CN111847804A - Domestic sewage treatment system - Google Patents
Domestic sewage treatment system Download PDFInfo
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- CN111847804A CN111847804A CN202010825364.9A CN202010825364A CN111847804A CN 111847804 A CN111847804 A CN 111847804A CN 202010825364 A CN202010825364 A CN 202010825364A CN 111847804 A CN111847804 A CN 111847804A
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- 239000010865 sewage Substances 0.000 title claims abstract description 140
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 238000006243 chemical reaction Methods 0.000 claims abstract description 73
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 31
- 241000894006 Bacteria Species 0.000 claims abstract description 25
- 241000700605 Viruses Species 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 31
- 239000010959 steel Substances 0.000 claims description 31
- 230000001105 regulatory effect Effects 0.000 claims description 24
- 239000000945 filler Substances 0.000 claims description 23
- 241000196324 Embryophyta Species 0.000 claims description 19
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 19
- 229910052698 phosphorus Inorganic materials 0.000 claims description 19
- 239000011574 phosphorus Substances 0.000 claims description 19
- 238000005276 aerator Methods 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 14
- 239000003344 environmental pollutant Substances 0.000 claims description 13
- 231100000719 pollutant Toxicity 0.000 claims description 13
- 210000005056 cell body Anatomy 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000010802 sludge Substances 0.000 claims description 7
- 229910002651 NO3 Inorganic materials 0.000 claims description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 235000005273 Canna coccinea Nutrition 0.000 claims description 5
- 235000014676 Phragmites communis Nutrition 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 241001148470 aerobic bacillus Species 0.000 claims description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 244000005700 microbiome Species 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 238000006396 nitration reaction Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000001546 nitrifying effect Effects 0.000 claims description 2
- 239000013618 particulate matter Substances 0.000 claims description 2
- 240000008555 Canna flaccida Species 0.000 claims 1
- 240000001398 Typha domingensis Species 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 11
- 241000234587 Canna Species 0.000 description 4
- 241000233948 Typha Species 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 244000052769 pathogen Species 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- -1 meanwhile Chemical compound 0.000 description 1
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- 239000011150 reinforced concrete Substances 0.000 description 1
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- YFNCATAIYKQPOO-UHFFFAOYSA-N thiophanate Chemical compound CCOC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OCC YFNCATAIYKQPOO-UHFFFAOYSA-N 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- 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
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- 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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a domestic sewage treatment system, which comprises a sewage collecting tank, an adjusting tank and a sewage treatment tank A2The sewage is treated by a grid in a collecting tank and then flows into an adjusting tank and an A tank in sequence2The reaction tank of the reaction is passed through A2Sewage after the/O reaction tank is treated is pumped into an MBR reaction assembly tank, COD is removed, most of particulate matters and virus bacteria are intercepted and filtered, a water body treated by the MBR reaction assembly tank enters a disinfection tank, and flows into an artificial wetland standard discharge tank after disinfection treatment, so that the sewage is ensured to be discharged after being treated to reach the standard. The invention can remove organic matters and a large amount of protozoic organisms in domestic sewage, has high treatment efficiency, is convenient to manage, can be arranged underground, occupies small area, can ensure more thorough sewage purification by the artificial wetland, and is also used for plantingThe aquatic plant can beautify environment.
Description
Technical Field
The invention relates to the technical field of domestic sewage treatment systems, and particularly belongs to a domestic sewage treatment system.
Background
Domestic sewage is sewage which is used by residents in daily life and is often treated in urban sewage plants. For some community-like management organizations, such as rescue management stations, which are concerned with health and medical issues concerning the elderly and children, it is necessary to establish a separate sewage station. The main pollutants contained in the domestic sewage are organic matters and a large amount of protozoon, and if the domestic sewage is directly discharged into the external environment, the natural water body, namely rivers and lakes, in the external environment can be eutrophicated, so that the natural water body is stink, and the ecological environment is seriously influenced. Meanwhile, some bacteria and pathogens in the domestic sewage can multiply, and some infectious diseases are spread. Therefore, domestic sewage can be discharged after being treated to reach the standard. Therefore, a domestic sewage treatment system is developed to solve the domestic sewage treatment problem and realize safe discharge after reaching the standard.
