CN109368791A - The method for realizing short-cut denitrification Anammox by adding sludge fermentation object - Google Patents

The method for realizing short-cut denitrification Anammox by adding sludge fermentation object Download PDF

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CN109368791A
CN109368791A CN201811388618.4A CN201811388618A CN109368791A CN 109368791 A CN109368791 A CN 109368791A CN 201811388618 A CN201811388618 A CN 201811388618A CN 109368791 A CN109368791 A CN 109368791A
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sludge
continuous flow
anoxic
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彭永臻
杨玉峰
沈琛
张国亮
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Beijing University of Technology
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
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  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

Belong to city domestic sewage biological treatment field by adding the method that sludge fermentation object realizes short-cut denitrification Anammox.The device is mainly by sludge anaerobic fermentation reactor, sewage raw water water tank, sludge fermentation object container, sewage treatment continuous flow UCT reactor, secondary settling tank composition.Carbon source is insufficient in city domestic sewage, it is difficult to realize stable short-cut denitrification.Sludge fermentation produces a variety of short chain fatty acids that acid phase generates in hydrolysis and is easily utilized, this method is not under the conditions of needing to add outer carbon source, the carbon source being largely easily degraded is provided by the short chain fatty acids in sludge fermentation object for biological phosphate-eliminating and short-cut denitrification, nitrite nitrogen is provided for Anammox reaction, it can be simultaneously reached energy-saving, the purpose of mud decrement.

