CN107445297A - A kind of startup method for handling pig farm biogas slurry SNAD techniques - Google Patents

A kind of startup method for handling pig farm biogas slurry SNAD techniques Download PDF

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CN107445297A
CN107445297A CN201710709148.6A CN201710709148A CN107445297A CN 107445297 A CN107445297 A CN 107445297A CN 201710709148 A CN201710709148 A CN 201710709148A CN 107445297 A CN107445297 A CN 107445297A
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biogas slurry
pig farm
snad
farm biogas
techniques
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信欣
鲁航
王子凌
管蕾
言宗骋
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Chengdu University of Information Technology
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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
    • C02F3/006—Regulation methods for biological treatment
    • 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
    • C02F3/301—Aerobic and anaerobic treatment in the same reactor
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2

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  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
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  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The present invention relates to a kind of startup method for handling pig farm biogas slurry SNAD techniques, comprise the steps：(1) Round Sump continuous stream reaction unit is built；(2) sludge organism embrane method composite integrated denitrification process is built：Addition seed sludge in Round Sump continuous stream reaction unit into step (1), while add PVC polyester filler；(3) start：Dissolved oxygen DO is controlled in 0.2 0.6mgL‑1, hydraulic detention time control is in 0.6 1.5d, and temperature is at 26 32 DEG C, and pig farm biogas slurry inlet flow-patterm is 7.5 8.2, and pig farm biogas slurry influent ammonium concentration is in 245mgL1‑455mg·L‑1, start SNAD techniques under the conditions of pig farm biogas slurry influent ammonium concentration is stepped up.The startup method of processing pig farm biogas slurry SNAD techniques disclosed in this invention, has the advantages of energy consumption is low, and cost is low, and TN clearance is high.

Description

A kind of startup method for handling pig farm biogas slurry SNAD techniques
Technical field
The present invention relates to a kind of sewage water treatment method, and in particular to a kind of startup side for handling pig farm biogas slurry SNAD techniques Method.
Background technology
Because the consumption of meat product rises year by year, livestock and poultry breeding industry fast development, particularly pig-breeding industry are present Through the important industry as the relation people's livelihood, but also bring the excrement and pig farm flushing waste water of bulky.Pig farm discharge COD (COD) and total nitrogen (TN) in waste water containing high concentration, its concentration is respectively in 5000-8000mgL-1And 300- 600mg·L-1Left and right.These high COD, high ammonia nitrogen (NH4+-N) organic wastewater seriously pollutes surface water and groundwater, and water body is rich Nutrient laden is serious, and water source is quoted in a large amount of microbes pollutions such as parasite contained therein, jeopardizes health.Therefore to this Class Pig raising wastewater carries out efficient denitrification except carbon and harmless treatment are particularly necessary.
Currently used processing mode is to carry out anaerobic fermentation processing to piggery wastewater, to reach processing intent and realize Recycling.Piggery wastewater is after anaerobic fermentation is handled, although most COD is removed, due to organic in raw wastewater Thing is very big, therefore the still COD containing higher concentration in water outlet.At the same time, after anaerobic fermentation, although organic nitrogen is converted into Inorganic nitrogen, but nitrogen content is not reduced, NH4+-N concentration is still very high.It can be seen that anaerobic fermentation processing has to organic matter Preferably remove, and to NH4+-N does not almost have removal effect, and this has resulted in the production of the low high ammonia nitrogen anaerobic fermentation biogas slurries of C/N It is raw.
At present, China pig farm biogas slurry is mainly handled and biological treatment by natural Process.In natural Process processing Most important method is artificial swamp, but the problems such as processing pollutional load is low, regulation and control are inaccurate, floor space is big be present.Biology Facture mainly by the decomposition of microorganism, is purified sewage.Currently used biological denitrification process includes A2/O、 Inversion A2/ O, SBR etc..But above-mentioned technique is bad to the treatment effect of low C/N waste water.Traditional biological denitrification process is being located at present When managing low C/N biogas slurries waste water, there is that ammonia nitrogen removal is ineffective or TN removes instability problem.There are some researches show using normal When advising biological denitrification process, the C/N of waste water will be maintained at 10:More than 1, it is less than 8 in C/N:In the case of 1, waste water TN removal Rate only has 10%-20%.Need to add organic carbon source in addition, and need higher concentration dissolved oxygen DO to enter under conditions of participating in OK, energy consumption is added, increases intractability and cost of investment.Therefore the technique for developing a kind of Novel low-consumption, efficient denitrification It is very necessary.
