CN105609847B - Membrane filtration couples single chamber swash plate multianode excess sludge microbial fuel cell unit - Google Patents

Membrane filtration couples single chamber swash plate multianode excess sludge microbial fuel cell unit Download PDF

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Publication number
CN105609847B
CN105609847B CN201610116381.9A CN201610116381A CN105609847B CN 105609847 B CN105609847 B CN 105609847B CN 201610116381 A CN201610116381 A CN 201610116381A CN 105609847 B CN105609847 B CN 105609847B
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China
Prior art keywords
swash plate
anode
sludge
multianode
fuel cell
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Expired - Fee Related
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CN201610116381.9A
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Chinese (zh)
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CN105609847A (en
Inventor
张捍民
笪宗扬
王月竹
杨凤林
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Dalian University of Technology
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Dalian University of Technology
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/16—Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides a kind of membrane filtration to couple single chamber swash plate multianode excess sludge microbial fuel cell unit, belongs to field of environment engineering technology.Bottom of device is anaerobic zone sludge, and carbon felt anode is placed in the sludge of anaerobic zone, and swash plate anode is placed at middle part, and carbon felt anode and swash plate anode are connected composition multianode by wire；Carbon felt negative electrode is suspended in supernatant, and upper strata exposure is used as air cathode in atmosphere；Anode is connected by external cord with air cathode and connects an external resistance, and hollow fiber film assembly is placed in supernatant, close to cathode site.The swash plate anode that the battery is set up can increase annode area, make full use of abundant organic matter in the middle part of sedimentation basin, improve electricity production efficiency, effectively prevent Mud up-floating, decelerating membrane pollution.Anode electricity production bacterium can utilize the organic matter at sedimentation basin bottom and middle part, produce additional electrical energy, the expense of reduced residusal Treatment of Sludge, transport and landfill while reducing sedimentation basin excess sludge, caused electric energy can be stored and utilized.

