CN109354185A - A kind of combined denitrification method and device of sludge pyrohydrolysis anaerobic digestion biogas slurry - Google Patents
A kind of combined denitrification method and device of sludge pyrohydrolysis anaerobic digestion biogas slurry Download PDFInfo
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- CN109354185A CN109354185A CN201811417227.0A CN201811417227A CN109354185A CN 109354185 A CN109354185 A CN 109354185A CN 201811417227 A CN201811417227 A CN 201811417227A CN 109354185 A CN109354185 A CN 109354185A
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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
- 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
- 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
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- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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Abstract
The present invention relates to the combined denitrification method and device of a kind of sludge pyrohydrolysis anaerobic digestion biogas slurry, which is made of case of regulating and storing, nitrosation reactor, intermediate water storage case, anaerobic ammonia oxidation reactor；Sludge pyrohydrolysis anaerobic digestion biogas slurry enters case of regulating and storing and adjusts its pH, basicity value, subsequently into the partial nitrification for realizing pyrohydrolysis biogas slurry in nitrosation reactor, ammonia nitrogen in biogas slurry is oxidized to nitrite nitrogen by a certain percentage, while removing easily biodegradable organics；Intermediate water storage case is subsequently entered, the ratio of nitrite nitrogen and ammonia nitrogen, pH and basicity in biogas slurry are adjusted；The water outlet regulated is finally entered into anaerobic ammonia oxidation reactor, realizes the removal of nitrogen in biogas slurry.Compared with prior art, the present invention has many advantages, such as that ammonia nitrogen removal frank high effect is good while realizing the most of easily biodegradable organics of removal.
Description
Technical field
The present invention relates to a kind of methods of efficient process sludge pyrohydrolysis anaerobic digestion biogas slurry, more particularly, to a kind of sludge
The combined denitrification method and device of pyrohydrolysis anaerobic digestion biogas slurry.
Background technique
As human living standard is continuously improved, sewage treatment facility builds to obtain high speed development, and at the same time, sludge is made
For the by-product of Sewage Biological Treatment, yield is sharply increased.The hydrolysis effect of sludge can be improved in pyrohydrolysis anaerobic digestion techniques
And degradation effect of organic compound, increase biogas output；Kill germ in sludge；Shorten the residence time of anaerobic digestion, improves digester
Interior sludge concentration.Postdigestive sludge is set to be easy to be dehydrated simultaneously, sludge volume is reduced, thus in more and more Practical Projects
In be applied.
But ammonia nitrogen and organic matter disappear compared with common sludge anaerobism in the biogas slurry of sludge pyrohydrolysis anaerobic digestion techniques generation
To change liquid to significantly improve, processing difficulty further increases, currently, the biogas slurry main return to sewage treatment plant front end is handled,
The digestive juice of high ammonia nitrogen directly flow back will increase 15%~25% influent ammonia nitrogen loading, reduce the water outlet of municipal sewage plant
Therefore water quality is that sludge treatment plant develops sludge hot water in face of the processing of higher concentration ammonia nitrogen and the pyrohydrolysis digestive juice of COD
The problem of solving anaerobic digestion techniques processing sludge urgent need to resolve.
Pyrohydrolysis sludge-digestion liquid is the high ammonia-nitrogen wastewater of a kind of typical basicity and the dual shortage of organic carbon, using tradition
Nitration denitrification denitrogenation technology not only processing cost is high, and it is difficult to ensure that stable outlet effect, Anammox denitrogenation
Technology is to solve the problems, such as effective way of pyrohydrolysis sludge-digestion liquid, which is widely used to the denitrogenation processing of traditional biogas slurry,
But less about Research And Engineering application case of the technology in the processing of pyrohydrolysis digestive fluid denitrification, technical study concentrates on heat
The integral anaerobic ammoxidation denitrogenation research of biogas slurry is hydrolyzed, and reports general character outstanding, shows sludge pyrohydrolysis anaerobic digestion natural pond
Liquid is inhibited to function bacterium (AOB and Anammox bacterium), the starting time is long, operation stability is poor, nitrogen removal performance not
Foot, process operation control are complex, increase operational management difficulty to a certain extent.
The present invention is in view of the above-mentioned problems, propose that pyrohydrolysis biogas slurry first passes through partial nitrification and carries out the de- of Anammox again
Nitrogen technique assists allotment partial nitrification section to go out the composition of aquatic products using former biogas slurry, realize efficiently, high load capacity, low cost, compared with
The denitrogenation of the pyrohydrolysis biogas slurry of low control difficulty and the removal of COD.
Chinese patent 108585202A, which is disclosed, realizes part short distance nitration, sludge fermentation coupling in a kind of sequencing batch reactor
The technique for closing denitrification and Anammox processing sanitary sewage, including water tank inlet, part short distance nitration reactor (PN-
SBR), intermediate water tank, Anammox coupling sludge fermentation and denitrification reactor ASFD-SBR), out water tank.Part short distance
Part short distance nitration is carried out in nitrator (PN-SBR), is nitrite nitrogen by mineralized nitrogen a part of in raw water.Anaerobism ammonia
Oxidation coupling sludge fermentation converts influent ammonia nitrogen and nitrite nitrogen to anaerobic ammonia oxidizing bacteria in denitrification reactor FD-SBR)
The nitrate nitrogen of nitrogen and a small amount of nitrate nitrogen, generation is reduced to nitrogen by the carbon source that sludge fermentation generates, wherein fixed bed fillers are used
In withholding anaerobic ammonia oxidizing bacteria, denitrification occurs in floc sludge with sludge fermentation process.But the processing that the patent provides
The technique of sanitary sewage be only capable of processing low-concentration ammonia-nitrogen sanitary sewage, and in sludge pyrohydrolysis anaerobic digestion biogas slurry ammonia nitrogen it is dense
Degree is higher, which cannot handle the biogas slurry of sludge pyrohydrolysis anaerobic digestion techniques generation.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of sludge pyrohydrolysis to detest
Oxygen digests the combined denitrification method and device of biogas slurry, and specifically a kind of partial nitrification-denitrification-Anammox handles sludge
The combined denitrification method and device of pyrohydrolysis anaerobic digestion biogas slurry.
The purpose of the present invention can be achieved through the following technical solutions:
(1) pretreatment of sludge pyrohydrolysis anaerobic digestion biogas slurry
By the pH value adjustment of sludge pyrohydrolysis anaerobic digestion biogas slurry to 7.5-8.3, biogas slurry basicity is then adjusted to 4500-
6000mgCaCO3Settled sludge is discharged in/L, preformed precipitate 2-4h after water inlet, obtains reaction water inlet；
(2) nitrosation reaction-anti-nitration reaction
Reaction water inlet is added nitrosation reactor and carries out whole nitrosation reactions or partial nitrification reaction in step (1)
Obtain nitrosation reaction-anti-nitration reaction water outlet；
(3) PH of sludge pyrohydrolysis anaerobic digestion biogas slurry is adjusted to 7.2-8, Asia obtained in step (2) is then added
Nitration reaction-anti-nitration reaction water outlet adjusts the nitrosation reaction-anti-nitration reaction water outlet NO2 -- N and NH4 +- N ratio
Value is 1.25-1.33, and the sludge of deposition is discharged in preformed precipitate 2-4h after water inlet, obtains Anammox reaction water inlet；
(4) Anammox reacts
It is anti-that anaerobic ammonia oxidation reactor progress Anammox is added in the reaction water inlet of Anammox obtained in step (3)
It answers, completes the treatment process to the sludge pyrohydrolysis anaerobic digestion biogas slurry.
