CN109019862A - The device and method of intermittent aerating synchronous nitration and denitrification combined short period denitrification anaerobic ammoxidation realization domestic sewage advanced denitrogenation - Google Patents
The device and method of intermittent aerating synchronous nitration and denitrification combined short period denitrification anaerobic ammoxidation realization domestic sewage advanced denitrogenation Download PDFInfo
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- CN109019862A CN109019862A CN201810996498.XA CN201810996498A CN109019862A CN 109019862 A CN109019862 A CN 109019862A CN 201810996498 A CN201810996498 A CN 201810996498A CN 109019862 A CN109019862 A CN 109019862A
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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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
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Abstract
The device and method that domestic sewage advanced denitrogenation is realized in intermittent aerating synchronous nitration and denitrification combined short period denitrification anaerobic ammoxidation, belong to field of biological sewage treatment.Device includes excess sludge fermentor, separator for mud and water, raw water water tank, intermediate water tank, two batch-type sbr reactor devices, air compressor machines, peristaltic pump etc..Method is that the first sequencing batch reactor is added in sanitary sewage, is acted under intermittent aerating mode by synchronous nitration and denitrification and removes whole ammonia nitrogens and most of total nitrogen；Its draining enters together with the sludge fermentation liquid after mud-water separation in the second sequencing batch reactor, and nitrous and nitrate nitrogen couple Anammox by short-cut denitrification and remove more than institute, final to realize domestic sewage advanced denitrogenation.The present invention is suitable for low C/N city domestic sewage, can reduce aeration quantity, reduces energy consumption, is homogenized organic concentration in sanitary sewage, slows down organic matter depletion rate, improves nitric efficiency, while realizing the resource utilization of excess sludge.
Description
Technical field
The present invention relates to realize life using the denitrification anaerobic ammoxidation of intermittent aerating synchronous nitration and denitrification combined short period
The Optimized-control Technique of sewage deep denitrogenation living, belongs to city domestic sewage biological treatment field.This technique is suitable for low C/N
The advanced nitrogen of city domestic sewage.
Background technique
With the sustainable growth and continuous improvement of people's living standards of population, discharge amount persistently increases sanitary sewage per capita
Add, in addition the generally use of detergent, nitrogen and phosphorus content is higher in municipal sewage, contains nitrogen in receiving water body, phosphorus after being discharged into water body
Amount increases, and then will lead to water eutrophication, destroys water body environment, influences water supply quality.In April, 2015, State Council are formal
It issues " water prevention and cure of pollution action plan ", referred to as " ten, water "；Enhance conservation culture in 18 the fifth plenary sessions October in 2015
Construction is written into for the first time in national five-year-plan, and water prevention and cure of pollution are the piths of national Ecological Civilization Construction, is eliminated black smelly
Water body solves the problems, such as that nitrogen and phosphorus pollution has critically important realistic meaning for China's water prevention and cure of pollution and water environment protection.With
Revision of the Chinese Ministry of Environmental Protection to " urban wastewater treatment firm pollutant emission standard " (GB18918-2002), the promulgation of " ten, water "
And country increasingly payes attention to conservation culture, it is meant that sewage treatment plant proposes mark transformation to realize town domestic sewage depth
Denitrogenation dephosphorizing is imperative, therefore New Technology about Wastewater Treatment also comes into being.
It, will by the nitrobacteria under aerobic condition in standard biologic denitrification process for the mechanism of biological denitrificaion
NH4 +- N is converted into NO3 -- N and NO2 -- N, then heterotrophic denitrifying Bacteria under anoxic conditions using additional carbon as electron donor also
Former nitrate nitrogen and nitrite nitrogen are nitrogen, this process needs a large amount of aeration energy consumption, simultaneously because city domestic sewage water
Greatly, C/N is low, needs a large amount of additional carbon, and processing cost sharply increases.
