CN205442786U - Anaerobism - little oxygen membrane bioreactor - Google Patents

Anaerobism - little oxygen membrane bioreactor Download PDF

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Publication number
CN205442786U
CN205442786U CN201520995627.5U CN201520995627U CN205442786U CN 205442786 U CN205442786 U CN 205442786U CN 201520995627 U CN201520995627 U CN 201520995627U CN 205442786 U CN205442786 U CN 205442786U
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membrane
anaerobism
micro
anaerobic
bioreactor
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CN201520995627.5U
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Inventor
吴静
汤久凯
李中华
安大龙
曹知平
盛飞
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Beijing Yongtai Yicheng Chemical Technology Co ltd
Beijing Lucency Enviro Tech Co Ltd
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Beijing Yongtai Yicheng Chemical Technology Co ltd
Beijing Lucency Enviro Tech Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The utility model provides an anaerobism little oxygen membrane bioreactor belongs to waste water anaerobic biological treatment technical field. The utility model discloses combine together upflow anaerobic sludge bed reactor (UASB) main part and two -stage membrane module, the main part includes granular sludge anaerobic reaction zone, three -phase separator, settling zone and biogas collection system, the two -stage membrane module is the milipore filter subassembly respectively and receives the filter membrane subassembly, and milipore filter subassembly bottom is equipped with aeration systems. By the milipore filter subassembly with receive the concentrate recirculation that the filter membrane subassembly held back and form little oxygen environment to settling zone bottom back, under little oxygen environment, the organic matter of difficult degradation is further degraded. This reactor volumetric loading when difficult degradation organic waste water such as processing pharmacy, coal industry can reach 15kgCOD (m3 d) to be controlled. The utility model provides a when using UASB to handle refractory wastewater as the high - rate anaerobic reaction ware of representative among the prior art, water conservancy dwell time is long, the effect is unsatisfactory and the not good problem of effect is got rid of to traditional anaerobic membrane bioreactor membrane serious pollution, difficult degradation organic matter.

