CN108862581A - A kind of device and method that AO biomembrane+sludge fermentation coupling denitrification realizes sewage deep denitrogenation synchronous sludge decrement - Google Patents
A kind of device and method that AO biomembrane+sludge fermentation coupling denitrification realizes sewage deep denitrogenation synchronous sludge decrement Download PDFInfo
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- CN108862581A CN108862581A CN201810721933.8A CN201810721933A CN108862581A CN 108862581 A CN108862581 A CN 108862581A CN 201810721933 A CN201810721933 A CN 201810721933A CN 108862581 A CN108862581 A CN 108862581A
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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
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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Abstract
A kind of device and method that AO biomembrane+sludge fermentation coupling denitrification realizes sewage deep denitrogenation synchronous sludge decrement, belong to technical field of biological sewage treatment, which mainly includes former pond, AO biofilm reactor, intermediate water tank, storage basin, sludge fermentation coupling denitrification reactor；Sewage carries out part denitrification with the anoxic zone that the nitrification liquid of reflux enters AO biofilm reactor and Anammox reacts denitrogenation；Mixed liquor continues to flow into aerobic zone and nitration reaction occurs, and water outlet enters intermediate water tank, and a part is back to anoxic zone front end, and another part enters back into sludge fermentation coupling denitrification reactor；The excess sludge of the municipal sewage plant stored in storage basin enters sludge fermentation coupling denitrification reactor, and sludge fermentation occurs and realizes mud decrement, and carries out denitrification advanced nitrogen using the energy that sludge fermentation generates.The present invention saves energy energy consumption, is suitable for low C/N ratio, high nitrogen load sewage deep denitrogenation.
Description
Technical field
The present invention relates to a kind of AO biomembrane+sludge fermentation coupling denitrifications to realize sewage deep denitrogenation synchronous sludge decrement
Device and method, belong to technical field of biological sewage treatment.Sewage realizes denitrification+anaerobism ammonia in AO biofilm reactor
Oxidation reaction denitrogenation, water outlet nitrification liquid enter the further advanced nitrogen of sludge fermentation coupling denitrification reactor, and sewage total nitrogen is real
Now efficiently removal, while sludge fermentation realizes that sludge reduction, the energy for generation of fermenting are utilized, the NH4 of generation+It is gone
It removes, achieves many things at one stroke.This technology is suitable for advanced treating of the low C/N than, high nitrogen load sewage.
Background technique
The city domestic sewage processing in China is faced with many challenges, and wherein the removal of total nitrogen and the processing of excess sludge are outstanding
For sternness.Water eutrophication is got worse, and country is also reinforcing nitrogen discharged control, is promulgated within 2002《At town sewage
Manage factory's pollutant emission standard》It (GB18918-2002) is that ammonia nitrogen is less than 5mg/L to the level-one A standard of nitrogen in, total nitrogen is less than
15mg/L.Currently, external source denitrification is still the main path of denitrogenation, but city domestic sewage universal C/N in China's is low, Wu Fati
For the sufficient source C, denitrification effect is seriously constrained.Many sewage treatment plants can only the outer source C is intensified anti-nitrated to be reached by adding
It to the discharge standard of nitrogen, does so not only at high cost, but also more excess sludges can be generated.The processing of excess sludge is also one
Hang-up, municipal sewage plant typical for one, Treatment of Sludge cost account for about the 40% of totle drilling cost.In order to solve this
A little problems, research and development economy, efficient Sewage Biological Treatment denitrogenation new process become key.
Biofilm is to make microorganism in filler surface growing multiplication by adding filler, form activated sludge biological film
Come the bioremediation of nutriment in sewage of degrading.Compared with activated sludge process, its convenient for management, excess sludge production is very
It is low.And biofilm is conducive to the anaerobic ammonia oxidizing bacteria, nitrobacteria growth that the generation cycle is long, value-added speed is slower, facilitates
The realization of the strengthened denitrifications approach such as Anammox, synchronous nitration and denitrification.
Sludge fermentation is the conventional means of processing excess sludge, but can releasing organics and ammonia while realizing minimizing
Nitrogen etc. causes secondary pollution.Sludge fermentation and denitrification are coupled in a reactor, can use the organic of fermentation generation
Object carries out denitrification denitrogenation as carbon source, and the ammonia nitrogen for generation of fermenting can also pass through together with the nitrous generated in denitrification process
Anammox removal, does not influence effluent quality.
