CN109912015A - A kind of biological denitrification process of livestock breeding wastewater - Google Patents
A kind of biological denitrification process of livestock breeding wastewater Download PDFInfo
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- CN109912015A CN109912015A CN201910308011.9A CN201910308011A CN109912015A CN 109912015 A CN109912015 A CN 109912015A CN 201910308011 A CN201910308011 A CN 201910308011A CN 109912015 A CN109912015 A CN 109912015A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a kind of biological denitrification process of livestock breeding wastewater, the following steps are included: by Wastewater Pretreatment, then anoxic pond, anaerobic pond, aerobic tank, settling tank is sequentially entered to be handled, and biological denitrificaion carrier is prepared using new method, and oxygenolysis medicament is added while putting into biological denitrificaion carrier；The present invention can respectively remove the biggish solid pollutant of quality, organic matter and microorganism etc.；Good sewage processing effect is worthy to be popularized.
Description
Technical field
The present invention relates to sewage treatment process field, especially a kind of biological denitrification process of livestock breeding wastewater.
Background technique
Livestock and poultry cultivation sewage treatment belongs to the high concentration organic sewage rich in a large amount of pathogen, be discharged directly into water body or
Storage place is improper, is entered water body by rain-out, it would be possible to cause the severe exacerbation of surface water or quality of groundwater.Due to
The leaching of Animal fecal pollution is very strong, and the leaching such as nitrogen, phosphorus and water soluble organic substance in fecaluria are very big, if do not dealt carefully with, just
Water table polluted underground water can be entered by rainwash and diafiltration.Influence to surface water is then mainly shown as, great Liang You
After machine substance enters water body, the dissolved oxygen in a large amount of consumption water is kept water body smelly by the decomposition of organic matter；When the dissolution in water body
After oxygen sharp fall, large amount of organic matter can continue to decompose under anaerobic, and methane, hydrogen sulfide etc. will be generated in decomposition
Toxic gas leads to aquatile mortality；A large amount of suspended matters in sewage can make water body muddy, reduce the light of algae in water
Cooperation use, limit the normal activity of aquatile, make it is gradually dead to the aquatile that organic pollution is sensitive, thus further
Aggravate water bottom anoxic, makes the reduction of water body assimilative capacicy；Nitrogen, phosphorus can make water eutrophication, and the result of eutrophication can make
NO3-N and NO2-N excessive concentration in water body, if people and animals' long-term drinking can cause to be poisoned, and the growth of some toxic algaes
A large amount of toxin can be discharged in water body with mass propagation, lead to the mortality of aquatic animal, to seriously destroy water body
The ecological balance；Some germs, virus in fecaluria etc. may cause certain epiphytotics propagation etc. with water flowing.
Currently, if livestock breeding wastewater treatment process is using Anaerobic Microbiological Treatment Technology, its advantage is that can efficient degradation
Organic pollutant in water, but be difficult to remove the ammonia nitrogen in waste water.Denitrogenation generally comprises three ammonification, nitrification, denitrification processes,
Organic nitrogen was converted into ammoniacal nitrogen by heterotrophic bacterium before this, and ammoniacal nitrogen is nitrite nitrogen nitrogen, nitrous by autotrophic type oxidation by nitrobacteria
State nitrogen is again nitrate nitrogen by autotrophic type oxidation by nitrobacteria, and nitrite nitrogen and nitrate-nitrogen reduction are gas by last heterotroph denitrifying bacterium
State nitrogen is removed from sewage.However there are following contradictions for biological denitrification process: nitrifier is stringent aerobic bacteria, and nitration reaction needs
Aerobic environment, and denitrifying bacterium is facultative anaerobic bacteria, needs to carry out under anaerobic environment.Therefore, livestock and poultry breeding industry ammonia nitrogen in waste water
It is difficult qualified discharge, urgent need develops a kind of biological denitrification process and solves the problems, such as this.