Disclosure of Invention
The present invention has been made in an effort to provide a domestic sewage treatment system which solves the above-mentioned problems of the background art. Is suitable for being popularized and used in domestic sewage treatment.
The technical scheme adopted by the invention is as follows:
a domestic sewage treatment system comprises a sewage collecting tank, a regulating tank and a sewage treatment tank A2The sewage treatment system comprises an/O reaction tank, an MBR reaction component tank, a disinfection tank and an artificial wetland standard-reaching discharge tank, wherein a mechanical grid is arranged on a sewage collection tank, sewage subjected to interception treatment by the mechanical grid flows into an adjusting tank from the sewage collection tank, and sewage subjected to neutralization treatment by the adjusting tank flows into an A2In the/O reaction tank, passing through A2The anaerobic pool, the anoxic pool and the aerobic pool in the/O reaction pool carry out nitrogen and phosphorus removal and COD removal treatment on the sewage, and the sewage is treated by A2Sewage after the/O reaction tank is handled is gone into MBR reaction unit pond by the pump, gets rid of COD once more and holds back most particulate matter and virus bacterium of filtration, and the water after MBR reaction unit pond is handled gets into the disinfection pond, carries out disinfection treatment, and sewage after disinfection treatment flows into constructed wetland discharge pool up to standard and gets rid of the pollutant, and the guarantee sewage treatment discharges after up to standard.
Preferably, the mechanical grids in the sewage collecting tank consist of two groups of grids, the gaps of the two groups of grids are both 3mm, and the grids are made of stainless steel.
Preferably, install elevator pump and level gauge in the equalizing basin, the elevator pump is located the lower part outside of equalizing basin, and the end of intaking of elevator pump passes through pipeline and equalizing basinIs connected with the water outlet end of the lift pump through a pipeline A2The anaerobic tank in the/O reaction tank is connected, the regulating tank can neutralize sewage and carry out homogeneous uniform treatment on the sewage, the liquid level meter can regulate the height of a water level line in the regulating tank, when a low water level line of the regulating tank is reached, the liquid level meter can instruct the lifting pump to stop working, when a high water level line of the regulating tank is reached, the liquid level meter can instruct the lifting pump to start working, the lifting pump has two lifting pumps, the two lifting pumps are one-used-one-standby, the two lifting pumps can be automatically switched through a control system, and only one lifting pump is allowed to work in normal working.
Preferably, A is2the/O reaction tank comprises three tank bodies, namely an anaerobic tank, an anoxic tank and an aerobic tank in sequence, wherein elastic fillers and a microporous aerator are arranged in the three tank bodies, an air blower is arranged on the outer side of the aerobic tank and is connected with the microporous aerator through a pipeline assembly, and A2the/O reaction tank can utilize microorganisms in the tank body to carry out nitrogen and phosphorus removal on organic matters in sewage and remove most of the organic matters, phosphorus accumulating bacteria are arranged in the anaerobic tank, dissolved organic matters in the sewage can be utilized to carry out anaerobic phosphorus release treatment, the sewage treated by the anaerobic tank and a water body at the tail end treated by the aerobic tank are mixed to form a mixed solution to enter the anoxic tank, denitrifying bacteria are arranged in the anoxic tank, denitrification can be carried out by utilizing the residual organic matters in the water body and nitrate in the backflow mixed solution, the sewage enters the aerobic tank after the denitrification reaction is finished, the nitrifying bacteria in sludge at the bottom of the anoxic tank can carry out nitration reaction to convert ammonia nitrogen in the sewage into nitrate, meanwhile, the phosphorus accumulating bacteria in the anaerobic tank can carry out aerobic phosphorus absorption reaction, and then the residual organic matters in the sewage can be oxidized by the aerobic bacteria in the aerobic tank again, the residence time of the sewage in the anaerobic tank and the anoxic tank is 1.8h, and the residence time of the sewage in the aerobic tank is 5 h.
