CN110282831B - Device and method for treating sewage by coupling bacterial and algal symbiotic photo-bioreactor with artificial wetland - Google Patents
Device and method for treating sewage by coupling bacterial and algal symbiotic photo-bioreactor with artificial wetland Download PDFInfo
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- CN110282831B CN110282831B CN201910627922.8A CN201910627922A CN110282831B CN 110282831 B CN110282831 B CN 110282831B CN 201910627922 A CN201910627922 A CN 201910627922A CN 110282831 B CN110282831 B CN 110282831B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000010865 sewage Substances 0.000 title claims abstract description 9
- 230000001580 bacterial effect Effects 0.000 title claims abstract description 7
- 230000008878 coupling Effects 0.000 title abstract description 6
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- 238000009360 aquaculture Methods 0.000 claims abstract description 26
- 244000144974 aquaculture Species 0.000 claims abstract description 26
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000005273 aeration Methods 0.000 claims abstract description 23
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 17
- 238000005192 partition Methods 0.000 claims description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 13
- 241000195493 Cryptophyta Species 0.000 claims description 11
- 241000196324 Embryophyta Species 0.000 claims description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims description 10
- 239000011574 phosphorus Substances 0.000 claims description 10
- 241000894006 Bacteria Species 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
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- 235000015097 nutrients Nutrition 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000010902 straw Substances 0.000 claims description 6
- 238000000108 ultra-filtration Methods 0.000 claims description 6
- 241000233866 Fungi Species 0.000 claims description 5
- 235000015099 wheat brans Nutrition 0.000 claims description 5
- 241000186000 Bifidobacterium Species 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 4
- 230000001546 nitrifying effect Effects 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- 244000205574 Acorus calamus Species 0.000 claims description 3
- 241000209134 Arundinaria Species 0.000 claims description 3
- 235000011996 Calamus deerratus Nutrition 0.000 claims description 3
- 235000005273 Canna coccinea Nutrition 0.000 claims description 3
- 240000008555 Canna flaccida Species 0.000 claims description 3
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 3
- 241000195649 Chlorella <Chlorellales> Species 0.000 claims description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 3
- 241000209046 Pennisetum Species 0.000 claims description 3
- 239000001888 Peptone Substances 0.000 claims description 3
- 108010080698 Peptones Proteins 0.000 claims description 3
- 235000014676 Phragmites communis Nutrition 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 241001509286 Thiobacillus denitrificans Species 0.000 claims description 3
- 229920002301 cellulose acetate Polymers 0.000 claims description 3
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 3
- NHSCRWJPZDNMBU-UHFFFAOYSA-L dipotassium carbonic acid carbonate Chemical compound [K+].[K+].OC([O-])=O.OC([O-])=O NHSCRWJPZDNMBU-UHFFFAOYSA-L 0.000 claims description 3
- 239000008103 glucose Substances 0.000 claims description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 3
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 3
- 235000019319 peptone Nutrition 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 230000001954 sterilising effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
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- 238000005086 pumping Methods 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 claims 1
- 239000002351 wastewater Substances 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 7
- 241001465754 Metazoa Species 0.000 description 5
- 241000251468 Actinopterygii Species 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 102000001554 Hemoglobins Human genes 0.000 description 2
- 108010054147 Hemoglobins Proteins 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
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- 238000011161 development Methods 0.000 description 2
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- 229910052760 oxygen Inorganic materials 0.000 description 2
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- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 241000238557 Decapoda Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 241000605118 Thiobacillus Species 0.000 description 1
- 230000005791 algae growth Effects 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
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- 239000013505 freshwater Substances 0.000 description 1
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- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- -1 organic matters Chemical compound 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Farming Of Fish And Shellfish (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to a sewage treatment device and a sewage treatment method of a joint constructed wetland by coupling a bacterial and algal symbiotic photo-bioreactor. The device comprises a water inlet tank, a photo-bioreactor and an artificial wetland; the water inlet tank is connected with the photo-bioreactor through a water inlet pipe, a water inlet pump is arranged on the water inlet pipe, an inner cylinder is arranged in the middle of the photo-bioreactor, and the photo-bioreactor is connected with the constructed wetland through a water outlet pipe; the constructed wetland is provided with a water inlet baffle plate, and is divided into a wetland treatment unit, an ozone disinfection unit and a membrane treatment unit through the baffle plate. The method comprises the following steps: the wastewater to be treated sequentially passes through a photo-bioreactor and an artificial wetland, a light source and an aeration fan are started in the reaction process, and the wastewater is treated by the photo-bioreactor, a wetland treatment unit, an ozone disinfection unit and a membrane treatment unit and then is discharged or recycled after reaching the standard. The invention adopts the photo-bioreactor to couple the artificial wetland to treat the aquaculture tail water and adopts the PLC to integrally control, thereby solving the problem of treating the wastewater.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a sewage treatment device with a coupling of a bacterial and algal symbiotic photo-bioreactor and an artificial wetland and a treatment method thereof.
