CN108996685B - Recirculating aquaculture tail water treatment system based on novel fluidized bed biofilm method - Google Patents
Recirculating aquaculture tail water treatment system based on novel fluidized bed biofilm method Download PDFInfo
- Publication number
- CN108996685B CN108996685B CN201810787551.5A CN201810787551A CN108996685B CN 108996685 B CN108996685 B CN 108996685B CN 201810787551 A CN201810787551 A CN 201810787551A CN 108996685 B CN108996685 B CN 108996685B
- Authority
- CN
- China
- Prior art keywords
- water
- tank
- parts
- aerobic
- anaerobic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000009360 aquaculture Methods 0.000 title claims abstract description 23
- 244000144974 aquaculture Species 0.000 title claims abstract description 23
- 230000003134 recirculating effect Effects 0.000 title claims description 15
- 239000000945 filler Substances 0.000 claims description 60
- 238000004062 sedimentation Methods 0.000 claims description 28
- 239000010802 sludge Substances 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 18
- 229920002749 Bacterial cellulose Polymers 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 239000005016 bacterial cellulose Substances 0.000 claims description 16
- 230000014759 maintenance of location Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 12
- 241001148470 aerobic bacillus Species 0.000 claims description 11
- 238000005842 biochemical reaction Methods 0.000 claims description 10
- 241000195493 Cryptophyta Species 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 239000011362 coarse particle Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000000806 elastomer Substances 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- 235000021355 Stearic acid Nutrition 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 6
- 239000008117 stearic acid Substances 0.000 claims description 6
- 238000005273 aeration Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 241001148471 unidentified anaerobic bacterium Species 0.000 claims description 5
- 238000012258 culturing Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 235000002837 Acetobacter xylinum Nutrition 0.000 claims description 3
- 241001136169 Komagataeibacter xylinus Species 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000000855 fermentation Methods 0.000 claims description 3
- 230000004151 fermentation Effects 0.000 claims description 3
- 239000012452 mother liquor Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 241000251468 Actinopterygii Species 0.000 claims description 2
- 230000035800 maturation Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000013386 optimize process Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 12
- 229920000915 polyvinyl chloride Polymers 0.000 description 9
- 239000004800 polyvinyl chloride Substances 0.000 description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 8
- 238000010992 reflux Methods 0.000 description 7
- 241000894006 Bacteria Species 0.000 description 5
- 239000013049 sediment Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 3
- 230000001546 nitrifying effect Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- KIUKXJAPPMFGSW-DNGZLQJQSA-N (2S,3S,4S,5R,6R)-6-[(2S,3R,4R,5S,6R)-3-Acetamido-2-[(2S,3S,4R,5R,6R)-6-[(2R,3R,4R,5S,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-2-carboxy-4,5-dihydroxyoxan-3-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid Chemical compound CC(=O)N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O[C@H]2[C@@H]([C@@H](O[C@H]3[C@@H]([C@@H](O)[C@H](O)[C@H](O3)C(O)=O)O)[C@H](O)[C@@H](CO)O2)NC(C)=O)[C@@H](C(O)=O)O1 KIUKXJAPPMFGSW-DNGZLQJQSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 230000032770 biofilm formation Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229920002674 hyaluronan Polymers 0.000 description 1
- 229960003160 hyaluronic acid Drugs 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- 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)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention provides a circulating water aquaculture tail water treatment system based on a novel fluidized bed biofilm method. The invention provides a circulating water culture tail water treatment system based on a novel fluidized bed biomembrane method, which has an optimized process, can reduce the production cost and improve the water quality and efficiency of treated water.
Description
Technical Field
The invention relates to a recirculating aquaculture tail water treatment system, in particular to a recirculating aquaculture tail water treatment system based on a novel fluidized bed biofilm method.
