond is communicated with by the prosopyle of offering on partition wall with Aerobic Pond, nitrification liquid in Aerobic Pond is pumped and is back to anoxic pond through return line by reflux pump, anoxic pond is built-in with whipping appts, the membrane module that Aerobic Pond is built-in with is connected with header, and the sewage after processing is discharged by header.
Combination due to anaerobic pond-anoxic pond-Aerobic Pond and membrane bioreactor, can make on the one hand the interior sludge settling property of reactor not be subject to the impact of salinity, single aerobic biological film method be can overcome on the other hand and the inefficient shortcoming of high nitrogen phosphorus preserved szechuan pickle waste water denitrogenation phosphorus, the removal efficiency of raising system to total nitrogen total phosphorus processed.Membrane module is set in Aerobic Pond, does not set up separately membrane separation zone, reduced floor space.
So technique effect of the present invention is: reduced the restraining effect of waste water salinity to microorganism, increased the concentration of mud in reactor, strengthened microorganism to organic degradation capability, improved the removal efficiency of TN, TP, reduced floor space.
Accompanying drawing explanation
Fig. 1 is floor map of the present invention;
Fig. 2 is the 1-1 sectional view of Fig. 1;
Fig. 3 is the 2-2 sectional view of Fig. 1.
In figure: 1. anaerobic pond, 2. anoxic pond, 3. Aerobic Pond, 4. water inlet pipe, 5 prosopyles, 7. membrane module, 8. header, 9. reflux pump, 10. return line, 11. half soft biofilm packings, 12. agitators, 13. boring aeration pipes, 14. pneumatic pumps, 15. suction pumps, 16.PLC controlling box, 19. valves, 20 partition walls.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Design of the present invention is, by A
2the integral process that/O technique, biomembrane process and membrane bioreactor combine, for the treatment of the preserved szechuan pickle waste water of the high nitrogen phosphorus of high salt.
As shown in Figure 1 and Figure 2, the present invention includes tactic anaerobic pond 1, anoxic pond 2 and Aerobic Pond 3, sewage enters anaerobic pond through water inlet pipe 4, anaerobic pond 1 is communicated with by the prosopyle 5 of offering on partition wall 20 with anoxic pond 2, anoxic pond 2 is communicated with by the prosopyle 5 of offering on partition wall 20 with Aerobic Pond 3, nitrification liquid in Aerobic Pond 3 is pumped and is back to anoxic pond 2 through return line 10 by reflux pump 9, anoxic pond 2 is built-in with whipping appts 12, the membrane module 7 that Aerobic Pond 3 is built-in with is connected with header 8, and the sewage after processing is discharged by header 8.
The nitrification liquid reflux ratio that is back to anoxic pond 2 from Aerobic Pond 3 is 100%～300%.Above-mentioned membrane module 7 is hollow fiber film assembly.
In above-mentioned anaerobic pond 1, anoxic pond 2 and Aerobic Pond 3, be equipped with half soft biofilm packing 11, biofilm density is respectively 30%, 30%, 40%, for fixing the mud of the dominant bacteria in each pond, has reduced conventional A
2sludge refluxing apparatus in/O technique.
Described Aerobic Pond is provided with boring aeration pipe 13 at the bottom of 3 ponds, and hole position connects porous aeration head, and boring aeration pipe 13 is connected with the pneumatic pump 14 outside pond, forms aerating system in pond; Aerobic Pond 3 and membrane module 7 share a set of aerating system.
As shown in Figure 3, on the header 8 that each membrane module 7 connects, be respectively equipped with valve 19.By the open degree of valve 19, controlled and processed the water yield, membrane module 7 is connected by header 8 suction pump 15 external with pond; Under the film silk inside and outside differential pressure effect forming in the suction of suction pump 15, sewage is clamp-oned to membrane module 7 inside, the sewage after processing is discharged these reactors by header 8.Suction pump 15 adopts periodic running mode, takes out, between the stopping time, by PLC controlling box 16, controls.