Summary of the invention
To solve the above problems, the invention discloses a kind of biological denitrification process of livestock breeding wastewater, packets
Include following steps:
S0: pretreatment: waste water is introduced into physical processing unit, waste water is stirred, is filtered, primary wastewater is obtained；
S1: biological denitrificaion carrier is put into anoxic pond, control oxygen content: 0 < DO < 1.0mg/L, primary wastewater enter anoxic pond, adjust
The PH to 7-9 of primary wastewater is saved, handle the time: 3-5h obtains primary wastewater:；
S2: primary wastewater is introduced into anaerobic pond, obtains secondary waste water；
S3: secondary waste water is introduced into aerobic tank, control oxygen content: 5 < DO < 10mg/L obtains three-level waste water；
S4: three-level waste water is introduced sequentially into anoxic pond, aerobic tank, aerobic tank again, obtains level Four waste water；
S5: level Four waste water is introduced into settling tank, 3-5h is settled, supernatant liquor is introduced into clarifier-tank.
As preferable real scheme of the invention, the production method of the biological denitrificaion carrier is carried out by following procedure:
A, high-quality oyster shell and active carbon, granularity requirements 3-8mm sorting: are selected；Plastic carrier be by oyster shell and active carbon respectively
Filamentous or velutinate carrier can be blended with plastics and be processed by being crushed to；
B, carrier carries bacterium culture: with 2 liters with 2.0 grams of upper container chlorination ammonia, 1200 milliliters of ordinary water, and with sodium carbonate tune pH value 7.5-
8.0, add 200 grams of clarifier sludge, be mixed, adds 1000 grams of oyster shell, aeration culture 10-15 days under conditions of 25-30 DEG C.If
Ammonia nitrogen is reduced to zero continuous plus ammonium chloride, and pH value is lower than 7.0 plus sodium carbonate is adjusted to provide.Ammonia nitrogen shape is detected with reagent colorimetric method
Whether condition is generated and qualified with judging to carry thallus；
C, carrier expands culture: will cultivate nitrifier carrier that is appropriate and taming and has washed away sludge, has mixed in oyster shell 1:3 ratio
Uniformly, bacterium cultural method expanding species is carried by carrier.
As preferable real scheme of the invention, in the step S1 dosage of biological denitrificaion carrier be every liter of waste water 2~
3g。
As preferable real scheme of the invention, run in a manner of being aerated 1-3h, stopping being aerated 3-6h in the step S3.
As preferable real scheme of the invention, in the step S5 when in waste water COD concentration be down to 200~500mg/L and
Ammonia nitrogen concentration introduces settling tank when being down to 10~30mg/L.
As preferable real scheme of the invention, also thrown while putting into anoxic pond with biological denitrificaion carrier in the step S1
Enter oxygenolysis medicament.
As preferable real scheme of the invention, the oxygenolysis medicament is one or both of potassium ferrate and ozone
Combination.
As preferable real scheme of the invention, when potassium ferrate individually adds its be added to the concentration in sewage be 50~
100mg/L, it is 15~180mg/L that when ozone individually adds, it, which is added to the concentration in sewage, when potassium ferrate and ozone join
When conjunction adds, potassium ferrate be added to the concentration in sewage be 20~150mg/L, ozone be added to the concentration in sewage be 1~
20mg/L。
Beneficial effects of the present invention: (1) removal rate > when the biological denitrificaion carrier ammonia nitrogen of this law preparation is 8.0mg/L
85%；Volume Nitrification rate is greater than 9.0kg/ (m3.d).(2) present invention using oyster shell and active carbon as biological denitrificaion carrier,
Biological nitration bacterium can be carried well, but also dual adsorption effect can be played to waste water, and active carbon also have compared with
Excellent desorption and regeneration performance；(3) there is the Strong oxdiatives process such as potassium ferrate or ozone in technique of the invention, make a large amount of phosphorus from
It is discharged into the cell extracellularly, is conducive to induced crystallization dephosphorization and its phosphor resourceization recycles.(4) present invention can divide
The biggish solid pollutant of quality, organic matter and microorganism etc. are not removed；Good sewage processing effect.
Detailed description of the invention
Fig. 1 is the schematic diagram of present invention process process.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention is further explained with embodiment with reference to the accompanying drawing.