Description

The method for realizing short-cut denitrification Anammox by adding sludge fermentation object
Technical field
The method that the present invention relates to a kind of to realize short-cut denitrification Anammox by adding sludge fermentation object, belongs to company Afterflow activated sludge process application field.
Background technique
City domestic sewage C/N in China's is lower at present, lacks sufficient carbon source.Traditional waste water treatment process needs external carbon Source, a large amount of to be aerated, operating cost and maintenance are higher.And as the discharge standard of sewage treatment is continuously improved, using tradition The water factory of technique is extremely difficult to standard.This proposes new problem to sewage treatment field.
Anammox refers to that anaerobic ammonium oxidizing bacteria is under anaerobic electron acceptor by ammonia nitrogen oxygen using nitrite Turn to the autotrophy process of nitrogen.Anaerobic ammonia oxidizing bacteria is autotrophic bacterium, the excess sludge generated using Anammox technological system It will reduce.Due to the particular advantages on energy-saving and environmental-friendly, the denitrogenation technology quilt based on Anammox principle It is generally recognised as the bio-denitrification technology of current most application prospect.But its slow growth and substrate, which obtain condition harshness and limit, to be detested The development and application of anaerobic ammonium oxidation technology.
Short-cut denitrification technology is that the process control of whole denitrification i.e. nitrate-nitrogen reduction to nitrogen is being reduced to nitrous State nitrogen makes nitrite nitrogen persistent accumulation, provides sufficient substrate for Anammox reaction.Since short-cut denitrification does not both need Aeration, and reduce the hot spot of 60% carbon source needed as Recent study.Realize that short-cut denitrification generally requires alkaline ring Border, C/N ratio are 3, and sodium acetate is the conditions such as carbon source, but processing sanitary sewage difficulty is larger in practical projects, and operating cost Increase.Therefore it finds the economic and practical method of one kind and realizes that short-cut denitrification becomes the most important thing.
Sewage plant processing excess sludge deals carefully with the hot spot that environmental area concern is had become with disposition, is not influencing dirt Under the premise of water treatment efficiency, the sewage disposal technology of low residual sludge yield is developed, the environment for reducing excess sludge is influenced It is particularly important.Excess sludge cellular material is destroyed using hydrolysis acidification bacterium, mud decrement is promoted to can yet be regarded as a kind of good side Method, the Sources decreasing of sludge not only may be implemented in it, but also realizes using a variety of short chain fatty acids of excess sludge release Short-cut denitrification, this has positive effect to low-carbon-source waste water dephosphorization denitrification effect is improved
Summary of the invention
For the realization of short-cut denitrification, the present invention provides by realizing sewage using not processed sludge fermentation object The denitrifying accumulation of continuous stream handle medium or short range, and further autotrophic denitrification is reacted by Anammox.Residual activity is dirty Mud passes through hydrolysis under anaerobic and produces a large amount of short chain fatty acids of acid generation, and wherein the content of acetic acid is most, a variety of mixed acid It can be realized short-cut denitrification as carbon source, utilized, continually strengthen by anaerobic ammonia oxidizing bacteria again when nitrite generates Short-cut denitrification bacterium, becomes superiority bacteria spp.This method is exactly to realize short distance using the short chain fatty acids in sludge fermentation object Denitrification anaerobic ammoxidation, to realize that sewage water denitrification and Treatment of Sludge provide possibility.
The system for realizing short-cut denitrification Anammox by adding sludge fermentation object, it is characterised in that: including sewage Raw water water tank (1), sludge fermentation object storage drum (2), sewage treatment continuous flow reactor (3), sedimentation basin (4);Sewage raw water water Case is connected by water inlet pipe (1.1) and water inlet peristaltic pump (1.2) with continuous flow reactor (3);Sludge fermentation object container (2) is logical It crosses and adds pipe (2.1) and peristaltic pump (2.2) is connected with continuous flow reactor (3);Sewage treatment continuous flow reactor (3) includes detesting Oxygen section (3.1), anoxic section (3.2) and aerobic section (3.3), anaerobism section (3.1): anoxic section (3.2): the appearance of aerobic section (3.3) Product is than being 2:3:4;Anaerobism (3.1) section is equipped with anaerobism blender (3.4);Aerobic section (3.3) uses air pump (3.5), aeration tube (3.6) it is persistently aerated with aeration head (3.7);Anoxic section (3.2) is equipped with anoxia stirring device (3.8) anoxic section and is equipped with sponge filler frame (3.9), packing ratio is 30%~40%, and anaerobic ammonia oxidizing bacteria is grown in Active biological filler in the form of fixing film;Sewage Processing continuous flow reactor (3) is connected by outlet pipe (4.1) with sedimentation basin (4);Sludge in sedimentation basin passes through sludge reflux Pipe (4.2) and sludge reflux pump (4.3) are connect with the first lattice of the anoxic section (3.2) of sewage treatment continuous flow reactor (3);It lacks Last lattice in oxygen section (3.2) are connect by return pipe (4.4) and reflux pump (4.5) with (3.1) first lattice of anaerobism section.It is aerobic Section (3.3) last lattice pass through the first lattice of nitrification liquid return pipe (4.6) and nitrification liquid reflux pump (4.7) and anoxic section (3.2) Connection.
1) by add sludge fermentation object realize short-cut denitrification Anammox method, which is characterized in that including with Lower step:
2) inoculation municipal wastewater treatment plant secondary settling tank returned sludge keeps reactor in sewage treatment continuous flow reactor (3) Sludge concentration is in 3000mg/L~5000mg/L.Sludge fermentation object refer to municipal wastewater treatment plant secondary settling tank returned sludge ph10 ± 0.2, in 8500~10000mg/L, temperature, fermentation under conditions of 30 ± 2 DEG C, residence time are 6~8 days generates sludge concentration Substance.
3) raw water is entered together with the returned sludge from anoxic section (3.2) last lattice by water inlet peristaltic pump (1.2) (3.1) first lattice of anaerobism section, reflux ratio are 100%~150%.Anaerobism section (3.1) is equipped with anaerobism blender (3.4), is detested Oxygen stirring, hydraulic detention time are 2~4h.
4) mixed liquor flows into anoxic section (3.2) head end by anaerobism section end, and sludge fermentation object is pumped by peristaltic pump (2.2) Enter (3.2) first lattice of anoxic section to continuous flow reactor (3), wherein add daily sludge fermentation object amount and daily inflow Than being 1/80~1/75, it is equipped with anoxia stirring device (3.8) and carries out anoxia stirring, hydraulic detention time is 4~5h.In anoxic section (3.2) Anammox sponge filler frame (3.9) are placed, carries out autotrophic denitrification.
5) from anoxic section (3.2), last lattice enters aerobic section (3.3) mixed liquor, opens air pump, is controlled by aeration plate Oxygen in water is 1.5-5.0mg/L, and aerobic hydraulic detention time is 2~4h.
6) nitrification liquid passes through nitrification liquid return pipe (4.6) and nitrification liquid reflux pump (4.7) from aerobic section (3.3) last lattice Flow back into the first lattice of anoxic section (3.2), reflux ratio 200%.