Working process of the present invention is:
Sewage enters anaerobic pond 1 through water inlet pipe 4, under anaerobic, the polyphosphoric acid salt storing in polyP bacteria releasing body, simultaneously active absorption voltaile fatty acid (VFA), and store in vivo with the form of polyhydroxyalkanoate (PHA), so partial organic substances is removed at anaerobic pond; The water outlet of anaerobic pond 1, by the prosopyle 5 on the partition wall 20 between anaerobic pond 1 and anoxic pond 2, enters anoxic pond 2.The nitrification liquid that the carbon source that denitrifying bacteria utilization water inlet provides is electron donor and Aerobic Pond 3 backflows, for electron acceptor(EA) carries out denitrification, is gaseous nitrogen by nitrate and Nitrite transformation, to reach the object that improves TN clearance.Anoxic pond 2 is communicated with by the prosopyle 5 having on partition wall 20 with Aerobic Pond 3, and sewage enters the aerobic sludge that contacts high density in Aerobic Pond 3, and in sewage, most of organism is removed.Sewage after processing is clamp-oned membrane module 7 under the suction function of suction pump 15, and membrane module 7 is connected with header 8, and sewage is discharged outside system.
Compared with the prior art, the present invention has the following advantages as follows:
1, the present invention is equipped with half soft biofilm packing in anaerobic pond, anoxic pond and Aerobic Pond, mud is fixed on biologic packing material, and its advantage has, and the one, in each pond, can assemble a large amount of dominant bacteria microorganisms, increase the quantity of microorganism in reactor, improve the treatment efficiency of preserved szechuan pickle waste water; The 2nd, slow down the sludge bulking under high salt condition; The 3rd, microorganism is fixed on biologic packing material, can alleviate the impact that mud pollutes membrane module; The 4th, to existing A
2/ O process pool, can cancel the reflux of mud.
2, the present invention is by A
2/ O technique and membrane bioreactor organically combine, and have the advantage of two kinds of techniques concurrently, can efficiently process the preserved szechuan pickle waste water of the high nitrogen phosphorus of high salt.On the one hand, utilize the efficient crown_interception of membrane module, improve sludge concentration in reactor, make contaminant degradation more thorough; Meanwhile, hydraulic detention time (HRT) is completely separated with sludge retention time (SRT), can improve the concentration of the nitrifier of system interior generation time of length, improve nitrification efficiency; And membrane module replaces second pond to carry out mud-water separation, can reduce the impact of salinity on sludge settling property.On the other hand, due to preserved szechuan pickle waste water water inlet, TN is very high, and single aerobic membrane bioreactor denitrification percent is on the low side.By anaerobic pond, release phosphorus, the excessive suction phosphorus of Aerobic Pond, A
2in/O technique, not only can strengthen the removal of phosphorus, and by the nitrification liquid in Aerobic Pond is back to anoxic pond, intensified anti-nitrated in anoxic pond, can increase substantially the clearance of TN.
3, the present invention inserts membrane module in Aerobic Pond, and does not establish separately membrane separation zone, can save the floor space of reactor; Meanwhile, aerobic reaction pond and membrane module share a set of aerating system, can reduce aeration rate, under the effect of washing away at aeration, can clean in fenestra and mud, the organism of film surface deposition, alleviate the degree that film pollutes, make membrane flux maintain a maintenance level.
4, the biologic packing material in described anaerobic pond, anoxic pond and Aerobic Pond, constantly collision and friction, the biologic packing material of aerobic zone is also subject to the effect that aeration washes away simultaneously, wash away the mud that filling surface is aging, make the higher activity of the maintenance of microorganism on microbial film, improve the removal usefulness of microbe.
Embodiment
Main technical details is:
Total nitrogen load: 0.07～0.1 kgTN/(kgMLVSSd)
Working time: suction pump is opened 9min and stopped 2min
Biofilm density: anaerobic zone, oxygen-starved area, aerobic zone are respectively 30%, 30%, 40%
Dissolved oxygen: anaerobic zone is <0.5mg/L, oxygen-starved area is 0.5～1.0mg/L, aerobic zone is 3～4mg/L
Average hydraulic detention time: anaerobic zone is 1.5h, and oxygen-starved area is 1.5～2.5h, and aerobic zone is 8～9h
?constructing variable:
Available depth: 4～6m
The volume ratio of anaerobic zone, oxygen-starved area, aerobic zone is 1: 2: 5.
