CN106430565A - Combined treatment process for sewage low-consumption treatment and energy recovery based on direct carbon source conversion and biological nitrogen removal - Google Patents

Combined treatment process for sewage low-consumption treatment and energy recovery based on direct carbon source conversion and biological nitrogen removal Download PDF

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CN106430565A
CN106430565A CN201610828075.8A CN201610828075A CN106430565A CN 106430565 A CN106430565 A CN 106430565A CN 201610828075 A CN201610828075 A CN 201610828075A CN 106430565 A CN106430565 A CN 106430565A
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filter tank
anaerobic fermentation
sewage
carbon source
anoxia
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CN106430565B (en
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王志伟
孙亚东
傅炜程
王巧英
文越
虞雪晴
平梦
徐少萍
吴志超
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Tongji University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2853—Anaerobic digestion processes using anaerobic membrane bioreactors
    • 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
    • C02F3/02—Aerobic processes
    • C02F3/06—Aerobic processes using submerged filters
    • 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
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/104—Granular carriers
    • 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
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/105—Characterized by the chemical composition
    • C02F3/107—Inorganic materials, e.g. sand, silicates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2866—Particular arrangements for anaerobic reactors
    • C02F3/2893—Particular arrangements for anaerobic reactors with biogas recycling
    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/16—Total nitrogen (tkN-N)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/44—Time
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/043—Treatment of partial or bypass streams
    • 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
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Sustainable Development (AREA)
  • Inorganic Chemistry (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention relates to a combined treatment process for sewage low-consumption treatment and energy recovery based on direct carbon source conversion and biological nitrogen removal and belongs to the technical field of sewage (wastewater) treatment. A device involved in the process provided by the invention mainly consists of an anaerobic fermentation reaction zone, a membrane separation zone, an anoxic filter and an aerobic filter. After pretreatment, urban sewage is subjected to direct carbon source conversion in the anaerobic fermentation reaction zone into methane, so that energy recycling is realized; solid-liquid separation is realized in the membrane separation zone; residual organic matters, sulfide, dissolved methane and other matters in anaerobic fermentation effluent water are utilized for denitrification in the anoxic filter, and high-speed nitrification is performed in the aerobic filter, so that process effluent water TN reaches the national B-level standards. The process provided by the invention has the advantages of low running energy consumption, carbon source energy recovery and no external carbon source for nitrogen removal, and the greenhouse gas emission is avoided.

Description

A kind of directly converted based on carbon source, the sewage low consumption process of nitrogen biological eliminating and the energy Reclaim combined treatment process
Technical field
The invention belongs to environmental conservation, sewage treatment area, and in particular to one kind is directly converted based on carbon source, nitrogen is biological de- Sewage low consumption process and the energy recovery combined treatment process for removing.
Background technology
With the enforcement of conservation culture national strategy, water environment protection cause is increasingly paid attention to, and becomes society sustainable The key of development.Dirty（Useless）Water is enrichment resource, the effective carrier of the energy, under global energy, the background of resource scarcity, by dirt Water pollutant carries out the development trend that energy resource transforms into sewage disposal.Activated sludge process is current municipal sewage treatment Main stream approach, its processing core is the removal of pollutant.In order to agree with the idea of sustainable development, sewage disposal is gradually by " dirty Dye thing removal " changes to " sewage recycling, energy are processed ".
Anaerobic Microbiological Treatment Technology has that power consumption is few, the low advantage of recyclable methane gas, sludge yield, is have to send out The sewage recycling of exhibition prospect, energy treatment technology.However, anaerobic biofilter, anaerobic contact method and upflow type anaerobic dirt Mud bed reactor（UASB）Have that solid-liquid separation effect is poor Deng traditional Anaerobic Microbiological Treatment Technology, starting time length, to low concentration The low problem of sanitary sewage disposal efficiency, have impact on anerobic sowage fermentation efficiency, limit anaerobic treatment dirty in low concentration life Application in water, municipal wastewater.
Effective combine of the anaerobic membrane bioreactor by membrance separation with biological treatment then can solve the problem that these problems.With Traditional Anaerobic Methods in Treating is compared, anaerobic membrane bioreactor has that volumetric loading is high, floor space is little, effluent quality is good, The advantage that HRT and SRT are kept completely separate, membrance separation can realize the high efficient solid and liquid separation after anerobic sowage fermentation.However, anaerobism Film-bioreactor is typically only capable to remove the organic pollution in municipal sewage, relatively poor to the treatment effect of nitrogen.Therefore, Need to process the ammonia nitrogen in anaerobic membrane bioreactor water outlet further.
