CN108911146B - Ecological treatment system for domestic sewage - Google Patents
Ecological treatment system for domestic sewage Download PDFInfo
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- CN108911146B CN108911146B CN201811047627.7A CN201811047627A CN108911146B CN 108911146 B CN108911146 B CN 108911146B CN 201811047627 A CN201811047627 A CN 201811047627A CN 108911146 B CN108911146 B CN 108911146B
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- 239000010865 sewage Substances 0.000 title claims abstract description 73
- 238000011282 treatment Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 179
- 238000005273 aeration Methods 0.000 claims abstract description 43
- 230000003647 oxidation Effects 0.000 claims abstract description 42
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 42
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 37
- 241000251468 Actinopterygii Species 0.000 claims abstract description 35
- 240000002853 Nelumbo nucifera Species 0.000 claims abstract description 28
- 241000238571 Cladocera Species 0.000 claims abstract description 26
- 241000196324 Embryophyta Species 0.000 claims abstract description 19
- 241000237858 Gastropoda Species 0.000 claims abstract description 13
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims abstract description 11
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims abstract description 10
- 241000209490 Nymphaea Species 0.000 claims abstract description 6
- 235000016791 Nymphaea odorata subsp odorata Nutrition 0.000 claims abstract description 6
- 239000004927 clay Substances 0.000 claims description 14
- 241000252234 Hypophthalmichthys nobilis Species 0.000 claims description 11
- 241001597062 Channa argus Species 0.000 claims description 6
- 241000252233 Cyprinus carpio Species 0.000 claims description 6
- 241000975357 Salangichthys microdon Species 0.000 claims description 6
- 241001233037 catfish Species 0.000 claims description 6
- 235000013305 food Nutrition 0.000 claims description 6
- 210000003608 fece Anatomy 0.000 claims description 5
- 239000010871 livestock manure Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 241001465754 Metazoa Species 0.000 claims description 4
- 235000014676 Phragmites communis Nutrition 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000012258 culturing Methods 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 7
- 241000195493 Cryptophyta Species 0.000 description 19
- 239000000126 substance Substances 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 235000015097 nutrients Nutrition 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 239000012634 fragment Substances 0.000 description 3
- 238000003306 harvesting Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241001113556 Elodea Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 244000236458 Panicum colonum Species 0.000 description 1
- 235000015225 Panicum colonum Nutrition 0.000 description 1
- 241000235342 Saccharomycetes Species 0.000 description 1
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000036531 allelopathy Effects 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- -1 ammonium ions Chemical class 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 238000011284 combination treatment Methods 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- 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
- C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Microbiology (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Farming Of Fish And Shellfish (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a domestic sewage ecological treatment system, wherein domestic sewage is discharged into a sewage holding tank, is introduced into a spiral aeration device by a water pump, is introduced into an aeration, anaerobic and aerobic biochemical integrated tank by a transparent water conduit, is introduced into a biological cultivation oxidation tank I with lotus plants and water fleas in the tank after treatment, is introduced into a biological cultivation oxidation tank II with water lily, snails, water fleas and a small amount of omnivorous fishes in the tank after treatment, is introduced into a biological cultivation decomposition tank with omnivorous fishes, snails, water plants and lotus plants in the tank after treatment, is discharged into the decomposition tank to be stored, and is recycled and returned to the biological cultivation decomposition tank through the water pump. The water body can restore the normal ecological system without manual cleaning work, thereby saving a great amount of people, things and financial resources; the treated sewage can be cultivated and planted in fish and lotus, a landscape type farm is formed, economic benefits are generated, and the sewage treatment cost is low.
Description
Technical Field
The invention relates to a domestic sewage treatment system.