Background
The circulating water culture system is a high-efficiency culture device and facility which realize the purification and the recycling of culture wastewater through physical (solid-liquid separation, foam separation, temperature regulation, gas-liquid mixing and the like), chemical (ozone disinfection and oxidation, ultraviolet disinfection, ion exchange, physicochemical adsorption and the like) and biological (various nitrification/denitrification biological filters, algae/macrophytes and the like) technical means, so that culture objects can always maintain the optimal physiological and ecological states under the high-density culture condition, thereby achieving the purposes of healthy and fast growth, maximally improving the yield and quality of unit water body and not generating internal and external environmental pollution. The circulating water aquaculture system can provide safe and reliable aquatic products with guaranteed quality, can also save water, save land, be environment-friendly and the like, and is considered as one of leading production modes of aquaculture development in the 21 st century. At present, most of recirculating aquaculture systems have the condition that tail water is discharged at one time after timing and periodic sewage discharge and the culture objects are captured, and a practical recirculating aquaculture tail water treatment system is needed for realizing totally-enclosed recirculating aquaculture, achieving real zero discharge, not polluting the surrounding environment and enhancing the competitiveness of recirculating aquaculture.
Ammonia nitrogen in the tail water of a recirculating aquaculture system is a main pollution source, and at present, the main removal methods for the ammonia nitrogen comprise physical adsorption, catalytic oxidation and biological pretreatment. Ammonia nitrogen is a polar molecule, common adsorbents such as activated carbon, zeolite, ceramsite and the like need to be modified, the adsorption effect is limited, the regeneration is needed when the ammonia nitrogen is saturated, the comprehensive treatment effect and the economy are more suitable for sudden pollution, and the ammonia nitrogen is not suitable for being used as a conventional treatment method; ammonia nitrogen is extremely stable in water, is difficult to oxidize by common oxidants, generally adopts catalytic oxidation, but has poor effect and extremely high operation cost; biological treatment is also a popular method because of its treatment effect and economy. The biological treatment is commonly carried out by an activated sludge method and a biofilm method.
MBBR (Moving Bed Biofilm Reactor) increases the specific surface area by adding a certain amount of suspended filler into a Reactor, improves the biomass and biological species in the Reactor, thereby improving the treatment efficiency of the Reactor, ensures that the suspended filler has specific gravity close to water and is close to the density of water before and after Biofilm formation, ensures that the suspended filler can suspend in water, has low fluidization power compared with a fluidized Bed process, can realize the complete fluidization of the filler by a small amount of aeration, and realizes high-efficiency treatment. The nature of the MBBR process is based on the principle of biofilm and operates in an activated sludge mode.
The biological filler is one of the cores of the biological wastewater treatment technology, and the hydrophilicity and the biological affinity of the biological filler directly influence the attachment and growth of microorganisms, thereby influencing the treatment effect of wastewater. At present, common biological fillers such as polyethylene, polyvinyl chloride and the like in the market have defects in the aspects of film forming speed, film forming amount and tightness between a film and the fillers due to poor hydrophilic performance and biological affinity, and proper substances are added into the biological fillers for blending modification, so that the mass transfer, film forming and water treatment performance of the fillers can be improved.
Disclosure of Invention
Aiming at the technical problems, the invention provides a circulating water aquaculture tail water treatment system based on a novel fluidized bed biomembrane method, which has an optimized process, can reduce the production cost and improve the water quality and efficiency of treated water.
The invention provides a circulating water aquaculture tail water treatment system based on a novel fluidized bed biofilm method, which is characterized in that aquaculture tail water sequentially passes through a primary sedimentation tank, a mixed culture water collecting tank, a filter tank, an anaerobic biochemical reactor, an aerobic biochemical reaction tank and a secondary sedimentation tank; the main body of the mixed culture pond is 6m deep in water and comprises aerobic bacteria, anaerobic bacteria and algae, and the water outlet is positioned in the middle of the main body in water depth; after coarse particles are filtered by the filter tank, 1/5 water is shunted to the aerobic reaction tank to improve the content of aerobic bacteria, and the rest water enters the anaerobic biochemical reactor; anaerobic biological fillers are added into the anaerobic biochemical reactor, and are firstly immersed into a place with the water depth of 4-6 meters in the mixed culture pond for culture for 1-2 days; adding aerobic biological filler into the aerobic biochemical reaction tank, and immersing the aerobic biological filler into a position with the depth of 0.2-1 m in the mixed culture tank for culture for 1-2 days; the biological filler comprises, by mass, 4-6 parts of polyvinyl alcohol, 2-4 parts of stearic acid, 0.5-1.5 parts of polyacrylamide, 1-3 parts of activated carbon, 66.5-79.5 parts of PVC (polyvinyl chloride) elastomer and 5-10 parts of bacterial cellulose.