As, in anaerobic membrane bioreactor, most of Organic substance participates in anaerobic fermentation and removes, and general Study thinks There is carbon source deficiency in follow-up denitrification denitrogenation.However, except containing a small amount of remaining in anaerobic membrane bioreactor water outlet Outside Organic substance, also contain sulfide and dissolubility methane etc., Organic substance, sulfide and dissolubility methane all can be used as denitrifications The electron donor of process.Additionally, the presence of dissolubility methane is considered as the disadvantage that anaerobic membrane bioreactor handling process is present Disease, methane effusion can cause greenhouse gas emission, if it is possible to dissolubility methane is used for denitrification denitrogenation, not only solves temperature The potential problems of room gas discharge, and denitrogenation can be realized.
The present invention be for above-mentioned background, it is proposed that a kind of directly converted based on carbon source, the sewage of nitrogen biological eliminating low Consumption is processed and energy recovery combined treatment process, while realizing sewage low consumption process and energy recycling, is not put into On the premise of additional carbon, using the remaining Organic substance in anaerobic membrane bioreactor water outlet, sulfide, dissolubility methane etc. Material carries out denitrogenation, makes Process for Effluent TN reach country-level B standard.
Content of the invention
It is an object of the invention to propose a kind of directly converted based on carbon source, the sewage low consumption process of nitrogen biological eliminating and energy Combined treatment process is reclaimed in source.This technique mainly carries out organic matter anaerobic fermentation by anaerobic membrane bioreactor, realizes carbon source Direct energy sourceization recycle；While denitrogenation filter tank is set, on the premise of additional carbon is not added, using anaerobic membrane-life The materials such as remaining Organic substance, sulfide, dissolubility methane in thing reactor water outlet carry out nitrogen removing, reach Process for Effluent TN Country-level B standard.
Proposed by the present invention a kind of directly converted based on carbon source, the sewage low consumption process of nitrogen biological eliminating and energy recovery group Handling process is closed, the handling process is realized by processing meanss, the processing meanss include anaerobic membrane bioreactor, lack Oxygen filter tank 3 and aerobic filter tank 4；Anaerobic membrane bioreactor includes anaerobic fermentation reaction zone 1 and membrane separation zone 2, wherein：Pre- place Reason 5 bottom of water tank connection anaerobic fermentation reaction zone 1, relies on liquid level difference flow by gravity to enter anaerobism after the preprocessed water tank 5 of sewage Fermentation reaction area 1, is provided with mixing stirring device 6 in anaerobic fermentation reaction zone 1, and 1 bottom of anaerobic fermentation reaction zone is followed by sludge Ring pump 7 and pipeline connection 2 bottom side import of membrane separation zone, are provided with hollow-fibre membrane or Flat Membrane 10, anaerobism in membrane separation zone 2 1 top of fermentation reaction area and 2 top of membrane separation zone are provided with sludge circulation connecting tube 8, are connected by sludge circulation pump 7 and sludge circulation Adapter 8 forms sludge circulation between anaerobic fermentation reaction zone 1 and membrane separation zone 2；Hollow-fibre membrane or 10 top of Flat Membrane are logical Cross film and go out water pump 9 and aspirated, hollow-fibre membrane or Flat Membrane 10 goes out water pump 9 by film and pipeline connects 3 bottom of anoxia filter tank Water inlet, anoxia filter tank 3 and aerobic filter tank 4 are all using up-flow, and 3 top overfall of anoxia filter tank connects aerobic 4 bottom of filter tank Water inlet, the aerobic 4 top overflow water outlet of filter tank of up-flow, the aerobic filter tank mixed liquor in aerobic filter tank 4 is by reflux pump 11 times Flow anoxia filter tank 3；Comprise the following steps that：
(1) sewage after pretreatment carries out anaerobic fermentation in anaerobic fermentation reaction zone 1, carries out solid-liquid in membrane separation zone 2 and divides From；Carbon source in sewage is converted into methane in anaerobic fermentation process, realizes carbon source in sewage and is converted into the energy；Wherein： Anaerobic membrane bioreactor hydraulic detention time is 2 ~ 4 h；The film operating flux of hollow-fibre membrane or Flat Membrane is 6 ~ 10 L/(m2·h)；The organic loading of anaerobic fermentation reaction zone 1 is 3 ~ 5 kg/ (m3D), the sludge age in sewage is 60 ~ 100 My god；Sludge circulation pump 7 and sludge circulation connecting tube 8 form sludge circulation between anaerobic fermentation reaction zone 1 and membrane separation zone 2； The amount of sludge circulation is 200% ~ 400%；
(2) containing ammonia nitrogen, a small amount of residue carbon source, sulfide and dissolubility methane in the sewage after anaerobic fermentation energy recovery Deng material, further denitrogenation in anoxia filter tank 3 and aerobic filter tank 4, the reflux ratio for controlling anoxia filter tank 3 and aerobic filter tank 4 is 100% ~ 200%；
(3) in anoxia filter tank 3 Approach of Removal of Nitrogen mainly include heterotrophic denitrification with remaining COD as carbon source, with methane as carbon source Heterotrophic denitrification and the autotrophic denitrification with sulfide as electron donor；Ammonia nitrogen after anaerobic fermentation in sewage is in aerobic filter tank 4 In quickly nitrified；Anoxia filter tank 3 and 4 total hrt of aerobic filter tank are 4 ~ 8 h；4 water outlet TN is steady in aerobic filter tank 20 below mg/L are scheduled on, ammonia nitrogen is stable in 8 below mg/L, and water stabilization reaches country-level B discharge standard.