It is that a kind of denitrogenation that Recent study person propose is new that short distance nitration-anaerobic ammoxidation, which couples anti-nitre technique (SNAD), Technique, i.e., nitrococcus (AOB) and anaerobic ammonia oxidizing bacteria (Anammox) carry out autotrophic denitrification reaction in a reaction unit, Denitrifying bacteria is then in the presence of organic matter, by a small amount of NO caused by autotrophic denitrification3-- N is reduced to N2.This technique is given up to low C/N Water has good denitrification effect, and need to only provide limited aeration, reduces energy consumption, while it can be real by denitrification Now give up the removal in the lump of Organic substance in water, the shortcomings that overcoming traditional denitrogenation, the processing of particularly suitable such low C/N biogas slurries.So And SNAD techniques are as a kind of emerging technique, the technique focuses mostly in laboratory simulation water distribution and batch-type reaction dress at present Put startup, the application of the startups of SNAD techniques in Practical Project is also considerably less.
At present, the research of batch-type sbr reactor device is more, and continuous flow reactor realizes SNAD techniques due in actual work Startup in journey is relatively difficult, at present using less；But SNAD techniques have the advantages that processing flow is big, are easily managed, into For the main technique of current major sewage treatment plant.Therefore, it is always people SNAD techniques to be applied into the startup in Practical Project Endeavour research direction.
The content of the invention
The purpose of the present invention is to propose to a kind of startup method for handling pig farm biogas slurry SNAD techniques, entered using the reaction unit The startup method of row SNAD techniques has the advantages of energy consumption is low, and cost is low, and TN clearance is high.
The purpose of the present invention is following technical proposals to realize：
A kind of startup method for handling pig farm biogas slurry SNAD techniques, comprises the steps：
(1) Round Sump continuous stream reaction unit is built；
(2) sludge-biomembrance process composite integrated denitrification process is built：Using anaerobic ammonium oxidation sludge and nitrifying sludge to connect Kind sludge, the interior addition seed sludge of Round Sump continuous stream reaction unit into step (1), while add PVC polyester filler；
(3) start：Dissolved oxygen DO is controlled in 0.2-0.6mgL-1, hydraulic detention time controls to exist in 0.6-1.5d, temperature 26-32 DEG C, pig farm biogas slurry inlet flow-patterm is in 7.5-8.2, and pig farm biogas slurry influent ammonium concentration is in 245mgL-1-455mg·L-1, Step up and start SNAD techniques under the conditions of the biogas slurry influent ammonium concentration of pig farm.
Further, it is that pig farm is improved using the dilute strength for progressively reducing actual pig farm biogas slurry in the step (3) The ammonia nitrogen concentration of biogas slurry, in the start-up course of SNAD techniques, pig farm biogas slurry influent ammonium concentration is：
A、1-50d：Pig farm biogas slurry influent ammonium concentration is 245mgL-1-255mg·L-1；Startup stage；
B、51-110d：Pig farm biogas slurry influent ammonium concentration is 345mgL-1-355mg·L-1；Startup stage；
C、110-140d：Pig farm biogas slurry influent ammonium concentration is 445mgL-1-455mg·L-1；SNAD techniques are formed.
Further, it is that pig is improved using the dilute strength for progressively reducing actual pig farm biogas slurry in the step (3) The ammonia nitrogen concentration of biogas slurry, in the start-up course of SNAD techniques, pig farm biogas slurry influent ammonium concentration is：
A、1-50d：Pig farm biogas slurry influent ammonium concentration is 250mgL-1；Startup stage；
B、51-110d：Pig farm biogas slurry influent ammonium concentration is 350mgL-1；Startup stage；
C、110-140d：Pig farm biogas slurry influent ammonium concentration is 450mgL-1；SNAD techniques are formed.
Further, the seed sludge in the step (2) is anaerobic ammonium oxidation sludge and nitrifying sludge 5- by volume 9：1-5 is mixed.
Further, the seed sludge in the step (2) be anaerobic ammonium oxidation sludge and nitrifying sludge by volume 7：3 mix.
Further, in the step (2), the inoculum concentration of the seed sludge is the 1/5-1/3 of cell body dischargeable capacity.