Description

Membrane filtration couples single chamber swash plate multianode excess sludge microbial fuel cell unit
Technical field
The invention belongs to field of environment engineering technology, is related to excess sludge processing and technology of middle water recycle, more particularly to should Sludge reduction and energy recovery are synchronously realized with single chamber swash plate multianode microbiological fuel cell, and completes the residue of membrane filtration Sludge and sewage water treatment method.
Background technology
At present, the municipal sewage plant more than 90% uses activated sludge process or biomembrance process in the world, is handling During produce substantial amounts of excess sludge.Existing sewage treatment plant's processing sludge practices well is concentrated, dehydration and stabilized After be used further to fill out sea, burn or land use etc..But sludge of sewage treatment plant amount is big, moisture content is high, complicated component and perishable, Sludge handling process high energy consumption, input are big, cause the arbitrarily stacking of a large amount of undressed sludge or simple landfill, not only to environment Pollute, also waste the useful resources in sludge.Excess sludge content of organics is high, is a kind of potential biomass energy, It can be extracted using anaerobic digestion process from sludge after biomass energy produces biogas and be used to generate electricity.But digester needs to control temperature For scope at 30-35 DEG C, energy consumption is higher, and biogas changes into and higher energy loss in power process be present.So in normal temperature Under condition of normal pressure, produced electricity directly from sludge using organic matter, will be a kind of more efficiently energy utilization patterns.
Excess sludge microbiological fuel cell (SMFC) can directly extract biomass energy, single chamber fortune from excess sludge OK, without PEM, mud decrement is completed while electric energy is produced.SMFC anode is generally immersed at reactor bottom In the sludge in portion, negative electrode is placed in reactor upper supernatant.Electricity-producing microorganism is by produced by the organic matter in oxidates Electron transmission reaches negative electrode to anode, electronics by external circuit, and the matter of negative electrode is delivered to cathodic region dissolved oxygen and from anode region Son combines generation water, so as to which organic pollutant removal and energy regenerating be synchronously completed.If therefore excess sludge microorganism is fired Material battery is combined with sedimentation basin, then can be reduced excess sludge production under normal temperature and pressure conditionses and produce electric energy.
SMFC anode is usually placed in bottom, but also has abundant biomass energy at the middle part of sedimentation basin.Sedimentation basin simultaneously Major function be to be used for separation of solid and liquid after sewage treatment plant's biological processing unit, inclined-plate clarifying basin can be with using shallow pool theory Improve solid-liquid separation efficiency and efficiency.If using sedimentation basin bottom anaerobic environment, according to excess sludge microbiological fuel cell Electricity production principle is transformed sedimentation basin, and sets swash plate anode in sedimentation basin according to shallow pool theory, then can synchronously complete sludge Separation of solid and liquid, minimizing simultaneously utilize sedimentation basin bottom and middle part organic matter production capacity simultaneously, it is expected to are greatly lowered at excess sludge Complexity is managed, reduces sewage treatment plant's floor space, investment and operating cost.
Secondary clarifier effluent water quality can not generally meet《Urban wastewater treatment firm pollutant emission standard》(GB18918- 2002) one-level A standards, municipal sewage plant need to separately set advanced treatment process.Membrane filtration technique can provide reliable excellent water outlet Water quality, but low-yield water efficiency can drop in fouling membrane, increase operation complexity.In the excess sludge Microbial fuel by Modification of Secondary Settling Tank Cell cathode sets membrane module to filter water outlet, will can not only improve effluent quality, negative electrode can also be utilized to repel bear electroactive It sludge, can effectively mitigate fouling membrane, extend membrane module service life, reduce maintenance cost.
The content of the invention
The present invention seeks to design UF membrane coupling single chamber swash plate multianode microbiological fuel cell, synchronously complete at sewage Factory's sludge separation of solid and liquid, minimizing and production capacity are managed, while improves effluent quality of sedimentation tank.Carbon is set in sedimentation basin base sludge Felt anode, produced electricity using organic matter in sludge；Swash plate anode is set in the middle part of sedimentation basin, while improving deposition efficiency, in utilization Clear liquid organic matter produces electricity.Negative electrode is set in sedimentation basin liquid level, negative electrode nearby disposes membrane filtration module, improves sedimentation basin water outlet water Matter, and by repulsive interaction of the negative electrode for bear electropollution thing, and the barrier effect of swash plate, partial sludge can be prevented Grain floats, and can mitigate fouling membrane.
Swash plate multianode microbiological fuel cell is to carry out upgrading by the inclined-plate clarifying basin of shallow pool theory design.Tiltedly Plate sedimentation basin is remarkably improved deposition efficiency, and plate is away from the upward flow sloping plate sedimentation basin for 30-50mm, and its theoretical efficiency is up to advection 7-10 times of sedimentation basin, because the current between swash plate are laminar condition, i.e. hydraulic radius is small, more conducively precipitation separation.This hair Swash plate anode in bright can not only increase deposition efficiency, additionally it is possible to increase annode area, it is organic using being enriched in the middle part of sedimentation basin Matter, improve electricity production efficiency and effectively prevent Mud up-floating, improve effluent quality.Swash plate anode utilizes plate face deposition produce simultaneously Electricity, it is also synchronous to solve the problems, such as the deposition of swash plate surface, avoid blocking obstruction current and proton transfer between swash plate.
Effluent quality of sedimentation tank can not meet increasingly stricter water standard.Membrane bioreactor is by membrane filtration Reliable effluent quality can be obtained, but membrane module is placed in activated sludge, fouling membrane it is serious, it is necessary to frequently backwash or Aeration washes away, and energy consumption is higher.In the application, membrane module is disposed adjacent to cathode site, repels bear by the elecrtonegativity of negative electrode Electroactive sludge, it can effectively mitigate fouling membrane.The swash plate anode installed simultaneously in sedimentation basin can effectively stop mud granule Float, fouling membrane can also be mitigated, therefore under conditions of energy consumption is not increased, be expected to obtain reliable and stable effluent quality.
Technical scheme：
A kind of membrane filtration couples single chamber swash plate multianode excess sludge microbial fuel cell unit, membrane filtration coupling single chamber Swash plate multianode excess sludge microbial fuel cell unit bottom is anaerobic zone sludge 2, and carbon felt anode 3 is placed in anaerobic zone sludge In 2, middle part is placed swash plate anode 4, carbon felt anode 3 and swash plate anode 4 and is connected composition multianode by wire；Carbon felt negative electrode 9 is outstanding Float in supernatant, upper strata exposure is used as air cathode in atmosphere；Anode be connected with air cathode by external cord 7 and An external resistance 6 is connected, hollow fiber film assembly 10 is placed in supernatant, close to cathode site.
Described swash plate anode 4 is arranged with 60 ° of overturning angles.
Sewage disposal plant aeration tank discharges mud mixed liquid, after simple and stable, from single chamber swash plate multianode excess sludge Microbiological fuel cell swash plate anode bottom end vicinity enters.Mud mixed liquid upward flow promotes dirty through swash plate anode, swash plate anode Mud precipitates and stops that lighter pollutant floats, and makes most of sludge settling attached to battery bottom, the anode surface of bottom anaerobic zone Electricity production bacterium, mud decrement is completed by the use of the organic matter in precipitating sludge as anode fuel, while electricity production.Except precipitating sludge Outside, during remaining mixed liquor flows through swash plate anode, swash plate anode further extracts biomass energy in mixed liquor, reduces mixing Organic matter and electric energy is produced in liquid.Electron transmission is delivered to air cathode to anode and by external circuit as caused by electricity production bacterium, The proton that negative electrode is delivered to cathodic region dissolved oxygen and from anode region is combined generation water.Supernatant enters after membrane module filters Membrane module cavity, aspirate water outlet.
The effect and benefit of the present invention：
(1) the UF membrane coupling single chamber swash plate microbiological fuel cell of the application design can be used at city domestic sewage The transformation of factory's sedimentation basin is managed, makes it have the ability of excess sludge processing and recycling.Anode electricity production bacterium can be simultaneously using heavy Shallow lake bottom of pond portion and the organic matter at middle part, additional electrical energy is produced while reducing sedimentation basin excess sludge, reduced residusal Treatment of Sludge, Transport and the expense of landfill, caused electric energy can be stored and utilized.
(2) the swash plate anode in the UF membrane coupling single chamber swash plate microbiological fuel cell of the application design can improve heavy Shallow lake efficiency simultaneously effectively prevents mud granule from floating, and improves supernatant water quality, effectively mitigates fouling membrane；Membrane module is close to cloudy simultaneously Pole, negative electrode electric field repulsion effect nearby can also mitigate fouling membrane.
(3) hollow fiber film assembly in the UF membrane coupling single chamber swash plate microbiological fuel cell of the application design can be Whole system provides the effluent quality of good stable, and water outlet can direct reuse.Solve the problems, such as effluent quality of sedimentation tank difference, contract The expense of Jian Liao sewage treatment plants advanced treating water outlet.
(4) the improved precipitation pool structure letter of membrane filtration coupling single chamber swash plate microbiological fuel cell of the application design It is single, it is easy to maintenance, service life of equipment length, there is higher application potential and practical value.
Brief description of the drawings
Accompanying drawing is membrane filtration coupling single chamber swash plate multianode microbiological fuel cell schematic diagram.
In figure：1 mud inlet；2 anaerobic zone sludge；3 carbon felt anodes；4 swash plate anodes；5 conductive titanium silks；6 outer meeting resistances；Outside 7 Connect wires；8 monitoring computers；9 carbon felt negative electrodes；10 hollow fiber film assemblies；11 outlet pipes；12 vavuum pumps；13 effluent troughs.
Embodiment
Describe the embodiment of the present invention in detail below in conjunction with technical scheme and accompanying drawing.
Embodiment
A kind of UF membrane couples single chamber swash plate multianode excess sludge microbiological fuel cell, analogue means long 226mm, wide There is anaerobic sludge 200mm, high 250mm, bottom anaerobic zone, are exposed to immediately above in air, and anode carbon felt is placed in anaerobic zone dirt In mud, long 200mm, wide 180mm, area 360cm2.Swash plate anode carbon felt, long 200mm, wide 100mm, share four swash plates with 60 ° of tilting portions in a device, level interval 50mm, vertical interval 43mm.Hollow fiber film assembly is placed in supernatant, In the top of membrane module, a carbon felt negative electrode is placed in liquid level, and exposure above is used as air cathode in atmosphere, and long 200mm is wide 90mm, effective area 180cm2。
Activated sludge enters anaerobic zone dirt from single chamber swash plate multianode excess sludge microbiological fuel cell bottom mud inlet 1 In mud 2, swash plate anode 4 was flowed up through, the organic matter in sludge and in the mixed liquor of middle part is in bottom anode and swash plate anode table Face is degraded by electricity production bacterium and produced electronics reaches carbon felt negative electrode 9, caused H by external circuit by outer meeting resistance 6+With current Reach air cathode and generation water is combined with oxygen, caused voltage is measured and recorded by voltmeter and monitoring computer 8.Supernatant Liquid enters the cavity of hollow fiber film assembly 10, aspirates water outlet, effluent trough 13 is eventually flowed to by outlet pipe 11.