Preferably, the MBR reaction component tank is provided with a steel tank body, a microporous aerator and an MBR membrane component are arranged in the steel tank body, a water inlet pump, a back flush pump and a reflux pump are arranged on the outer side of the steel tank body, and the water inlet end of the water inlet pump is connected with the A through a pipeline component2The water outlet end of the/O reaction tank is connected, the water outlet end of the water inlet pump is connected with the steel tank body through a pipeline assembly, the micro-pore aerator is installed in an area close to the bottom of the tank in the steel tank body, the micro-pore aerator is connected with an air blower through a pipeline assembly, the MBR membrane assembly is installed in an area on the upper part of the steel tank body, the water inlet end of the back flush pump is connected with a water body sterilized by an ultraviolet sterilizer through a pipeline assembly, the water outlet end of the back flush pump is connected with the MBR membrane assembly through a pipeline assembly, the water inlet end of the reflux pump is connected with the water body processed by the MBR reaction assembly tank through a pipeline assembly, and the water outlet end2The anaerobic tank in the/O reaction tank is connected, the MBR membrane module can intercept and filter most of particulate matters and virus bacteria in the sewage, can ensure that the aerobic sludge concentration of the inner side of the steel tank body is high, the pollutant removal efficiency is high, and the whole sewage treatment effect of the MBR reaction module tank is enhanced.
Preferably, the disinfection tank is provided with a steel tank body, an ultraviolet sterilizer is arranged in the steel tank body, the ultraviolet sterilizer can remove virus and bacteria in the sewage by using ultraviolet light, the disinfection time of the ultraviolet sterilizer in the disinfection tank is 1h, and the amount of the treated sewage is 5 cubic meters per hour.
Preferably, constructed wetland discharge tank up to standard has cell body, filler and vegetation, and the cell body is the steel, and the inside filler that is covered with of cell body plants vegetation above the filler, the filler is special ecological filter material, and the filler from the top down is soil covering layer, ceramic sand rate bed of material, cobble layer in proper order, the vegetation is special aquatic plant, and special aquatic plant can be reed, cattail, canna, and constructed wetland discharge tank up to standard can the advanced treatment process MBR reaction component pond disinfection pond handle the back, and the pollutant in the tail water is further got rid of to the tail water of inflow, guarantees that the full index of tail water accords with the emission requirement after up to standard.
Compared with the prior art, the invention has the following beneficial effects:
through a sewage collecting tank, an adjusting tank A2The integral optimization design of the/O reaction tank, the MBR reaction component tank, the disinfection tank and the artificial wetland discharge tank reaching the standard is made into a firstThe thiophanate-based wastewater treatment system can remove main pollutants, organic matters and a large amount of protozoic organisms in domestic sewage, and a large amount of bacteria and pathogens are propagated, so that the domestic sewage treatment problem in the background technology is solved, and the domestic sewage is safely discharged after reaching the standard.
The invention can remove organic matters and a large amount of protozoic organisms in domestic sewage, has high treatment efficiency and convenient management, can arrange the whole system underground, occupies small area, can ensure more thorough sewage purification by the artificial wetland, and can beautify the environment by the planted special aquatic plants.
Drawings
FIG. 1 is a schematic overall flow chart of the system of the present invention;
FIG. 2 is a schematic diagram of the sludge water reflux between the MBR reaction unit tank and the A2/O reaction tank in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described below with specific embodiments, and the technical solutions in the embodiments of the present invention are clearly and completely described. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in further detail with reference to specific embodiments.