Further, in the step (2), the inoculum concentration of the seed sludge is the 1/4 of cell body dischargeable capacity.
Further, in the step (2), the filling rate of PVC polyester filler is 30-60%.
Further, in the step (2), the filling rate of PVC polyester filler is 45%.
Further, in the step (1), Round Sump continuous stream reaction unit includes cell body and aerator；The groove A dividing plate is provided with vivo, cell body is divided into reaction zone and settling zone by the dividing plate, and the bottom of reaction zone and settling zone communicates；Institute The top for stating reaction zone is provided with the water inlet pipe that pig farm biogas slurry enters, and the top of the settling zone is provided with outlet pipe；The reaction zone Sludge is inoculated with the bottom of settling zone, and the height of sludge is higher than the bottom margin of dividing plate；The aerator includes exposing Air pump, flowmeter and microporous aeration disc, the microporous aeration disc are located at the bottom of reaction zone；Also include pig farm biogas slurry case and water outlet Case；One end of the water inlet pipe is connected on the biogas slurry case of pig farm, and intake pump is connected with water inlet pipe；The end of the outlet pipe It is connected on water tank, outlet valve is connected with the outlet pipe.
The beneficial effects of the present invention are：
(1) the startup method of the processing pig farm biogas slurry SNAD techniques in the present invention, realizes processing in continuous stream device The startup of the SNAD techniques of actual low-carbon high ammonia-nitrogen wastewater, application of the SNAD techniques in Practical Project is pushed further into, this Invention carries out the startup of SNAD techniques, for the work using the actual pig farm biogas slurry of the high ammonia nitrogens of low C/N as process object under continuous flowing The actual biogas slurry of skill processing provides technical parameter；
(2) the startup method of the processing pig farm biogas slurry SNAD techniques in the present invention, constructed processing pig farm biogas slurry SNAD The reaction unit of technique, it is only necessary to build one structures of cell body, (traditional typical case is complete relative to traditional nitration denitrification technique Journey nitrification-denitrification technique is (such as：A/O techniques), usually contain nitrification tank, denitrification pond and sludge recirculation system；And Nitrification tank workshop section needs to add alkali, denitrification pond needs additional carbon etc.) for, structures quantity is few, saved manpower and Fund cost；And the startup method of the present invention, without additional carbon and basicity, also save reagent cost.
(3) the processing pig farm biogas slurry SNAD techniques in the present invention are integral type Round Sump continuous flow process, with actual low-carbon High ammonia nitrogen pig farm biogas slurry is water inlet, control ground DO, uses and steps up startup strategy of the influent ammonium concentration for SNAD techniques；Into Work(realizes the startup that short distance nitration-anaerobic ammoxidation couples anti-nitre technique (SNAD) processing pig farm biogas slurry, startup SNAD works The device and Starting mode of skill equally use other low-carbon high ammonia-nitrogen wastewaters.Relative to tradition system biological nitrification and denitrification denitrogenation work For skill, there is raising largely compared with prior art to TN average removal rate, specifically, the place in the present invention The startup method of reason pig farm biogas slurry SNAD techniques has the advantage that：
1. in low concentration dissolved oxygen, (dissolved oxygen DO is controlled in 0.2-0.6mgL-1) under the conditions of can carry out SNAD techniques Startup and stable operation, can save 62.5% compared with prior art；
2. organic carbon source need not be added in addition, 100% carbon source can be saved compared with prior art；
3. 61%-74% can be reached to TN average removal rates；Compared with prior art, TN average removal rates can be carried It is high 2-3 times；
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation that the present invention starts Round Sump continuous stream reaction unit in embodiment 1-3；
Fig. 2 is the index variation diagram that the present invention starts pig farm biogas slurry Inlet and outlet water ammonia nitrogen in embodiment 1；
Fig. 3 is the index variation diagram that the present invention starts pig farm biogas slurry Inlet and outlet water TN in embodiment 1；
Fig. 4 is that the present invention starts pig farm biogas slurry Inlet and outlet water (NO in embodiment 13--N+NO2--N)/△NH4+-N index becomes Change figure；
Fig. 5 is the index variation diagram that the present invention starts pig farm biogas slurry Inlet and outlet water COD in embodiment 1.