In the present invention, anoxia filter tank 3 and aerobic filter tank 4 are all using up-flow, and ratio of height to diameter is 8 ~ 12,3 He of anoxia filter tank The filler that aerobic filter tank 4 adopts is biological ceramic particle.
Present invention process directly carries out anaerobic fermentation based on sewage carbon source, produces biogas methane, it is achieved that sewage resource Change and recycle.Fermentation reaction area and membrane separation zone be provided separately can effective control fouling membrane, improve the aerogenesis of anaerobic fermentation Efficiency.Meanwhile, biogas circulating pump is set, using biogas, backwash is carried out to film.In anoxia, aerobic filter tank, no outer Plus under conditions of carbon source, make full use of the material in anaerobic membrane bioreactor water outlet and realize nitrogen removing, reach Process for Effluent TN To country-level B standard.
The beneficial effects of the present invention is：
（1）Anaerobic membrane bioreactor volumetric loading is high, floor space is little, effluent quality is good, HRT and SRT is kept completely separate.
（2）Anaerobic membrane bioreactor reaction zone is separated with membrane separation zone, biogas backwash being capable of the dirt of effective control film Dye, improves the gas producing efficiency of anaerobic fermentation；Membrance separation operating flux is 6 ~ 10 L/ (m2H), sludge age 60 ~ 100 days.
（3）Denitrification no additional carbon, reduces the operating cost of sewage disposal.
（4）Nitrogen removing is while remove the sulfide in sewage and dissolubility methane, it is to avoid dissolubility methane greenhouse gases Discharge.
（5）Aerobic nitrification filter tank is low due to remnant organic matter concentration, can increase substantially rate of nitrification, strong in low aeration The lower high speed nitrification that can realize ammonia nitrogen of degree.
（6）Integrated artistic has longer SRT and shorter HRT, and energy consumption is less, and can reclaim methane.
Description of the drawings
Fig. 1 be the present invention a kind of directly converted based on carbon source, the sewage low consumption process of nitrogen biological eliminating and energy recovery group Close handling process schematic diagram；
Fig. 2 be the present invention a kind of directly converted based on carbon source, the sewage low consumption process of nitrogen biological eliminating combines place with energy recovery Science and engineering skill fundamental diagram；
In figure label：1 is anaerobic fermentation reaction zone；2 is membrane separation zone；3 is anoxia filter tank；4 is aerobic filter tank；5 is pretreatment Water tank；6 is mixing stirring device；7 is sludge circulation pump；8 is sludge circulation connecting tube；9 go out water pump for film；10 is doughnut Film or Flat Membrane；11 is filter tank reflux pump.
Specific embodiment
Accompanying drawing is combined below by embodiment and further illustrate the present invention.