Summary of the invention
The present invention is organic by novel process such as biomembrane, denitrification coupling Anammox, sludge fermentation coupling denitrifications
In conjunction with AO biofilm reactor is low compared to traditional activated sludge process excess sludge production, and there are Anammoxs for anoxic zone
Reaction is so that nitric efficiency is higher.AO reactor is discharged the nitrate nitrogen source that can be used as sludge fermentation coupling denitrification reactor,
Anti-nitration reaction occurs and continues denitrogenation, while being capable of handling external excess sludge, is a kind of economical and efficient, the place to achieve many things at one stroke
Reason method.
To achieve the above object, the present invention provides a kind of AO biomembrane+sludge fermentation coupling denitrification realization sewage deep
The device of denitrogenation synchronous sludge decrement, it is characterised in that：Including raw water water tank (1), AO biofilm reactor (2), raw water water inlet
Pump (2.1), agitating device I (2.2), floating stuffing I (2.3), floating stuffing II (2.4), nitrification liquid reflux pump (2.5), aeration
Head (2.6), air compressor (2.7), gas flowmeter (2.8), intermediate water tank (3), storage basin (4), sludge fermentation coupling are anti-
Nitrator (5), nitrification liquid intake pump (5.1), into dredge pump (5.2), agitating device II (5.3), temperature control heating rod (5.4),
On-line temperature monitoring controller (5.5), drain valve (5.6), mud valve (5.7)；
Raw water water tank (1) is connected by raw water intake pump (2.1) with AO biofilm reactor (2), and sewage is followed by AO
The anoxic zone and aerobic zone of biofilm reactor (2), water outlet enter intermediate water tank (3), and a part passes through nitrification liquid reflux pump
(2.5) it is back to anoxic zone front end, another part enters sludge fermentation coupling denitrification reactor (5), while entering also
The excess sludge of the municipal sewage plant stored in storage basin (4), the two carry out sludge fermentation after mixing and couple anti-nitre
Change, Anammox reaction, realizes mud decrement and advanced nitrogen.
Using the method for the device, which is characterized in that include the following steps：
(1) start AO biofilm reactor：AO biofilm reactor includes anoxic zone and the part of aerobic zone two, volume ratio
It is 1:2, wherein anoxic zone adds the floating stuffing I of gathering denitrifying bacterium and anaerobic ammonia oxidizing bacteria, and aerobic zone adds enrichment nitrification
The floating stuffing II of bacterium, filler are all made of the polypropylene hollow ring that diameter is 25~50mm, and density is 0.98%~1.00g/
cm3, porosity is 94%~96%, and filling rate is 30%~40%, injects sewage, and adjustment total hrt is 6h,
Stirring system and aerating system are opened, the dissolved oxygen DO for controlling aerobic zone is 2~4mg/L.Sewage and the nitrification liquid of reflux are lacking
Oxygen area carries out denitrification denitrogenation, and the part nitrous generated in the process is suspended fixation on filler I together with the ammonia nitrogen in raw water
Anaerobic ammonia oxidizing bacteria utilizes, and Anammox occurs and reacts further denitrogenation；Mixed liquor continues to flow into aerobic zone and nitrification occurs instead
It answers, is nitrate nitrogen by mineralized nitrogen, water outlet a part is back to anoxic zone front end, mixed liquid recycle ratio 300%；
(2) start sludge fermentation coupling denitrification reactor：It is 3000~4000mg/ that sludge concentration is added into reactor
Sodium acetate, sodium nitrate mixed liquor of denitrification sludge and the C/N ratio of L for 2~3, anoxia stirring are controlled with temperature control heating rod and are reacted
Device temperature is 30 DEG C, until nitrous accumulation rate reaches 80% or more in reactor；The dosage of sodium acetate is gradually decreased, and is added
The excess sludge of municipal sewage plant, until the source C that generates of excess sludge fermentation can substituted acetic acid sodium completely, then gradually use
The water outlet of AO biofilm reactor replaces sodium nitrate, so that the nitrous accumulation rate of reactor is remained at 80% or more, realizes dirt