Background
Aquaculture is the most important component in freshwater aquaculture in China, and is influenced by inherent factors such as water resource, land area deficiency and the like, multiple factors such as poor aquaculture infrastructure, heavy environmental pollution, productivity reduction and the like, and particularly, with the rapid development of an intensive aquaculture mode, the sustainable development of the aquaculture industry is directly restricted by water quality deterioration and wastewater discharge. In the cultivation process, the bait is discharged, the residual bait is decomposed, excrement is generated, chemicals, antibiotics and the like are used, so that the nutrient substances, organic chips and the like in the water body are seriously out of standard, the ecological system of the cultivation water area is unbalanced, diseases are bred, and the deterioration degree of the water body environment is aggravated. The direct utilization or recycling of the culture water body has great harm to fishes, and the culture water body can be used as the culture water after being treated. The main pollutants in the aquaculture tail water include ammonia nitrogen, nitrite, organic matters, phosphorus and the like, wherein the ammonia nitrogen is excrement of aquatic animals, is also a final product of decomposition of nitrogen-containing organic matters such as residual baits, feces, animal and plant carcasses and the like, is easy to cause water deterioration and is toxic to cultured animals. Nitrite has strong toxicity to fish, and its existence can lead ferrous hemoglobin in the blood of fish and shrimp to be oxidized into ferric ferrous hemoglobin, and the latter can not carry oxygen, thus inhibiting the oxygen carrying capacity of the blood, resulting in hypoxia, reduced feeding capacity of aquatic animals and even death. The organic matters are mainly produced by decomposing residual baits, metabolites of plankton and excreta of cultured animals, and the high content of the organic matters often causes water deterioration, so that the fishes grow slowly and even sink or die.
At present, a large number of researchers at home and abroad have carried out a great deal of researches and applications on the aquaculture tail water treatment technology, and some farms can utilize biological balls or filters and the like to filter and treat the tail water, but the mode can only filter large-particle impurities in the tail water, so that the pollution removal purpose can not be achieved; a few farms can use equipment such as a protein separator to purify tail water, however, the tail water is usually discharged directly after passing through a plurality of purifying equipment in turn, and more toxic and harmful substances still exist in the treated tail water, so that the environment is polluted greatly.
Disclosure of Invention
In view of the above, the invention provides a device and a corresponding treatment method suitable for aquaculture tail water treatment, aiming at the problems of incomplete treatment and poor treatment effect of the aquaculture tail water in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The utility model provides a joint constructed wetland sewage treatment plant of fungus and algae intergrowth photobioreactor which characterized in that: comprises a water inlet tank, a photo-bioreactor and an artificial wetland; the water inlet tank is connected with the photo-bioreactor through a water inlet pipe, the water inlet pipe is provided with a water inlet pump, the middle part of the photo-bioreactor is provided with an inner cylinder, an arch-shaped partition board is arranged in the inner cylinder, a plurality of aeration heads are arranged in the arch-shaped partition board, a plurality of light sources are also arranged in the arch-shaped partition board, the inner cylinder is filled with a bacterial and algal symbiont, an overflow weir is arranged above the photo-bioreactor, and the photo-bioreactor is connected with the artificial wetland through a water outlet pipe; the constructed wetland is provided with a water inlet baffle plate, and is divided into a wetland treatment unit, an ozone disinfection unit and a membrane treatment unit through the baffle plate.
Optionally, gaps are reserved between the transverse partition plates and the longitudinal partition plates of the arched partition plates, the light sources are arranged at the gaps between the transverse partition plates and the longitudinal partition plates, the light sources are incandescent lamps or fluorescent lamps, the illumination intensity is between 3000 and 10000lx, and the photobioreactor is also provided with a pH meter and a temperature detector.