Further, the bottom sediment mud of mixing one sedimentation tank, mixed culture water collecting tank and filtering ponds can be collected and then mixed with activated sludge according to the ratio of 1: 1-5, and putting the mixture into an anaerobic biochemical reactor to enhance the treatment effect.
Further, the algae in the mixed culture water collecting pond can be used as bait for fish in a culture system.
Furthermore, the hydraulic retention time of the mixed culture water collecting tank is 16-18 h.
Further, the sludge discharged from the secondary sedimentation tank completely flows back to the primary sedimentation tank, and the sludge reflux ratio is 100%.
Further, the specific surface area of the biological filler is more than 500m2/m3The filler is cylindrical, the specific gravity of the filler before film forming is 0.93-0.97, the porosity is more than or equal to 90%, and the filling rate of the filler is 20-55%.
Further, the biological filler comprises, by mass, 5 parts of polyvinyl alcohol, 3 parts of stearic acid, 1 part of polyacrylamide, 2 parts of activated carbon, 73 parts of PVC (polyvinyl chloride) elastomer and 8 parts of bacterial cellulose
Further, the average diameter of the fiber bundle of the bacterial cellulose is 40-60nm, and the average diameter of the single fiber is 4-10 nm.
Further, the preparation method of the bacterial cellulose comprises the steps of inoculating acetobacter xylinum into the fermentation mother liquor, culturing for 2-6 days in an aerated mode, culturing for 2-6 days in a static mode, filtering, drying, adding 1-5% NaOH solution, washing and filtering.
Advantageous effects of the invention
The invention provides a circulating water culture tail water treatment system based on a novel fluidized bed biomembrane method, compared with the prior art, the invention has the following advantages:
(1) the aerobic bacteria are usually nitrifying bacteria, the nitrifying bacteria are autotrophic bacteria, and the growth and propagation period is long, so that in order to ensure sufficient biomass in the biological tank, after coarse particles are filtered by the filter tank, 1/5 water is shunted to the aerobic reaction tank to improve the content of the nitrifying bacteria, and the treatment efficiency is improved;
(2) the anaerobic biological filler and the aerobic biological filler are immersed into different water depths for pre-culture, and in the mixed culture water collecting tank, because the water velocity is poor, the film formation and maturation rates are improved, and the treatment efficiency can be improved during the reaction of the anaerobic tank and the aerobic tank;
(3) the biological filler disclosed by the invention is added with a certain amount of bacterial cellulose besides conventional polymers, the nano-size of the bacterial cellulose is utilized to accelerate the film forming efficiency, and the bacterial cellulose has better affinity with other active bacteria, so that the treatment efficiency is further improved;
(4) the sediment can be used as one of the components of the activated sludge, is rich in abundant microorganisms, and can improve the activity of the sludge; meanwhile, the algae is utilized to pretreat the water quality, so that the oxygen content is increased, the algae can be recycled, and the overall production cost is reduced.
Drawings
FIG. 1 is a flow chart of a recirculating aquaculture tail water treatment system based on a novel fluidized bed biofilm method.
Detailed Description
In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.
Preparation method of bacterial cellulose
100mL of fermentation mother liquor with 10% of carbohydrate content is inoculated with 15% of acetobacter xylinum, aerated culture is carried out for 2-6 days, static culture is carried out for 2-6 days, and after filtration and drying, 1-5% of NaOH solution is added for washing and filtration.