The pH value of biogas slurry uses NaHCO in the step (1)3It is adjusted with HCl；Biogas slurry basicity uses NaHCO3It adjusts.
Central Plains biogas slurry of the present invention first passes around the pretreatment section of partial nitrification, realizes going for most of easily biodegradable organics
It removes, using former biogas slurry auxiliary adjustment NO2 -- N and NH4 +N ratio, for subsequent Anammox section stable operation provide it is ideal into
Water
Nitrosation reactor uses SBR process operation, including reaction startup stage and stable reaction rank in the step (2)
Section, the operation method of the nitrosation reactor specifically:
(1) startup stage
It is inoculated with sludge used in partial nitrification reaction-anti-nitration reaction, it is dirty in reactor using SBR process operation
Mud concentration is 4-5mg/L, and in 7.5-8.3, temperature is 33-35 DEG C for pH control；Interim gradient increases reactor load, will intake
NH4 +The concentration of-N is promoted to 1800mg/L from 200~1000mL, controls dissolved oxygen DO by 0.8-1.5mg/L and is reduced to 0.3-
0.7mg/L, HRT 40h；
(2) stable operation stage
The draining ratio of nitrosation reactor is set as 50% in the stable operation stage, the NH of the reaction water inlet4 +- N is
1400-1800mg/L, COD 1800-2300mg/L；
The technological parameter of the whole nitrosation reaction are as follows: the signal period reaction time is 7-11h；The nitrosation is anti-
Answer-anti-nitration reaction water outlet in NH4 +- N concentration is 5-50mg/L, NO2 -- N concentration is 1200-1500mg/L, COD 697-
1339mg/L；
The technological parameter of partial nitrification reaction are as follows: reaction time includes anaerobism agitation phases, aeration stirring stage,
Wherein anaerobism stirs 3-8h, aeration stirring 5-8h；Aeration quantity is 0.88-2L air/minL reactor；The nitrosation is anti-
Answer-anti-nitration reaction water outlet in NH4 +- N concentration is 400-600mg/L, NO2 -- N concentration is 500-650mg/L, the nitrosation
NO in reaction-anti-nitration reaction water outlet2 -- N and NH4 +The ratio of-N is 1-1.5.
Anaerobic ammonia oxidation reactor described in step (4) is run using continuous flow process, including startup stage and stable fortune
Row order section, carrying out practically mode are as follows:
(1) startup stage
Start reactor by the way of stepping up anaerobic ammonia oxidation reactor load, by anaerobic ammonia oxidation reactor into
NH in water4 +- N is adjusted to 400-600mg/L, NO by 50mg/L step by step2 -- N is adjusted to 500-650mg/L by 66mg/L step by step,
COD is 905.17-1200mg/L；The HRT of anaerobic ammonia oxidation reactor increases to 29-40h by initial 9h；
(1) stable operation stage
PH value is 7-8.3 in the anaerobic ammonia oxidation reactor, and reaction temperature is 33-35 DEG C；The Anammox is anti-
Answer NH in device water outlet4 +- N is 0-10mg/L, NO2 -- N is 0-20mg/L, NO3 -- N is 20-70mg/L, COD 700-1000mg/
L；Nitrogen oxidation load is 0.71-1.31kgN/m3·d。
The nitrosation reactor starting time is 12-20 days, and HRT is 25-35 hours；Anaerobic ammonia oxidation reactor starting
Time is 40-60 days, and HRT is 29-36 hours.
The present invention also provides a kind of device of combined denitrification method using above-mentioned sludge pyrohydrolysis anaerobic digestion biogas slurry,
It regulates and stores case, nitrosation reactor, intermediate water storage case, anaerobic ammonia oxidation reactor including sequentially connected pyrohydrolysis biogas slurry, and
PH control system, dissolved oxygen control system and stirring system, the pyrohydrolysis biogas slurry regulate and store case by the first delivery pump and nitrous
The water inlet for changing reactor is connected with the water inlet of intermediate water storage case；The water outlet of the nitrosation reactor passes through the second conveying
Pump is connected with the water inlet of intermediate water storage case；The water outlet of intermediate water storage case passes through third delivery pump and anaerobic ammonia oxidation reactor
Water inlet be connected；
Regulate and store case, nitrosation reactor, intermediate water storage case, anaerobic ammonia oxidation reactor bottom of the pyrohydrolysis biogas slurry is equipped with
Sludge pipe；
The pH control system includes acid and alkali pumps, PH regulator storage tank, pH on-line determination instrument, pH controller；The hot water
Solution biogas slurry regulate and store case, nitrosation reactor, intermediate water storage case, pH probe is equipped in anaerobic ammonia oxidation reactor, the pH is visited
Head is connected with the controller in a signal way., the switch of the pH controller control acid and alkali pumps；PH regulator storage tank is adjusted equipped with acid
Agent or alkaline conditioner；Wherein, acid regulator HCl, alkaline conditioner NaHCO3。
The dissolved oxygen control system includes DO on-line determination instrument and DO control system；The lower part of the nitrosation reactor
Equipped with aeration head, air compressor machine is connected by air volume regulating valve with the aeration head；The DO on-line determination instrument is set to the nitrous
Change inside reactor, is connected with the DO control system, the DO control system controls the aperture of the regulating valve.
The pyrohydrolysis biogas slurry regulate and store case, nitrosation reactor, intermediate water storage case, be equipped in anaerobic ammonia oxidation reactor
Stirring system, the stirring system include blender and and agitating device.
PH probe is respectively arranged on the pyrohydrolysis biogas slurry and regulates and stores case, nitrosation reactor, intermediate water storage case, anaerobism ammonia
At the 1/2 of oxidation reactor height.
The DO on-line determination instrument is set at the 1/2 of the nitrosation reactor height.
Baffle plate is equipped in the anaerobic ammonia oxidation reactor, the water outlet of the anaerobic ammonia oxidation reactor is set to described
The upper end of anaerobic ammonia oxidation reactor settling zone.
Sludge pyrohydrolysis anaerobic digestion biogas slurry enters case progress water quality adjustment (including pH, basicity etc.) of regulating and storing in the present invention,
Enter the partial nitrification for realizing pyrohydrolysis biogas slurry in nitrosation reactor later, ammonia nitrogen in biogas slurry is oxidized to by a certain percentage
Nitrite nitrogen, while realizing the removal of easily biodegradable organics.It subsequently enters intermediate water storage case, adjusts nitrite nitrogen and ammonia nitrogen in biogas slurry
Ratio, pH and basicity.Finally, the water outlet regulated is entered anaerobic ammonia oxidation reactor, the removal of nitrogen in biogas slurry is realized.