Mud fermentation coupling denitrification；Anaerobic ammonium oxidation sludge is finally added into reactor, so that sludge concentration is 5000 in reactor
~6000mg/L realizes sludge fermentation coupling denitrification, Anammox, solves sludge fermentation generation ammonia nitrogen and causes secondary pollution
The problem of；
(3) series operation AO biofilm reactor and sludge fermentation coupling denitrification reactor：When AO biofilm reactor
It is discharged NH4 +3.0mg/L when being down to is hereinafter, when sludge fermentation coupling denitrification reactor nitrogen removal rate is up to 90% or more, series connection
Two reactors are run, AO biofilm reactor is maintained the reflux for than 300%, total hrt 6h, aerobic zone dissolved oxygen DO
For 2~4mg/L, water outlet is stored in intermediate water tank；The period is arranged such as using self-con-tained unit in sludge fermentation coupling denitrification reactor
Under：1. starting into mud into dredge pump, the excess sludge of the municipal sewage plant stored in storage basin is squeezed into sludge fermentation coupling
Denitrification reactor, set plus mud volume be the 1/5~2/5 of reactor dischargeable capacity, into the mud time be 15min；2. intaking, open
The AO biofilm reactor water outlet of intermediate water tank storage is pumped into reactor by dynamic nitrification liquid intake pump, and it is anti-for setting water inlet volume
Answer the 4/5~3/5 of device dischargeable capacity, flooding time 15min；3. anoxia stirring, starts agitating device II, revolving speed is controlled 80
~100rpm, anoxia stirring 5h are 30 DEG C with temperature control heating rod control temperature of reactor；4. precipitating 2h；5. draining, displacement of volume
It is the 2/5~3/5 of reactor effective volume, water discharge time 15min；6. spoil disposal, spoil disposal ratio is 1/2, spoil disposal duration 15min；It is whole
A period is 8h.
A kind of AO biomembrane provided by the invention+sludge fermentation coupling denitrification realizes that sewage deep denitrogenation synchronous sludge subtracts
The device and method of amount have the advantages that following 4：
(1) it is suitble to the low C/N ratio of processing, high nitrogen load sewage；
(2) technology of denitrification coupling Anammox and two advanced nitrogens of coupling denitrification that ferment, denitrogenation are combined
It is high-efficient, and save very much carbon source；
(3) excess sludge is nearly free from using biomembrane itself, is capable of handling the excess sludge of external sewage treatment plant,
Realize sludge reduction；
(4) operation is simple, facilitates management.
Detailed description of the invention
Fig. 1 is the device of the invention figure.
In Fig. 1：1-raw water water tank, 2-A/O biofilm reactors, 2.1-raw water intake pumps, 2.2-agitating devices I,
2.3-floating stuffings I, 2.4-floating stuffings II, 2.5-nitrification liquid reflux pumps, 2.6- aeration head, 2.7- air compressor,
2.8- gas flowmeter, 3-intermediate water tanks, 4-storage basins, 5-sludge fermentation coupling denitrification reactors, 5.1- nitrification liquid into
Water pump, 5.2-into dredge pump, 5.3-agitating devices II, 5.4-temperature control heating rods, 5.5-on-line temperature monitoring controllers,
5.6-drain valves, 5.7-mud valves.
Specific embodiment
In conjunction with Fig. 1, the embodiment that the present invention will be described in detail.AO reactor (2) total volume 50L used, total effective volume
For 35L, it is equipped with 8 lattice altogether, wherein preceding 4 lattice are anoxic zone, places the floating stuffing of enrichment anaerobic ammonia oxidizing bacteria and denitrifying bacterium
Ⅰ；4 lattice are aerobic zone afterwards, place the floating stuffing II of enrichment nitrifier, packing ratio is 45%；Sludge fermentation coupling used is anti-
Nitrator (5) dischargeable capacity 10L, each period 8h precipitate 2h wherein stirring 5h, and water inlet is into mud, draining, spoil disposal
0.25h。
For experimental water using Beijing University of Technology dependents' district sanitary sewage as raw water, specific water quality is as follows：COD concentration is
180~300mg/L, NH4 +Concentration is 50~85mg/L, NO2 -- N and NO3- N detection limit hereinafter, COD/N ratio be 2.2~
3.5, belong to typical low COD/N and compares sewage.