In figure：1st, pig farm biogas slurry case；2nd, water tank；3rd, cell body；301st, dividing plate；302nd, reaction zone；303rd, settling zone；4th, expose Device of air；401st, aeration pump；402nd, flowmeter；403rd, microporous aeration disc；5th, water inlet pipe；6th, intake pump；7th, outlet pipe；8th, water outlet Valve；9th, seed sludge；10th, PVC polyester filler；11st, dissolved oxygen instrument；12nd, pH meter；13rd, sample tap.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical scheme will be carried out below Detailed description.Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Base Embodiment in the present invention, those of ordinary skill in the art are resulting on the premise of creative work is not made to be owned Other embodiment, belong to the scope that the present invention is protected.
As Figure 1-Figure 5：
Start embodiment 1：
First, a kind of startup method for handling pig farm biogas slurry SNAD techniques, comprises the steps：
(1) Round Sump continuous stream reaction unit is built：
The Round Sump continuous stream reaction unit includes cell body 3 and aerator 4.
It is provided with a dividing plate 301 in the cell body 3, the dividing plate 301 divides cell body 3 for reaction zone 302 and settling zone 303, And the bottom of reaction zone 302 and settling zone 303 communicates.
The top of the reaction zone 302 is provided with the water inlet pipe 5 that pig farm biogas slurry enters, and the top of the settling zone 303 is provided with Outlet pipe 7；The bottom of the reaction zone 302 and settling zone 303 is inoculated with sludge, and the height of sludge is higher than dividing plate 301 Bottom margin；The aerator 4 includes aeration pump 401, flowmeter 402 and microporous aeration disc 403, the microporous aeration disc 403 are located at the bottom of reaction zone 302；Also include pig farm biogas slurry case 1 and water tank 2；One end of the water inlet pipe 5 is connected to pig farm On biogas slurry case 1, and intake pump 6 is connected with water inlet pipe 5；The end of the outlet pipe 7 is connected on water tank 2, the water outlet Outlet valve 8 is connected with pipe 7.
The bottom of the reaction zone 302 is inoculated with seed sludge 9；The aerator 4 includes aeration pump 401, air stream Gauge 402 and microporous aeration disc 403, the microporous aeration disc 403 are located at the bottom of reaction zone 302.
Monitoring dissolved oxygen and pH dissolved oxygen instrument 11 and pH meter 12 are provided with the reaction zone 302；Also set on the cell body 3 There is sample tap 13.
(2) sludge-biomembrance process composite integrated denitrification process is built：
Using volume ratio as 7：3 anaerobic ammonium oxidation sludge and nitrifying sludge is mixed into seed sludge 9；Into step (1) Addition seed sludge 9 in Round Sump continuous stream reaction unit, the inoculum concentration of the seed sludge 9 are to have in the reaction zone 302 of cell body 3 The 1/4 of volume is imitated, while adds PVC polyester filler 10, the filling rate of the PVC polyester filler 10 is 45%；
(3) start：Dissolved oxygen DO is controlled in 0.2-0.6mgL-1, hydraulic detention time controls to exist in 0.6-1.5d, temperature 26-32 DEG C, pig farm biogas slurry inlet flow-patterm is in 7.5-8.2, and pig farm biogas slurry influent ammonium concentration is in 245mgL-1-455mg·L-1, Step up and start SNAD techniques under the conditions of the biogas slurry influent ammonium concentration of pig farm.
It is that the ammonia of pig farm biogas slurry is improved using the dilute strength for progressively reducing actual pig farm biogas slurry in the step (3) Nitrogen concentration, in the start-up course of SNAD techniques, pig farm biogas slurry influent ammonium concentration is：
A、1-50d：Pig farm biogas slurry influent ammonia nitrogen mean concentration is 250mgL-1；Startup stage；
B、51-110d：Pig farm biogas slurry influent ammonia nitrogen mean concentration is 350mgL-1；Startup stage；
C、110-140d：Pig farm biogas slurry influent ammonia nitrogen mean concentration is 450mgL-1；SNAD techniques are formed.
2nd, the stable operation of SNAD techniques：
1st, water outlet (NO3--N+NO2--N)/△NH4+-N
The growing amount of nitrate nitrogen and nitrite nitrogen accounts for the percentage of ammonia nitrogen removal amount, for evaluating short distance nitration-anaerobic ammonia Oxidation-denitrification coupling denitrification process (SNAD) technique starts the performance of success or not and SNAD reaction units.It is calculated as follows Shown in formula:
In SNAD systems, short distance nitration and the Anammox reaction of combination produce about 11% nitrate nitrogen, and heterotrophism is anti- The presence of nitrifier can be using organic matter as electron donor by caused a small amount of NO3 -- N is reduced to N2.Therefore, (NO3 --N+ NO2 --N)/△NH4 +- N numerical value should be less than 0.11 in SNAD systems, while this numerical value can also weigh SNAD systems even Long-time stability in afterflow system.