Compare the process flow in Chinese patent 108585202A, it is found that the work in Chinese patent 108585202A
Skill process is primarily directed to the processing of the sanitary sewage of low-concentration ammonia-nitrogen, can not directly apply to the sludge of ammonia nitrogen in high density
The denitrogenation processing of pyrohydrolysis anaerobic digestion biogas slurry, therefore process object of the invention is different from the process object of the patent；This hair
There is also differences with the disclosure patent for bright technique Integral Thought, in Chinese patent 108585202A, denitrification and anaerobism ammonia
Oxidation process occurs in a same vessel, and anaerobic ammonia oxidizing bacteria need to be withheld using fixed bed fillers, nitrosation rank of the present invention
Duan Zuowei pretreatment section, main denitrification process occurs in Nitrification Stage, a small amount of to occur in Anammox section, and anaerobism ammonia
Oxygen bacterium is without adding filler withholding.Chinese patent 108585202A provides carbon source using sludge fermentation for denitrification, and of the invention
It is used using the carbon source that biogas slurry itself contains for denitrification, therefore origin of organic carbon needed for denitrification is also different.Specific anti-
During answering, the object that anti-nitration reaction is directed to is also different: Chinese patent 108585202A is mainly denitrification anaerobic ammoxidation
The nitrate nitrogen that process generates, the nitrite nitrogen that the main denitrification nitrosation process of the present invention generates, reduces subsequent Anammox section
Pressure, the nitrate nitrogen that part denitrification anaerobic ammoxidation section generates.Finally, the disclosure patent adjusts nitrosation reactor by HRT
The NO of water outlet2 -- N and NH4 +The ratio of-N, the present invention take that HRT is mainly adjusted and former biogas slurry auxiliary adjustment nitrosation reactor goes out
The NO of water2 -- N and NH4 +The ratio of-N.Denitrification process is placed in second segment by the disclosure patent, itself is held in sanitary sewage
Organic carbon does not efficiently use, and nitrosation reactor is only adjusted by HRT, is difficult to obtain relatively stable NO2 -- N and NH4 +-N
Ratio water outlet so that denitrification system nitrogen removal rate can not be guaranteed.Therefore, although the disclosure patent and of the invention
Process flow is similar in form, but from reaction raw materials, for reaction mechanism and reaction final effect, the present invention with the public affairs
The technology for opening patent has very big difference.
Compared with prior art, it is had the advantage that in the present invention
1) pretreatment section of the partial nitrification section as pyrohydrolysis biogas slurry makes full use of while partial nitrification is realized
Easily biodegradable organics denitrification in biogas slurry, while coupling aerobic process and COD is further removed, some toxic substance is able to be lived
Property sludge absorption, provides ideal water inlet for subsequent Anammox section, while alleviating the pressure of subsequent treatment process.
2) NO that the present invention passes through former biogas slurry auxiliary adjustment nitrosation reactor water outlet2 -- N and NH4 +The ratio of-N, so that
The anti-nitrite nitrogen of system inhibits the risk enhancing of anaerobic ammonia oxidizing bacteria, and nitrogen removal rate increases, and system operation is more stable.
3) compared with integral anaerobic ammoxidation denitrification process, this technique avoids inhibition of the pyrohydrolysis biogas slurry to function bacterium
Problem, easy to operate, system operation is more stable.
4) compared with traditional denitrification process, this technique carbon source additive amount reduces 100%, and aeration quantity reduces 40%, sludge quantity
90% is reduced, overall operation cost savings 84% can significantly reduce operating cost.
5) this method nitrogen removal rate is 94%-98.9%, and COD removal rate is 56%-65%.
Detailed description of the invention
Fig. 1 is schematic structural diagram of the device of the invention；
Fig. 2 is flow diagram of the invention；
In figure, 1 be pyrohydrolysis biogas slurry regulate and store case, 2 be nitrosation reactor, 3 be intermediate water storage case, 4 be Anammox
Reactor, 5 be pH controller, and 1.1 be former biogas slurry delivery pump, 1.2 be pyrohydrolysis biogas slurry regulate and store case water inlet pipe mouth, 1.3 be hot water
Solution biogas slurry regulate and store case blender, 1.4 be pyrohydrolysis biogas slurry regulate and store case pH on-line determination instrument, 1.5 be that pyrohydrolysis biogas slurry case of regulating and storing goes out
Hose nozzle, 1.6 for regulate and store case evacuated tube and sludge pipe, 1.7 are nitrosation reactor back with water inlet line, 1.8 are intermediate water storage case tune
Water-saving back with water inlet line；2.1 be the first delivery pump, 2.2 be nitrosation reactor water inlet pipe mouth, 2.4 be nitrosation reactor stir
Machine, 2.3 be pH nitrosation reactor on-line determination instrument, 2.5 be DO on-line determination instrument, 2.6 be nitrosation reactor effluent pipe mouth,
2.7 be DO control system, 2.8 be air compressor machine, 2.9 be air volume regulating valve, 2.10 be aeration head, 2.11 be nitrosation reactor row
Mud pipe；3.1 be the second delivery pump, 3.2 be intermediate water storage case water inlet pipe mouth, 3.3 be intermediate water storage case blender, 3.4 be centre
Water tank pH on-line determination instrument, 3.5 be intermediate water storage case evacuated tube and sludge pipe, 3.6 be intermediate water storage case effluent pipe mouth；4.1
For third delivery pump, 4.2 it is anaerobic ammonia oxidation reactor water inlet pipe mouth, 4.3 is N2Discharge outlet, 4.4 are reacted for Anammox
Mechanical stirrer, 4.5 be anaerobic ammonia oxidation reactor pH on-line determination instrument, 4.6 be that baffle plate, 4.7 anaerobic ammonia oxidation reactors go out
The mouth of a river；5.1 it is acid and alkali pumps, 5.2 is pH adjusting agent holding vessel.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
Embodiment 1
The structure such as Fig. 1 institute for the device that the combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry uses in the present embodiment
Show, including sequentially connected pyrohydrolysis biogas slurry regulate and store case 1, nitrosation reactor 2, intermediate water storage case 3, Anammox reaction
Device,
Pyrohydrolysis biogas slurry 1 top of case of regulating and storing is regulated and stored case water inlet pipe mouth 1.2 equipped with pyrohydrolysis biogas slurry, which regulates and stores
Case water inlet pipe mouth 1.2 is connected with former biogas slurry delivery pump 1.1, and the pyrohydrolysis biogas slurry use bracket of case blender 1.3 of regulating and storing is fixed on tune
Store box top, pH on-line determination instrument 1.4 is suspended vacantly at the 1/2 of case height of regulating and storing, bottom is equipped with evacuated tube and sludge pipe
1.6, it regulates and stores and is equipped with regulate and store case effluent pipe mouth 1.5, pyrohydrolysis biogas slurry of pyrohydrolysis biogas slurry at the 1/2 of case height and regulates and stores 1 case and pass through Asia
Nitrator back with water inlet line 1.7 provides former biogas slurry to nitrosation reactor 2, adjusts water back with water inlet line by intermediate water storage case
1.8 provide former biogas slurry to intermediate water storage case 3, which is equipped with the first delivery pump 2.1.
2 top of nitrosation reactor is equipped with nitrosation reactor water inlet pipe mouth 2.2, and blender 2.4 is fixed on using bracket
Regulate and store box top, pH on-line determination instrument 2.3 be suspended vacantly at the 1/2 of nitrosation reactor height, DO on-line determination instrument 2.5 it is outstanding
Sky is fixed at the 1/2 of nitrosation reactor height, aeration head 2.10 is fixed among nitrosation reactor bottom, the aeration head
2.10 for micro porous aeration head, bottom be equipped with sludge pipe 2.11, nitrosation reactor height 1/2 at go out equipped with nitrosation reactor
Hose nozzle 2.6, DO control system 2.7, air compressor machine 2.8, air volume regulating valve 2.9, the nitrosation reactor effluent pipe mouth 2.6 pass through
Second delivery pump 3.1 is connected with intermediate water storage case water inlet pipe mouth 3.2, and air compressor machine 2.8 passes through air volume regulating valve and aeration head 2.10
It is connected, DO on-line determination instrument is connected with DO control system, and DO control system controls to adjust the aperture of valve and then control nitrosation is anti-
Answer the DO value in device.