A kind of biological denitrification process of livestock breeding wastewater, comprising the following steps:
S0: pretreatment: waste water is introduced into physical processing unit, waste water is stirred, is filtered, primary wastewater is obtained；
S1: biological denitrificaion carrier is put into anoxic pond, dosage is every liter of 2~3g of waste water；
Control oxygen content: 0 < DO < 1.0mg/L, primary wastewater enter anoxic pond, adjust the PH to 7-9 of primary wastewater, when processing
Between: 3-5h obtains primary wastewater:；
S2: primary wastewater is introduced into anaerobic pond, obtains secondary waste water；
S3: introducing aerobic tank for secondary waste water, is run in a manner of being aerated 1-3h, stopping being aerated 3-6h；Control oxygen content: 5 < DO <
10mg/L obtains three-level waste water；
S4: three-level waste water is introduced sequentially into anoxic pond, aerobic tank, aerobic tank again, obtains level Four waste water；
S5: when COD concentration is down to 200~500mg/L and when ammonia nitrogen concentration is down to 10~30mg/L, level Four waste water is drawn in waste water
Into settling tank, 3-5h is settled, supernatant liquor is introduced into clarifier-tank.
As preferable real scheme of the invention, the production method of the biological denitrificaion carrier is carried out by following procedure:
A, high-quality oyster shell and active carbon, granularity requirements 3-8mm sorting: are selected；Plastic carrier be by oyster shell and active carbon respectively
Filamentous or velutinate carrier can be blended with plastics and be processed by being crushed to；
B, carrier carries bacterium culture: with 2 liters with 2.0 grams of upper container chlorination ammonia, 1200 milliliters of ordinary water, and with sodium carbonate tune pH value 7.5-
8.0, add 200 grams of clarifier sludge, be mixed, adds 1000 grams of oyster shell, aeration culture 10-15 days under conditions of 25-30 DEG C.If
Ammonia nitrogen is reduced to zero continuous plus ammonium chloride, and pH value is lower than 7.0 plus sodium carbonate is adjusted to provide.Ammonia nitrogen shape is detected with reagent colorimetric method
Whether condition is generated and qualified with judging to carry thallus；
C, carrier expands culture: will cultivate nitrifier carrier that is appropriate and taming and has washed away sludge, has mixed in oyster shell 1:3 ratio
Uniformly, bacterium cultural method expanding species is carried by carrier.
As preferable real scheme of the invention, also thrown while putting into anoxic pond with biological denitrificaion carrier in the step S1
Enter oxygenolysis medicament；The oxygenolysis medicament is the combination of one or both of potassium ferrate and ozone；Work as ferric acid
It is 50~100mg/L that it, which is added to the concentration in sewage, when potassium individually adds, and when ozone individually adds, it is added in sewage
Concentration be 15~180mg/L, when potassium ferrate and ozone multi-step dosage, potassium ferrate be added to the concentration in sewage be 20
~150mg/L, it is 1~20mg/L that ozone, which is added to the concentration in sewage,.
Embodiment 1
A kind of biological denitrification process of livestock breeding wastewater, comprising the following steps:
S0: pretreatment: waste water is introduced into physical processing unit, waste water is stirred, is filtered, primary wastewater is obtained；
S1: biological denitrificaion carrier is put into anoxic pond, dosage is every liter of waste water 2g；Oxygen content position 0.5mg/L is controlled, primary is useless
Water enters anoxic pond, adjusts the PH to 7 of primary wastewater, and handle the time: 3h obtains primary wastewater, the life of the biological denitrificaion carrier
Production method is as follows:
A, high-quality oyster shell and active carbon, granularity requirements 5mm sorting: are selected；Plastic carrier is by the respective powder of oyster shell and active carbon
Filamentous or velutinate carrier can be blended with plastics and be processed by being broken to；
B, carrier carries bacterium culture: with 2 liters with 2.0 grams of upper container chlorination ammonia, 1200 milliliters of ordinary water, and with sodium carbonate tune pH value 7.5,
Add 200 grams of clarifier sludge, be mixed, adds 1000 grams of oyster shell, aeration culture 11 days under conditions of 25 DEG C.If ammonia nitrogen is reduced to zero
Continuous plus ammonium chloride, pH value is lower than 7.0 plus sodium carbonate is adjusted to provide.Ammonia nitrogen situation is detected with reagent colorimetric method, to judge to carry
Whether thallus generates and qualification；
C, carrier expands culture: will cultivate nitrifier carrier that is appropriate and taming and has washed away sludge, has mixed in oyster shell 1:3 ratio
Uniformly, bacterium cultural method expanding species is carried by carrier.