For sewage disposal technology, activated sludge process is current most widely used dirty water living creature processing technique, is had
The advantages that operational management is convenient, effluent quality is good.Traditional microbiological denitrogenation technology include microorganism nitrification and anti-nitre
Change effect, nitrification refer to that ammonia nitrogen is oxidized to nitrite nitrogen and nitre state under the action of autotrophic type nitrifier under aerobic environment
Nitrogen；Denitrification refers to the process of that under anaerobic environment, oxidation state nitrogen is reduced to nitrogen by heterotroph denitrifying bacterium.Therefore, it reflects
In the otherness of nitrifier and denitrifying bacterium growing environment, majority biological denitrification process all separates aerobic zone and anoxic zone at present
It opens, is implemented separately from time or space by the way of interval or respectively in different reactors.And synchronize nitre
Changing denitrification technology can then realize in a reactor except carbon, nitrification and denitrification, be not necessarily to additional carbon, capital expenditure
Low, economic operating cost has critically important realistic meaning.It is also at current sewage that short-cut denitrification, which couples Anammox technology,
The hot spot in reason field, ammonia nitrogen can be converted to a large amount of nitrate nitrogen under aerobic conditions, may be implemented by short-cut denitrification technology
NO2 -A large amount of accumulation of-N, to provide matrix for anaerobic ammonia oxidizing bacteria, Anammox, which reacts generated nitrate nitrogen, still may be used
To be removed by the above process, so as to realize the advanced nitrogen of sanitary sewage.This process time-consuming is short, short-cut denitrification
Bacterium can be coexisted with anaerobic ammonia oxidizing bacteria under same anaerobic environment, concerted reaction.
In sludge anaerobic fermentation process, macromolecular organic granular is converted to the end based on volatile fatty acid in sludge
Product is held, the degradable organic matter in this part can be used as the high-quality carbon source during biological carbon and phosphorous removal, de- to improve sewage
Nitrogen phosphor-removing effect, while realizing the recycling treatment of excess sludge.But the activity of methanogen can consume the production of hydrolysis acidification stage
Raw VFA etc., is unfavorable for the accumulation of carbon source, so fermentation processes should be enabled to produce acid phase.Some researches show that sludge hairs
Zymotic fluid can realize stable NO during short-cut denitrification2 -The accumulation of-N, while NH can also be provided4 +- N is used as anaerobism
The substrate of ammoxidation reaction is conducive to the engineer application for promoting short-cut denitrification coupling Anammox technology.So to understand
Certainly the problem of excess sludge resource utilization, sewage treatment plant's depth can be realized by exploitation excess sludge anaerobic fermented liquid
Denitrogenation.
Realize that domestic sewage advanced is de- by intermittent aerating synchronous nitration and denitrification combined short period denitrification anaerobic ammoxidation
The method of nitrogen, has the advantage that
1, it by 15min aeration stirring/15min anoxia stirring alternate run intermittent aerating mode, may be implemented to nitrify
It is equal with denitrification rate, so that redox and basicity are balanced in reaction process, to realize continually and steadily same
The generation for walking nitration denitrification reaction, improves nitrogen removal rate；
2, high-frequency intermittent aerating mode advantageously reduces rapidly depleting and being homogenized organic for carbon source organic matter in raw water
The concentration of object is conducive to the accumulation of PHB in microbial body, solves low-carbon sewage and is deposited when synchronous nitration and denitrification process occurs
In the problem of carbon source deficiency, the removal rate of total nitrogen is improved；
3, high-frequency intermittent aerating operational mode can make total air demand in reaction time reduce, this is not only conducive to save
It can lower consumption, and also help the hypoxemia microenvironment condition in maintenance system；
4, NO during short-cut denitrification may be implemented using sludge fermentation liquid2 -The higher accumulation rate of-N is anaerobism ammonia oxygen
Change reaction provide matrix, be conducive to short-cut denitrification coupling Anammox reaction stablize realize, and saved carbon source at
This；
5, using two-stage SBR, ammonia nitrogen can be completely removed in first sbr reactor device, and most of total nitrogen also can be by
Removal, remaining NO3 -- N and NO2 -- N enters second sbr reactor device, by ammonia nitrogen provided by sludge fermentation liquid and can
The organic carbon source of degradation realizes the coupling of short-cut denitrification Anammox reaction, to realize advanced nitrogen；
6, the resource utilization of excess sludge may be implemented in the use of sludge fermentation liquid.