3 top of intermediate water storage case is equipped with intermediate water storage case water inlet pipe mouth 3.2, and intermediate water storage case blender 3.3 uses bracket
It is fixed on intermediate water storage box top, intermediate water storage case pH on-line determination instrument 3.4 is suspended vacantly the 1/2 of intermediate water storage case height
Place, bottom are equipped with evacuated tube and sludge pipe 3.5, intermediate water storage case effluent pipe mouth 3.6 are located at the 1/2 of 3 height of intermediate water storage case,
The intermediate water storage case effluent pipe mouth 3.6 is connected with anaerobic ammonia oxidation reactor water inlet pipe mouth 4.2 by third delivery pump 4.1.
4 upper end of anaerobic ammonia oxidation reactor is equipped with anaerobic ammonia oxidation reactor water inlet pipe mouth 4.2, top sets N2Discharge outlet
4.3 and anaerobic ammonia oxidation reactor blender 4.4, anaerobic ammonia oxidation reactor pH on-line determination instrument 4.5 be suspended vacantly in anaerobism
At the 1/2 of 4 height of ammonia oxidation reactor, baffle plate 4.6 shut off anaerobic ammonia oxidizing bacteria, water outlet by the way of bottom in and top out
4.7 are located at the upper end of reactor settling zone.
Package unit pH is all made of PLC control system 5 and is controlled, including acid and alkali pumps 5.1, pH adjusting agent holding vessel 5.2,
PH on-line determination instrument and pH controller；Wherein pH probe is connect with controller signals, and pH controller control acid and alkali pumps 5.1 are opened
It closes；PH regulator storage tank, which fills 5.2, NaHCO3Or HCl.
The experimental water that the present embodiment uses is derived from Changsha, Hunan sludge plant sludge pyrohydrolysis anaerobic digestion back plate
Frame pressing filtering liquid, water quality are as follows: NH4 +- N:1500-1800；COD:2000-2300；SS:100-400mg/L；Basicity: 2000-
6000mg/L；PH value 7.5-8.6.
In the present embodiment, the combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry specifically includes following steps, the party
The flow chart of method is as shown in Figure 2:
(1) pretreatment of sludge pyrohydrolysis anaerobic digestion biogas slurry
Pyrohydrolysis biogas slurry in the device former biogas slurry of 1 pair of case of regulating and storing pre-processes, using NaHCO3And HCl adjusts former biogas slurry
PH to 7.5-8.3, using NaHCO3Biogas slurry basicity is adjusted to 4500-6000mgCaCO3/ L, preformed precipitate 2-4h after water inlet, by adjusting
The sludge for storing case evacuated tube and the discharge deposition of sludge discharge pipeline 1.6, reduces the content of SS in biogas slurry, is nitrosation and Anammox
Section provides ideal water inlet, and water outlet is discharged from pyrohydrolysis biogas slurry case effluent pipe mouth 1.5 of regulating and storing, and passes through Asia according to subsequent technique demand
Nitrator back with water inlet line 1.7 or intermediate water storage case adjust water back with water inlet line 1.8 and regulate and store into nitrosation reactor 2 or centre
Case 3.
(2) nitrosation reaction-anti-nitration reaction
Reaction water inlet addition nitrosation reactor 2 carries out whole nitrosation reactions in step (1) or partial nitrification is anti-
Nitrosation reaction-anti-nitration reaction water outlet should be obtained, activated sludge used in nitrosation reactor 2 is derived from Shanghai City sanitary sewage
The returned sludge of factory, using SBR process operation, sludge concentration is 4-5mg/L in reactor, and pH is controlled in 7.5-8.3, and temperature is
33-35℃.Startup stage water inlet NH4 +- N is 200-1000mg/L, and interim gradient increases water inlet NH4 +- N concentration, HRT are
40h, initial start stage DO are 0.8-1.5mg/L, and the later period is reduced to 0.3-0.7mg/L, is controlled using PLC control system.
The reaction of biogas slurry whole nitrosation, water NH are carried out when the stable operation stage of nitrosation reactor 2 in reactor4 +-N
For 1400-1800mg/L, COD 1800-2300mg/L, ratio 50% is drained, the signal period reaction time is 7-11h, is discharged NH4 +- N concentration is 5-50mg/L, NO2 -- N concentration is 1200-1500mg/L, and ammonia nitrogen removal load is up to 1.52-2.32kg N/m3·
D is discharged COD in 697-1339mg/L, and COD removal rate is mainly gone by aerobic process and denitrification up to 35-55%
It removes.
(3) PH of sludge pyrohydrolysis anaerobic digestion biogas slurry is adjusted to 7.2-8, water water inlet pipe is adjusted by intermediate water storage case
Line 1.8 is regulated and stored case 3 into centre, mix with nitrosation reaction obtained in step (2)-anti-nitration reaction water outlet, adjusting nitrous
Change reaction-anti-nitration reaction water outlet NO2 -- N and NH4 +The ratio of-N is 1.25-1.33, preformed precipitate 2-4h after water inlet, and discharge is heavy
Long-pending sludge obtains Anammox reaction water inlet；The step reduces the content of SS in biogas slurry, reacts for subsequent Anammox
Device provides ideal water inlet.
(4) Anammox reacts
It is anti-that anaerobic ammonia oxidation reactor progress Anammox is added in the reaction water inlet of Anammox obtained in step (3)
Liquid is answered, which is run using continuous flow process, including startup stage and stable operation stage.PH is controlled
In 7-8.3, temperature is 33-35 DEG C, using dilution and gradually mentions and being started by the way of load, water inlet NH4 +- N and NO2 -- N points
Not by initial 50mg/L, 66mg/L, step up to 400-600mg/L, 500-650mg/L, influent COD 905.17-
1200mg/L, HRT increase to 29-40h by initial 9h.It is discharged NH4 +- N is 0-10mg/L, NO2 -- N is 0-20mg/L, nitrogen oxygen
Change load and (contains NH4 +- N and NO2 -- N) reach 0.71-1.31kgN/m3D, COD is further gone by denitrification in the reactor
It removes, NO3 -- N is further decreased, NO3 -- N is 20-70mg/L, COD 700-1000mg/L, and anaerobic ammonia oxidation reactor started
At rear maintenance stable operation.
Embodiment 2
The device that the combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry uses in the present embodiment and phase in embodiment 1
Together.
The experimental water that the present embodiment uses is derived from Changsha, Hunan sludge plant sludge pyrohydrolysis anaerobic digestion back plate
Frame pressing filtering liquid, water quality are as follows: NH4 +- N:1500；COD:2000；SS:100mg/L；Basicity: 2000mg/L；PH value 7.5.
The combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry specifically includes the following steps:
(1) pretreatment of sludge pyrohydrolysis anaerobic digestion biogas slurry
Pyrohydrolysis biogas slurry in the device former biogas slurry of 1 pair of case of regulating and storing pre-processes, using NaHCO3And HCl adjusts former biogas slurry
PH to 7.5, using NaHCO3Biogas slurry basicity is adjusted to 4500mgCaCO3/ L, preformed precipitate 4h after water inlet, by case evacuated tube of regulating and storing
And the sludge of the discharge deposition of sludge discharge pipeline 1.6, the content of SS in biogas slurry is reduced, provides ideal for nitrosation and Anammox section
Water inlet, water outlet from pyrohydrolysis biogas slurry regulate and store case effluent pipe mouth 1.5 be discharged, nitrosation reactor is passed through according to subsequent technique demand
Back with water inlet line 1.7 or intermediate water storage case adjust that water back with water inlet line 1.8 enters nitrosation reactor 2 or centre is regulated and stored case 3.