Description

A kind of anaerobism-micro-aerobic membrane bioreactor
Technical field
This utility model relates to a kind of micro-aerobic membrane bioreactor of anaerobism, belongs to anaerobic biological wastewater treatment field.
Background technology
High-concentration hardly-degradable organic industrial sewage yield is high, environmental hazard is big, and simple employing aerobe technology or materialization technical finesse cost are the highest.Use Anaerobic Methods in Treating can significantly reduce cost for wastewater treatment, the energy can be reclaimed again.
Anaerobic reactor load is low, the shortcoming of hydraulic detention time length (typically having ten a couple of days to tens of skies) to overcome tradition with upflow anaerobic sludge blanket process (UASB) reactor (as shown in Figure 1) high efficiency anaerobic reactor as representative, significantly shorten hydraulic detention time (being typically only several hours to several days), improve organic loading.But the reactors such as UASB are when processing organic wastewater with difficult degradation thereby, but need the longer time of staying, the liquid phase liter Flow Velocity causing inside reactor is too small, and the mass transfer between microorganism and pollutant can not get ensureing, therefore the removal of hard-degraded substance is in bad order.Therefore, when this kind of anaerobic reactor processes used water difficult to degradate, it is limited by extend hydraulic detention time improving pollutant removal.Because prolongation hydraulic detention time, cause that reactor volume is big, rough sledding that investment and running cost increase.
At present, on the basis of being thoroughly mixed formula anaerobic reactor (CSTR), increase membrane module and have developed anaerobic membrane bioreactor (as shown in Figure 2).Conventional anaerobic membrane bioreactor typically uses ultrafiltration or micro-filtration membrane (membrane aperture scope is 0.04 0.4 μm), solid matter and the colloids such as the mud that can retain spilling, but it is not enough to the interception capacity of dissolved organic matter, when processing hardly degraded organic substance, required hydraulic detention time is the longest.Anaerobic membrane bioreactor is when processing organic wastewater, and owing to organic concentration and floc sludge concentration are high, fouling membrane is the most serious, and membrane module rinses and maintenance cost is higher.It addition, this membrane reactor uses the biological activity of floc sludge, to can not show a candle to granule sludge good, and reaction rate is relatively low.Anaerobic membrane bioreactor is mainly used in the municipal sewage treatment that organic concentration is relatively low at present, and its COD is only about 400mg/L.Anaerobic membrane bioreactor generally uses biogas backflow to control fouling membrane, but biogas itself is inflammable gas, uses safety requirements high, and the cost ratio air that biogas controls fouling membrane is high.
Utility model content
In order to overcome high efficiency anaerobic reactor and the deficiencies of common anaerobic membrane bioreactor such as upflow anaerobic sludge blanket process (UASB), the utility model proposes a kind of micro-aerobic membrane bioreactor of anaerobism, this reactor is enable effectively to control fouling membrane, retain hardly degraded organic substance, extend its time of staying in the reactor, it is achieved the pollutant time of staying is more than hydraulic detention time.
The technical solution of the utility model is as follows:
A kind of micro-aerobic membrane bioreactor of anaerobism, containing up flow anaerobic sludge blanket reactor main part, this main part contains granule sludge anaerobic reaction district, three phase separator, settling zone and collecting methane system, it is characterized in that: the micro-aerobic membrane bioreactor of described anaerobism also includes external membrane module, external membrane module includes that hyperfiltration membrane assembly and nanofiltration membrane component, ultrafilter membrane water inlet are connected with settling zone outlet;Ultrafilter membrane outlet is connected with NF membrane water inlet with suction pump by pipeline;NF membrane outlet is provided with suction pump;NF membrane water return outlet is connected with bottom settling zone with return duct respectively through respective reflux pump with ultrafilter membrane water return outlet, is provided with air aeration system bottom hyperfiltration membrane assembly;Arranging polymer carrier in described settling zone, polymer carrier uses center concatenation suspended structure.
Preferably, arranging reaction zone circulating pump and reaction zone return duct outside granule sludge anaerobic reaction district, this return duct is connected with the water inlet pipe in granule sludge anaerobic reaction district.
Preferably, described ultrafilter membrane is hollow-fibre membrane or Flat Membrane, and aperture is 0.04~0.4 μm;Described NF membrane aperture is 1~2nm.
Preferably, described polymer carrier is Fypro or TPO.
Preferably, air aeration system uses batch (-type) air pocket air aeration system.
This utility model is compared with prior art, have the following advantages and the technique effect of salience: center concatenation suspension type polymer carrier is set in settling zone and forms packing area, the crown_interception of this packing area greatly alleviates the pollutional load of subsequent film assembly, and micro-oxygen environment in this region can tame out the further degradable organic pollutant of dominant bacteria.Relative to ultrafiltration and microfiltration membrance separation, this membrane module is set up the nanofiltration membrane component that aperture is less, the dissolubility hardly degraded organic substance that energy molecular cut off is relatively small, hardly degraded organic substance time of staying in the reactor and hydraulic detention time are separated, substantially increase the treatment effeciency of hardly degraded organic substance.During the high concentration hard-degraded organic waste water such as treatment of pharmacy, coal chemical industrial waste water, reactor volume load is up to 15kgCOD/ (m3D) left and right.This reactor fouling membrane is light, and when processing high concentrated organic wastewater, fouling membrane situation is close with the aerobic membrane bioreactor of Treating Municipal Sewage.The safety of system is good, is better than the common anaerobic membrane bioreactor using biogas to control fouling membrane.
Accompanying drawing explanation
Fig. 1 is UASB structure of reactor schematic diagram in prior art.
Fig. 2 is anaerobic membrane bioreactor structural representation in existing skill.
A kind of anaerobism micro-aerobic membrane bioreactor structural representation that Fig. 3 provides for this utility model.