Summary of the invention
In view of the deficiencies of the prior art, the present invention proposes that one uses intermittent aerating synchronous nitration and denitrification combined short period anti-
The New Technology about Wastewater Treatment of nitrifying anaerobic ammonia oxidation realizes city domestic sewage advanced nitrogen, and sanitary sewage is pumped into the first SBR
Reactor is taken the intermittent aerating mode of the aerobic stirring alternate run of 15min anoxia stirring/15min, can be stored in anoxic section
Internal carbon source can be enriched with aerobic denitrifying bacteria in aerobic section, and mineralized nitrogen is nitrate nitrogen and nitrite nitrogen by nitrobacteria, then
It is nitrogen that aerobic denitrifying bacteria, which utilizes degradable organic matter synchronous with internal carbon source for nitrate nitrogen and nitrite nitrogen denitrification,.Due to
Carbon source is insufficient in sanitary sewage, and synchronous nitration and denitrification effect not can be carried out completely, remaining nitrate nitrogen and nitrite nitrogen
It can enter in second sbr reactor device, can be nitrite nitrogen by whole nitrate-nitrogen reductions using additional sludge fermentation liquid,
Carry out Anammox reaction together with the ammonia nitrogen in sludge fermentation liquid later, 11% nitrate nitrogen caused by Anammox
The removal of this process can also be repeated, to realize advanced nitrogen.
The present invention is achieved through the following technical solutions:
Domestic sewage advanced denitrogenation is realized in intermittent aerating synchronous nitration and denitrification combined short period denitrification anaerobic ammoxidation
Device: the device, which includes excess sludge, is pumped into excess sludge fermentor (2), excess sludge fermentor by the first peristaltic pump (1)
(2) the first blender (3), the first pH, DO controller (4) are installed in；Excess sludge fermentor (2) and separator for mud and water (5) are even
It connects, fermentation liquid holding vessel (6) is connected by the second peristaltic pump (7) with the second sequencing batch reactor (17)；Raw water water tank (8) is logical
Third peristaltic pump i.e. intake pump (9) is crossed to connect with the first sequencing batch reactor (10)；Installation in first sequencing batch reactor (10)
Second blender (11), the 2nd pH, DO controller (12)；Aeration plate (13) and air compressor machine in first sequencing batch reactor (10)
(14) it connects, the first sequencing batch reactor (10) is connect with intermediate water tank (15)；Intermediate water tank (15) passes through the 4th peristaltic pump
(16) it is connect with the second sequencing batch reactor (17)；Third blender (18), third are installed in the second sequencing batch reactor (17)
PH, DO controller (19)；In addition, the process controller (21) that setting is connected with computer (20), to control the first peristaltic pump
(1), the second peristaltic pump (7), third peristaltic pump (9), the 4th peristaltic pump (16), the first blender (3), the second blender (11),
Third blender (18), the first pH, DO controller (4), the 2nd pH, DO controller (12), the 3rd pH, DO controller (19), sky
Press (14) and separator for mud and water (5)；
Operation the following steps are included:
Excess sludge fermentor (2) is semi batch reacor, wherein the excess sludge SCOD added is 15~50mg/L,
SCFAs is 10~25mg COD/L, NH4 +- N is 1~5mg/L, and sludge concentration is 7000~8000mg/L, sludge retention time
SRT was controlled at 6~8 days, controlled pH 9~10；Excess sludge fermenting mixture is discharged daily according to SRT to take after high speed centrifugation