(2) nitrosation reaction-anti-nitration reaction
Reaction water inlet addition nitrosation reactor 2 carries out whole nitrosation reactions in step (1) or partial nitrification is anti-
Nitrosation reaction-anti-nitration reaction water outlet should be obtained, activated sludge used in nitrosation reactor 2 is derived from Shanghai City sanitary sewage
The returned sludge of factory, using SBR process operation, sludge concentration is 4mg/L in reactor, and 7.5, temperature is 33 DEG C for pH control.
Startup stage water inlet NH4 +- N is 200mg/L, and interim gradient increases water inlet NH4 +- N concentration, HRT 40h, initial start stage DO are
0.8mg/L, later period are reduced to 0.3mg/L, are controlled using PLC control system.
The reaction of biogas slurry whole nitrosation, water NH are carried out when the stable operation stage of nitrosation reactor 2 in reactor4 +-N
For 1400mg/L, COD 1800mg/L, ratio 50% is drained, the signal period reaction time is 7h, is discharged NH4 +- N concentration is 5mg/
L, NO2 -- N concentration is 1200mg/L, and ammonia nitrogen removal load is up to 1.52kg N/m3D, water outlet COD are removed in 697mg/L, COD
Rate is mainly removed by aerobic process and denitrification up to 35%.
(3) PH of sludge pyrohydrolysis anaerobic digestion biogas slurry is adjusted to 7.2-8, water water inlet pipe is adjusted by intermediate water storage case
Line 1.8 is regulated and stored case 3 into centre, mix with nitrosation reaction obtained in step (2)-anti-nitration reaction water outlet, adjusting nitrous
Change reaction-anti-nitration reaction water outlet NO2 -- N and NH4 +The ratio of-N is 1.25, and the dirt of deposition is discharged in preformed precipitate 2h after water inlet
Mud obtains Anammox reaction water inlet；The step reduces the content of SS in biogas slurry, provides for subsequent anaerobic ammonia oxidation reactor
Ideal water inlet.
(4) Anammox reacts
It is anti-that anaerobic ammonia oxidation reactor progress Anammox is added in the reaction water inlet of Anammox obtained in step (3)
Liquid is answered, which is run using continuous flow process, including startup stage and stable operation stage.PH is controlled
7, temperature is 33 DEG C, using dilution and gradually mentions and being started by the way of load, water inlet NH4 +- N and NO2 -- N is respectively by initial
50mg/L, 66mg/L, step up to 400mg/L, 500mg/L, influent COD 905.17mg/L, HRT are increased by initial 9h
Add to 29h.It is discharged NH4 +- N is 0mg/L, NO2 -- N is 0mg/L, and nitrogen oxidation load (contains NH4 +- N and NO2 -- N) reach 0.71kgN/
m3D, COD is further removed by denitrification in the reactor, NO3 -- N is further decreased, NO3 -- N is 20mg/L, and COD is
700mg/L maintains stable operation after anaerobic ammonia oxidation reactor start completion.
Embodiment 3
It the device that the combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry uses in the present embodiment and is filled in embodiment 1
It sets identical.
The experimental water that the present embodiment uses is derived from Changsha, Hunan sludge plant sludge pyrohydrolysis anaerobic digestion back plate
Frame pressing filtering liquid, water quality are as follows: NH4 +- N:1600；COD:2200；SS:200mg/L；Basicity: 3000mg/L；PH value 8.0.
The combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry specifically includes the following steps:
(1) pretreatment of sludge pyrohydrolysis anaerobic digestion biogas slurry
Pyrohydrolysis biogas slurry in the device former biogas slurry of 1 pair of case of regulating and storing pre-processes, using NaHCO3And HCl adjusts former biogas slurry
PH to 8, using NaHCO3Biogas slurry basicity is adjusted to 5500mgCaCO3/ L, preformed precipitate 3h after water inlet, by regulating and storing, case evacuated tube is simultaneous
The sludge of the discharge deposition of sludge discharge pipeline 1.6, reduces the content of SS in biogas slurry, provides preferably for nitrosation and Anammox section
Water inlet, water outlet from pyrohydrolysis biogas slurry regulate and store case effluent pipe mouth 1.5 be discharged, according to subsequent technique demand by nitrosation reactor into
Water pipeline 1.7 or intermediate water storage case adjust that water back with water inlet line 1.8 enters nitrosation reactor 2 or centre is regulated and stored case 3.
(2) nitrosation reaction-anti-nitration reaction
Reaction water inlet addition nitrosation reactor 2 carries out whole nitrosation reactions in step (1) or partial nitrification is anti-
Nitrosation reaction-anti-nitration reaction water outlet should be obtained, activated sludge used in nitrosation reactor 2 is derived from Shanghai City sanitary sewage
The returned sludge of factory, using SBR process operation, sludge concentration is 4.5mg/L in reactor, and 8, temperature is 34 DEG C for pH control.
Startup stage water inlet NH4 +- N is 500mg/L, and interim gradient increases water inlet NH4 +- N concentration, HRT 40h, initial start stage DO are
1.0mg/L, later period are reduced to 0.5mg/L, are controlled using PLC control system.
The reaction of biogas slurry whole nitrosation, water NH are carried out when the stable operation stage of nitrosation reactor 2 in reactor4 +-N
For 1600mg/L, COD 2000mg/L, ratio 50% is drained, the signal period reaction time is 9h, is discharged NH4 +- N concentration is 30mg/
L, NO2 -- N concentration is 1400mg/L, and ammonia nitrogen removal load is up to 2.00kg N/m3D, water outlet COD are gone in 1100mg/L, COD
Except rate is up to 45%, mainly removed by aerobic process and denitrification.
(3) PH of sludge pyrohydrolysis anaerobic digestion biogas slurry is adjusted to 7.6, water back with water inlet line is adjusted by intermediate water storage case
1.8 regulate and store case 3 into centres, mixs with nitrosation reaction obtained in step (2)-anti-nitration reaction water outlet, adjusting nitrosation
Reaction-anti-nitration reaction water outlet NO2 -- N and NH4 +The ratio of-N is 1.30, and the sludge of deposition is discharged in preformed precipitate 3h after water inlet,
Obtain Anammox reaction water inlet；The step reduces the content of SS in biogas slurry, provides reason for subsequent anaerobic ammonia oxidation reactor
Want into water.
(4) Anammox reacts
It is anti-that anaerobic ammonia oxidation reactor progress Anammox is added in the reaction water inlet of Anammox obtained in step (3)
Liquid is answered, which is run using continuous flow process, including startup stage and stable operation stage.PH is controlled
7.8, temperature is 34 DEG C, using dilution and gradually mentions and being started by the way of load, water inlet NH4 +- N and NO2 -- N is respectively by most
First 50mg/L, 66mg/L is stepped up to 500mg/L, 600mg/L, influent COD 1100mg/L, HRT and is increased by initial 9h
Add to 30h.It is discharged NH4 +- N is 5mg/L, NO2 -- N is 10mg/L, and nitrogen oxidation load (contains NH4 +- N and NO2 -- N) reach 1.00kgN/
m3D, COD is further removed by denitrification in the reactor, NO3 -- N is further decreased, NO3 -- N is 50mg/L, and COD is
800mg/L maintains stable operation after anaerobic ammonia oxidation reactor start completion.