Claims (2)

1. a kind of membrane filtration couples single chamber swash plate multianode excess sludge microbial fuel cell unit, it is characterised in that film mistake Filter coupling single chamber swash plate multianode excess sludge microbial fuel cell unit bottom is anaerobic zone sludge (2), carbon felt anode (3) It is placed in anaerobic zone sludge (2), swash plate anode (4) is placed at middle part, and carbon felt anode (3) is connected with swash plate anode (4) by wire Form multianode；Carbon felt negative electrode (9) is suspended in supernatant, and upper strata exposure is used as air cathode in atmosphere；Anode and air Negative electrode is connected by external cord (7) and connects an external resistance (6), and hollow fiber film assembly (10) is placed on supernatant In, close to cathode site.
A kind of 2. membrane filtration coupling single chamber swash plate multianode excess sludge microbiological fuel cell dress according to claim 1 Put, it is characterised in that described swash plate anode (4) is arranged with 60 ° of overturning angles.
CN201610116381.9A 2016-03-01 2016-03-01 Membrane filtration couples single chamber swash plate multianode excess sludge microbial fuel cell unit Expired - Fee Related CN105609847B (en)

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CN109378508A (en) * 2018-09-30 2019-02-22 天津大学 A kind of single-chamber microbial fuel cell and its application method adding degradation class bacterium
CN110137552A (en) * 2019-04-23 2019-08-16 西安建筑科技大学 One kind having both NOxThe more cathode microbial fuel cells and method of removal and production capacity
CN110148771A (en) * 2019-05-17 2019-08-20 天津大学 A kind of appositional pattern microbiological fuel cell for oil-sludge treatment
CN111252871B (en) * 2020-02-28 2022-06-03 广东工业大学 Device for removing colloid impurities under action of static field force coupled with multistage partition plates and water power
CN112939195B (en) * 2021-02-05 2021-12-31 郑州轻工业大学 Multi-anode microbial fuel cell artificial wetland system, operation method and application
TWI826170B (en) * 2022-12-07 2023-12-11 蘇忠楨 Upright benthic microbial fuel cell module

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