7) mixed liquor enters sedimentation basin (4) water inlet mud-water separation from aerobic section (3.3) outflow, and supernatant is discharged into drainpipe Road, precipitating sludge flow back into sewage treatment continuous flow reactor (3) by mud return line (4.2) and sludge reflux pump (4.3) Anoxic section (3.2) the first lattice, reflux ratio be 100%~200%.
8) continuous operation continuous flow reactor (3) reach until nitrogen removal rate reaches 62.5% or more, COD removal rate 70% or more, anoxic end nitrous accumulation rate reaches 40% or more, it is believed that continuous flow reactor starts successfully.Long-term running water outlet Water quality is as follows: TN is 12~15mg/L, NH4 +- N is 0~2mg/L, NO2 N is 0.5~0.8mg/L, NO3 N is 8~10mg/L, COD is 30~40mg/L.
9) by adding sludge fermentation object in anoxic section (3.2), dosage and daily inflow volume ratio be 1/80~ 1/75, and Anammox sponge filler frame (3.9) is placed, packing ratio is 30%~40%, is transported under the mode of A/O/A/O Row successfully realizes the part autotrophic denitrification and mud decrement of city domestic sewage.
The method for realizing short-cut denitrification Anammox by adding sludge fermentation object, mainly has the advantage that
(1) denitrification process is controlled to the nitrite stage using the short chain fatty acids in sludge fermentation object, realize short distance Denitrification breaks through the problem that city domestic sewage continuous flow medium or short range denitrification is difficult to realize, and sludge fermentation phase cell It is dissolved out a large amount of dissolubility COD and also provides a large amount of organic matter for biological denitrification system.
(2) realization of short-cut denitrification provides response matrix for Anammox reaction, realizes and be not required to add outer carbon Heterotrophism denitrogenation and part autotrophic denitrification on the basis of source.
(3) to the disposition of excess sludge, a large amount of operating cost is saved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for realizing the system of short-cut denitrification Anammox by adding sludge fermentation object
In Fig. 1: 1 is raw water water tank, and 2 be sludge fermentation object storage drum, and 4 be sedimentation basin, and 1.1 pass through for sewage raw water water tank Water inlet pipe, 1.2 be water inlet peristaltic pump, and 2.1 is add pipe, and 2.2 be peristaltic pump, and 3.1 be anaerobism section, and 3.2 be anoxic section, and 3.3 are Aerobic section, 3.4 be anaerobism blender, and 3.5 be air pump, and 3.6 be aeration tube, and 3.7 be aeration tube, and 3.8 anoxics are blender, 3.9 It is outlet pipe for sponge filler, 4.1,4.2 be mud return line, and 4.3 be sludge reflux pump, and 4.4 be return pipe, and 4.5 be reflux Pump, 4.6 nitrification liquid return pipes, 4.7 be nitrification liquid reflux pump.
Specific embodiment:
The system for realizing short-cut denitrification Anammox by adding sludge fermentation object, it is characterised in that: including sewage Raw water water tank (1), sludge fermentation object storage drum (2), sewage treatment continuous flow reactor (3), sedimentation basin (4);Sewage raw water water Case is connected by water inlet pipe (1.1) and water inlet peristaltic pump (1.2) with continuous flow reactor (3);Sludge fermentation object container (2) is logical It crosses and adds pipe (2.1) and peristaltic pump (2.2) is connected with continuous flow reactor (3);Sewage treatment continuous flow reactor (3) includes detesting Oxygen section (3.1), anoxic section (3.2) and aerobic section (3.3), anaerobism section (3.1): anoxic section (3.2): the appearance of aerobic section (3.3) Product is than being 2:3:4;Anaerobism (3.1) section is equipped with anaerobism blender (3.4);Aerobic section (3.3) uses air pump (3.5), aeration tube (3.6) it is persistently aerated with aeration head (3.7);Anoxic section (3.2) is equipped with anoxia stirring device (3.8) anoxic section and is equipped with sponge filler frame (3.9), packing ratio is 30%~40%, and anaerobic ammonia oxidizing bacteria is grown in Active biological filler in the form of fixing film;Sewage Processing continuous flow reactor (3) is connected by outlet pipe (4.1) with sedimentation basin (4);Sludge in sedimentation basin passes through sludge reflux Pipe (4.2) and sludge reflux pump (4.3) are connect with the first lattice of the anoxic section (3.2) of sewage treatment continuous flow reactor (3);It lacks Last lattice in oxygen section (3.2) are connect by return pipe (4.4) and reflux pump (4.5) with (3.1) first lattice of anaerobism section.It is aerobic Section (3.3) last lattice pass through the first lattice of nitrification liquid return pipe (4.6) and nitrification liquid reflux pump (4.7) and anoxic section (3.2) Connection.
Specific water quality of intaking during test is as follows:
Concrete operations are as follows:
1) inoculation municipal wastewater treatment plant secondary settling tank returned sludge keeps reactor in sewage treatment continuous flow reactor (3) Sludge concentration is in 3000mg/L~5000mg/L or so;Return sludge ratio is 200%;Anoxic section (3.2) flows back into anaerobism section (3.1) reflux ratio is 150%;Mixed liquid recycle ratio is 200%;The dissolved oxygen of aerobic section (3.3) is controlled in 1.5~5.0mg/ L;Hydraulic detention time is 13.5h;Sludge age 90d.
2) sludge fermentation object with municipal wastewater treatment plant secondary settling tank returned sludge ph10 ± 0.2, sludge concentration 8500~ 10000mg/L, temperature 30 ± 2 DEG C, the residence time be 6 days under conditions of ferment the substance of generation.Sludge fermentation object refers mainly to Mark as follows: TN is 300 ± 20mg/L, NH4 +- N be 200 ± 20mg/L, SCOD be 3000 ± 500mg/L, SCFAs be 1000 ± 200mg/L。
3) raw water is entered together with the returned sludge from anoxic section (3.2) last lattice by water inlet peristaltic pump (1.2) (3.1) first lattice of anaerobism section, anaerobism section (3.1) are equipped with anaerobism blender (3.4), carry out anaerobism stirring.Mixed liquor is by anaerobism section End flows into anoxic section (3.2) head end, and sludge fermentation object is pumped into lacking for continuous flow reactor (3) by peristaltic pump (2.2) (3.2) first lattice of oxygen section, wherein add daily sludge fermentation object amount and daily inflow ratio be 1/80~1/75, be equipped with anoxic Blender (3.8) carry out anoxia stirring, anoxic section (3.2) place Anammox sponge filler, packing ratio be 30%~ 40%.Mixed liquor enters aerobic section (3.3) from anoxic section (3.2) last lattice.Nitrification liquid is logical from aerobic section (3.3) last lattice It crosses nitrification liquid reflux pump (4.7) and flows back into (3.2) first lattice of anoxic section.
4) during experiment operation, continuous flow reactor (3) does not have to deliberately control temperature and PH.
5) continuous operation continuous flow reactor (3) reach until nitrogen removal rate reaches 62.5% or more, COD removal rate 70% or more, anoxic end nitrous accumulation rate reaches 40% or more, it is believed that continuous flow reactor starts successfully.
6) after system starts successfully, the autotrophic denitrification and mud decrement of city domestic sewage are realized.
7) during experiment operation, effluent quality is as follows: TN is 12~15mg/L, NH4 +- N is 0~2mg/L, NO2 N is 0.5 ~0.8mg/L, NO3 N is 8~10mg/L, and COD is 30~40mg/L, stably reaches country-level emission standard A.
It is a specific embodiment of the invention above, is better understood on and applies convenient for the those skilled in the art The present invention, embodiments of the present invention are not limited only to this, thus field technical staff to the simple modifications done of the present invention all Within that scope of the present invention.