Embodiment 3
The device that the combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry uses in the present embodiment and phase in embodiment 1
Together.
The experimental water that the present embodiment uses is derived from Changsha, Hunan sludge plant sludge pyrohydrolysis anaerobic digestion back plate
Frame pressing filtering liquid, water quality are as follows: NH4 +- N:1800；COD:2300；SS:400mg/L；Basicity: 6000mg/L；PH value 8.6.
The combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry specifically includes the following steps:
(1) pretreatment of sludge pyrohydrolysis anaerobic digestion biogas slurry
Pyrohydrolysis biogas slurry in the device former biogas slurry of 1 pair of case of regulating and storing pre-processes, using NaHCO3And HCl adjusts former biogas slurry
PH to 8.3, using NaHCO3Biogas slurry basicity is adjusted to 6000mgCaCO3/ L, preformed precipitate 2h after water inlet, by case evacuated tube of regulating and storing
And the sludge of the discharge deposition of sludge discharge pipeline 1.6, the content of SS in biogas slurry is reduced, provides ideal for nitrosation and Anammox section
Water inlet, water outlet from pyrohydrolysis biogas slurry regulate and store case effluent pipe mouth 1.5 be discharged, nitrosation reactor is passed through according to subsequent technique demand
Back with water inlet line 1.7 or intermediate water storage case adjust that water back with water inlet line 1.8 enters nitrosation reactor 2 or centre is regulated and stored case 3.
(2) nitrosation reaction-anti-nitration reaction
Reaction water inlet addition nitrosation reactor 2 carries out whole nitrosation reactions in step (1) or partial nitrification is anti-
Nitrosation reaction-anti-nitration reaction water outlet should be obtained, activated sludge used in nitrosation reactor 2 is derived from Shanghai City sanitary sewage
The returned sludge of factory, using SBR process operation, sludge concentration is 5mg/L in reactor, and 8.3, temperature is 35 DEG C for pH control.
Startup stage water inlet NH4 +- N is 1000mg/L, and interim gradient increases water inlet NH4 +- N concentration, HRT 40h, initial start stage DO
For 1.5mg/L, the later period is reduced to 0.7mg/L, is controlled using PLC control system.
The reaction of biogas slurry partial nitrification is carried out when the stable operation stage of nitrosation reactor 2 in reactor, first anaerobism is stirred
3h, then aeration stirring 5h are mixed, aeration phase DO is 0.3mg/, then denitrification-partial nitrification of biogas slurry can be achieved, DO is mainly adopted
It is controlled with continuous constant aerating amount, the flow of air volume regulating valve 2.9 is 0.88L air/minL reactor, nitrosation reactor
2 water outlet ammonia nitrogen concentration 400mg/L, water outlet nitrous nitrogen concentration are discharged NO in 500mg/L2 -- N and NH4 +The concentration proportion of-N is
1, COD removal rate is up to 35%.
(3) PH of sludge pyrohydrolysis anaerobic digestion biogas slurry is adjusted to 8, water back with water inlet line is adjusted by intermediate water storage case
1.8 regulate and store case 3 into centres, mixs with nitrosation reaction obtained in step (2)-anti-nitration reaction water outlet, adjusting nitrosation
Reaction-anti-nitration reaction water outlet NO2 -- N and NH4 +The ratio of-N is 1.33, and the sludge of deposition is discharged in preformed precipitate 4h after water inlet,
Obtain Anammox reaction water inlet；The step reduces the content of SS in biogas slurry, provides reason for subsequent anaerobic ammonia oxidation reactor
Want into water.
(4) Anammox reacts
It is anti-that anaerobic ammonia oxidation reactor progress Anammox is added in the reaction water inlet of Anammox obtained in step (3)
Liquid is answered, which is run using continuous flow process, including startup stage and stable operation stage.PH is controlled
8.3, temperature is 35 DEG C, using dilution and gradually mentions and being started by the way of load, water inlet NH4 +- N and NO2 -- N is respectively by most
First 50mg/L, 66mg/L is stepped up to 600mg/L, 650mg/L, influent COD 1200mg/L, HRT and is increased by initial 9h
Add to 40h.It is discharged NH4 +- N is 10mg/L, NO2 -- N is 20mg/L, and nitrogen oxidation load (contains NH4 +- N and NO2 -- N) reach 1.31kgN/
m3D, COD is further removed by denitrification in the reactor, NO3 -- N is further decreased, NO3 -- N is 70mg/L, and COD is
1000mg/L maintains stable operation after anaerobic ammonia oxidation reactor start completion.
Embodiment 4
The device that the combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry uses in the present embodiment and phase in embodiment 1
Together.
The experimental water that the present embodiment uses is derived from Changsha, Hunan sludge plant sludge pyrohydrolysis anaerobic digestion back plate
Frame pressing filtering liquid, water quality are as follows: NH4 +- N:1800；COD:2300；SS:400mg/L；Basicity: 6000mg/L；PH value 8.6.
The combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry specifically includes the following steps:
(1) pretreatment of sludge pyrohydrolysis anaerobic digestion biogas slurry
Pyrohydrolysis biogas slurry in the device former biogas slurry of 1 pair of case of regulating and storing pre-processes, using NaHCO3And HCl adjusts former biogas slurry
PH to 8.3, using NaHCO3Biogas slurry basicity is adjusted to 6000mgCaCO3/ L, preformed precipitate 2h after water inlet, by case evacuated tube of regulating and storing
And the sludge of the discharge deposition of sludge discharge pipeline 1.6, the content of SS in biogas slurry is reduced, provides ideal for nitrosation and Anammox section
Water inlet, water outlet from pyrohydrolysis biogas slurry regulate and store case effluent pipe mouth 1.5 be discharged, nitrosation reactor is passed through according to subsequent technique demand
Back with water inlet line 1.7 or intermediate water storage case adjust that water back with water inlet line 1.8 enters nitrosation reactor 2 or centre is regulated and stored case 3.
(2) nitrosation reaction-anti-nitration reaction
Reaction water inlet addition nitrosation reactor 2 carries out whole nitrosation reactions in step (1) or partial nitrification is anti-
Nitrosation reaction-anti-nitration reaction water outlet should be obtained, activated sludge used in nitrosation reactor 2 is derived from Shanghai City sanitary sewage
The returned sludge of factory, using SBR process operation, sludge concentration is 5mg/L in reactor, and 8.3, temperature is 35 DEG C for pH control.
Startup stage water inlet NH4 +- N is 1000mg/L, and interim gradient increases water inlet NH4 +- N concentration, HRT 40h, initial start stage DO
For 1.5mg/L, the later period is reduced to 0.7mg/L, is controlled using PLC control system.
The reaction of biogas slurry partial nitrification is carried out when the stable operation stage of nitrosation reactor 2 in reactor, first anaerobism is stirred
8h, then aeration stirring 8h are mixed, aeration phase DO is 0.8mg/, then denitrification-partial nitrification of biogas slurry can be achieved, DO is mainly adopted
It is controlled with continuous constant aerating amount, the flow of air volume regulating valve 2.9 is 2L air/minL reactor, nitrosation reactor 2
It is discharged ammonia nitrogen concentration 600mg/L, water outlet nitrous nitrogen concentration is discharged NO in 650mg/L2 -- N and NH4 +The concentration proportion of-N is 1.5
Fluctuation in range, COD removal rate is up to 55%.