Example 1
Circulating water sequentially passes through a primary sedimentation tank, a mixed culture water collecting tank, a filtering tank, an anaerobic biochemical reactor, an aerobic biochemical reaction tank and a secondary sedimentation tank; the main body of the mixed culture pond is 6m deep in water and contains aerobic bacteria, anaerobic bacteria and algaeThe water outlet is positioned in the middle of the water depth of the main body; after coarse particles are filtered by the filter tank, 1/5 water is shunted to the aerobic reaction tank to improve the content of aerobic bacteria, and the rest water enters the anaerobic biochemical reactor; anaerobic biological fillers are added into the anaerobic biochemical reactor, and are firstly immersed into a place with the water depth of 4-6 meters in the mixed culture pond for culture for 1-2 days; adding aerobic biological filler into the aerobic biochemical reaction tank, and immersing the aerobic biological filler into a position with the depth of 0.2-1 m in the mixed culture tank for culture for 1-2 days; the biological filler comprises, by mass, 5 parts of polyvinyl alcohol, 3 parts of stearic acid, 1 part of polyacrylamide, 2 parts of activated carbon, 73 parts of PVC elastomer and 8 parts of bacterial cellulose. The bottom sediment mud of mixed culture catch basin and filtering ponds can collect the back and follow activated sludge according to 1: 3, and putting the mixture into an anaerobic biochemical reactor to enhance the treatment effect. And (3) completely refluxing the sludge discharged from the secondary sedimentation tank to the primary sedimentation tank, wherein the sludge reflux ratio is 100%. The specific surface area of the biological filler is more than 500m2/m3The filler is cylindrical, the specific gravity of the filler before film forming is 0.93-0.97, the porosity is more than or equal to 90%, and the filling rate of the filler is 30%. The hydraulic retention time of the mixed culture water collecting tank is 16-18 h; the hydraulic retention time of the anaerobic tank is 2 hours; the retention time of the aerobic tank is 8 hours, and DO is maintained at 3.5mg/L through blast aeration; the retention time of the secondary sedimentation tank is 2.5 h.
Example 2
Circulating water sequentially passes through a primary sedimentation tank, a mixed culture water collecting tank, a filtering tank, an anaerobic biochemical reactor, an aerobic biochemical reaction tank and a secondary sedimentation tank; the main body of the mixed culture pond is 6m deep in water and comprises aerobic bacteria, anaerobic bacteria and algae, and the water outlet is positioned in the middle of the main body in water depth; after coarse particles are filtered by the filter tank, 1/5 water is shunted to the aerobic reaction tank to improve the content of aerobic bacteria, and the rest water enters the anaerobic biochemical reactor; anaerobic biological fillers are added into the anaerobic biochemical reactor, and are firstly immersed into a place with the water depth of 4-6 meters in the mixed culture pond for culture for 1-2 days; adding aerobic biological filler into the aerobic biochemical reaction tank, and immersing the aerobic biological filler into a position with the depth of 0.2-1 m in the mixed culture tank for culture for 1-2 days; the biological filler comprises 4 parts by mass of polyvinyl alcohol and is hard2 parts of hyaluronic acid, 0.5 part of polyacrylamide, 1 part of activated carbon, 66.5 parts of PVC elastomer and 10 parts of bacterial cellulose. The bottom sediment mud of mixed culture catch basin and filtering ponds can collect the back and follow activated sludge according to 1: 1, and putting the mixture into an anaerobic biochemical reactor to enhance the treatment effect. And (3) completely refluxing the sludge discharged from the secondary sedimentation tank to the primary sedimentation tank, wherein the sludge reflux ratio is 100%. The specific surface area of the biological filler is more than 500m2/m3The filler is cylindrical, the specific gravity of the filler before film forming is 0.93-0.97, the porosity is more than or equal to 90%, and the filling rate of the filler is 30%. The hydraulic retention time of the mixed culture water collecting tank is 16-18 h; the hydraulic retention time of the anaerobic tank is 2 hours; the retention time of the aerobic tank is 8 hours, and DO is maintained at 3.5mg/L through blast aeration; the retention time of the secondary sedimentation tank is 2.5 h.