Background
Domestic sewage mainly comprises carbohydrate, protein, amino acid, fat and other organic matters, and the content of nitrogen and phosphorus is relatively high, so that a large amount of algae grows, when the algae excessively breeds, the algae easily cause water hypoxia, especially blue algae is toxic and harmful, the water quality is deteriorated, and the sewage is odorized, so that the sewage is required to be treated. At present, algae and other harmful microorganisms are killed by chemical substances in general sewage treatment, and sewage is precipitated, digested and the like, and people realize that the sewage is treated by the chemical substances to introduce other harmful substances, so that secondary pollution is formed to water body, and the quality of the treated water is poor; the sewage treatment occupies a large area, so that the environmental pollution to the sewage treatment position is large, and the sewage treatment cost is very high. Aiming at the characteristics, the current domestic sewage treatment is gradually free from excessive transfer of chemical and physical combination treatment to biochemical treatment technologies such as artificial wetland, biological filter or stabilization pond, and the like, and the planted plants are adopted to absorb the eutrophication substances in the sewage to limit the propagation and growth of algae so as to avoid further deterioration of water quality. The combination form of the wetland biological treatment is as follows: oxidation pond + undercurrent wetland + surface current wetland. After the sewage is oxidized in the oxidation pond, the biochemical organic matters are absorbed and utilized by the aquatic plants in the surface flow wetland and the like, so that the aim of treating the sewage is fulfilled. However, because the plant absorbs the eutrophic substances slowly, the plant wetland area needs to be large in order to achieve the treatment effect, otherwise, a large amount of sewage treatment requirements cannot be met; the later maintenance is complicated, a great amount of manpower, material resources and financial resources are required to be input in the later stage to ensure the sustainable operation of the constructed wetland, and the later stage comprises harvesting of plant residues, cleaning of bottom mud of an oxidation pond, dredging and cleaning of surface flow wetland, undercurrent wetland and water channels and the like, so that the maintenance and management are deadly symptoms of the biological treatment of the wetland; and due to poor water quality in the wetland, the planted plants cannot form economic benefits, and the sewage treatment cost is very high.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide the ecological treatment system for the domestic sewage, which can restore the normal ecological system of the water body without the work of harvesting plant residues, cleaning the bottom mud of an oxidation pond, salvaging the surface flow wetland, the subsurface flow wetland, dredging and cleaning the water channel and the like, thereby saving a great deal of manpower, material resources and financial resources; no treatment reagent with secondary pollution to water is required to be added; the treated sewage index can reach the standard of above five-level water, does not contain heavy metal pollutants such as lead, cadmium and the like, can be used for cultivating fishes, lotus and the like in a pond behind sewage treatment, forms a landscape type farm, can be used for visiting people, generates economic benefit, and has low sewage treatment cost.
In order to achieve the above purpose, the technical solution adopted by the invention is as follows: an ecological treatment system for domestic sewage comprises a sewage containing tank, a water pump, a spiral aeration device, a water diversion transparent pipeline, an aeration, anaerobic and aerobic biochemical integrated tank, a biological cultivation oxidation tank I, a biochemical cultivation oxidation tank II, a biological cultivation decomposition tank, a buffer tank and a decomposition pond; domestic sewage is introduced into a sewage containing tank, the sewage containing tank is connected with a water inlet of a spiral aeration device by a water pump, a water outlet of the spiral aeration device is connected with a water inlet of a water diversion transparent pipeline, and a water outlet of the water diversion transparent pipeline is connected with a water inlet of an aeration, anaerobic and aerobic biochemical integrated tank; the water outlet of the aeration, anaerobic and aerobic biochemical integrated tank, which is far away from the water inlet, is connected with the upper water inlet of the biological cultivation oxidation tank I through a pipeline; the upper water outlet of the biological cultivation oxidation pond I, which is far from the upper water inlet, is connected with the upper water inlet of the biochemical cultivation oxidation pond II through a pipeline, and the upper water outlet of the biochemical cultivation oxidation pond II, which is far from the upper water inlet, is connected with the upper water inlet of the biological cultivation decomposition pond through a pipeline; the upper water outlet far away from the upper water inlet of the biological cultivation and decomposition pond is connected with the decomposition pond through a downward inclined pipeline; the biological cultivation decomposition pond is also provided with an overflow port at one end of the upper water outlet, and the overflow port is connected with the decomposition pond through one or more overflow pipes; the water in the decomposing pond is led into the buffer pond by another water pump, and the water outlet at the upper part of the buffer pond is connected with the water inlet of the biological cultivating decomposing pond which is far away from the water outlet at the upper part of the biological cultivating decomposing pond by a pipeline; the aeration, anaerobic and aerobic biochemical integrated tank is longer and shallower, a protective layer for preventing the wall of the flushing tank is paved at the water inlet at the front end, fermented animal manure held and retained by a filter screen is added at the rear part, and the water flow speed and the size of the tank ensure that the time for sewage to pass through the tank is more than 2 hours; the bottom of the biological cultivation oxidation pond I is clay, lotus plants grow in the pond, water fleas are arranged in the pond, and the water flow speed and the size of the pond ensure that the time for sewage to pass through the pond is more than 2 hours; the bottom of the biochemical cultivation oxidation pond II is clay, water lily, snails, water fleas and a small amount of omnivorous fishes taking water fleas and plankton and plant as foods except silver carp are grown, and the water flow speed and the size of the pond ensure that the time for sewage to pass through the pond is more than 2 hours; the bottom of the biological cultivation and decomposition tank is clay, omnivorous fishes and snails taking water fleas and phytoplankton as foods are internally cultivated, water plants and lotus plants are planted, and the water flow speed and the size of the tank ensure that the time for sewage to pass through the tank is more than 12 hours; the bottom of the decomposing pond is clay, and is mainly used for culturing filter-feeding fishes such as silver carp and bighead carp, and simultaneously is also used for culturing omnivorous fishes such as snakehead, catfish, carp, crucian, whitebait, ornamental fish and screw, and is planted with pasture and reed.