Claims (2)

1. the system for realizing short-cut denitrification Anammox by adding sludge fermentation object, it is characterised in that: including sewage original Water tank (1), sludge fermentation object storage drum (2), sewage treatment continuous flow reactor (3), sedimentation basin (4);Sewage raw water water tank It is connected by water inlet pipe (1.1) and water inlet peristaltic pump (1.2) with continuous flow reactor (3);Sludge fermentation object container (2) passes through It adds pipe (2.1) and peristaltic pump (2.2) is connected with continuous flow reactor (3);Sewage treatment continuous flow reactor (3) includes anaerobism Section (3.1), anoxic section (3.2) and aerobic section (3.3), anaerobism section (3.1): anoxic section (3.2): the volume of aerobic section (3.3) Than for 2:3:4;Anaerobism (3.1) section is equipped with anaerobism blender (3.4);Aerobic section (3.3) uses air pump (3.5), aeration tube (3.6) It is persistently aerated with aeration head (3.7);Anoxic section (3.2) is equipped with anoxia stirring device (3.8), and anoxic section is equipped with sponge filler frame (3.9), packing ratio is 30%~40%, and anaerobic ammonia oxidizing bacteria is grown in Active biological filler in the form of fixing film;Sewage Processing continuous flow reactor (3) is connected by outlet pipe (4.1) with sedimentation basin (4);Sludge in sedimentation basin passes through sludge reflux Pipe (4.2) and sludge reflux pump (4.3) are connect with the first lattice of the anoxic section (3.2) of sewage treatment continuous flow reactor (3);It lacks Last lattice in oxygen section (3.2) are connect by return pipe (4.4) and reflux pump (4.5) with (3.1) first lattice of anaerobism section;It is aerobic Section (3.3) last lattice pass through the first lattice of nitrification liquid return pipe (4.6) and nitrification liquid reflux pump (4.7) and anoxic section (3.2) Connection.
2. the method for application system as described in claim 1, which comprises the following steps:
1) inoculation municipal wastewater treatment plant secondary settling tank returned sludge keeps continuous flow reaction in sewage treatment continuous flow reactor (3) Device sludge concentration is in 3000mg/L~5000mg/L;Sludge fermentation object refer to municipal wastewater treatment plant secondary settling tank returned sludge pH10 ± 0.2, in 8500~10000mg/L, temperature, fermentation under conditions of 30 ± 2 DEG C, residence time are 6~8 days generates sludge concentration Substance;
2) raw water enters anaerobism together with the returned sludge from anoxic section (3.2) last lattice by water inlet peristaltic pump (1.2) (3.1) first lattice of section, reflux ratio are 100%~150%;Anaerobism section (3.1) is equipped with anaerobism blender (3.4), carries out anaerobism and stirs It mixes, hydraulic detention time is 2~4h;
3) mixed liquor flows into anoxic section (3.2) head end by anaerobism section end, and sludge fermentation object is pumped by peristaltic pump (2.2) (3.2) first lattice of anoxic section of continuous flow reactor (3), wherein adding the amount and daily inflow volume of sludge fermentation object daily Than being 1/80~1/75, it is equipped with anoxia stirring device (3.8) and carries out anoxia stirring, hydraulic detention time is 4~5h;In anoxic section (3.2) Anammox sponge filler frame (3.9) are placed, carries out Anammox reaction;
4) from anoxic section (3.2), last lattice enters aerobic section (3.3) mixed liquor, opens air pump, is controlled in water by aeration plate Dissolved oxygen is 1.5-5.0mg/L, and aerobic hydraulic detention time is 2~4h;
5) nitrification liquid is flowed back from aerobic section (3.3) last lattice by nitrification liquid return pipe (4.6) and nitrification liquid reflux pump (4.7) To the first lattice of anoxic section (3.2), reflux ratio 200%;
6) mixed liquor enters sedimentation basin (4) water inlet mud-water separation from aerobic section (3.3) outflow, and supernatant is discharged into drainage pipeline, sinks Shallow lake sludge flows back into the anoxic of sewage treatment continuous flow reactor (3) by mud return line (4.2) and sludge reflux pump (4.3) First lattice of section (3.2), reflux ratio are 100%~200%;
7) continuous operation continuous flow reactor (3) reach 70% until nitrogen removal rate reaches 62.5% or more, COD removal rate More than, anoxic end nitrous accumulation rate reaches 40% or more, it is believed that continuous flow reactor starts successfully;
8) by adding sludge fermentation object in anoxic section (3.2), dosage and daily inflow volume ratio are 1/80~1/75, System continuous operation.
CN201811388618.4A 2018-11-21 2018-11-21 The method for realizing short-cut denitrification Anammox by adding sludge fermentation object Pending CN109368791A (en)