Example 3
Circulating water sequentially passes through a primary sedimentation tank, a mixed culture water collecting tank, a filtering tank, an anaerobic biochemical reactor, an aerobic biochemical reaction tank and a secondary sedimentation tank; the main body of the mixed culture pond is 6m deep in water and comprises aerobic bacteria, anaerobic bacteria and algae, and the water outlet is positioned in the middle of the main body in water depth; after coarse particles are filtered by the filter tank, 1/5 water is shunted to the aerobic reaction tank to improve the content of aerobic bacteria, and the rest water enters the anaerobic biochemical reactor; anaerobic biological fillers are added into the anaerobic biochemical reactor, and are firstly immersed into a place with the water depth of 4-6 meters in the mixed culture pond for culture for 1-2 days; adding aerobic biological filler into the aerobic biochemical reaction tank, and immersing the aerobic biological filler into a position with the depth of 0.2-1 m in the mixed culture tank for culture for 1-2 days; the biological filler comprises, by mass, 6 parts of polyvinyl alcohol, 2 parts of stearic acid, 1.5 parts of polyacrylamide, 1 part of activated carbon, 79.5 parts of PVC (polyvinyl chloride) elastomer and 5 parts of bacterial cellulose. The bottom sediment mud of mixed culture catch basin and filtering ponds can collect the back and follow activated sludge according to 1: 5, and putting the mixture into an anaerobic biochemical reactor to enhance the treatment effect. And (3) completely refluxing the sludge discharged from the secondary sedimentation tank to the primary sedimentation tank, wherein the sludge reflux ratio is 100%. The specific surface area of the biological filler is more than 500m2/m3The filler is cylindrical, the specific gravity of the filler before film forming is 0.93-0.97, the porosity is more than or equal to 90%, and the filling rate of the filler is 30%. MixingThe hydraulic retention time of the culture water collecting tank is 16-18 h; the hydraulic retention time of the anaerobic tank is 2 hours; the retention time of the aerobic tank is 8 hours, and DO is maintained at 3.5mg/L through blast aeration; the retention time of the secondary sedimentation tank is 2.5 h.
Comparative example 1
The process was essentially the same as in example 1 except that after coarse particles were filtered in the filtration tank, no water was diverted to the aerobic reaction tank.
Comparative example 2
The process is essentially the same as in example 1 except that the anaerobic biological filler is not first submerged in the mixed culture sump.
Comparative example 3
The process is essentially the same as that of example 1, except that the aerobic biological filler is not first immersed in the mixed culture sump.
Comparative example 4
Essentially the same procedure as in example 1, except that the biological filler is not added with bacterial cellulose.
Comparative example 5
The process was substantially the same as that of example 1 except that the bottom sludge of the mixed culture water-collecting tank and the filtration tank was not added to the anaerobic tank.
Comparative example 6
Adopts the traditional process and sequentially passes through a primary sedimentation tank, a filtering tank, an anaerobic tank, an aerobic tank and a secondary sedimentation tank.
Collecting 100ml of sample water at the water outlet of the secondary sedimentation tank for detecting CODMnAnd the concentration of ammonia nitrogen.
| CODMn(mg/L) | Ammonia nitrogen concentration (mg/L) | Amount of treated Water (L/h) | |
| Example 1 | 12.2 | 0.83 | 180 |
| Example 2 | 13.6 | 0.91 | 180 |
| Example 3 | 13.8 | 0.95 | 180 |
| Comparative example 1 | 24.3 | 1.7 | 120 |
| Comparative example 2 | 27.5 | 1.8 | 120 |
| Comparative example 3 | 26.3 | 2.1 | 120 |
| Comparative example 4 | 27.0 | 1.8 | 120 |
| Comparative example 5 | 22.8 | 1.6 | 120 |
| Comparative example 6 | 30.2 | 2.6 | 100 |
The invention provides a circulating water culture tail water treatment system based on a novel fluidized bed biomembrane method, which has an optimized process, can reduce the production cost and improve the water quality and efficiency of treated water.