Optionally, the wetland treatment unit is a coarse filtration layer, a matrix layer, a fine sand layer and a plant layer from bottom to top in sequence, the coarse filtration layer is mixed with the ceramsite by adopting gravel, and the mixing volume ratio is that the gravel: the ceramsite is 3:1, the substrate layer adopts straw and active carbon, and the mixing volume ratio of the straw is as follows: the active carbon is 2-3:1, and the plant layer is one or more selected from canna, calamus, pennisetum, cane shoot and reed.
Optionally, the treatment device is further provided with a PLC control system, the PLC control system is used for controlling the start and stop of water inlet and outlet, light source control, aeration control, ozone generating device and membrane treatment unit of the system, and the aeration heads are connected with the aeration fan through the aeration pipeline.
Optionally, an ozone generating device is arranged in the ozone sterilizing unit, an ultrafiltration membrane is arranged in the membrane processing unit, the ultrafiltration membrane is made of one of polyvinyl chloride, polystyrene or cellulose acetate, the pore diameter of the membrane is 0.1-0.3 mu m, and the aperture ratio of the membrane silk is 80% -95%.
The invention also discloses a method for treating the aquaculture tail water by using the device, the aquaculture tail water to be treated is pumped into the photobioreactor through the water inlet pump, the temperature in the photobioreactor is controlled to be 18-25 ℃ through the pH meter and the temperature detector, the pH value is 6-7, the domesticated algae symbionts are added into the photobioreactor, a plurality of light sources in the photobioreactor are started, the aeration fan is started to treat the aquaculture tail water for 8-14 hours, the treated supernatant overflows to enter the artificial wetland for continuous treatment, the bottom of the water inlet baffle plate enters the bottom of the wetland treatment unit, the wastewater sequentially passes through the coarse filtration layer, the matrix layer, the fine sand layer and the plant layer for treatment, the treatment time is 1-5 hours, the effluent enters the ozone disinfection unit for disinfection treatment, and then enters the membrane treatment unit for treatment and is discharged or recycled after reaching standards.
Optionally, the preparation process of the mycophyte is as follows: separating and screening a composite strain of thiobacillus denitrificans, nitrifying bacteria, phosphorus accumulating bacteria and bifidobacterium, carrying out enrichment culture, mixing and stirring the composite strain and a carrier, wherein the carrier is wheat bran and modified diatomite, and the mass ratio of the mixed strain to the carrier is 1:3-10, adding nutrient solution into the carrier for mixing treatment to obtain a loaded thallus carrier, and adding the loaded thallus carrier and chlorella into a photobioreactor according to the mass ratio of 5:1 to obtain the mycorrhizal symbiont.
Optionally, the modified diatomite is diatomite modified by a surfactant cetyl trimethyl ammonium bromide.
Optionally, the nutrient solution comprises 1000mg/L of glucose, 225mg/L of peptone, 268mg/L of potassium chloride, 58mg/L of magnesium sulfate, 100mg/L of dipotassium bicarbonate, 20mg/L of copper sulfate and 120mg/L of sodium bicarbonate.
Optionally, the treatment time of the ozone disinfection unit is 3-30 minutes, and the treatment time of the membrane treatment unit is 10-40 minutes.
Compared with the prior art, the invention can obtain the following technical effects:
1) The invention adopts the fungus and algae symbiotic photo-bioreactor to process the aquaculture tail water by coupling with the artificial wetland, fully utilizes the fungus and algae in the photo-bioreactor and the purification effect of the artificial wetland, integrates biological processing and physical processing, and can efficiently process the aquaculture tail water; the reactor is simple and convenient to operate, and the problem of treatment of the waste water is solved by adopting PLC integrated control.
2) The bow-shaped partition plates are adopted in the fungus and algae symbiotic photo-bioreactor, and the light source is arranged at the gap where the longitudinal partition plates and the transverse partition plates meet, so that illumination is more uniform, algae growth is facilitated, a plurality of aeration heads are arranged at the center of the bow-shaped partition plates, aeration is more uniform, bacteria reproduction is facilitated, the setting of the bow-shaped partition plates is matched with the aeration of the plurality of aeration heads, circulation is formed inside the photo-bioreactor, circulation of water is facilitated, and therefore the treatment effect of the photo-bioreactor can be effectively enhanced.
3) According to the water quality characteristics of the aquaculture tail water, proper strains are screened out through a large number of tedious work, composite strains consisting of thiobacillus azotemmaensis, nitrifying bacteria, phosphorus accumulating bacteria and bifidobacteria are adopted, corresponding load carriers are selected, and meanwhile, proper proportions of the strains and algae are correspondingly selected according to the internal structure of the photobioreactor, so that the treatment efficiency is high, and the treatment effect is good.