Domestic sewage is discharged into a sewage containing tank for purifying and precipitating sludge. Then the water is introduced into a spiral aeration device by a water pump, aeration is carried out in the spiral conveying process, the water molecule structure is activated, and the dissolved oxygen is increased. Then introducing the water into an aeration, anaerobic and aerobic biochemical integrated tank through a transparent water diversion pipeline, irradiating sunlight into the transparent water diversion pipeline, and further activating water molecules through the flow of the water by using microorganisms in the primary biochemical water body; the aeration, anaerobism and aerobic biochemical integrative pond is firstly in the open air aeration oxygenation, strengthens nitrifying ammonium ions, brings volatile matters out of the water surface, primarily decomposes organic matters, nitrifies non-absorbable ammonium into nitrate which can be absorbed by plants, adds fermented animal manure into the rear pond, changes the nitrogen-phosphorus ratio of the water body, creates the growth environment of plankton such as beneficial algae and water fleas, and simultaneously, contains a large amount of beneficial bacteria such as saccharomycetes in the fermented manure, increases the bacterial quantity and enhances the decomposition capacity of the water body. The sewage is then introduced into a biological cultivation oxidation pond I, and beneficial algae are primarily developed and grown due to the proper environment, so that a large amount of nutrient-rich substances such as nitrogen, phosphorus and the like in the water body are absorbed; the water fleas in the pool eat algae; the allelopathy of the grown lotus plants inhibits the growth of blue algae, and the lotus plants absorb eutrophic substances in the growth process; the clay at the bottom of the pool has stronger adsorptivity and can adsorb a large amount of organic matters and metal elements; the decomposing capacity is further enhanced by diluting the water body to oxygenate. The sewage is introduced into a biochemical cultivation oxidation pond II, the pond inhibits blue algae from growing, beneficial algae and water lily are grown, a large amount of nitrogen, phosphorus and other eutrophic substances in the water body are absorbed, meanwhile, fishes and snails are inserted into the pond to form preliminary ecological circulation, the fishes swallow water fleas, and the water fleas swallow the algae; a small amount of fishes are used as wind vanes with water quality treatment effect, and the sewage discharge amount is adjusted according to the health condition of the fishes; the clay at the bottom of the pool has stronger adsorptivity and can adsorb a large amount of organic matters and metal elements; the decomposing capacity is further enhanced by diluting the water body to oxygenate. The treated sewage enters a biological cultivation and decomposition tank, the tank is a subsurface flow tank, and the nutrient substances decomposed before biochemical treatment generate residual organic matters such as algae, fish and snails for digesting algae, water fleas, water flea corpses, organic matter fragments and the like; the water plants and lotus plants continue to digest and absorb the biochemically residual nutrient substances; so far, a great deal of eutrophic substances such as nitrogen and phosphorus in sewage are basically absorbed, beneficial algae in water are eaten by water fleas, fishes and snails, residual organic matters such as water fleas, water flea corpse and organic matter fragments are eaten by fishes and snails, the water body can not be polluted any more, oxygen generated by plants in water such as algae, water plants and lotus plants can completely supply the growth of water fleas, fishes and snails, a good water body environment is formed, and the treated water energy from a water outlet can reach the standards of five water types. Finally, the treated water is discharged into a decomposition pond for storage, and the mixed fishes such as silver carp, bighead carp, filter fish, snakehead, catfish, carp, crucian, whitebait, ornamental fish, screw and the like in the pond can continuously digest the residual organic matters such as algae, water fleas, water flea corpses, organic matter fragments and the like, so that the algae, water grass and reed can continuously consume the nutrient substances. When the water in the biological cultivation and decomposing pond is higher than the overflow port, the water above the overflow port overflows into the decomposing pond to maintain the water level of the biological cultivation and decomposing pond. The method is characterized in that fish and snails are caught regularly, lotus roots, lotus seeds, lotus leaves and other plants are collected regularly, economic benefits can be generated, ornamental type is generated, and a garden sewage treatment system is formed. The water quality of the sewage treatment reaches or is higher than that of the five-stage water, so that the sewage treatment system is very suitable for the cultivation, generates economic benefit and ornamental benefit, and has very low treatment cost and economic benefit which is higher than that of the sewage treatment system in the later stage.