A domestic sewage treatment system comprises a sewage collecting tank, a regulating tank and a sewage treatment tank A2The sewage treatment system comprises an/O reaction tank, an MBR reaction component tank, a disinfection tank and an artificial wetland standard-reaching discharge tank, wherein a mechanical grid is arranged on a sewage collection tank, sewage subjected to interception treatment by the mechanical grid flows into an adjusting tank from the sewage collection tank, and sewage subjected to neutralization treatment by the adjusting tank flows into an A2In the/O reaction tank, passing through A2The anaerobic pool, the anoxic pool and the aerobic pool in the/O reaction pool carry out nitrogen and phosphorus removal and COD removal treatment on the sewage, and the sewage is treated by A2Pumping the sewage treated by the/O reaction tank into an MBR reaction component tankAnd removing COD again, intercepting and filtering most of particulate matters and virus bacteria, enabling the water body treated by the MBR reaction component pool to enter a disinfection pool, performing disinfection treatment, enabling the sewage after the disinfection treatment to flow into the constructed wetland discharge-reaching-standard pool to remove pollutants, and ensuring the discharge of the sewage after the sewage treatment reaches the standard.
Preferably, the mechanical grids in the sewage collecting tank consist of two groups of grids, the gaps of the two groups of grids are both 3mm, and the grids are made of stainless steel.
Preferably, install elevator pump and level gauge in the equalizing basin, the elevator pump is located the lower part outside of equalizing basin, and the end of intaking of elevator pump passes through the pipeline and is connected with the equalizing basin, and the play water end of elevator pump passes through pipeline and A2The anaerobic tank in the/O reaction tank is connected, the regulating tank can neutralize sewage and carry out homogeneous uniform treatment on the sewage, the liquid level meter can regulate the height of a water level line in the regulating tank, when a low water level line of the regulating tank is reached, the liquid level meter can instruct the lifting pump to stop working, when a high water level line of the regulating tank is reached, the liquid level meter can instruct the lifting pump to start working, the lifting pump has two lifting pumps, the two lifting pumps are one-used-one-standby, the two lifting pumps can be automatically switched through a control system, and only one lifting pump is allowed to work in normal working.
Preferably, A is2the/O reaction tank comprises three tank bodies, namely an anaerobic tank, an anoxic tank and an aerobic tank in sequence, wherein elastic fillers and a microporous aerator are arranged in the three tank bodies, an air blower is arranged on the outer side of the aerobic tank and is connected with the microporous aerator through a pipeline assembly, and A2the/O reaction tank can utilize microorganisms in the tank body to perform nitrogen and phosphorus removal on organic matters in sewage and remove most of the organic matters, phosphorus accumulating bacteria are arranged in the anaerobic tank, dissolved organic matters in the sewage can be utilized to perform anaerobic phosphorus release treatment, the sewage treated by the anaerobic tank and a water body at the tail end treated by the aerobic tank are mixed to form a mixed liquid to enter the anoxic tank, denitrifying bacteria are arranged in the anoxic tank, the residual organic matters in the water body and nitrate in a backflow mixed liquid can be utilized to perform denitrification, the sewage enters the aerobic tank after denitrification reaction is completed, and the sewage enters the anoxic tank after the denitrification reaction is completedNitrifying bacteria in sludge at the bottom of the oxygen tank can carry out nitration reaction to convert ammonia nitrogen in the sewage into nitrate, meanwhile, phosphorus accumulating bacteria in the anaerobic tank can carry out aerobic phosphorus absorption reaction, then, the rest organic matters in the sewage can be oxidized by the aerobic bacteria in the aerobic tank again, the residence time of the sewage in the anaerobic tank and the anoxic tank is 1.8h, and the residence time of the sewage in the aerobic tank is 5 h.