The nitrification liquid of sanitary sewage and reflux in raw water water tank (1) passes through raw water intake pump (2.1) and nitrification respectively
The anoxic zone that liquid reflux pump (2.5) enters A/O biofilm reactor (2) carries out anti-nitration reaction denitrogenation and removes organic matter, mistake
The nitrous generated in journey is suspended anaerobic ammonia oxidizing bacteria fixed on filler I (2.3) together with the ammonia nitrogen in raw water and utilizes, and occurs
Anammox reaction, further denitrogenation；Mixed liquor continues to flow into aerobic zone and nitration reaction occurs, and water outlet enters intermediate water
Case, a part are back to anoxic zone front end；The total hrt of AO reactor is 6h, and anoxic zone hydraulic detention time is
2h, aerobic zone hydraulic detention time are 4h, and mixed liquid recycle ratio 300%, aerobic zone dissolved oxygen concentration is 2~3mg/L；
Nitrification liquid in intermediate water tank (3) is reacted by nitrification liquid intake pump (5.1) into sludge fermentation coupling denitrification
Device (5), the excess sludge of the middle municipal sewage plant stored of storage basin (4) is by entering sludge fermentation coupling into dredge pump (5.2)
It closes denitrification reactor (5), sludge fermentation occurs and realizes mud decrement, and carries out denitrification using the energy that sludge fermentation generates
Advanced nitrogen, meanwhile, the NH that sludge fermentation generates4 +It is reacted and is removed by Anammox.
Than sanitary sewage, the pH value of final outflow water is AO biomembrane+low C/N of sludge fermentation coupling denitrification device processing
7.2~7.6,1.0~3.0mg/L of ammonia nitrogen concentration, total nitrogen concentration 10~20mg/L, COD40~60mg/L stably reach country
Level-one A standard.
Claims (2)
1. a kind of AO biomembrane+sludge fermentation coupling denitrification realizes the device of sewage deep denitrogenation synchronous sludge decrement, special
Sign is：Including raw water water tank (1), AO biofilm reactor (2), raw water intake pump (2.1), agitating device I (2.2), suspend
Filler I (2.3), floating stuffing II (2.4), nitrification liquid reflux pump (2.5), aeration head (2.6), air compressor (2.7), gas
Flowmeter (2.8), intermediate water tank (3), storage basin (4), sludge fermentation coupling denitrification reactor (5), nitrification liquid intake pump
(5.1), into dredge pump (5.2), agitating device II (5.3), temperature control heating rod (5.4), on-line temperature monitoring controller (5.5), row
Water valve (5.6) and mud valve (5.7)；
Raw water water tank (1) is connected by raw water intake pump (2.1) with AO biofilm reactor (2), and sewage is followed by AO biology
The anoxic zone and aerobic zone of membrane reactor (2), water outlet enter intermediate water tank (3), and a part is returned by nitrification liquid reflux pump (2.5)
It is flow to anoxic zone front end, another part enters sludge fermentation coupling denitrification reactor (5), while the also storage basin entered
(4) excess sludge of the municipal sewage plant stored in.