4) Compared with the conventional artificial wetland treatment process, the artificial wetland unit is added with the corresponding ozone disinfection unit and the corresponding membrane treatment unit aiming at the water quality characteristics of the aquaculture tail water, so that microorganisms, germs and the like in the tail water are disinfected, and meanwhile malodor is reduced, and the treated water can reach the emission standard or be recycled.
Drawings
FIG. 1 is a schematic diagram of a sewage treatment device with a coupling artificial wetland for a zoobiotic photo-bioreactor. In the figure, 1 is a water inlet tank, 2 is a water inlet pump, 3 is a water inlet pipe, 4 is a photobioreactor, 5 is an inner cylinder, 6 is a light source, 7 is an arch-shaped partition board, 8 is an overflow weir, 9 is a water outlet pipe, 10 is a algae symbiont, 11 is a PLC control system, 12 is an artificial wetland, 13 is a water inlet partition board, 14 is a wetland treatment unit, 15 is an ozone disinfection unit, 16 is a membrane treatment unit, 17 is a coarse filtration layer, 18 is a matrix layer, 19 is a fine sand layer, and 20 is a plant layer.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
Example 1
As shown in figure 1, the sewage treatment device of the artificial wetland is coupled with a zoobiotic photo-bioreactor, and comprises a water inlet tank (1), a photo-bioreactor (4) and an artificial wetland (12); the water inlet tank (1) is connected with the photo-bioreactor (4) through the water inlet pipe (3), the water inlet pipe (3) is provided with the water inlet pump (2), the middle part of the photo-bioreactor (4) is provided with the inner cylinder (5), the inner cylinder (5) is provided with the arch-shaped partition board (7), the inside of the arch-shaped partition board (7) is provided with a plurality of aeration heads (13), the inside of the arch-shaped partition board (7) is also provided with a plurality of light sources (6), the inner cylinder (5) is filled with the bacterial and algal symbionts (10), the upper part of the photo-bioreactor (4) is provided with the overflow weir (8), and the photo-bioreactor (4) is connected with the artificial wetland (12) through the water outlet pipe (9); the constructed wetland (12) is provided with a water inlet partition board (13), and the constructed wetland (12) is divided into a wetland treatment unit (14), an ozone disinfection unit (15) and a membrane treatment unit (16) through the partition board. Gaps are reserved between the transverse partition plates and the longitudinal partition plates of the arched partition plates (7), the light sources (6) are arranged at the gaps between the transverse partition plates and the longitudinal partition plates, the light sources (6) are incandescent lamps or fluorescent lamps, the illumination intensity is between 3000 and 10000lx, and the photo-bioreactor (4) is also provided with a pH meter and a temperature detector. The wetland treatment unit (14) is sequentially provided with a rough filtration layer (17), a matrix layer (18), a fine sand layer (19) and a plant layer (20) from bottom to top, wherein the rough filtration layer (17) is formed by mixing gravel and ceramsite, and the mixing volume ratio is that the gravel is: the ceramsite is 3:1, the substrate layer (18) adopts straw and active carbon, and the mixing volume ratio of the straw is as follows: the active carbon is 2-3:1, and the plant layer (2) is one or more selected from canna, calamus, pennisetum, cane shoots and reed. The treatment device is also provided with a PLC control system (11), the PLC control system (11) is used for controlling the start and stop of water inlet and outlet, light source control, aeration control, ozone generating device and membrane treatment unit of the system, and the aeration heads (13) are connected with an aeration fan through an aeration pipeline. The ozone disinfection unit (15) is internally provided with an ozone generating device, the membrane treatment unit is internally provided with an ultrafiltration membrane, the ultrafiltration membrane is made of one of polyvinyl chloride, polystyrene or cellulose acetate, the pore diameter of the membrane is 0.1-0.3 mu m, and the aperture ratio of the membrane wires is 80% -95%.