In start-up course, water outlet (NO3 --N+NO2 --N)/△NH4 +- N ratio situation of change is as shown in Figure 4.140d it Water outlet (NO afterwards3 --N+NO2 --N)/△NH4 +- N values begin lower than theoretical value 0.11, illustrate to form the anti-nitre of heterotrophism in reaction unit Change process, a small amount of nitrate nitrogen that Anammox is reacted to generation are converted into nitrogen.Show in SNAD process operations to 140d Start, SNAD techniques tentatively start success.
2nd, 141-180d (stable operation stage of SNAD techniques)：Biogas slurry influent ammonia nitrogen mean concentration is 451.3mgL-1； Reaction unit in Application Example 1 carries out SNAD reactions.
During whole startup optimization (1-180d), pig farm biogas slurry Inlet and outlet water ammonia nitrogen, TN, water outlet (NO3 --N+NO2 --N)/ △NH4 +- N and the change of COD indexs are as shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5)
As a result：The startup method of SNAD techniques can quickly realize the SNAD for handling actual biogas slurry in 140d in the present invention Technique；After starting successfully, in 141-180d, the average removal rate to the ammonia nitrogen in the biogas slurry of pig farm, total nitrogen, COD is respectively 65.86%th, 55.39%, 75.21%.
Start embodiment 2：
First, a kind of startup method for handling pig farm biogas slurry SNAD techniques, comprises the steps：
(1) build Round Sump continuous stream reaction unit (with embodiment 1 is started)；
(2) sludge-biomembrance process composite integrated denitrification process is built：
Using volume ratio as 5：5 anaerobic ammonium oxidation sludge and nitrifying sludge is mixed into seed sludge 9；Into step (1) Addition seed sludge 9 in Round Sump continuous stream reaction unit, the inoculum concentration of the seed sludge 9 are to have in the reaction zone 302 of cell body 3 The 1/3 of volume is imitated, while adds PVC polyester filler 10, the filling rate of the PVC polyester filler 10 is 60%；
(3) start：Dissolved oxygen DO is controlled in 0.2-0.6mgL-1, hydraulic detention time controls to exist in 0.6-1.5d, temperature 26-32 DEG C, pig farm biogas slurry inlet flow-patterm is in 7.5-8.2, and pig farm biogas slurry influent ammonium concentration is in 245mgL-1-455mg·L-1, Step up and start SNAD techniques under the conditions of the biogas slurry influent ammonium concentration of pig farm.
It is that the ammonia of pig farm biogas slurry is improved using the dilute strength for progressively reducing actual pig farm biogas slurry in the step (3) Nitrogen concentration, in the start-up course of SNAD techniques, pig farm biogas slurry influent ammonium concentration is：
A、1-50d：Pig farm biogas slurry influent ammonia nitrogen mean concentration is 245mgL-1；Startup stage；
B、51-110d：Pig farm biogas slurry influent ammonia nitrogen mean concentration is 355mgL-1；Startup stage；
C、110-140d：Pig farm biogas slurry influent ammonia nitrogen mean concentration is 445mgL-1；SNAD techniques are formed.
2nd, the stable operation of SNAD techniques：
1st, water outlet (NO3 --N+NO2 --N)/△NH4 +-N
In start-up course, water outlet (NO after 140d3 --N+NO2 --N)/△NH4 +- N values begin lower than theoretical value 0.11, Illustrate to form heterotrophic denitrification process in reaction unit, a small amount of nitrate nitrogen that Anammox is reacted to generation is converted into nitrogen Gas.Show to 140d to start in SNAD process operations, SNAD techniques tentatively start success.
2nd, 141-180d (stable operation stage of SNAD techniques)：Pig farm biogas slurry influent ammonia nitrogen mean concentration is 470.4mg·L-1。
As a result：The startup method of SNAD techniques can quickly realize the SNAD for handling actual biogas slurry in 140d in the present invention Technique；After starting successfully, in 141-180d, the average removal rate to the ammonia nitrogen in the biogas slurry of pig farm, total nitrogen, COD is respectively 65.79%th, 54.98%, 74.87%.