2. the method for application device as described in claim 1, which is characterized in that include the following steps：
(1) start AO biofilm reactor：AO biofilm reactor includes anoxic zone and the part of aerobic zone two, volume ratio 1:
2, wherein anoxic zone adds the floating stuffing I of gathering denitrifying bacterium and anaerobic ammonia oxidizing bacteria, and aerobic zone adds enrichment nitrifier
Floating stuffing II, filler are all made of the polypropylene hollow ring that diameter is 25~50mm, and density is 0.98%~1.00g/cm3, hole
Gap rate is 94%~96%, and filling rate is 30%~40%, injects sewage, and adjustment total hrt is 6h, and unlatching is stirred
System and aerating system are mixed, the dissolved oxygen DO for controlling aerobic zone is 2~4mg/L；Sewage and the nitrification liquid of reflux anoxic zone into
Row denitrification denitrogenation, the part nitrous generated in the process are suspended anaerobism ammonia fixed on filler I together with the ammonia nitrogen in raw water
Oxidation bacteria utilizes, and Anammox occurs and reacts further denitrogenation；Mixed liquor continues to flow into aerobic zone and nitration reaction occurs, by ammonia
Nitrogen is converted into nitrate nitrogen, and water outlet a part is back to anoxic zone front end, mixed liquid recycle ratio 300%；
(2) start sludge fermentation coupling denitrification reactor：It is 3000~4000mg/L's that sludge concentration is added into reactor
Sodium acetate, the sodium nitrate mixed liquor of denitrification sludge and C/N ratio for 2~3, anoxia stirring control reactor with temperature control heating rod
Temperature is 30 DEG C, until nitrous accumulation rate reaches 80% or more in reactor；The dosage of sodium acetate is gradually decreased, and adds city
The excess sludge of sewage treatment plant of city, until the source C that generates of excess sludge fermentation can substituted acetic acid sodium completely, then gradually use AO
The water outlet of biofilm reactor replaces sodium nitrate, so that the nitrous accumulation rate of reactor is remained at 80% or more, realizes sludge
Ferment coupling denitrification；Anaerobic ammonium oxidation sludge is finally added into reactor so that in reactor sludge concentration be 5000~
6000mg/L realizes sludge fermentation coupling denitrification, Anammox, solves sludge fermentation generation ammonia nitrogen and causes secondary pollution
Problem；
(3) series operation AO biofilm reactor and sludge fermentation coupling denitrification reactor：When AO biofilm reactor is discharged
NH4 +3.0mg/L when being down to is hereinafter, when sludge fermentation coupling denitrification reactor nitrogen removal rate is up to 90% or more, series operation
Two reactors, AO biofilm reactor are maintained the reflux for than 300%, total hrt 6h, aerobic zone dissolved oxygen DO be 2~
4mg/L, water outlet are stored in intermediate water tank；Sludge fermentation coupling denitrification reactor is as follows using the self-con-tained unit setting period：①
Into mud, starts into dredge pump, the excess sludge of the municipal sewage plant stored in storage basin is squeezed into sludge fermentation and couples anti-nitre
Change reactor, set plus mud volume is the 1/5~2/5 of reactor dischargeable capacity, is 15min into the mud time；2. intaking, start nitre
Change liquid intake pump, the AO biofilm reactor water outlet of intermediate water tank storage is pumped into reactor, sets water inlet volume as reactor
The 4/5~3/5 of dischargeable capacity, flooding time 15min；3. anoxia stirring, starts agitating device II, revolving speed control 80~
100rpm, anoxia stirring 5h are 30 DEG C with temperature control heating rod control temperature of reactor；4. precipitating 2h；5. draining, displacement of volume is
The 2/5~3/5 of reactor effective volume, water discharge time 15min；6. spoil disposal, spoil disposal ratio is 1/2, spoil disposal duration 15min；Entirely
Period is 8h.
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Cited By (5)
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| CN111908735A (en) * | 2020-08-28 | 2020-11-10 | 桂林理工大学 | AAO process transformation method for urban sewage treatment plant based on anaerobic ammonia oxidation |
| CN111908606A (en) * | 2020-08-28 | 2020-11-10 | 桂林理工大学 | Method for treating domestic sewage by anaerobic ammonia oxidation-A/O coupling |
| CN112811715A (en) * | 2020-12-28 | 2021-05-18 | 吉林农业大学 | Sewage treatment system utilizing primary sludge fermentation |
| 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 |
| CN114988643A (en) * | 2022-06-17 | 2022-09-02 | 北京恩菲环保技术有限公司 | Method for enriching anaerobic ammonium oxidation bacteria |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111908735A (en) * | 2020-08-28 | 2020-11-10 | 桂林理工大学 | AAO process transformation method for urban sewage treatment plant based on anaerobic ammonia oxidation |
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| CN112811715A (en) * | 2020-12-28 | 2021-05-18 | 吉林农业大学 | Sewage treatment system utilizing primary sludge fermentation |
| 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 |
| CN114988643A (en) * | 2022-06-17 | 2022-09-02 | 北京恩菲环保技术有限公司 | Method for enriching anaerobic ammonium oxidation bacteria |
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