(3) PH of sludge pyrohydrolysis anaerobic digestion biogas slurry is adjusted to 8, water back with water inlet line is adjusted by intermediate water storage case
1.8 regulate and store case 3 into centres, mixs with nitrosation reaction obtained in step (2)-anti-nitration reaction water outlet, adjusting nitrosation
Reaction-anti-nitration reaction water outlet NO2 -- N and NH4 +The ratio of-N is 1.33, and the sludge of deposition is discharged in preformed precipitate 4h after water inlet,
Obtain Anammox reaction water inlet；The step reduces the content of SS in biogas slurry, provides reason for subsequent anaerobic ammonia oxidation reactor
Want into water.
(4) Anammox reacts
It is anti-that anaerobic ammonia oxidation reactor progress Anammox is added in the reaction water inlet of Anammox obtained in step (3)
Liquid is answered, which is run using continuous flow process, including startup stage and stable operation stage.PH is controlled
8.3, temperature is 35 DEG C, using dilution and gradually mentions and being started by the way of load, water inlet NH4 +- N and NO2 -- N is respectively by most
First 50mg/L, 66mg/L is stepped up to 600mg/L, 650mg/L, influent COD 1200mg/L, HRT and is increased by initial 9h
Add to 40h.It is discharged NH4 +- N is 10mg/L, NO2 -- N is 20mg/L, and nitrogen oxidation load (contains NH4 +- N and NO2 -- N) reach 1.31kgN/
m3D, COD is further removed by denitrification in the reactor, NO3 -- N is further decreased, NO3 -- N is 70mg/L, and COD is
1000mg/L maintains stable operation after anaerobic ammonia oxidation reactor start completion.
Embodiment 5
The device that the combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry uses in the present embodiment and phase in embodiment 1
Together.
The experimental water that the present embodiment uses is derived from Changsha, Hunan sludge plant sludge pyrohydrolysis anaerobic digestion back plate
Frame pressing filtering liquid, water quality are as follows: NH4 +- N:1800；COD:2300；SS:400mg/L；Basicity: 6000mg/L；PH value 8.6.
The combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry specifically includes the following steps:
(1) pretreatment of sludge pyrohydrolysis anaerobic digestion biogas slurry
Pyrohydrolysis biogas slurry in the device former biogas slurry of 1 pair of case of regulating and storing pre-processes, using NaHCO3And HCl adjusts former biogas slurry
PH to 8.3, using NaHCO3Biogas slurry basicity is adjusted to 6000mgCaCO3/ L, preformed precipitate 2h after water inlet, by case evacuated tube of regulating and storing
And the sludge of the discharge deposition of sludge discharge pipeline 1.6, the content of SS in biogas slurry is reduced, provides ideal for nitrosation and Anammox section
Water inlet, water outlet from pyrohydrolysis biogas slurry regulate and store case effluent pipe mouth 1.5 be discharged, nitrosation reactor is passed through according to subsequent technique demand
Back with water inlet line 1.7 or intermediate water storage case adjust that water back with water inlet line 1.8 enters nitrosation reactor 2 or centre is regulated and stored case 3.
(2) nitrosation reaction-anti-nitration reaction
Reaction water inlet addition nitrosation reactor 2 carries out whole nitrosation reactions in step (1) or partial nitrification is anti-
Nitrosation reaction-anti-nitration reaction water outlet should be obtained, activated sludge used in nitrosation reactor 2 is derived from Shanghai City sanitary sewage
The returned sludge of factory, using SBR process operation, sludge concentration is 5mg/L in reactor, and 8.3, temperature is 35 DEG C for pH control.
Startup stage water inlet NH4 +- N is 1000mg/L, and interim gradient increases water inlet NH4 +- N concentration, HRT 40h, initial start stage DO
For 1.5mg/L, the later period is reduced to 0.7mg/L, is controlled using PLC control system.
The reaction of biogas slurry partial nitrification is carried out when the stable operation stage of nitrosation reactor 2 in reactor, first anaerobism is stirred
5h, then aeration stirring 7h are mixed, aeration phase DO is 0.6mg/, then denitrification-partial nitrification of biogas slurry can be achieved, DO is mainly adopted
It is controlled with continuous constant aerating amount, the flow of air volume regulating valve 2.9 is 1.1L air/minL reactor, nitrosation reactor 2
Water outlet ammonia nitrogen concentration 500mg/L, water outlet nitrous nitrogen concentration is discharged NO in 600mg/L2 -- N and NH4 +The concentration proportion of-N exists
Fluctuation in 1.2 ranges, COD removal rate is up to 40%.
(3) PH of sludge pyrohydrolysis anaerobic digestion biogas slurry is adjusted to 8, water back with water inlet line is adjusted by intermediate water storage case
1.8 regulate and store case 3 into centres, mixs with nitrosation reaction obtained in step 2-anti-nitration reaction water outlet, adjusting nitrosation is anti-
Answer-anti-nitration reaction water outlet NO2 -- N and NH4 +The ratio of-N is 1.33, and preformed precipitate 4h after water inlet is discharged the sludge of deposition, obtains
It reacts and intakes to Anammox；The step reduces the content of SS in biogas slurry, provides ideal for subsequent anaerobic ammonia oxidation reactor
Water inlet.
(4) Anammox reacts
It is anti-that anaerobic ammonia oxidation reactor progress Anammox is added in the reaction water inlet of Anammox obtained in step (3)
Liquid is answered, which is run using continuous flow process, including startup stage and stable operation stage.PH is controlled
8.3, temperature is 35 DEG C, using dilution and gradually mentions and being started by the way of load, water inlet NH4 +- N and NO2 -- N is respectively by most
First 50mg/L, 66mg/L is stepped up to 600mg/L, 650mg/L, influent COD 1200mg/L, HRT and is increased by initial 9h
Add to 40h.It is discharged NH4 +- N is 10mg/L, NO2 -- N is 20mg/L, and nitrogen oxidation load (contains NH4 +- N and NO2 -- N) reach 1.31kgN/
m3D, COD is further removed by denitrification in the reactor, NO3 -- N is further decreased, NO3 -- N is 70mg/L, and COD is
1000mg/L maintains stable operation after anaerobic ammonia oxidation reactor start completion.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (9)
1. a kind of combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry, which comprises the following steps:
(1) pretreatment of sludge pyrohydrolysis anaerobic digestion biogas slurry
By the pH value adjustment of sludge pyrohydrolysis anaerobic digestion biogas slurry to 7.5-8.3, biogas slurry basicity is then adjusted to 4500-
6000mgCaCO3Settled sludge is discharged in/L, preformed precipitate 2-4h after water inlet, obtains reaction water inlet；
(2) nitrosation reaction-anti-nitration reaction
The whole nitrosation reactions of nitrosation reactor progress are added in reaction water inlet in step (1) or partial nitrification reacts to obtain
Nitrosation reaction-anti-nitration reaction water outlet；
(3) PH of sludge pyrohydrolysis anaerobic digestion biogas slurry is adjusted to 7.2-8, nitrosation obtained in step (2) is then added
Reaction-anti-nitration reaction water outlet adjusts the nitrosation reaction-anti-nitration reaction water outlet NO2 -- N and NH4 +The ratio of-N is
1.19-1.30, preformed precipitate 2-4h after water inlet, is discharged the sludge of deposition, obtains Anammox reaction water inlet；
(4) Anammox reacts
The reaction water inlet of Anammox obtained in step (3) is added anaerobic ammonia oxidation reactor and carries out Anammox reaction,
Complete the treatment process to the sludge pyrohydrolysis anaerobic digestion biogas slurry.