Claims (7)
1. A recirculating aquaculture tail water treatment system based on a fluidized bed biofilm process is characterized in that aquaculture tail water sequentially passes through a primary sedimentation tank, a mixed culture water collecting tank, a filtering tank, an anaerobic biochemical reactor, an aerobic biochemical reaction tank and a secondary sedimentation tank; the main body of the mixed culture pond is 6m deep in water and comprises aerobic bacteria, anaerobic bacteria and algae, and the water outlet is positioned in the middle of the main body in water depth; after coarse particles are filtered by the filter tank, 1/5 water is shunted to the aerobic reaction tank to improve the content of aerobic bacteria, and the rest water enters the anaerobic biochemical reactor; anaerobic biological fillers are added into the anaerobic biochemical reactor, and are firstly immersed into a place with the water depth of 4-6 meters in the mixed culture pond for culture for 1-2 days; adding aerobic biological filler into the aerobic biochemical reaction tank, and immersing the aerobic biological filler into a position with the depth of 0.2-1 m in the mixed culture tank for culture for 1-2 days; the biological filler comprises, by mass, 4-6 parts of polyvinyl alcohol, 2-4 parts of stearic acid, 0.5-1.5 parts of polyacrylamide, 1-3 parts of activated carbon, 66.5-79.5 parts of PVC elastomer and 5-10 parts of bacterial cellulose;
the average diameter of the fiber bundle of the bacterial cellulose is 40-60nm, and the average diameter of a single fiber is 4-10 nm;
the anaerobic biological filler and the aerobic biological filler are immersed into different water depths for pre-culture, and in a mixed culture water collecting tank, because the water velocity is poor, the film formation and maturation rates are improved, and the treatment efficiency can be improved during the reaction of the anaerobic tank and the aerobic tank;
the bottom of the primary sedimentation tank, the mixed culture water collecting tank and the filtering tank is precipitated and mud is collected and then mixed with activated sludge according to the proportion of 1: 1-5, and putting the mixture into an anaerobic biochemical reactor to enhance the treatment effect.
2. The system for treating recirculating aquaculture tail water based on the fluidized-bed biofilm method as recited in claim 1, wherein the algae in the mixed culture water collecting tank is used as a bait for fish in the aquaculture system.
3. The system for treating the tail water of the recirculating aquaculture based on the fluidized bed biofilm method as recited in claim 1, wherein the hydraulic retention time of the mixed culture water collecting tank is 16-18 h.
4. The system of claim 1, wherein the sludge discharged from the secondary sedimentation tank is totally returned to the primary sedimentation tank, and the sludge return ratio is 100%.
5. The system for treating recirculating aquaculture tail water based on the fluidized bed biofilm method as recited in claim 1, wherein the specific surface area of the biological filler is more than 500m2/m3The filler is cylindrical, the specific gravity of the filler before film formation is 0.93-0.97, the porosity is more than or equal to 90%, and the filling rate of the filler is 20-55%.
6. The tail water treatment system for recirculating aquaculture based on the fluidized bed biofilm method of claim 1, wherein the biological filler comprises, by mass, 5 parts of polyvinyl alcohol, 3 parts of stearic acid, 1 part of polyacrylamide, 2 parts of activated carbon, 73 parts of PVC elastomer and 8 parts of bacterial cellulose.
