CN107814439B - Novel rural domestic sewage denitrification and dephosphorization purification wetland system - Google Patents
Novel rural domestic sewage denitrification and dephosphorization purification wetland system Download PDFInfo
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- CN107814439B CN107814439B CN201711342876.4A CN201711342876A CN107814439B CN 107814439 B CN107814439 B CN 107814439B CN 201711342876 A CN201711342876 A CN 201711342876A CN 107814439 B CN107814439 B CN 107814439B
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- 239000010865 sewage Substances 0.000 title claims abstract description 62
- 238000000746 purification Methods 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000010802 sludge Substances 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims description 101
- 238000000926 separation method Methods 0.000 claims description 55
- 238000005192 partition Methods 0.000 claims description 51
- 238000010992 reflux Methods 0.000 claims description 39
- 238000005273 aeration Methods 0.000 claims description 26
- 239000000945 filler Substances 0.000 claims description 25
- 239000007789 gas Substances 0.000 claims description 23
- 230000001954 sterilising effect Effects 0.000 claims description 20
- 238000004659 sterilization and disinfection Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 2
- 239000001301 oxygen Substances 0.000 claims 2
- 229910052760 oxygen Inorganic materials 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 4
- 239000011574 phosphorus Substances 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 abstract 1
- 238000011049 filling Methods 0.000 description 12
- 238000004062 sedimentation Methods 0.000 description 12
- 210000003608 fece Anatomy 0.000 description 11
- 239000010871 livestock manure Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003933 environmental pollution control Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 235000015816 nutrient absorption Nutrition 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000005068 transpiration Effects 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
- 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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—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
- 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
-
- 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
- C02F2101/105—Phosphorus compounds
-
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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- Treatment Of Biological Wastes In General (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
A new rural domestic sewage denitrification and dephosphorization purification wetland system comprises rural domestic sewage households, an air-lifting septic tank correspondingly connected with the sewage pipes of the rural domestic sewage households and a water outlet pipe connected with the air-lifting septic tank, wherein each rural domestic sewage household owner is correspondingly connected with an air-lifting septic tank, an integrated purification tank is additionally arranged behind each air-lifting septic tank, all the air-lifting septic tanks are connected in parallel and are integrally and collectively connected to one integrated purification tank, each integrated purification tank is connected with the water outlet pipe, each water outlet pipe is connected with an artificial wetland, and each integrated purification tank is provided with a return pipeline connected with each air-lifting septic tank, so that the multi-section biochemical treatment effect is realized; the higher concentration of the activated sludge is kept; the purifying tank is not blocked; the collection and summarization of household sewage in all the places are realized, and the household sewage is treated together; the sewage treatment achieves the effect of total nitrogen and total phosphorus first-grade A; the nitrification and denitrification are synchronously realized by utilizing the aerobic activated sludge particles, and the artificial wetland is utilized, so that the wastewater is not required to be manually reprocessed.
Description
Technical Field
The invention belongs to the technical field of sewage treatment and environmental protection, and particularly relates to improvement and upgrade of a process for combined application of a conventional septic tank, an improved air-lift septic tank and an integrated purifying tank in rural sewage treatment.
Background
At present, with the increasing severity of rural domestic pollution, rural sewage treatment is urgent. The conventional design can be divided into two-grid septic tanks or three-grid septic tanks, the conventional septic tanks have a plurality of defects, when the conventional septic tanks are used for sewage treatment in new rural areas, after the pipelines are aged and blocked, activated sludge cannot be supplied to crops for use, and under the condition of pipeline communication, the conventionally adopted two-grid septic tanks or three-grid septic tanks have no denitrification and dephosphorization effects and are directly discharged, so that river pollution is caused.
In addition, the traditional single-purification septic tank treatment technology is easy to generate blockage, so that the effect of total nitrogen and total phosphorus first-grade A cannot be achieved, and a plurality of difficulties are brought to the environmental pollution control in new rural areas of China.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for realizing multi-section biochemical treatment effect; the higher concentration of the activated sludge is kept; the purifying tank is not blocked; the collection and summarization of household sewage in all the places are realized, and the household sewage is treated together; the sewage treatment achieves the effect of total nitrogen and total phosphorus first-grade A; the nitrification and denitrification are synchronously realized by using the aerobic activated sludge particles, and the new rural domestic sewage denitrification and dephosphorization purification wetland system which does not need to manually reprocess the drainage is utilized.