Preferably, the MBR reaction component tank is provided with a steel tank body, a microporous aerator and an MBR membrane component are arranged in the steel tank body, a water inlet pump, a back flush pump and a reflux pump are arranged on the outer side of the steel tank body, and the water inlet end of the water inlet pump is connected with the A through a pipeline component2The water outlet end of the/O reaction tank is connected, the water outlet end of the water inlet pump is connected with the steel tank body through a pipeline assembly, the micro-pore aerator is installed in an area close to the bottom of the tank in the steel tank body, the micro-pore aerator is connected with an air blower through a pipeline assembly, the MBR membrane assembly is installed in an area on the upper part of the steel tank body, the water inlet end of the back flush pump is connected with a water body sterilized by an ultraviolet sterilizer through a pipeline assembly, the water outlet end of the back flush pump is connected with the MBR membrane assembly through a pipeline assembly, the water inlet end of the reflux pump is connected with the water body processed by the MBR reaction assembly tank through a pipeline assembly, and the water outlet end2The anaerobic tank in the/O reaction tank is connected, the MBR membrane module can intercept and filter most of particulate matters and virus bacteria in the sewage, can ensure that the aerobic sludge concentration of the inner side of the steel tank body is high, the pollutant removal efficiency is high, and the whole sewage treatment effect of the MBR reaction module tank is enhanced.
Preferably, the disinfection tank is provided with a steel tank body, an ultraviolet sterilizer is arranged in the steel tank body, the ultraviolet sterilizer can remove virus and bacteria in the sewage by using ultraviolet light, the disinfection time of the ultraviolet sterilizer in the disinfection tank is 1h, and the amount of the treated sewage is 5 cubic meters per hour.
Preferably, constructed wetland discharge tank up to standard has cell body, filler and vegetation, and the cell body is the steel, and the inside filler that is covered with of cell body plants vegetation above the filler, the filler is special ecological filter material, and the filler from the top down is soil covering layer, ceramic sand rate bed of material, cobble layer in proper order, the vegetation is special aquatic plant, and special aquatic plant can be reed, cattail, canna, and constructed wetland discharge tank up to standard can the advanced treatment process MBR reaction component pond disinfection pond handle the back, and the pollutant in the tail water is further got rid of to the tail water of inflow, guarantees that the full index of tail water accords with the emission requirement after up to standard.
The invention will be described more fully and clearly in connection with fig. 1 and 2, in which:
the sewage flows through two groups of mechanical gratings on the sewage collecting tank to intercept and remove larger solids in the sewage, the sewage subjected to interception treatment by the mechanical gratings on the sewage collecting tank flows into the regulating tank, the regulating tank can neutralize the sewage and perform homogeneous and uniform treatment on the sewage, and the sewage is subjected to the homogeneous and uniform treatment in the regulating tank;
sewage enters A through a lift pump in the regulating reservoir2In the/O reaction tank, sewage is subjected to nitrogen and phosphorus removal and chemical oxygen demand COD removal treatment through an anaerobic tank, an anoxic tank and an aerobic tank;
the sewage passes through A2After the treatment in the/O reaction tank, pumping the wastewater into an MBR reaction component tank, further removing Chemical Oxygen Demand (COD) and intercepting and filtering most of particulate matters and virus bacteria;
after being treated by an MBR reaction component tank, the wastewater enters a disinfection tank and is disinfected by an ultraviolet sterilizer; meanwhile, the water body disinfected by the ultraviolet sterilizer in the disinfection tank can provide a water source for backwashing of an MBR membrane assembly in the MBR reaction assembly tank;
and the disinfected sewage enters an artificial wetland standard-reaching discharge tank to further remove pollutants, so that the sewage treatment standard-reaching discharge is guaranteed.