Supernatant is discharged into fermentation liquid holding vessel (6) and isometric excess sludge is added to excess sludge fermentor (2)；Excess sludge hair
Index in zymotic fluid is as follows: SCOD is 2500~4000mg/L, and SCFAs is 1000~2000mgCOD/L, NH4 +- N be 100~
250mg/L；
First sequencing batch reactor (10) each cycle successively undergoes water inlet, intermittent aerating, and (15min anoxia stirring/15min exposes
Gas agitating alternate run), 3 processes of sedimentation and drawing；Second sequencing batch reactor (17) each cycle successively undergoes water inlet, adds hair
4 zymotic fluid, anoxia stirring, sedimentation and drawing processes；
First sequencing batch reactor:
I, fill phase: water inlet set inflow as the 1/2~2/3 of reactor effective volume from raw water water tank water intake, logical
Cross time control switch control；
II, intermittent aerating stage: after water inlet enter the intermittent aerating stage, by process controller control air compressor machine and
Second blender realizes 15min anoxia stirring/15min aeration stirring alternate run, and 30min is a circulation, a period 8
~10 circulations control dissolved oxygen in 0.5mg/L~1mg/L by the 2nd pH, DO controller, control pH in 6-8；
III, sedimentation and drawing stage: sedimentation and drawing sets 0.5~1h of sedimentation time, drain after mud-water separation, is discharged into
Between water tank, draining than be 50%~80%.
Second sequencing batch reactor:
I, fill phase: setting inflow as the 1/2~4/5 of reactor effective volume, will be intermediate by the 4th peristaltic pump
The sewage of water tank is pumped into the second sequencing batch reactor；
II, the fermentation liquid stage is added: into 1/50~1/10 that sludge fermentation liquid product is water inlet volume, excess sludge fermentation
Fermenting mixture in tank is by putting into supernatant in fermentation liquid hold-up tank after centrifugation, after system starting, during water inlet,
Fermentation liquid in fermentation liquid hold-up tank enters the second sequencing batch reactor by the second peristaltic pump；
III, anoxia stirring stage: anoxia stirring sets mixing time as 1~2h；
IV, sedimentation and drawing stage: sedimentation and drawing sets 0.5~1h of sedimentation time, drains after mud-water separation, and draining ratio is
50%~75%.
Compared with traditional denitrification process, which is had the advantages that
1, it by 15min aeration stirring/15min anoxia stirring alternate run intermittent aerating mode, may be implemented to nitrify
It is equal with denitrification rate, so that redox and basicity are balanced in reaction process, to realize continually and steadily same
The generation for walking nitration denitrification reaction, improves nitrogen removal rate；
2, high-frequency intermittent aerating mode advantageously reduces rapidly depleting and being homogenized organic for carbon source organic matter in raw water
The concentration of object is conducive to the accumulation of PHB in microbial body, solves low-carbon sewage and is deposited when synchronous nitration and denitrification process occurs
In the problem of carbon source deficiency, the removal rate of total nitrogen is improved；
3, high-frequency intermittent aerating operational mode can make total air demand in reaction time reduce, this is not only conducive to save
It can lower consumption, and also help the hypoxemia microenvironment condition in maintenance system；
4, NO during short-cut denitrification may be implemented using sludge fermentation liquid2 -The higher accumulation rate of-N is anaerobism ammonia oxygen
Change reaction provide matrix, be conducive to short-cut denitrification coupling Anammox reaction stablize realize, and saved carbon source at
This；