Embodiment 1：
The device that present invention process is adopted includes anaerobic fermentation reaction zone 1, membrane separation zone 2, anoxia filter tank 3 and aerobic filter tank 4；Its In, rely on liquid level difference flow by gravity to enter anaerobic fermentation reaction zone 1 after the preprocessed water tank 5 of sewage, stirring is set in reaction zone 1 Mixing arrangement 6 ensures that sludge is uniform, rely on sludge circulation pump 7 and sludge circulation connecting tube 8 reaction zone 1 and membrane separation zone 2 it Between formed sludge circulation；Membrane separation zone goes out water pump 9 by film and membrane module 10 is aspirated, and water outlet enters 3 bottom of anoxia filter tank Water inlet, anoxia filter tank 3 adopts up-flow, and 3 top overfall of anoxia filter tank connects aerobic 4 bottom water inlet of filter tank, up-flow The 4 top overflow water outlet of aerobic filter tank, aerobic filter tank mixed liquor is back to anoxia filter tank 3 by reflux pump 11.Sewage is carried out first Pretreatment removes large granular impurity in sewage.Reaction zone 1 of the sewage after pretreatment in anaerobic membrane bioreactor is carried out Anaerobic fermentation, carries out solid-liquid separation in membrane separation zone 2；Film intermittent suction, carries out backwash using biogas to film；In sewage Carbon source is converted into methane in anaerobic fermentation process, after membrance separation in water outlet containing ammonia nitrogen, a small amount of residue carbon source, sulfide, The materials such as dissolubility methane.Sewage after processing through anaerobic membrane bioreactor enters denitrogenation filter tank and carries out nitrogen removing, and ammonia nitrogen exists Anoxia filter tank 3 is back to after nitration reaction being carried out in aerobic filter tank 4.In anoxia filter tank 3, Approach of Removal of Nitrogen is mainly included with remaining COD For the heterotrophic denitrification of carbon source, the heterotrophic denitrification with methane as carbon source and the autotrophic denitrification with sulfide as electron donor.
Typical urban sanitary sewage is processed using above-mentioned sewage treatment process and device, inlet COD concentration is 461 ± 187 Mg/L, TN concentration is 44.6 ± 15.1 mg/L, and ammonia nitrogen concentration is 28.0 ± 7.5 mg/L.Anaerobic membrane bioreactor membrane flux For 6 L/ (m2H), the total HRT of group technology is 10h, 100 d of sludge age.Denitrogenation filter tank ratio of height to diameter is 10:1, HRT is 6 h, backflow Than for 150%.The conversion ratio of anaerobic membrane bioreactor methane is 0.14LCH4/gCOD.The total water outlet COD of technique is 15 ± 10 Mg/L, TN are 17.1 ± 1.4 mg/L, and ammonia nitrogen is 4.3 ± 2.8 mg/L, COD, TN, ammonia nitrogen removal frank respectively 96.7%, 61.7%th, 84.6%, water outlet TN reaches country-level B standard.
Embodiment 2：
Sewage treatment process and device process certain city domestic sewage southern as described in Example 1, and inlet COD concentration is 337 ± 172 mg/L, TN concentration are 48.6 ± 11.3 mg/L, and ammonia nitrogen concentration is 40.5 ± 10.2 mg/L.Anaerobic membrane bioreactor Membrane flux is 8 L/ (m2H), the total HRT of group technology is 10 h, 60 d of sludge age.Denitrogenation filter tank ratio of height to diameter is 8:1, HRT is 6 H, reflux ratio is 200%.The conversion ratio of anaerobic membrane bioreactor methane is 0.16LCH4/gCOD.The total water outlet COD of technique is 12 ± 6 mg/L, TN are 16.6 ± 2.1 mg/L, and ammonia nitrogen is 5.3 ± 2.1 mg/L, COD, TN, ammonia nitrogen removal frank respectively 96.4%, 65.8%th, 86.9%, water outlet TN reaches country-level B standard.
Embodiment 3：
Sewage treatment process and device process certain rural area sanitary sewage as described in Example 1, inlet COD concentration be 245 ± 105 mg/L, TN concentration are 37.4 ± 14.5 mg/L, and ammonia nitrogen concentration is 28.0 ± 12.6 mg/L.Anaerobic membrane bioreactor Membrane flux is 10 L/ (m2H), the total HRT of group technology is 8h, 80 d of sludge age.Denitrogenation filter tank ratio of height to diameter is 12:1, HRT is 4 H, reflux ratio is 100%.Anaerobic membrane bioreactor methane conversion is 0.12LCH4/gCOD.The total water outlet COD of technique be 18 ± 8 mg/L, TN are 16.5 ± 2.7 mg/L, and ammonia nitrogen is 2.3 ± 2.1 mg/L, COD, TN, ammonia nitrogen removal frank respectively 92.7%, 65.2%th, 93.4%, water outlet TN reaches country-level B standard.