S2: primary wastewater is introduced into anaerobic pond, obtains secondary waste water；
S3: introducing aerobic tank for secondary waste water, is run in a manner of being aerated 2h, stopping being aerated 4h；Control oxygen content: 6mg/L obtains three
Grade waste water；
S4: three-level waste water is introduced sequentially into anoxic pond, aerobic tank, aerobic tank again, obtains level Four waste water；
S5: when COD concentration is down to 200~500mg/L and when ammonia nitrogen concentration is down to 10~30mg/L, level Four waste water is drawn in waste water
Into settling tank, 3.5h is settled, supernatant liquor is introduced into clarifier-tank.
Supernatant liquor is taken to be detected.
Embodiment 2
A kind of biological denitrification process of livestock breeding wastewater, comprising the following steps:
S0: pretreatment: waste water is introduced into physical processing unit, waste water is stirred, is filtered, primary wastewater is obtained；
S1: biological denitrificaion carrier is put into anoxic pond, dosage is every liter of waste water 2.5g；Oxygen content position 0.5mg/L is controlled, it is primary
Waste water enters anoxic pond, adjusts the PH to 8 of primary wastewater, and handle the time: 4h obtains primary wastewater, the biological denitrificaion carrier
Production method is as follows:
A, high-quality oyster shell and active carbon, granularity requirements 8mm sorting: are selected；Plastic carrier is by the respective powder of oyster shell and active carbon
Filamentous or velutinate carrier can be blended with plastics and be processed by being broken to；
B, carrier carries bacterium culture: with 2 liters with 2.0 grams of upper container chlorination ammonia, 1200 milliliters of ordinary water, and with sodium carbonate tune pH value 7.5,
Add 200 grams of clarifier sludge, be mixed, adds 1000 grams of oyster shell, aeration culture 13 days under conditions of 25 DEG C.If ammonia nitrogen is reduced to zero
Continuous plus ammonium chloride, pH value is lower than 7.0 plus sodium carbonate is adjusted to provide.Ammonia nitrogen situation is detected with reagent colorimetric method, to judge to carry
Whether thallus generates and qualification；
C, carrier expands culture: will cultivate nitrifier carrier that is appropriate and taming and has washed away sludge, has mixed in oyster shell 1:3 ratio
Uniformly, bacterium cultural method expanding species is carried by carrier.
S2: primary wastewater is introduced into anaerobic pond, obtains secondary waste water；
S3: introducing aerobic tank for secondary waste water, is run in a manner of being aerated 3h, stopping being aerated 6h；Control oxygen content: 8mg/L obtains three
Grade waste water；
S4: three-level waste water is introduced sequentially into anoxic pond, aerobic tank, aerobic tank again, obtains level Four waste water；
S5: when COD concentration is down to 200~500mg/L and when ammonia nitrogen concentration is down to 10~30mg/L, level Four waste water is drawn in waste water
Into settling tank, 5h is settled, supernatant liquor is introduced into clarifier-tank.
Supernatant liquor is taken to be detected, testing result is shown in Table 1.
Embodiment 3
A kind of biological denitrification process of livestock breeding wastewater, comprising the following steps:
S0: pretreatment: waste water is introduced into physical processing unit, waste water is stirred, is filtered, primary wastewater is obtained；
S1: biological denitrificaion carrier is put into anoxic pond, dosage is every liter of waste water 3g；Oxygen content position 0.5mg/L is controlled, primary is useless
Water enters anoxic pond, adjusts the PH to 9 of primary wastewater, and handle the time: 5h obtains primary wastewater, the life of the biological denitrificaion carrier
Production method is as follows:
A, high-quality oyster shell and active carbon, granularity requirements 4mm sorting: are selected；Plastic carrier is by the respective powder of oyster shell and active carbon
Filamentous or velutinate carrier can be blended with plastics and be processed by being broken to；
B, carrier carries bacterium culture: with 2 liters with 2.0 grams of upper container chlorination ammonia, 1200 milliliters of ordinary water, and with sodium carbonate tune pH value 7.5,
Add 200 grams of clarifier sludge, be mixed, adds 1000 grams of oyster shell, aeration culture 11 days under conditions of 25 DEG C.If ammonia nitrogen is reduced to zero
Continuous plus ammonium chloride, pH value is lower than 7.0 plus sodium carbonate is adjusted to provide.Ammonia nitrogen situation is detected with reagent colorimetric method, to judge to carry
Whether thallus generates and qualification；
C, carrier expands culture: will cultivate nitrifier carrier that is appropriate and taming and has washed away sludge, has mixed in oyster shell 1:3 ratio
Uniformly, bacterium cultural method expanding species is carried by carrier.