5, using two-stage SBR, ammonia nitrogen can be completely removed in first sbr reactor device, and most of total nitrogen also can be by
Removal, remaining NO3 -- N and NO2 -- N enters second sbr reactor device, by ammonia nitrogen provided by sludge fermentation liquid and can
The organic carbon source of degradation realizes the coupling of short-cut denitrification Anammox reaction, to realize advanced nitrogen；
6, the resource utilization of excess sludge may be implemented in the use of sludge fermentation liquid.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram of apparatus of the present invention
In figure: 1 --- the first peristaltic pump；2 --- excess sludge fermentor；3 --- the first blender；4 --- the first pH,
DO controller；5 --- separator for mud and water；6 --- fermentation liquid hold-up tank；7 --- the second peristaltic pump；8 --- raw water water tank；
9 --- third peristaltic pump；10 --- the first sequencing batch reactor；11 --- the second blender；12 --- the 2nd pH, DO control
Device；13 --- aeration plate；14 --- air compressor machine；15 --- intermediate water tank；16 --- the 4th peristaltic pump；17 --- the second batch-type
Reactor；18 --- third blender；19 --- the 3rd pH, DO controller；20 --- computer；21 --- process controller；
Fig. 2 is the method for operation of reactor in the present invention
Specific embodiment
The application patent is further illustrated in conjunction with attached drawing and example: as shown in Figure 1, the present invention includes excess sludge fermentation
Tank, sludge fermentation liquid holding vessel, sewage water tank, intermediate water tank, the first sequencing batch reactor, the second sequencing batch reactor.Six
The effective volume of device is 5L, 3L, 30L, 30L, 12L, 12L respectively, wherein excess sludge fermentor, sludge fermentation liquid holding vessel
It is made with sequencing batch reactor SBR of organic glass；Intermediate water tank, sewage water tank are made of organic plastics.
The device includes that excess sludge is pumped into excess sludge fermentor (2) by the first peristaltic pump (1), excess sludge fermentation
First blender (3), the first pH, DO controller (4) are installed in tank (2)；Excess sludge fermentor (2) and separator for mud and water
(5) it connects, fermentation liquid holding vessel (6) is connected by the second peristaltic pump (7) with the second sequencing batch reactor (17)；Raw water water tank
(8) it is connect by third peristaltic pump, that is, intake pump (9) with the first sequencing batch reactor (10)；First sequencing batch reactor (10)
The second blender of middle installation (11), the 2nd pH, DO controller (12)；Aeration plate (13) in first sequencing batch reactor (10) with
Air compressor machine (14) connection, the first sequencing batch reactor (10) are connect with intermediate water tank (15)；Intermediate water tank (15) is compacted by the 4th
Dynamic pump (16) connect with the second sequencing batch reactor (17)；Middle installation third blender (18) of second sequencing batch reactor (17),
3rd pH, DO controller (19)；In addition, the process controller (21) that setting is connected with computer (20), compacted to control first
Dynamic pump (1), the second peristaltic pump (7), third peristaltic pump (9), the 4th peristaltic pump (16), the first blender (3), the second blender
(11), third blender (18), the first pH, DO controller (4), the 2nd pH, DO controller (12), the 3rd pH, DO controller
(19), air compressor machine (14) and separator for mud and water (5)；
City domestic sewage used in specific example is derived from the septic tank of Beijing dependents' district, wherein COD
COD is in 180~200mg/L, NH4 +The concentration of-N is in 60~70mg/L, PO4 3-The concentration of-P exists in 5.0~7.5mg/L, C/N
2~4.