The treatment process comprises the following steps: pumping the aquaculture tail water to be treated into a photobioreactor (4) through a water inlet pump (2), controlling the temperature in the photobioreactor (4) to be 18-25 ℃ and the pH to be 6-7 through a pH meter and a temperature detector, adding the domesticated zoon and algae symbiont (10) into the photobioreactor (4), starting a plurality of light sources (6) in the photobioreactor (4), simultaneously starting an aeration fan to treat the aquaculture tail water for 8 hours, enabling the treated supernatant to overflow into an artificial wetland (12) for continuous treatment, enabling the bottom of a water inlet baffle (13) to enter the bottom of a wetland treatment unit (14) for treatment through a coarse filter layer (17), a matrix layer (18), a fine sand layer (19) and a plant layer (20) in sequence, enabling the effluent to enter an ozone disinfection unit (15) for disinfection treatment, and enabling the effluent to enter a membrane treatment unit (16) for treatment and then reach the standard to be discharged or recycled. The preparation process of the mycophyte (10) comprises the following steps: separating and screening a composite strain of thiobacillus denitrificans, nitrifying bacteria, phosphorus accumulating bacteria and bifidobacterium, carrying out enrichment culture, mixing and stirring the composite strain and a carrier, wherein the carrier is wheat bran and modified diatomite, and the mass ratio of the mixed strain to the carrier is 1:3-10, wherein the mass ratio of wheat bran to modified diatomite in the carrier is 1:4-9, adding nutrient solution, mixing to obtain a loaded thallus carrier, and adding the loaded thallus carrier and chlorella into a photobioreactor (4) according to the mass ratio of 5:1 to obtain the zooalgae symbiont (10). The modified diatomite is diatomite modified by a surfactant cetyl trimethyl ammonium bromide. The nutrient solution comprises 1000mg/L glucose, 225mg/L peptone, 268mg/L potassium chloride, 58mg/L magnesium sulfate, 100mg/L dipotassium bicarbonate, 20mg/L copper sulfate and 120mg/L sodium bicarbonate. The treatment time of the ozone disinfection unit (15) is 5 minutes, and the treatment time of the membrane treatment unit (16) is 15 minutes.
By adopting the treatment device and the treatment method to treat the aquaculture tail water, the COD content in the wastewater to be treated is 980mg/L, the SS content is 1235mg/L, the ammonia nitrogen content is 82mg/L and the total phosphorus content is 78mg/L. The wastewater to be treated is treated by the photobioreactor and the constructed wetland in sequence, after the treatment, the content of C0D in the water is detected to be 26mg/L, the content of SS is detected to be 17mg/L, the content of ammonia nitrogen is detected to be 8mg/L, the total phosphorus content is detected to be 1.8mg/L, and the treatment effect is obvious.
Example 2
The treatment device and the treatment method of the embodiment 1 are adopted to treat the aquaculture tail water, the water quality of the treated wastewater is the same as that of the embodiment 1, the difference is that the treatment time of the photo-bioreactor (4) is 10 hours, the treatment time of the wetland treatment unit (14) is 3 hours, the treatment time of the ozone disinfection unit (15) is 8 minutes, the treatment time of the membrane treatment unit (16) is 20 minutes, the content of C0D in the treated water is detected to be 18mg/L, the content of SS is 21mg/L, the content of ammonia nitrogen is 6mg/L, the total phosphorus content is 2.1mg/L, and the treatment effect is obvious.
Example 3
The treatment device and the treatment method of the embodiment 1 are adopted to treat the aquaculture tail water, the treatment process and the treatment parameters are the same as those of the embodiment 1, the treated water quality is 1025mg/L in COD content, 980mg/L in SS content, 75mg/L in ammonia nitrogen content and 62mg/L in total phosphorus content, the content of C0D in the treated water is 15mg/L, 13mg/L in SS content, 5mg/L in ammonia nitrogen content and 1.2mg/L in total phosphorus content, and the treatment effect is obvious.
The above embodiments are preferred embodiments of the present invention, and besides, the present invention may be implemented in other ways, and any obvious substitution is within the scope of the present invention without departing from the concept of the present invention.