2. a kind of combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry according to claim 1, which is characterized in that
The pH value of biogas slurry uses NaHCO in the step (1)3It is adjusted with HCl；Biogas slurry basicity uses NaHCO3It adjusts.
3. a kind of combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry according to claim 1, which is characterized in that
Nitrosation reactor uses SBR process operation in the step (2), including reacts startup stage and stablize the stage of reaction, the Asia
The operation method of nitrator specifically:
(1) startup stage
It is inoculated with sludge used in partial nitrification reaction-anti-nitration reaction, using SBR process operation, sludge is dense in reactor
Degree is 4-5mg/L, and in 7.5-8.3, temperature is 33-35 DEG C for pH control；Interim gradient increases reactor load, by NH of intaking4 +-
The concentration of N is promoted to 1800mg/L from 200~1000mL, controls dissolved oxygen by 0.8-1.5mg/L and is reduced to 0.3-0.7mg/L, HRT
For 40h；
(2) stable operation stage
The draining ratio of nitrosation reactor is set as 50% in the stable operation stage, the NH of the reaction water inlet4 +- N is 1400-
1800mg/L, COD 1800-2300mg/L；
The technological parameter of the whole nitrosation reaction are as follows: the signal period reaction time is 7-11h；The nitrosation reaction-is anti-
NH in nitration reaction water outlet4 +- N concentration is 5-50mg/L, NO2 -- N concentration is 1200-1500mg/L, COD 697-1339mg/
L；
The technological parameter of partial nitrification reaction are as follows: reaction time includes anaerobism agitation phases, aeration stirring stage, wherein
Anaerobism stirs 3-8h, aeration stirring 5-8h；Aeration quantity is 0.88-2L air/minL reactor；The nitrosation reaction-is anti-
NH in nitration reaction water outlet4 +- N concentration is 400-600mg/L, NO2 -- N concentration is 500-650mg/L, the nitrosation reaction-
NO in anti-nitration reaction water outlet2 -- N and NH4 +The ratio of-N is 1-1.5.
4. a kind of combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry according to claim 1, which is characterized in that
Anaerobic ammonia oxidation reactor described in step (4) is run using continuous flow process, including startup stage and stable operation stage, tool
Running body mode are as follows:
(1) startup stage
Start reactor by the way of stepping up anaerobic ammonia oxidation reactor load, anaerobic ammonia oxidation reactor intake
NH4 +- N is adjusted to 400-600mg/L, NO by 50mg/L step by step2 -- N is adjusted to 500-650mg/L by 66mg/L step by step, and COD is
905.17-1200mg/L；The HRT of anaerobic ammonia oxidation reactor increases to 29-40h by initial 9h；
(1) stable operation stage
PH value is 7-8.3 in the anaerobic ammonia oxidation reactor, and reaction temperature is 33-35 DEG C；The anaerobic ammonia oxidation reactor
NH in water outlet4 +- N is 0-10mg/L, NO2 -- N is 0-20mg/L, NO3 -- N is 20-70mg/L, COD 700-1000mg/L；Nitrogen
Oxidation load is 0.71-1.31kgN/m3·d。
5. a kind of combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry according to claim 1, which is characterized in that
The nitrosation reactor starting time is 12-20 days, and HRT is 25-35 hours；Anaerobic ammonia oxidation reactor starting the time be
40-60 days, HRT was 29-36 hours.
6. a kind of device for the combined denitrification method for applying sludge pyrohydrolysis anaerobic digestion biogas slurry as described in claim 1,
It is characterized in that, including sequentially connected pyrohydrolysis biogas slurry is regulated and stored case (1), nitrosation reactor (2), intermediate water storage case (3), anaerobism
Ammonia oxidation reactor (4) and pH control system, dissolved oxygen control system and stirring system, the pyrohydrolysis biogas slurry are regulated and stored case
(1) it is connected by the first delivery pump (2.1) with the water inlet of the water inlet of nitrosation reactor (2) and intermediate water storage case (3)；Institute
The water outlet for stating nitrosation reactor (2) is connected by the second delivery pump (3.1) with the water inlet of intermediate water storage case (3)；It is intermediate
The water outlet of water tank (3) is connected by third delivery pump (4.1) with the water inlet of anaerobic ammonia oxidation reactor (4)；
The pyrohydrolysis biogas slurry is regulated and stored case (1), nitrosation reactor (2), intermediate water storage case (3), anaerobic ammonia oxidation reactor (4)
Bottom is equipped with sludge pipe；
The pH control system includes acid and alkali pumps (5.1), PH regulator storage tank (5.2), pH on-line determination instrument, pH controller；Institute
Regulate and store case (1), nitrosation reactor (2), intermediate water storage case (3), anaerobic ammonia oxidation reactor of pyrohydrolysis biogas slurry is stated to be all provided in (4)
There is pH probe, the pH probe is connected with the controller in a signal way., the switch of pH controller control acid and alkali pumps (5.1)；PH
Regulator storage tank (5.2) is equipped with acid regulator or alkaline conditioner；
The dissolved oxygen control system includes DO on-line determination instrument (2.5) and DO control system (2.7)；The nitrosation reactor
(2) lower part is equipped with aeration head (2.10), and air compressor machine (2.8) passes through air volume regulating valve (2.9) and the aeration head (2.10) phase
Even；The DO on-line determination instrument (2.5) is set to the nitrosation reactor (2) inside, with DO control system (2.7) phase
Even, the DO control system (2.7) controls the aperture of the regulating valve (2.9).
The pyrohydrolysis biogas slurry is regulated and stored case (1), nitrosation reactor (2), intermediate water storage case (3), anaerobic ammonia oxidation reactor (4)
It is inside equipped with stirring system, the stirring system includes blender and and agitating device.
7. the device of the combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry according to claim 6, feature exist
In, pH probe be respectively arranged on the pyrohydrolysis biogas slurry regulate and store case (1), nitrosation reactor (2), intermediate water storage case (3), detest
At the 1/2 of anaerobic ammonium oxidation reactor (4) height.
8. the device of the combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry according to claim 6, feature exist
In the DO on-line determination instrument is set at the 1/2 of the nitrosation reactor (2) height.
9. the device of the combined denitrification method of sludge pyrohydrolysis anaerobic digestion biogas slurry according to claim 6, feature exist
In equipped with baffle plate (4.6), the water outlet of the anaerobic ammonia oxidation reactor (4) in the anaerobic ammonia oxidation reactor (4)
(4.7) it is set to the upper end of the anaerobic ammonia oxidation reactor (4) settling zone.
Priority Applications (1)
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| CN111410311A (en) * | 2020-03-26 | 2020-07-14 | 同济大学 | Efficient denitrification method for coupling membrane filtration and anaerobic ammonia oxidation process |
| CN112979075A (en) * | 2021-02-26 | 2021-06-18 | 天津凯英科技发展股份有限公司 | Zero-carbon-source-added biogas slurry denitrification method and application thereof |
| CN114133034A (en) * | 2021-11-17 | 2022-03-04 | 同济大学 | Two-stage anaerobic ammonia oxidation process based on polyurethane curing AOB |
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