According to the system disposal process in the invention, in the actual embodiment treatment, the treatment process comprises the following steps:
the regulating tank is of a reinforced concrete structure A2the/O reaction tank and the MBR reaction component tank can be steel-made integrated sewage treatment devices; the whole system can realize automatic control work through an automatic control system device; the regulating tank is provided with a liquid level meter which canThe height of a water level line in the regulating tank is regulated, when the water level line reaches a low water level line of the regulating tank, the liquid level meter can instruct the lifting pump to stop working, when the water level line reaches a high water level line of the regulating tank, the liquid level meter can instruct the lifting pump to start working, the two lifting pumps are used and standby, the two lifting pumps can be automatically switched through a control system device, and only one lifting pump is allowed to work in normal working;
a reflux pump and a back flush pump are arranged at the outer side of the MBR reaction component tank, the reflux pump and A2An anaerobic tank in the/O reaction tank is connected through a pipeline assembly, and a back flushing pump can clean an MBR membrane assembly in the MBR reaction assembly tank to ensure the normal work of the MBR reaction assembly tank;
the cell body of constructed wetland discharge tank up to standard is the steel structure, and the inside filler that is covered with of cell body, the vegetation plant of planting above the filler, and the filler from the top down is earthing layer, ceramic sand rate bed of material, cobble layer in proper order, and the vegetation plant is special aquatic plant, and special aquatic plant can be reed, cattail, canna, and these special aquatic plant advantages of reed, cattail, canna are: the system can ensure that the system fully utilizes the biological film growing on the surface of the filler, rich root systems and the interception function of the filler, and has high treatment efficiency; the constructed wetland discharge tank up to standard can the advanced treatment process MBR reaction assembly pond disinfection pond handle the back, and the pollutant in the tail water is further got rid of to the tail water that flows in, guarantees that the full index of tail water accords with the emission requirement after up to standard.
The invention can remove organic matters and a large amount of protozoic organisms in domestic sewage, has high treatment efficiency and convenient management, can be arranged underground, has small occupied area, ensures the treated domestic sewage to reach the standard, can purify the sewage more deeply, ensures the sewage to be purified more thoroughly by the artificial wetland, and simultaneously beautifies the environment by the special aquatic plants planted.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (7)
1. A domestic sewage treatment system comprises a sewage collecting tank, a regulating tank and a sewage treatment tank A2The sewage treatment system comprises an/O reaction tank, an MBR reaction component tank, a disinfection tank and an artificial wetland standard-reaching discharge tank, wherein a mechanical grid is arranged on a sewage collection tank, sewage subjected to interception treatment by the mechanical grid flows into an adjusting tank from the sewage collection tank, and sewage subjected to neutralization treatment by the adjusting tank flows into an A2In the/O reaction tank, passing through A2The anaerobic pool, the anoxic pool and the aerobic pool in the/O reaction pool carry out nitrogen and phosphorus removal and COD removal treatment on the sewage, and the sewage is treated by A2Sewage after the/O reaction tank is handled is gone into MBR reaction unit pond by the pump, gets rid of COD once more and holds back most particulate matter and virus bacterium of filtration, and the water after MBR reaction unit pond is handled gets into the disinfection pond, carries out disinfection treatment, and sewage after disinfection treatment flows into constructed wetland discharge pool up to standard and gets rid of the pollutant, and the guarantee sewage treatment discharges after up to standard.
2. The domestic sewage treatment system of claim 1 wherein the mechanical grates in the sewage collection basin are comprised of two sets of grates, wherein the gaps between the two sets of grates are 3mm, and the grates are made of stainless steel.
3. The domestic sewage treatment system of claim 1, wherein a lift pump and a level gauge are installed in the regulating reservoir, the lift pump is located outside the lower portion of the regulating reservoir, the water inlet end of the lift pump is connected with the regulating reservoir through a pipeline, and the water outlet end of the lift pump is connected with A through a pipeline2Anaerobic pond among the/O reaction tank is connected, the equalizing basin can neutralize sewage to carry out the homogeneous even volume processing to sewage, the water level line height in the equalizing basin can be adjusted to the level gauge, when reaching the low water line of equalizing basin, the level gauge can command control elevator pump stop work, when reaching the high water line of equalizing basin, the level gauge can command control elevator pump start-up work, the elevator pump has two, and two elevator pumps are one and one spare, can be through control system automatic switch-over between two elevator pumps, normal worker's workerOnly one lift pump is allowed to operate.