This embodiment is when best hydraulic load, the clearance of its COD, ammonia nitrogen, TN, soluble phosphate and SS is respectively 91.67%, 90.61%, 68.46%, 40.54% and 98%, contrast single aerobic biologic membrane+membrane bioreactor and process saliferous preserved szechuan pickle waste water, its total nitrogen total phosphorus removal effect is better.
What in the present invention, adopt is combined semi soft cellulose filler, be evenly distributed on the periphery of grog ring plate, tow can not come off, avoided the phenomenon of filler center conglomeration simultaneously, in the middle of plastics ring plate, flakes acupuncture spline structure can play again good water distribution, gas distribution effect, make this filler there is mass transfer effect good, do not stop up, shock-resistant, process the advantages such as stable.
Claims (5)
1. the membrane bioreactor for the treatment of the denitrogenation of preserved szechuan pickle waste water enhanced biological phosphorus removal, it is characterized in that: comprise tactic anaerobic pond (1), anoxic pond (2) and Aerobic Pond (3), sewage enters anaerobic pond (1) through water inlet pipe (4), anaerobic pond (1) is communicated with by the prosopyle (5) of offering on partition wall (20) with anoxic pond (2), anoxic pond (2) is communicated with by the prosopyle (5) of offering on partition wall (20) with Aerobic Pond (3), nitrification liquid in Aerobic Pond (3) is pumped and is back to anoxic pond (2) through return line (10) by reflux pump (9), anoxic pond (2) is built-in with whipping appts (12), the membrane module (7) that Aerobic Pond (3) is built-in with, membrane module (7) is connected with header (8), sewage after processing is discharged by header (8).
2. a kind of membrane bioreactor for the treatment of the denitrogenation of preserved szechuan pickle waste water enhanced biological phosphorus removal according to claim 1, it is characterized in that: in anaerobic pond (1), anoxic pond (2) and Aerobic Pond (3), be equipped with half soft biofilm packing (11), biofilm density is respectively 30%, 30%, 40%.
3. a kind of membrane bioreactor for the treatment of the denitrogenation of preserved szechuan pickle waste water enhanced biological phosphorus removal according to claim 2, it is characterized in that: described Aerobic Pond (3) is provided with boring aeration pipe (13) at the bottom of pond, hole position connects porous aeration head, and boring aeration pipe (13) is connected with the pneumatic pump (14) outside pond.
4. according to a kind of membrane bioreactor for the treatment of the denitrogenation of preserved szechuan pickle waste water enhanced biological phosphorus removal described in claim 1,2 or 3, it is characterized in that: the header (8) that membrane module (7) connects is provided with valve (19), membrane module (7) is connected by header (8) suction pump (15) external with pond.
5. a kind of membrane bioreactor for the treatment of the denitrogenation of preserved szechuan pickle waste water enhanced biological phosphorus removal according to claim 4, is characterized in that: the volume ratio of described anaerobic pond, anoxic pond, Aerobic Pond is 1: 2: 5.
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| CN104004644A (en) * | 2014-05-21 | 2014-08-27 | 浙江大学舟山海洋研究中心 | Wastewater microbial culture device and application thereof |
| CN104229979A (en) * | 2014-07-21 | 2014-12-24 | 三达膜环境技术股份有限公司 | MBR denitrification integrated device and application thereof |
| CN104355489A (en) * | 2014-10-31 | 2015-02-18 | 四川景星环境科技有限公司 | A2/O and MBR (Membrane Biological Reactor) combination modularized sewage treatment system |
| CN104445619A (en) * | 2014-12-18 | 2015-03-25 | 上海交通大学 | Process and device for deeply removing nitrogen and phosphorus in waste water |
| CN105254014A (en) * | 2015-11-20 | 2016-01-20 | 江苏合一水业有限公司 | Multifunctional sewage treatment pond |