S2: primary wastewater is introduced into anaerobic pond, obtains secondary waste water；
S3: introducing aerobic tank for secondary waste water, is run in a manner of being aerated 3h, stopping being aerated 5h；Control oxygen content: 7mg/L obtains three
Grade waste water；
S4: three-level waste water is introduced sequentially into anoxic pond, aerobic tank, aerobic tank again, obtains level Four waste water；
S5: when COD concentration is down to 200~500mg/L and when ammonia nitrogen concentration is down to 10~30mg/L, level Four waste water is drawn in waste water
Into settling tank, 4h is settled, supernatant liquor is introduced into clarifier-tank.
Supernatant liquor is taken to be detected, testing result is shown in Table 1.
Embodiment 4
The present embodiment is made in embodiment 3 and being advanced optimized, while biological denitrificaion carrier is put into the specifically described step S1
Also put into oxygenolysis medicament；The oxygenolysis medicament is potassium ferrate, be added to concentration in sewage be 50~
100mg/L。
Supernatant liquor is taken to be detected, testing result is shown in Table 1.
Embodiment 5
The present embodiment is made in embodiment 3 and being advanced optimized, while biological denitrificaion carrier is put into the specifically described step S1
Also put into oxygenolysis medicament；The oxygenolysis medicament is ozone, and the concentration being added in sewage is 15~180mg/L.
Supernatant liquor is taken to be detected, testing result is shown in Table 1.
Embodiment 6
The present embodiment is made in embodiment 3 and being advanced optimized, while biological denitrificaion carrier is put into the specifically described step S1
Also put into oxygenolysis medicament；The oxygenolysis medicament is the mixing group of potassium ferrate and ozone, when potassium ferrate and ozone
When multi-step dosage, it is 50mg/L that potassium ferrate, which is added to the concentration in sewage, and it is 10mg/L that ozone, which is added to the concentration in sewage,.
Supernatant liquor is taken to be detected, testing result is shown in Table 1.
Comparative example
Using conventional A2O technique handle waste water, finally supernatant liquor is taken to be detected, testing result is shown in Table 1.
The sample detection result of 1 embodiment 1-6 of table and comparative example
| Sample | COD removal rate (%) | Ammonia nitrogen removal frank (%) | TN removal rate (%) | TP removal rate (%) |
| Embodiment 1 | 91.2 | 97.2 | 75.1 | 90.1 |
| Embodiment 2 | 92.3 | 96.9 | 79.1 | 89.4 |
| Embodiment 3 | 91.7 | 97.5 | 74.5 | 88.5 |
| Embodiment 4 | 95.1 | 98.7 | 80.2 | 92.5 |
| Embodiment 5 | 94.2 | 98.1 | 79.4 | 91.4 |
| Embodiment 6 | 94.6 | 97.5 | 81.2 | 90.5 |
| Comparative example | 82 | 86 | 56 | 70 |
From upper table, it can be seen that, the sample detection of embodiment 1-6, COD removal rate is above 91%, and wherein embodiment 4 is up to 95.1%；
Ammonia nitrogen removal frank is above 96%, and wherein embodiment 4 is up to 98.7%；TN removal rate is above 74%, and wherein embodiment 4 is up to
81.2%；TP removal rate is above 88%, and wherein embodiment 4 is up to 92.5%；And it is superior to comparative example, therefore, the present invention has excellent
Different clean-up effect.
Above-described embodiment only describes the optimal usage mode of existing equipment, and similar conventional machinery means is used to replace this reality
The element in example is applied, protection scope is each fallen within.