In figure: 1-granule sludge anaerobic reaction district;2-settling zone;3-hyperfiltration membrane assembly;4-nanofiltration membrane component;5-intake pump;6-water inlet pipe;7-granule sludge;8 reaction zone return ducts;9 reaction zone circulating pumps;10-three phase separator;11 polymer carriers;12-collecting methane system;13-packing area outlet pipe;14 aerators;15-aeration tube;16 hyperfiltration membrane assembly outlet pipes;17 hyperfiltration membrane assembly suction pumps;18-nanofiltration membrane component suction pump;19-nanofiltration membrane component outlet pipe;20-nanofiltration membrane component reflux pump;21-hyperfiltration membrane assembly reflux pump;22 membrane module return ducts.
Detailed description of the invention
Below in conjunction with the accompanying drawings to structure of the present utility model, principle be embodied as being further described.
The micro-aerobic membrane bioreactor of a kind of anaerobism that this utility model provides is to propose in the theory that the high efficiency anaerobic reactors such as UASB and membrane separation technique combine, its structure is as shown in Figure 3, this reactor contains up flow anaerobic sludge blanket reactor main part, and this main part contains granule sludge anaerobic reaction district 1, three phase separator 10, settling zone 2 and collecting methane system 12;The micro-aerobic membrane bioreactor of described anaerobism also includes that external membrane module, external membrane module include hyperfiltration membrane assembly 3 and nanofiltration membrane component 4.Ultrafilter membrane is hollow-fibre membrane or Flat Membrane, and aperture is 0.04~0.4 μm;NF membrane aperture is 1~2nm.Ultrafilter membrane water inlet is connected with settling zone outlet, and ultrafilter membrane outlet is connected with NF membrane water inlet with hyperfiltration membrane assembly suction pump 17 by pipeline;NF membrane outlet is provided with nanofiltration membrane component suction pump 18;NF membrane water return outlet is connected with bottom settling zone with membrane module return duct 22 through nanofiltration membrane component reflux pump 20;Ultrafilter membrane water return outlet is connected with bottom settling zone with membrane module return duct 22 through hyperfiltration membrane assembly reflux pump 21.Arranging the polymer carrier such as Fypro or TPO 11 in described settling zone 2, polymer carrier uses center concatenation suspended structure.Arranging the air aeration system being made up of aerator 14 and aeration tube 15 bottom described hyperfiltration membrane assembly, this air aeration system preferably uses air batch (-type) air pocket air aeration system.Arranging reaction zone circulating pump 9 and reaction zone return duct 8 outside described granule sludge anaerobic reaction district 1, this return duct is connected with the water inlet pipe 6 in granule sludge anaerobic reaction district.
Work process of the present utility model is as follows: waste water is entered granule sludge anaerobic reaction district by the intake pump 5 of reactor bottom, water inlet pipe 6, flow speed control is 10~20m/h, substrate in waste water is fully contacted reaction with the anaerobic grain sludge 7 in reactor, most of Organic substance in waste water is converted into biogas, and biogas is collected by collecting methane system 12.When water inlet meets impact load, reaction zone circulating pump 9 and reaction zone return duct 8 reflux dilution intake.Major part granule sludge returns to bottom, granule sludge anaerobic reaction district due to three phase separator 10 effect, and small part granule sludge flow to settling zone with water, is retained by polymer carrier 11 subsequently, and the pollutional load of subsequent film assembly alleviates significantly.Settling zone water outlet is entered hyperfiltration membrane assembly 3 by packing area outlet pipe 13, aerator 14 and aeration tube 15 hyperfiltration membrane assembly is carried out batch (-type) air pocket air aeration, and the aeration intensity of every square metre of membrane area is 0.20~0.25m3/ h, and control hyperfiltration membrane assembly water outlet dissolved oxygen 3~4mg/L, turbidity (NTU) is less than or equal to 1, ultrafilter membrane often run 7~8 minutes after aeration 1~2 minutes.After hyperfiltration membrane assembly suction pump 17 is aspirated, ultrafilter membrane produces water and is drained into nanofiltration membrane component 4 by hyperfiltration membrane assembly outlet pipe 16, and controlling NF membrane operation pressure is 3.5~30bar.After nanofiltration membrane component suction pump 18 is aspirated, NF membrane is produced water and is discharged by outlet pipe 19.The high-concentration waste water retained by ultrafilter membrane and NF membrane is back to bottom settling zone by hyperfiltration membrane assembly reflux pump 21 and nanofiltration membrane component reflux pump 20 through membrane module return duct 22 respectively, and form micro-oxygen environment, control filler bottom oxide reduction potential ORP at 0mV~100mV.Owing to environmental condition is different, settling zone can tame out corresponding dominant bacteria under micro-oxygen environment, and the organic pollution that under anaerobic degradation effect is bad will be degraded further in this district.
This utility model can make hardly degraded organic substance clearance in waste water be greatly improved, and fouling membrane effectively alleviates, and effluent quality is improved, and operation stability is enhanced.This reactor controls fouling membrane in terms of two: the first, the source produced from fouling membrane controls.The Extracellular polymers etc. produced essentially from colloid, free microorganism or little zoogloea and microorganism due to fouling membrane, therefore system is without floc sludge, uses granule sludge to alleviate fouling membrane;Polymer carrier is set in the settling zone of UASB and forms packing area, reduce the concentration of the free microorganism in waste water, zoogloea and Extracellular polymers with biomembrane, suppress the generation source of fouling membrane further.The second, the air aeration of high intensity is used to control the formation of fouling membrane at hyperfiltration membrane assembly.Nanofiltration membrane component (NF membrane aperture is 1 2nm, can molecular cut off be about the Organic substance of more than 150-500 dalton) is set up, it is possible to retain major part ultrafilter membrane and do not fail to retain and not and the Organic substance of degraded after hyperfiltration membrane assembly.This reactor is not simple anaerobic reactor, but anaerobism+micro-oxygen reactor.Hyperfiltration membrane assembly uses aerobic control, bottom the concentrate recirculation that hyperfiltration membrane assembly and nanofiltration membrane component are trapped to settling zone, it is possible to form micro-oxygen environment in this district.Under micro-oxygen environment, part dominant bacteria is tamed, and can remove removal organic polluter further.Granule sludge anaerobic reaction district is gone back in landing by the biomembrane that settling zone comes off.After two-stage membrane module filters, Chinese effluent.