Claims (5)
1. The utility model provides a joint constructed wetland sewage treatment plant of fungus and algae intergrowth photobioreactor which characterized in that: comprises a water inlet tank (1), a photobioreactor (4) and an artificial wetland (12); the water inlet tank (1) is connected with the photo-bioreactor (4) through the water inlet pipe (3), the water inlet pipe (3) is provided with the water inlet pump (2), the middle part of the photo-bioreactor (4) is provided with the inner cylinder (5), the inner cylinder (5) is provided with the arch-shaped partition board (7), the inside of the arch-shaped partition board (7) is provided with a plurality of aeration heads, the inside of the arch-shaped partition board (7) is also provided with a plurality of light sources (6), the inner cylinder (5) is filled with the bacterial algae symbiosis (10), the upper part of the outer cylinder of the photo-bioreactor (4) is provided with the overflow weir (8), and the photo-bioreactor (4) is connected with the artificial wetland (12) through the water outlet pipe (9); the artificial wetland (12) is provided with a water inlet partition board (13), the artificial wetland (12) is divided into a wetland treatment unit (14), an ozone disinfection unit (15) and a membrane treatment unit (16) through partition boards, gaps are reserved between a plurality of transverse partition boards and a longitudinal partition board of the arch-shaped partition board (7), a plurality of light sources (6) are arranged at the gaps between the transverse partition boards and the longitudinal partition board, the light sources (6) are incandescent lamps or fluorescent lamps, the illumination intensity is between 3000 and 10000lx, the photobioreactor (4) is also provided with a pH meter and a temperature detector, the wetland treatment unit (14) is sequentially provided with a rough filtering layer (17), a matrix layer (18), a fine sand layer (19) and a plant layer (20) from bottom to top, and the rough filtering layer (17) is mixed with ceramic particles by adopting gravel and has the mixing volume ratio: the ceramsite is 3:1, the substrate layer (18) adopts straw and active carbon, and the mixing volume ratio of the straw is as follows: the active carbon is 2-3:1, and the plant layer (2) is one or more selected from canna, calamus, pennisetum, cane shoots and reed; the preparation process of the mycophyte (10) comprises the following steps: separating and screening a composite strain of thiobacillus denitrificans, nitrifying bacteria, phosphorus accumulating bacteria and bifidobacterium, carrying out enrichment culture, mixing and stirring the composite strain and a carrier, wherein the carrier is wheat bran and modified diatomite, and the mass ratio of the mixed strain to the carrier is 1:3-10, wherein the mass ratio of wheat bran to modified diatomite in the carrier is 1:4-9, adding nutrient solution, mixing to obtain a loaded thallus carrier, and adding the loaded thallus carrier and chlorella into a photobioreactor (4) according to the mass ratio of 5:1 to obtain a zooalgae symbiont (10); the modified diatomite is diatomite modified by a surfactant cetyl trimethyl ammonium bromide; the nutrient solution comprises 1000mg/L glucose, 225mg/L peptone, 268mg/L potassium chloride, 58mg/L magnesium sulfate, 100mg/L dipotassium bicarbonate, 20mg/L copper sulfate and 120mg/L sodium bicarbonate.
2. The apparatus of claim 1, wherein: the treatment device is also provided with a PLC control system (11), the PLC control system (11) is used for controlling the start and stop of water inlet and outlet, a light source, aeration, an ozone generating device and a membrane treatment unit of the system, and the aeration heads are connected with an aeration fan through an aeration pipeline.
3. The apparatus of claim 1, wherein: the ozone disinfection unit (15) is internally provided with an ozone generating device, the membrane treatment unit is internally provided with an ultrafiltration membrane, the ultrafiltration membrane is made of one of polyvinyl chloride, polystyrene or cellulose acetate, the pore diameter of the membrane is 0.1-0.3 mu m, and the aperture ratio of the membrane wires is 80% -95%.
4. A method of treating aquaculture tail water using the apparatus of any one of claims 1-3, characterized in that: pumping the aquaculture tail water to be treated into a photobioreactor (4) through a water inlet pump (2), controlling the temperature in the photobioreactor (4) to be 18-25 ℃ and the pH to be 6-7 through a pH meter and a temperature detector, adding the domesticated zoon and algae symbiont (10) into the photobioreactor (4), starting a plurality of light sources (6) in the photobioreactor (4), simultaneously starting an aeration fan to treat the aquaculture tail water for 8-14 hours, overflowing the treated supernatant into an artificial wetland (12) for continuous treatment, sequentially treating the supernatant with a coarse filter layer (17), a matrix layer (18), a fine sand layer (19) and a plant layer (20) through the bottom of a water inlet baffle (13), sterilizing the effluent with an ozone sterilizing unit (15), and then treating the effluent with a membrane treating unit (16) for standard discharge or reuse.
5. A method of treating aquaculture tail water according to claim 4 wherein: the treatment time of the ozone disinfection unit (15) is 3-30 minutes, and the treatment time of the membrane treatment unit (16) is 10-40 minutes.
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| CN113104978A (en) * | 2021-04-13 | 2021-07-13 | 山东大学 | System and process for strengthening sewage treatment with low carbon-nitrogen ratio |
| CN114394672A (en) * | 2022-01-11 | 2022-04-26 | 玉溪师范学院 | Energy-consumption self-sufficient type water treatment bioreactor for synergetic symbiosis of green plants, bacteria and algae |
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