Specific implementation process is as follows:
Excess sludge fermentor (2) is semi batch reacor, wherein the excess sludge SCOD added is 15~50mg/L,
SCFAs is 10~25mg COD/L, NH4 +- N is 1~5mg/L, and sludge concentration is 7000~8000mg/L, sludge retention time
SRT was controlled at 6~8 days, controlled pH 9~10；Excess sludge fermenting mixture is discharged daily according to SRT to take after high speed centrifugation
Supernatant is discharged into fermentation liquid holding vessel (6) and isometric excess sludge is added to excess sludge fermentor (2)；Excess sludge hair
Index in zymotic fluid is as follows: SCOD is 2500~4000mg/L, and SCFAs is 1000~2000mgCOD/L, NH4 +- N be 100~
250mg/L；
First sequencing batch reactor (10) each cycle successively undergoes water inlet, intermittent aerating, and (15min anoxia stirring/15min exposes
Gas agitating alternate run), 3 processes of sedimentation and drawing；Second sequencing batch reactor (17) each cycle successively undergoes water inlet, adds hair
4 zymotic fluid, anoxia stirring, sedimentation and drawing processes；
First sequencing batch reactor:
I, fill phase: water inlet set inflow as the 1/2~2/3 of reactor effective volume from raw water water tank water intake, logical
Cross time control switch control；
II, intermittent aerating stage: after water inlet enter the intermittent aerating stage, by process controller control air compressor machine and
Second blender realizes 15min anoxia stirring/15min aeration stirring alternate run, and 30min is a circulation, a period 8
~10 circulations control dissolved oxygen in 0.5mg/L~1mg/L by the 2nd pH, DO controller, control pH 7 or so；
III, sedimentation and drawing stage: sedimentation and drawing sets 0.5~1h of sedimentation time, drain after mud-water separation, is discharged into
Between water tank, draining than be 50%~80%.IV anoxia stirring sets mixing time 2h, and Denitrifying Phosphate Accumulating Organisms utilize oxidation state nitrogen
NOx- is that electron acceptor carries out denitrifying phosphorus uptake, while denitrifying bacterium carries out anti-nitre using the carbon source that the fermentation of hydrolysis acidification bacterium generates
Change；
Second sequencing batch reactor:
I, fill phase: setting inflow as the 1/2~4/5 of reactor effective volume, will be intermediate by the 4th peristaltic pump
The sewage of water tank is pumped into the second sequencing batch reactor；
II, the fermentation liquid stage is added: into 1/50~1/10 that sludge fermentation liquid product is water inlet volume, excess sludge fermentation
Fermenting mixture in tank after system starting, is being intake by putting into supernatant in fermentation liquid hold-up tank after supercentrifuge
In the process, the fermentation liquid in fermentation liquid hold-up tank enters the second sequencing batch reactor by the second peristaltic pump；
III, anoxia stirring stage: anoxia stirring sets mixing time as 1~2h；
IV, sedimentation and drawing stage: sedimentation and drawing sets 0.5~1h of sedimentation time, drains after mud-water separation, and draining ratio is
50%~75%.
The results showed that adding the intermittent aerating synchronous nitration and denitrification coupling short-cut denitrification anaerobism of sludge fermentation liquid
Ammonia oxidation process is, it can be achieved that low C/N city domestic sewage advanced nitrogen, while the available resource utilization of excess sludge.Out
COD concentration is 30~43mg/L, NH in water4 +- N concentration is 0.2~0.5mg/L, and TN removal rate is 95~99%.
Claims (2)
1. the dress of intermittent aerating synchronous nitration and denitrification combined short period denitrification anaerobic ammoxidation realization domestic sewage advanced denitrogenation
Set, how feature is: the device includes the excess sludge fermentor (2) connecting with the first peristaltic pump (1), excess sludge fermentation
First blender (3), the first pH, DO controller (4) are installed in tank (2)；Excess sludge fermentor (2) and separator for mud and water (5)
Connection, fermentation liquid holding vessel (6) are connected by the second peristaltic pump (7) with the second sequencing batch reactor (17)；Raw water water tank (8)
It is connect by third peristaltic pump, that is, intake pump (9) with the first sequencing batch reactor (10)；Peace in first sequencing batch reactor (10)
Fill the second blender (11), the 2nd pH, DO controller (12)；Aeration plate (13) and pneumatics in first sequencing batch reactor (10)
Machine (14) connection, the first sequencing batch reactor (10) are connect with intermediate water tank (15)；Intermediate water tank (15) passes through the 4th peristaltic pump
(16) it is connect with the second sequencing batch reactor (17)；Third blender (18), third are installed in the second sequencing batch reactor (17)
PH, DO controller (19)；In addition, the process controller (21) that setting is connected with computer (20), to control the first peristaltic pump
(1), the second peristaltic pump (7), third peristaltic pump (9), the 4th peristaltic pump (16), the first blender (3), the second blender (11),
Third blender (18), the first pH, DO controller (4), the 2nd pH, DO controller (12), the 3rd pH, DO controller (19), sky
Press (14) and separator for mud and water (5).