In a word, the sewage ecological treatment system water body can restore the normal ecological system without the work of harvesting plant residues, cleaning the bottom mud of an oxidation pond, salvaging surface flow wetlands, undercurrent wetlands, dredging and cleaning water channels and the like, thereby saving a great amount of manpower, material resources and financial resources; no treatment reagent with secondary pollution to water is required to be added; the treated sewage index can reach or exceed the standard of more than five grades of water, does not contain heavy metal pollutants such as lead, cadmium and the like, is very suitable for cultivation, can be used for cultivating fishes, lotus and the like in a pond behind sewage treatment, forms a landscape type cultivation farm, can be used for visiting people, generates economic benefit, and has low sewage treatment cost.
Still more preferably, the present invention further comprises an intermediate aeration tank connected between the biochemical cultivation oxidation tank II and the biological cultivation decomposition tank; the upper water inlet of the middle aeration tank is connected with the upper water outlet of the biochemical cultivation oxidation tank II through a pipeline, and the upper water outlet of the middle aeration tank is connected with the upper water inlet of the biological cultivation decomposition tank through a pipeline; one or more disc-type water spraying devices are arranged in the middle aeration tank. The disc-type water spraying device sprays water into the air under the action of the water pump, and flows back into the tank after contacting with the air, so that the water is fully aerated, water molecules are activated, dissolved oxygen is increased, oxygen entering the biological cultivation and decomposition tank is more fully supplied, and oxygen in the biological cultivation and decomposition tank is fully supplied.
Further preferably, the spiral aeration device comprises a circular tube type shell and a spiral water passing channel in the tube, wherein an air inlet water blocking valve is arranged on the outer wall of the circular tube type shell and connected with an air pump.
Further preferably, the lotus plant grown in the biological cultivation and oxidation Chichi is lotus.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a second embodiment of the present invention;
FIG. 3 is a schematic view showing the internal structure of the screw aerator according to the present invention;
fig. 4 is a schematic view showing the internal structure of the intermediate aeration tank in the present invention.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
As shown in fig. 1, 3 and 4, the embodiment 1 comprises a sewage containing tank 1, a water pump 2, a spiral aeration device 3, a water diversion transparent pipeline 4, an aeration, anaerobic and aerobic biochemical integrated tank 5, a biological cultivation oxidation tank i 6, a biochemical cultivation oxidation tank ii 7, a biological cultivation decomposition tank 8, a buffer tank 11 and a decomposition pond 9. Domestic sewage is introduced into the sewage holding tank 1, the sewage holding tank 1 is connected with a water inlet of the spiral aeration device 3 by the water pump 2, a water outlet of the spiral aeration device 3 is connected with a water inlet of the water diversion transparent pipeline 4, and a water outlet of the water diversion transparent pipeline 4 is connected with a water inlet of the aeration, anaerobic and aerobic biochemical integrated tank 5. Preferably, the spiral aeration device 3 comprises a circular tube type shell 19 and an in-tube spiral water passing channel 20, an air inlet water blocking valve 18 is arranged on the outer wall of the circular tube type shell 19, and the air inlet water blocking valve 18 is connected with an air pump. The water outlet of the aeration, anaerobic and aerobic biochemical integrated tank 5, which is far away from the water inlet, is connected with the upper water inlet of the biological cultivation oxidation tank I6 by a pipeline. The upper water outlet of the biological cultivation oxidation pond I6, which is far away from the upper water inlet, is connected with the upper water inlet of the biochemical cultivation oxidation pond II 7 through a pipeline, the upper water outlet of the biochemical cultivation