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WO2020220922A1 (en) * 2019-04-30 2020-11-05 北京工业大学 Method and apparatus for treating urban sewage by coupling anaerobic ammonia oxidation with endogenous short-range denitrification of anoxic zone of aoa process
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CN112456641A (en) * 2020-10-16 2021-03-09 北京工业大学 Device and method for realizing continuous flow synchronous short-cut nitrification and denitrification dephosphorization based on sludge side treatment
CN112456641B (en) * 2020-10-16 2022-04-22 北京工业大学 Device and method for realizing continuous flow synchronous short-cut nitrification and denitrification dephosphorization based on sludge side treatment
CN113387529A (en) * 2021-04-08 2021-09-14 北京工业大学 Efficient sludge reduction synchronous carbon and nitrogen removal system and treatment method based on system
CN113387529B (en) * 2021-04-08 2023-01-24 北京工业大学 Efficient sludge reduction synchronous carbon and nitrogen removal device and device-based treatment method
CN113929210A (en) * 2021-08-18 2022-01-14 北京工业大学 Device and method for enhancing carbon source utilization and deep denitrification in mainstream municipal sewage by fermenting and producing acid through side flow sludge
CN113955851A (en) * 2021-08-18 2022-01-21 北京工业大学 Post-selection anoxic/aerobic internal carbon source reinforced municipal sewage deep denitrification device and method

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Application publication date: 20190222