Start embodiment 3：
First, a kind of startup method for handling pig farm biogas slurry SNAD techniques, comprises the steps：
(1) build Round Sump continuous stream reaction unit (with embodiment 1 is started)；
(2) sludge-biomembrance process composite integrated denitrification process is built：
Using volume ratio as 9：1 anaerobic ammonium oxidation sludge and nitrifying sludge is mixed into seed sludge 9；Into step (1) Addition seed sludge 9 in Round Sump continuous stream reaction unit, the inoculum concentration of the seed sludge 9 are to have in the reaction zone 302 of cell body 3 The 1/5 of volume is imitated, while adds PVC polyester filler 10, the filling rate of the PVC polyester filler 10 is 30%；
(3) start：Dissolved oxygen DO is controlled in 0.2-0.6mgL-1, hydraulic detention time controls to exist in 0.6-1.5d, temperature 26-32 DEG C, pig farm biogas slurry inlet flow-patterm is in 7.5-8.2, and pig farm biogas slurry influent ammonium concentration is in 245mgL-1-455mg·L-1, Step up and start SNAD techniques under the conditions of the biogas slurry influent ammonium concentration of pig farm.
It is that the ammonia of pig farm biogas slurry is improved using the dilute strength for progressively reducing actual pig farm biogas slurry in the step (3) Nitrogen concentration, in the start-up course of SNAD techniques, pig farm biogas slurry influent ammonium concentration is：
A、1-50d：Pig farm biogas slurry influent ammonium concentration is 255mgL-1；Startup stage；
B、51-110d：Pig farm biogas slurry influent ammonium concentration is 345mgL-1；Startup stage；
C、110-140d：Pig farm biogas slurry influent ammonium concentration is 455mgL-1；SNAD techniques are formed.
2nd, the stable operation of SNAD techniques：
1st, water outlet (NO3 --N+NO2 --N)/△NH4 +-N
In start-up course, water outlet (NO after 140d3 --N+NO2 --N)/△NH4 +- N values begin lower than theoretical value 0.11, Illustrate to form heterotrophic denitrification process in reaction unit, a small amount of nitrate nitrogen that Anammox is reacted to generation is converted into nitrogen Gas.Show to 140d to start in SNAD process operations, SNAD techniques tentatively start success.
2nd, 141-180d (stable operation stage of SNAD techniques)：Pig farm biogas slurry influent ammonia nitrogen mean concentration is 461.6mg·L-1。
As a result：The startup method of SNAD techniques can quickly realize the SNAD for handling actual biogas slurry in 140d in the present invention Technique；After starting successfully, in 141-180d, the average removal rate to the ammonia nitrogen in the biogas slurry of pig farm, total nitrogen, COD is respectively 66.03%th, 55.89%, 75.45%.
Application Example 1-3：
Following Application Example 1-3 are basic as operation to start the SNAD techniques in embodiment 1, wherein：Pig farm biogas slurry Water inlet：Ammonia nitrogen concentration is in 430-480mgL-1, TN is in 460-510mgL-1, COD is in 200-400mgL-1, TP is in 8- 20mg·L-1, pH is in 7.5-8.2；Temperature is controlled at 28-30 DEG C；DO is controlled in 0.2-0.3mgL-1.Using result such as table 1 below It is shown：
The application result of the SNAD process stabilizings of table 1 operation
In above-mentioned Application Example 1-3, to NH4+-N average removal rate, it is averaged to TN average removal rates and to COD Clearance has raising largely, and (NO compared with prior art3--N+NO2--N)/△NH4+-N values are below Autotrophic denitrification theoretical value 0.11, illustrate that this experiment starts successful SNAD reaction systems stabilization, short distance nitration-anaerobic ammoxidation coupling Close denitrification process operational excellence.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims (10)

  1. A kind of 1. startup method for handling pig farm biogas slurry SNAD techniques, it is characterised in that：Comprise the steps：
    (1) Round Sump continuous stream reaction unit is built；
    (2) sludge-biomembrance process composite integrated denitrification process is built：It is dirty as inoculation using anaerobic ammonium oxidation sludge and nitrifying sludge Mud, the interior addition seed sludge of Round Sump continuous stream reaction unit into step (1), while add PVC polyester filler；
    (3) start：Dissolved oxygen DO is controlled in 0.2-0.6mgL-1, hydraulic detention time control is in 0.6-1.5d, and temperature is in 26- 32 DEG C, pig farm biogas slurry inlet flow-patterm is in 7.5-8.2, and pig farm biogas slurry influent ammonium concentration is in 245mgL-1-455mg·L-1, by Step starts SNAD techniques under the conditions of improving pig farm biogas slurry influent ammonium concentration.