| CN106746357A (en) * | 2017-01-24 | 2017-05-31 | 北京安国水道自控工程技术有限公司 | A kind of sewage-treatment plant |
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| CN107244737A (en) * | 2017-06-27 | 2017-10-13 | 四川腾颢环保工程有限公司 | Complex biological denitrification and dephosphorization method and device |
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| CN107902845A (en) * | 2017-12-07 | 2018-04-13 | 莱特莱德（北京）环境技术股份有限公司 | Portable pickling sauerkraut wastewater treatment equipment |
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| CN111704315A (en) * | 2020-06-16 | 2020-09-25 | 沈阳环境科学研究院 | High-nitrogen high-concentration organic wastewater treatment system and method for realizing same |
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| CN104004644A (en) * | 2014-05-21 | 2014-08-27 | 浙江大学舟山海洋研究中心 | Wastewater microbial culture device and application thereof |
| CN104004644B (en) * | 2014-05-21 | 2016-06-15 | 浙江大学舟山海洋研究中心 | A kind of waste water microbial cultivation device and application |
| CN104229979A (en) * | 2014-07-21 | 2014-12-24 | 三达膜环境技术股份有限公司 | MBR denitrification integrated device and application thereof |
| CN104229979B (en) * | 2014-07-21 | 2017-01-11 | 三达膜环境技术股份有限公司 | MBR denitrification integrated device and application thereof |
| CN104355489A (en) * | 2014-10-31 | 2015-02-18 | 四川景星环境科技有限公司 | A2/O and MBR (Membrane Biological Reactor) combination modularized sewage treatment system |
| CN104445619A (en) * | 2014-12-18 | 2015-03-25 | 上海交通大学 | Process and device for deeply removing nitrogen and phosphorus in waste water |
| CN104445619B (en) * | 2014-12-18 | 2016-02-17 | 上海交通大学 | Waste water advanced denitrification dephosphorization technique and device |
| CN105254014A (en) * | 2015-11-20 | 2016-01-20 | 江苏合一水业有限公司 | Multifunctional sewage treatment pond |
| CN107055774A (en) * | 2016-12-12 | 2017-08-18 | 无锡市拜沃特环保科技有限公司 | A kind of simultaneous denitrification removes algae membrane bioreactor |
| CN106746357A (en) * | 2017-01-24 | 2017-05-31 | 北京安国水道自控工程技术有限公司 | A kind of sewage-treatment plant |
| CN107055787A (en) * | 2017-06-25 | 2017-08-18 | 云南傲远环保科技有限公司 | A20+MBR processing units |
| CN107244737A (en) * | 2017-06-27 | 2017-10-13 | 四川腾颢环保工程有限公司 | Complex biological denitrification and dephosphorization method and device |
| CN107265621A (en) * | 2017-07-05 | 2017-10-20 | 中国海洋大学 | Polymer-bearing waste-water membrane bioreactor advanced treatment apparatus |
| CN107902845A (en) * | 2017-12-07 | 2018-04-13 | 莱特莱德（北京）环境技术股份有限公司 | Portable pickling sauerkraut wastewater treatment equipment |
| CN108408900A (en) * | 2018-03-29 | 2018-08-17 | 东莞市环境科学研究所 | Composite reaction device for wastewater treatment |
| CN108751624A (en) * | 2018-08-20 | 2018-11-06 | 深圳市南科环保科技有限公司 | A kind of method of the municipal decentralized wastewater of processing and combinations thereof equipment |
| CN109867358A (en) * | 2019-03-07 | 2019-06-11 | 杨林 | A kind of high-salt sewage processing system and its pool capacity and aeration method of adjustment |
| CN110372094A (en) * | 2019-07-17 | 2019-10-25 | 浙江卓锦环保科技股份有限公司 | A kind of high-salt wastewater integrated biochemical processing method |
| CN111704315A (en) * | 2020-06-16 | 2020-09-25 | 沈阳环境科学研究院 | High-nitrogen high-concentration organic wastewater treatment system and method for realizing same |
| CN112744917A (en) * | 2021-01-05 | 2021-05-04 | 境友环保科技（北京）有限公司 | Sewage treatment process without sludge reflux for dephosphorization |
| CN114853259A (en) * | 2021-02-03 | 2022-08-05 | 中国石油天然气股份有限公司 | System and method for removing total nitrogen from refining wastewater in enhanced mode |
| CN114853259B (en) * | 2021-02-03 | 2023-09-26 | 中国石油天然气股份有限公司 | Total nitrogen removal system and method for refining wastewater |
| WO2023146505A3 (en) * | 2022-01-27 | 2023-08-31 | Yildiz Teknik Universitesi Doner Sermaye Isletme Mud | A system and method for wastewater treatment and nutrient removal |
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