7. The system of claim 1, wherein the bacterial cellulose is prepared by inoculating acetobacter xylinum into fermentation mother liquor, culturing for 2-6 days in an aeration manner, culturing for 2-6 days in a static state, filtering, drying, adding 1-5% NaOH solution, washing, and filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787551.5A CN108996685B (en) | 2018-07-17 | 2018-07-17 | Recirculating aquaculture tail water treatment system based on novel fluidized bed biofilm method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787551.5A CN108996685B (en) | 2018-07-17 | 2018-07-17 | Recirculating aquaculture tail water treatment system based on novel fluidized bed biofilm method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108996685A CN108996685A (en) | 2018-12-14 |
| CN108996685B true CN108996685B (en) | 2021-07-30 |
Family
ID=64599814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810787551.5A Expired - Fee Related CN108996685B (en) | 2018-07-17 | 2018-07-17 | Recirculating aquaculture tail water treatment system based on novel fluidized bed biofilm method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108996685B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628758A (en) * | 2009-08-04 | 2010-01-20 | 中国人民解放军后勤工程学院 | Modified PVC biologic filler |
| CN201971706U (en) * | 2011-01-30 | 2011-09-14 | 西安惠宁纸业有限公司 | Processing system for paper making wastewater |
| CN103408129A (en) * | 2013-08-19 | 2013-11-27 | 中国水产科学研究院渔业机械仪器研究所 | Degradable bio-compatible water treatment filler and preparation method thereof |
| EP2692701A1 (en) * | 2012-07-31 | 2014-02-05 | Gabriel Marius Rus | Process and plant for wastewater treatment and energy generation |
| CN104291444A (en) * | 2014-11-10 | 2015-01-21 | 重庆赋洁环保工程有限公司 | System and method for treatment of contact hydrolysis-algae micro-aeration composite wastewater |
-
2018
- 2018-07-17 CN CN201810787551.5A patent/CN108996685B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628758A (en) * | 2009-08-04 | 2010-01-20 | 中国人民解放军后勤工程学院 | Modified PVC biologic filler |
| CN201971706U (en) * | 2011-01-30 | 2011-09-14 | 西安惠宁纸业有限公司 | Processing system for paper making wastewater |
| EP2692701A1 (en) * | 2012-07-31 | 2014-02-05 | Gabriel Marius Rus | Process and plant for wastewater treatment and energy generation |
| CN103408129A (en) * | 2013-08-19 | 2013-11-27 | 中国水产科学研究院渔业机械仪器研究所 | Degradable bio-compatible water treatment filler and preparation method thereof |
| CN104291444A (en) * | 2014-11-10 | 2015-01-21 | 重庆赋洁环保工程有限公司 | System and method for treatment of contact hydrolysis-algae micro-aeration composite wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108996685A (en) | 2018-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105236564B (en) | A kind of BAF combined stuffing and application | |
| CN103833129B (en) | Denitrification filtering cloth filtering pool | |
| CN111470627A (en) | Denitrification treatment process for livestock breeding wastewater with high ammonia nitrogen and low carbon nitrogen ratio | |
| CN214060278U (en) | Mariculture tail water discharging device | |
| CN113772900A (en) | Efficient nitrogen and phosphorus removal process system for mariculture tail water treatment | |
| CN111422976A (en) | Process for treating high ammonia nitrogen wastewater by using moving bed biofilm reactor | |
| CN101781056B (en) | Treatment method of waste papermaking water | |
| CN105084536A (en) | Biologically enhanced treatment method for medium-and-low concentration ammonia-nitrogen wastewater | |
| CA2348520C (en) | Nitrification process | |
| CN107963719A (en) | A kind of processing unit and method of high concentration rhodanate waste water | |
| CN104163497B (en) | A kind of low dissolved oxygen magnetic biochemical treatment system and technique | |
| CN106064851B (en) | A kind of MLE-MBR method efficient process marine culture wastewater method | |
| CN115838210B (en) | Pure biological membrane/A3 AO mud membrane combined double-mode sewage treatment system and operation method thereof | |
| CN219079234U (en) | Advanced ammonia nitrogen removal system utilizing secondary sedimentation tank coupled biological membrane | |
| CN111675424A (en) | Sewage treatment process with MBBR | |
| CN111153551A (en) | Municipal sewage treatment device and treatment process | |
| CN204079731U (en) | Creeping bed | |
| CN108996685B (en) | Recirculating aquaculture tail water treatment system based on novel fluidized bed biofilm method | |
| CN1105085C (en) | Single-tank sewage treatment plant | |
| CN110862151A (en) | Waste water denitrification device based on microorganism carrier gel | |
| CN109368934A (en) | A kind of waste water autotrophic denitrification nitrogen rejection facility and wastewater treatment method | |
| CN221680931U (en) | Advanced treatment system for biochemical tail water RO concentrated water in petrochemical industry | |
| CN216687837U (en) | Can reach breed effluent disposal system of III types of water standards of surface water | |
| CN220618690U (en) | Aquaculture tail water treatment device | |
| CN210795899U (en) | Biomembrane process purifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210730 |