Claims (2)

1. a kind of directly converted based on carbon source, the sewage low consumption process of nitrogen biological eliminating and energy recovery combined treatment process, its It is characterised by that the handling process is realized by processing meanss, the processing meanss include anaerobic membrane bioreactor, anoxia filter Pond（3）With aerobic filter tank（4）；Anaerobic membrane bioreactor includes anaerobic fermentation reaction zone（1）And membrane separation zone（2）, its feature It is：Pretreatment water tank（5）Bottom connects anaerobic fermentation reaction zone（1）, the preprocessed water tank of sewage（5）Liquid level difference weight is relied on afterwards Power gravity flow enters anaerobic fermentation reaction zone（1）, anaerobic fermentation reaction zone（1）Mixing stirring device is inside provided with（6）, anaerobic fermentation is anti- Answer area（1）Bottom passes through sludge circulation pump（7）Connect membrane separation zone with pipeline（2）Bottom side import, membrane separation zone（2）Inside set There are hollow-fibre membrane or Flat Membrane（10）, anaerobic fermentation reaction zone（1）Top and membrane separation zone（2）Top is provided with sludge circulation even Adapter（8）, by sludge circulation pump（7）With sludge circulation connecting tube（8）In anaerobic fermentation reaction zone（1）With membrane separation zone（2） Between formed sludge circulation；Hollow-fibre membrane or Flat Membrane（10）Top goes out water pump by film（9）Aspirated, hollow-fibre membrane Or Flat Membrane（10）Water pump is gone out by film（9）Connect anoxia filter tank with pipeline（3）Bottom water inlet, anoxia filter tank（3）With aerobic Filter tank（4）All using up-flow, anoxia filter tank（3）Top overfall connects aerobic filter tank（4）Bottom water inlet, up-flow is aerobic Filter tank（4）Top overflow water outlet, aerobic filter tank（4）Interior aerobic filter tank mixed liquor passes through reflux pump（11）It is back to anoxia filter tank （3）；Comprise the following steps that：
(1) sewage after pretreatment is in anaerobic fermentation reaction zone（1）Anaerobic fermentation is carried out, in membrane separation zone（2）Carry out solid-liquid Separate；Carbon source in sewage is converted into methane in anaerobic fermentation process, realizes carbon source in sewage and is converted into the energy；Its In：Anaerobic membrane bioreactor hydraulic detention time is 2 ~ 4 h；The film operating flux of hollow-fibre membrane or Flat Membrane be 6 ~ 10 L/(m2·h)；Anaerobic fermentation reaction zone（1）Organic loading be 3 ~ 5 kg/ (m3D), the sludge age in sewage is 60 ~ 100 days；Sludge circulation pump（7）With sludge circulation connecting tube（8）In anaerobic fermentation reaction zone（1）With membrane separation zone（2）Between shape Become sludge circulation；The amount of sludge circulation is 200% ~ 400%；
(2) containing ammonia nitrogen, a small amount of residue carbon source, sulfide and dissolubility methane in the sewage after anaerobic fermentation energy recovery Deng material, in anoxia filter tank（3）With aerobic filter tank（4）In further denitrogenation, control anoxia filter tank（3）With aerobic filter tank（4）'s Reflux ratio is 100% ~ 200%；
(3) anoxia filter tank（3）Middle Approach of Removal of Nitrogen mainly includes heterotrophic denitrification with remaining COD as carbon source, with methane as carbon source Heterotrophic denitrification and the autotrophic denitrification with sulfide as electron donor；Ammonia nitrogen after anaerobic fermentation in sewage is in aerobic filter tank （4）In quickly nitrified；Anoxia filter tank（3）With aerobic filter tank（4）Total hrt is 4 ~ 8 h；Aerobic filter tank（4） Water outlet TN is stable in 20 below mg/L, and ammonia nitrogen is stable in 8 below mg/L, and water stabilization reaches country-level B discharge standard.
2. handling process according to claim 1, it is characterised in that anoxia filter tank（3）With aerobic filter tank（4）All using liter Streaming, ratio of height to diameter is 8 ~ 12, anoxia filter tank（3）With aerobic filter tank（4）Using filler be biological ceramic particle.
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Cited By (7)

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CN107384753A (en) * 2017-08-15 2017-11-24 西安建筑科技大学 A kind of efficient anaerobic fermentation bioreactor of dynamic membrane
CN107935178A (en) * 2017-11-15 2018-04-20 中国铁道科学研究院 A kind of railway middle and small stations area low ratio of carbon to ammonium sewage treatment unit
CN109775863A (en) * 2019-03-06 2019-05-21 清华大学 High concentrated organic wastewater anaerobism embrane method water handling reclamation set and technique
CN111422986A (en) * 2020-04-10 2020-07-17 北京交通大学 Autotrophic and heterotrophic coupling sewage deep denitrification device and method based on sulfur cycle
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CN114054482A (en) * 2021-11-15 2022-02-18 西安建筑科技大学 Device and method for preparing high-concentration dissolved carbon source from kitchen waste
CN116835761A (en) * 2023-07-04 2023-10-03 重庆大学 Method for directionally regulating and controlling internal carbon source to denitrification and reactor thereof
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