oxidation pond II 7, which is far away from the upper water inlet, is connected with the upper water inlet of the biological cultivation decomposition pond 8 through a pipeline, and the upper water outlet of the biological cultivation decomposition pond 8, which is far away from the upper water inlet, is connected with the decomposition pond 9 through a downward-inclined pipeline. The biological cultivation and decomposing pond 8 is also provided with an overflow port at one end of the upper water outlet, and the overflow port is connected with the decomposing pond 9 through one or more overflow pipes 17 (2 in the embodiment). The water in the decomposing pond 9 is led into the buffer pond 11 by the other water pump 10, and the water outlet at the upper part of the buffer pond 11 is connected with the water inlet of the other biological cultivating decomposing pond 8 far away from the water outlet at the upper part of the biological cultivating decomposing pond by a pipeline. The aeration, anaerobic and aerobic biochemical integrated tank 5 is longer and shallower, a protective layer for preventing the wall of the flushing tank is paved at the water inlet at the front end, fermented animal manure held by a filter screen is added at the rear part, and the water flow speed and the size of the tank ensure that the time for sewage to pass through the tank is more than 2 hours. The bottom of the biological cultivation oxidation pond I6 is clay, lotus plants grow in the pond, the lotus plants of this embodiment are lotus, water fleas are arranged in the pond, the water flow speed and the size of the pond ensure that the time of sewage passing through the pond is more than 2 hours. The bottom of the biochemical cultivation oxidation pond II 7 is clay, water lily grows, and the water lily, the water fleas and a small amount of omnivorous fish which takes the water fleas and phytoplankton as food and is except silver carp: such as snakehead, catfish, carp, crucian, whitebait, ornamental fish, screw, and the like, and the water flow speed and the size of the pool ensure that the time for sewage to pass through the pool is more than 2 hours. The bottom of the biological cultivation and decomposition tank 8 is clay, and omnivorous fishes and snails which take water fleas and phytoplankton as foods are cultivated in the tank, wherein the fishes are snakehead, catfish, carp, crucian, whitebait, ornamental fish, screw and the like; planting waterweed and lotus plants, wherein the lotus plants are lotus flowers; the water flow speed and the size of the pool ensure that the time for sewage to pass through the pool is more than 12 hours. The bottom of the decomposing pond 9 is clay, and filter-feeding fishes such as silver carp and bighead carp are mainly cultivated in the decomposing pond, and omnipotent fishes such as snakehead, catfish, carp, crucian, whitebait, ornamental fish and screws are also cultivated in the decomposing pond; is planted with aquatic weed, reed, etc.
As in embodiment 2 shown in fig. 2, 3 and 4, the other structures of this embodiment are the same as those of embodiment 1 except that this embodiment further includes an intermediate aeration tank 13 connected between the biochemical-culture oxidation tank ii 7 and the biological-culture decomposition tank 8. The upper water inlet of the middle aeration tank 13 is connected with the upper water outlet of the biochemical cultivation oxidation tank II 7 through a pipeline, and the upper water outlet is connected with the upper water inlet of the biological cultivation decomposition tank 8 through a pipeline. One or more disc-type water spraying devices 14 are provided in the intermediate aeration tank. The disk water spraying device 14 sprays water into the air under the action of the other water pump 15, and flows back into the tank after contacting with the air, so that the water is fully aerated, water molecules are activated, dissolved oxygen is increased, oxygen entering the biological cultivation and decomposition tank is fully supplied, and oxygen in the biological cultivation and decomposition tank is fully supplied.
The above-described embodiments are only preferred and exemplary, and a person skilled in the art may make equivalent technical changes from the description of the present patent, all of which are covered by the protection scope of the present patent.