  2. 2. the startup method of processing pig farm biogas slurry SNAD techniques according to claim 1, it is characterised in that：The step (3) it is that the ammonia nitrogen concentration of pig farm biogas slurry is improved using the dilute strength for progressively reducing actual pig farm biogas slurry in, SNAD techniques In start-up course, pig farm biogas slurry influent ammonium concentration is：
    A、1-50d：Pig farm biogas slurry influent ammonium concentration is 245mgL-1-255mg·L-1；Startup stage；
    B、51-110d：Pig farm biogas slurry influent ammonium concentration is 345mgL-1-355mg·L-1；Startup stage；
    C、110-140d：Pig farm biogas slurry influent ammonium concentration is 445mgL-1-455mg·L-1；SNAD techniques are formed.
  3. 3. the startup method of processing pig farm biogas slurry SNAD techniques according to claim 1 or 2, it is characterised in that：The step Suddenly it is that the ammonia nitrogen concentration of pig farm biogas slurry, SNAD techniques are improved using the dilute strength for progressively reducing actual pig farm biogas slurry in (3) Start-up course in, pig farm biogas slurry influent ammonium concentration is：
    A、1-50d：Pig farm biogas slurry influent ammonium concentration is 250mgL-1；Startup stage；
    B、51-110d：Pig farm biogas slurry influent ammonium concentration is 350mgL-1；Startup stage；
    C、110-140d：Pig farm biogas slurry influent ammonium concentration is 450mgL-1；SNAD techniques are formed.
  4. 4. the startup method of processing pig farm biogas slurry SNAD techniques according to claim 3, it is characterised in that：The step (2) seed sludge in is anaerobic ammonium oxidation sludge and nitrifying sludge 5-9 by volume：1-5 is mixed.
  5. 5. the startup method of processing pig farm biogas slurry SNAD techniques according to claim 4, it is characterised in that：The step (2) seed sludge in is anaerobic ammonium oxidation sludge and nitrifying sludge by volume 7：3 mix.
  6. 6. the startup method of processing pig farm biogas slurry SNAD techniques according to claim 5, it is characterised in that：The step (2) in, the inoculum concentration of the seed sludge is the 1/5-1/3 of cell body dischargeable capacity.
  7. 7. the startup method of the processing pig farm biogas slurry SNAD techniques according to claim 5 or 6, it is characterised in that：The step Suddenly in (2), the inoculum concentration of the seed sludge is the 1/4 of cell body dischargeable capacity.
  8. 8. the startup method of processing pig farm biogas slurry SNAD techniques according to claim 7, it is characterised in that：The step (2) in, the filling rate of PVC polyester filler is 30-60%.
  9. 9. the startup method of processing pig farm biogas slurry SNAD techniques according to claim 8, it is characterised in that：The step (2) in, the filling rate of PVC polyester filler is 45%.
  10. 10. the startup method of processing pig farm biogas slurry SNAD techniques according to claim 9, it is characterised in that：The step (1) in, Round Sump continuous stream reaction unit includes cell body and aerator；A dividing plate is provided with the cell body, the dividing plate will Cell body is divided into reaction zone and settling zone, and the bottom of reaction zone and settling zone communicates；The top of the reaction zone is provided with pig farm natural pond The water inlet pipe that liquid enters, the top of the settling zone is provided with outlet pipe；The bottom of the reaction zone is inoculated with seed sludge；It is described Aerator includes aeration pump, flowmeter and microporous aeration disc, and the microporous aeration disc is located at the bottom of reaction zone；Also include pig Field biogas slurry case and water tank；One end of the water inlet pipe is connected on the biogas slurry case of pig farm, and intake pump is connected with water inlet pipe；Institute The end for stating outlet pipe is connected on water tank, and outlet valve is connected with the outlet pipe.
CN201710709148.6A 2017-08-17 2017-08-17 A kind of startup method for handling pig farm biogas slurry SNAD techniques Pending CN107445297A (en)

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Application publication date: 20171208