2. application device as described in claim 1 method, feature the following steps are included:
Excess sludge fermentor (2) is semi batch reacor, wherein the excess sludge SCOD added is 15~50mg/L, SCFAs
For 10~25mg COD/L, NH4 +- N is 1~5mg/L, and sludge concentration is 7000~8000mg/L, sludge retention time SRT control
At 6~8 days, pH was controlled 9~10；It discharges excess sludge fermenting mixture daily according to SRT and takes supernatant after high speed centrifugation
It is discharged into fermentation liquid holding vessel (6) and isometric excess sludge is added to excess sludge fermentor (2)；In excess sludge fermentation broth
Index is as follows: SCOD is 2500~4000mg/L, and SCFAs is 1000~2000mgCOD/L, NH4 +- N is 100~250mg/L；
First sequencing batch reactor (10) each cycle successively undergoes water inlet, intermittent aerating, and (15min anoxia stirring/15min aeration stirs
Mix alternate run), 3 processes of sedimentation and drawing；Second sequencing batch reactor (17) each cycle successively undergoes water inlet, adds fermentation
4 liquid, anoxia stirring, sedimentation and drawing processes；
First sequencing batch reactor:
I, fill phase: water inlet sets inflow as the 1/2~2/3 of reactor effective volume, when passing through from raw water water tank water intake
Control switch control；
II, intermittent aerating stage: entering the intermittent aerating stage after water inlet, controls air compressor machine and second by process controller
Blender realizes 15min anoxia stirring/15min aeration stirring alternate run, and 30min is a circulation, a period 8~10
A circulation controls dissolved oxygen in 0.5mg/L~1mg/L by the 2nd pH, DO controller, and pH is in 6-8；
III, sedimentation and drawing stage: sedimentation and drawing sets 0.5~1h of sedimentation time, drains after mud-water separation, is discharged into intermediate water
Case, draining is than being 50%~80%.
Second sequencing batch reactor:
I, fill phase: setting inflow as the 1/2~4/5 of reactor effective volume, by the 4th peristaltic pump by intermediate water tank
Sewage be pumped into the second sequencing batch reactor；
II, add the fermentation liquid stage: long-pending into sludge fermentation liquid is the 1/50~1/10 of water inlet volume, in excess sludge fermentor
Fermenting mixture by centrifugation after by supernatant put into fermentation liquid hold-up tank in, system starting after, during water inlet, fermentation
Fermentation liquid in liquid hold-up tank enters the second sequencing batch reactor by the second peristaltic pump；
III, anoxia stirring stage: anoxia stirring sets mixing time as 1~2h；
IV, sedimentation and drawing stage: sedimentation and drawing sets 0.5~1h of sedimentation time, drains after mud-water separation, and draining is than being 50%
~75%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111470629A (en) * | 2020-04-17 | 2020-07-31 | 西安建筑科技大学 | Facultative active sludge sewage treatment method |
| CN113355227A (en) * | 2021-06-15 | 2021-09-07 | 青岛万慧源环保科技有限公司 | Automatic control device and control system based on multi-stage fermentation |
| CN113402026A (en) * | 2021-05-27 | 2021-09-17 | 广东富成环境科技有限公司 | Method for completely denitrifying wastewater with low carbon-nitrogen ratio |
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| CN113355227B (en) * | 2021-06-15 | 2022-12-30 | 青岛万慧源环保科技有限公司 | Automatic control device and control system based on multi-stage fermentation |
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