Claims (5)
1. An ecological treatment system for domestic sewage, which is characterized in that: the sewage treatment device comprises a sewage containing tank, a water pump, a spiral aeration device, a water diversion transparent pipeline, an aeration, anaerobic and aerobic biochemical integrated tank, a biological cultivation oxidation tank I, a biochemical cultivation oxidation tank II, a biological cultivation decomposition tank, a buffer tank and a decomposition pond; domestic sewage is introduced into a sewage containing tank, the sewage containing tank is connected with a water inlet of a spiral aeration device by a water pump, a water outlet of the spiral aeration device is connected with a water inlet of a water diversion transparent pipeline, and a water outlet of the water diversion transparent pipeline is connected with a water inlet of an aeration, anaerobic and aerobic biochemical integrated tank; the water outlet of the aeration, anaerobic and aerobic biochemical integrated tank, which is far away from the water inlet, is connected with the upper water inlet of the biological cultivation oxidation tank I through a pipeline; the upper water outlet of the biological cultivation oxidation pond I, which is far from the upper water inlet, is connected with the upper water inlet of the biochemical cultivation oxidation pond II through a pipeline, and the upper water outlet of the biochemical cultivation oxidation pond II, which is far from the upper water inlet, is connected with the upper water inlet of the biological cultivation decomposition pond through a pipeline; the upper water outlet far away from the upper water inlet of the biological cultivation and decomposition pond is connected with the decomposition pond through a downward inclined pipeline; the biological cultivation decomposition pond is also provided with an overflow port at one end of the upper water outlet, and the overflow port is connected with the decomposition pond through one or more overflow pipes; the water in the decomposing pond is led into the buffer pond by another water pump, and the water outlet at the upper part of the buffer pond is connected with the water inlet of the biological cultivating decomposing pond which is far away from the water outlet at the upper part of the biological cultivating decomposing pond by a pipeline; the aeration, anaerobic and aerobic biochemical integrated tank is longer and shallower, a protective layer for preventing the wall of the flushing tank is paved at the water inlet at the front end, fermented animal manure held and retained by a filter screen is added at the rear part, and the water flow speed and the size of the tank ensure that the time for sewage to pass through the tank is more than 2 hours; the bottom of the biological cultivation oxidation pond I is clay, lotus plants grow in the pond, water fleas are arranged in the pond, and the water flow speed and the size of the pond ensure that the time for sewage to pass through the pond is more than 2 hours; the bottom of the biochemical cultivation oxidation pond II is clay, water lily, snails, water fleas and a small amount of omnivorous fishes taking water fleas and plankton and plant as foods except silver carp are grown, and the water flow speed and the size of the pond ensure that the time for sewage to pass through the pond is more than 2 hours; the bottom of the biological cultivation and decomposition tank is clay, omnivorous fishes and snails taking water fleas and phytoplankton as foods are internally cultivated, water plants and lotus plants are planted, and the water flow speed and the size of the tank ensure that the time for sewage to pass through the tank is more than 12 hours; the bottom of the decomposing pond is clay, and is mainly used for culturing filter-feeding fishes such as silver carp and bighead carp, and simultaneously is also used for culturing omnivorous fishes such as snakehead, catfish, carp, crucian, whitebait, ornamental fish and screws, and is planted with pasture and reed.
2. The domestic sewage ecological treatment system according to claim 1, wherein: the biological cultivation and decomposing device also comprises an intermediate aeration tank connected between the biochemical cultivation and oxidation tank II and the biological cultivation and decomposing tank; the upper water inlet of the middle aeration tank is connected with the upper water outlet of the biochemical cultivation oxidation tank II through a pipeline, and the upper water outlet of the middle aeration tank is connected with the upper water inlet of the biological cultivation decomposition tank through a pipeline; one or more disc-type water spraying devices are arranged in the middle aeration tank.
3. The domestic sewage ecological treatment system according to claim 1 or 2, wherein: the spiral aeration device comprises a circular tube type shell and a spiral water passing channel in the tube, wherein an air inlet water blocking valve is arranged on the outer wall of the circular tube type shell and connected with an air pump.
4. A domestic sewage ecological treatment system according to claim 3, wherein: the lotus plants grown in the biological cultivation oxidation Chichi are lotus flowers.
5. The domestic sewage ecological treatment system according to claim 1 or 2, wherein: the lotus plants grown in the biological cultivation oxidation Chichi are lotus flowers.
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| CN112759192A (en) * | 2020-12-30 | 2021-05-07 | 江苏裕创环境科技有限公司 | Method for treating breeding sewage of dairy farm |
| CN115072879A (en) * | 2022-08-23 | 2022-09-20 | 河北雄安德荫源环境科技有限公司 | System and method for biological purification and resource conversion and utilization of sewage |
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| US4209388A (en) * | 1978-11-06 | 1980-06-24 | Defraites Arthur A | Method and apparatus for treating sewage |
| KR20030086176A (en) * | 2002-05-03 | 2003-11-07 | 주식회사 진명엔지니어링건축사사무소 | System to make up the mode of ecological park in apartment |
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