4. The sewage treatment system of claim 1, wherein A is the same as A2the/O reaction tank comprises three tank bodies, namely an anaerobic tank, an anoxic tank and an aerobic tank in sequence, wherein elastic fillers and a microporous aerator are arranged in the three tank bodies, an air blower is arranged on the outer side of the aerobic tank and is connected with the microporous aerator through a pipeline assembly, and A2the/O reaction tank can utilize microorganisms in the tank body to carry out nitrogen and phosphorus removal on organic matters in sewage and remove most of the organic matters, phosphorus accumulating bacteria are arranged in the anaerobic tank, dissolved organic matters in the sewage can be utilized to carry out anaerobic phosphorus release treatment, the sewage treated by the anaerobic tank and a water body at the tail end treated by the aerobic tank are mixed to form a mixed solution to enter the anoxic tank, denitrifying bacteria are arranged in the anoxic tank, denitrification can be carried out by utilizing the residual organic matters in the water body and nitrate in the backflow mixed solution, the sewage enters the aerobic tank after the denitrification reaction is finished, the nitrifying bacteria in sludge at the bottom of the anoxic tank can carry out nitration reaction to convert ammonia nitrogen in the sewage into nitrate, meanwhile, the phosphorus accumulating bacteria in the anaerobic tank can carry out aerobic phosphorus absorption reaction, and then the residual organic matters in the sewage can be oxidized by the aerobic bacteria in the aerobic tank again, the residence time of the sewage in the anaerobic tank and the anoxic tank is 1.8h, and the residence time of the sewage in the aerobic tank is 5 h.
5. The domestic sewage treatment system of claim 1, wherein the MBR reaction component tank has a steel tank body, a micro-pore aerator and an MBR membrane component are arranged in the steel tank body, a water inlet pump, a back flush pump and a reflux pump are arranged on the outer side of the steel tank body, and the water inlet end of the water inlet pump is connected with the A through a pipeline component2The water outlet end of the/O reaction tank is connected, the water outlet end of the water inlet pump is connected with the steel tank body through a pipeline assembly, the micro-porous aerator is arranged in a region close to the bottom of the steel tank body, the micro-porous aerator is connected with an air blower through a pipeline assembly, the MBR membrane assembly is arranged in the upper region of the steel tank body, and the water inlet end of the back flush pump is connected with the water inlet end of the water inlet pumpThe water body after being disinfected by the ultraviolet sterilizer in the disinfection tank is connected with the pipeline component, the water outlet end of the back flush pump is connected with the MBR membrane component through the pipeline component, the water inlet end of the reflux pump is connected with the water body after being treated by the MBR reaction component tank through the pipeline component, and the water outlet end of the reflux pump is connected with the water body A through the pipeline component2The anaerobic tank in the/O reaction tank is connected, the MBR membrane module can intercept and filter most of particulate matters and virus bacteria in the sewage, can ensure that the aerobic sludge concentration of the inner side of the steel tank body is high, the pollutant removal efficiency is high, and the whole sewage treatment effect of the MBR reaction module tank is enhanced.
6. The domestic sewage treatment system according to claim 1, wherein said disinfection tank has a steel tank body, an ultraviolet sterilizer is installed inside the steel tank body, the ultraviolet sterilizer can remove virus and bacteria in the sewage by using ultraviolet light, the disinfection time of the ultraviolet sterilizer in the disinfection tank is 1h, and the amount of the treated sewage is 5 cubic per hour.
7. The domestic sewage treatment system of claim 1, characterized in that constructed wetland discharge pond up to standard has cell body, filler and vegetation plant, and the cell body is the steel, and the inside filler that is covered with of cell body, the installation above the filler is planted and is had the vegetation plant, the filler is special ecological filter material, and the filler from the top down is soil covering layer, ceramic sand rate bed of material, cobble layer in proper order, the vegetation plant is special aquatic plant, and special aquatic plant can be reed, cattail, canna, and constructed wetland discharge pond up to standard can advanced treatment process the back through MBR reaction component pond disinfection pond, and the pollutant in the tail water is further got rid of to the tail water of inflow, guarantees that the full index of tail water accords with the emission requirement after up to standard.
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