Claims (5)

1. the micro-aerobic membrane bioreactor of anaerobism, containing up flow anaerobic sludge blanket reactor main part, this main part contains granule sludge anaerobic reaction district (1), three phase separator (10), settling zone (2) and collecting methane system (12), it is characterized in that: the micro-aerobic membrane bioreactor of described anaerobism also includes external membrane module, external membrane module includes hyperfiltration membrane assembly (3) and nanofiltration membrane component (4), and ultrafilter membrane water inlet is connected with settling zone outlet;Ultrafilter membrane outlet is connected with NF membrane water inlet with hyperfiltration membrane assembly suction pump (17) by pipeline;NF membrane outlet is provided with nanofiltration membrane component suction pump (18);NF membrane water return outlet is connected with bottom settling zone with return duct respectively through respective reflux pump with ultrafilter membrane water return outlet;Air aeration system it is provided with bottom hyperfiltration membrane assembly;Arranging polymer carrier (11) in described settling zone (2), polymer carrier uses center concatenation suspended structure.
A kind of micro-aerobic membrane bioreactor of anaerobism the most according to claim 1, it is characterized in that: arranging reaction zone circulating pump (9) and reaction zone return duct (8) in outside, granule sludge anaerobic reaction district (1), this return duct is connected with the water inlet pipe (6) in granule sludge anaerobic reaction district.
A kind of micro-aerobic membrane bioreactor of anaerobism the most according to claim 1 and 2, it is characterised in that: described ultrafilter membrane is hollow-fibre membrane or Flat Membrane, and aperture is 0.04~0.4 μm;Described NF membrane aperture is 1~2nm.
A kind of micro-aerobic membrane bioreactor of anaerobism the most according to claim 3, it is characterised in that: described polymer carrier is Fypro or TPO.
A kind of micro-aerobic membrane bioreactor of anaerobism the most according to claim 1, it is characterised in that: air aeration system uses batch (-type) air pocket air aeration system.
CN201520995627.5U 2015-12-03 2015-12-03 Anaerobism - little oxygen membrane bioreactor Withdrawn - After Issue CN205442786U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105366806A (en) * 2015-12-03 2016-03-02 清华大学 Anaerobic-micro-aerobic membrane bioreactor and operation method thereof
CN107475080A (en) * 2017-08-08 2017-12-15 北京航空航天大学 A kind of anaerobic organism digestion device for being used for space station or space ship
CN108793399A (en) * 2018-06-11 2018-11-13 大连民族大学 External immersion electro-catalysis anaerobic membrane biological reaction device
CN109761347A (en) * 2019-02-28 2019-05-17 武汉理工大学 Based on the denitrifying sewage plant Tailwater Depth denitrogenation method of anaerobe and device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105366806A (en) * 2015-12-03 2016-03-02 清华大学 Anaerobic-micro-aerobic membrane bioreactor and operation method thereof
CN107475080A (en) * 2017-08-08 2017-12-15 北京航空航天大学 A kind of anaerobic organism digestion device for being used for space station or space ship
CN107475080B (en) * 2017-08-08 2021-06-04 北京航空航天大学 Anaerobic organism digestion device for space station or interstellar airship
CN108793399A (en) * 2018-06-11 2018-11-13 大连民族大学 External immersion electro-catalysis anaerobic membrane biological reaction device
CN109761347A (en) * 2019-02-28 2019-05-17 武汉理工大学 Based on the denitrifying sewage plant Tailwater Depth denitrogenation method of anaerobe and device

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Granted publication date: 20160810

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