Claims (8)
1. a kind of biological denitrification process of livestock breeding wastewater, it is characterised in that: the following steps are included:
S0: pretreatment: waste water is introduced into physical processing unit, waste water is stirred, is filtered, primary wastewater is obtained；
S1: biological denitrificaion carrier is put into anoxic pond, control oxygen content: 0 < DO < 1.0mg/L, primary wastewater enter anoxic pond, adjust
The PH to 7-9 of primary wastewater is saved, handle the time: 3-5h obtains primary wastewater:；
S2: primary wastewater is introduced into anaerobic pond, obtains secondary waste water；
S3: secondary waste water is introduced into aerobic tank, control oxygen content: 5 < DO < 10mg/L obtains three-level waste water；
S4: three-level waste water is introduced sequentially into anoxic pond, aerobic tank, aerobic tank again, obtains level Four waste water；
S5: level Four waste water is introduced into settling tank, 3-5h is settled, supernatant liquor is introduced into clarifier-tank.
2. a kind of biological denitrification process of livestock breeding wastewater according to claim 1, it is characterised in that: the biology is de-
The production method of nitrogen carriers is carried out by following procedure:
A, high-quality oyster shell and active carbon, granularity requirements 3-8mm sorting: are selected；Plastic carrier be by oyster shell and active carbon respectively
Filamentous or velutinate carrier can be blended with plastics and be processed by being crushed to；
B, carrier carries bacterium culture: with 2 liters with 2.0 grams of upper container chlorination ammonia, 1200 milliliters of ordinary water, and with sodium carbonate tune pH value 7.5-
8.0, add 200 grams of clarifier sludge, be mixed, adds 1000 grams of oyster shell, aeration culture 10-15 days under conditions of 25-30 DEG C, if
Ammonia nitrogen is reduced to zero continuous plus ammonium chloride, and pH value is lower than 7.0 plus sodium carbonate is adjusted to provide, detects ammonia nitrogen shape with reagent colorimetric method
Whether condition is generated and qualified with judging to carry thallus；
C, carrier expands culture: will cultivate nitrifier carrier that is appropriate and taming and has washed away sludge, has mixed in oyster shell 1:3 ratio
Uniformly, bacterium cultural method expanding species is carried by carrier.
3. a kind of biological denitrification process of livestock breeding wastewater according to claim 1, it is characterised in that: the step S1
The dosage of middle biological denitrificaion carrier is every liter of 2~3g of waste water.
4. a kind of biological denitrification process of livestock breeding wastewater according to claim 3, it is characterised in that: the step S3
In by be aerated 1-3h, stop be aerated 3-6h in a manner of run.
5. a kind of biological denitrification process of livestock breeding wastewater according to claim 1, it is characterised in that: the step S5
In when COD concentration is down to 200~500mg/L in waste water and when ammonia nitrogen concentration is down to 10~30mg/L introduces settling tank.
6. a kind of biological denitrification process of livestock breeding wastewater according to claim 5, it is characterised in that: the step S1
In with biological denitrificaion carrier put into anoxic pond while also put into oxygenolysis medicament.
7. a kind of biological denitrification process of livestock breeding wastewater according to claim 6, it is characterised in that: the oxidation point
Solve the combination that medicament is one or both of potassium ferrate and ozone.
8. a kind of biological denitrification process of livestock breeding wastewater according to claim 7, it is characterised in that: work as potassium ferrate
It is 50~100mg/L that it, which is added to the concentration in sewage, when individually adding, and when ozone individually adds, it is added in sewage
Concentration be 15~180mg/L, when potassium ferrate and ozone multi-step dosage, potassium ferrate be added to the concentration in sewage be 20~
150mg/L, it is 1~20mg/L that ozone, which is added to the concentration in sewage,.
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| CN110255821A (en) * | 2019-06-26 | 2019-09-20 | 安徽建筑大学 | Ammonia nitrogen adsorption-based low-carbon-source sewage modified SBR biological nitrogen and phosphorus removal system and method |
| CN111039461A (en) * | 2019-12-30 | 2020-04-21 | 武汉理工大学 | A denitrogenation removes algae repair system for aquaculture water |
| CN112811733A (en) * | 2021-01-08 | 2021-05-18 | 罗洪湖 | Livestock breeding sewage treatment device and method |
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Application publication date: 20190621 |