In order to achieve the purpose of the invention, the following technical scheme is provided: a new rural domestic sewage denitrification and dephosphorization purification wetland system comprises rural domestic sewage households, an air-lift septic tank correspondingly connected with the sewage pipes of the rural domestic sewage households and a water outlet pipe connected with the air-lift septic tank, and is characterized in that each rural domestic sewage householder is correspondingly connected with the air-lift septic tank, an integrated purification tank is additionally arranged behind the air-lift septic tank, all the air-lift septic tanks are connected in parallel and are integrally gathered and connected to one integrated purification tank, the integrated purification tank is connected with the water outlet pipe, the water outlet pipe is connected with the artificial wetland, the integrated purification tank is provided with a backflow pipeline which is connected with the air-lift septic tank, the integrated purification tank comprises a horizontal shell, an inflow port which is arranged at the near top end of the left side of the horizontal shell, a drainage port which is arranged at the near top end of the right side of the horizontal shell, and a main baffle which is arranged in the horizontal shell, the main partition plate divides the horizontal shell into two chambers from left to right, the left chamber is an anaerobic zone, the right chamber is an aerobic zone, the horizontal shell is characterized in that the left chamber comprises a solid-liquid separation tank arranged near the top end, the rest space forms a sludge storage tank, the solid-liquid separation tank comprises a tank body with an open top end, a first overflow port arranged near the top end of the tank body, and a sludge outlet arranged near the bottom end of the tank body, a first partition plate and a second partition plate are arranged in the tank body to divide the tank body into a first solid-liquid separation zone, a second solid-liquid separation zone and a third solid-liquid separation zone from left to right, a second overflow port and a third overflow port which are used for enabling adjacent areas to be communicated are arranged on the first partition plate and the second partition plate, and the inflow port is communicated with the first fixed separation zone; the right chamber is divided into an upper chamber, a middle chamber, a lower chamber and a settling tank by a third partition plate and a fourth partition plate, a sterilizing tank is arranged at a position close to a discharge port of the right chamber, a water inlet is arranged on a tank body of the sterilizing tank and communicated with the near top end of the settling tank, the discharge port is communicated with the sterilizing tank, a fourth overflow port which enables the support flow chamber and the slow support flow chamber to be communicated is arranged at the near top end of the third partition plate, and a water passing channel between the slow support flow chamber and the settling tank is formed by the bottom end of the fourth partition plate and the horizontal shell at intervals; the near top end of the solid-liquid separation three areas is provided with a water outlet communicated with a carrier flow chamber, a quantitative air-lift water inlet device is arranged between the carrier flow chamber and the sludge storage tank, an adjustable air-lift reflux device is arranged between the denitrification device and the slow carrier flow chamber, and the carrier flow chamber and the slow carrier flow chamber are both provided with aerobic aeration devices.
Preferably, the denitrification device comprises a water inlet tank arranged in the solid-liquid separation zone, a filling pipe communicated with the water inlet tank and a water outlet pipe connected with the tail end of the filling pipe, wherein the filling pipe penetrates out of the solid-liquid separation zone and stretches into the near bottom end of the sludge storage tank, the water outlet pipe is perpendicular to the filling pipe, a plurality of water outlets are uniformly formed in the pipe wall of the water outlet pipe, and filling materials are arranged in the filling pipe.
Preferably, an adjustable mixed liquid gas stripping reflux device is arranged between the denitrification device and the slow supporter flow chamber, the adjustable mixed liquid gas stripping reflux device comprises a flow control valve and a mixed liquid gas stripping main pipe extending into the near bottom end of the slow supporter flow chamber, a reflux pipe communicated with the mixed liquid gas stripping main pipe is communicated with the denitrification device water inlet tank, and an observation port is formed in the pipe wall at the upper part of the reflux pipe.
Preferably, the sterilizing tank comprises a sealing shell and a sterilizing sheet quantitative adding device arranged in the sealing shell.
In order to achieve the purpose of the invention, another technical scheme is provided: a new rural domestic sewage denitrification and dephosphorization purification wetland system comprises rural domestic sewage households, an air-lifting septic tank correspondingly connected with the sewage pipes of the rural domestic sewage households and a water outlet pipe connected with the air-lifting septic tank, and is characterized in that each rural domestic sewage householder is correspondingly connected with an integrated purification tank, the air-lifting septic tank is additionally arranged behind the integrated purification tank, all the integrated purification tanks are connected in parallel and are integrally summarized and connected to one air-lifting septic tank, the air-lifting septic tank is connected with the water outlet pipe, the water outlet pipe is connected with an artificial wetland, the air-lifting septic tank is provided with a backflow pipeline connected with the integrated purification tank, the integrated purification tank comprises a horizontal shell, an inflow port arranged at the near top end of the left side of the horizontal shell, a discharge port arranged at the near top end of the right side of the horizontal shell, and a main baffle arranged in the horizontal shell, the main partition plate divides the horizontal shell into two chambers from left to right, the left chamber is an anaerobic zone, the right chamber is an aerobic zone, the horizontal shell is characterized in that the left chamber comprises a solid-liquid separation tank arranged near the top end, the rest space forms a sludge storage tank, the solid-liquid separation tank comprises a tank body with an open top end, a first overflow port arranged near the top end of the tank body, and a sludge outlet arranged near the bottom end of the tank body, a first partition plate and a second partition plate are arranged in the tank body to divide the tank body into a first solid-liquid separation zone, a second solid-liquid separation zone and a third solid-liquid separation zone from left to right, a second overflow port and a third overflow port which are used for enabling adjacent areas to be communicated are arranged on the first partition plate and the second partition plate, and the inflow port is communicated with the first fixed separation zone; the right chamber is divided into an upper chamber, a middle chamber, a lower chamber and a settling tank by a third partition plate and a fourth partition plate, a sterilizing tank is arranged at a position close to a discharge port of the right chamber, a water inlet is arranged on a tank body of the sterilizing tank and communicated with the near top end of the settling tank, the discharge port is communicated with the sterilizing tank, a fourth overflow port which enables the support flow chamber and the slow support flow chamber to be communicated is arranged at the near top end of the third partition plate, and a water passing channel between the slow support flow chamber and the settling tank is formed by the bottom end of the fourth partition plate and the horizontal shell at intervals; the near top end of the solid-liquid separation three areas is provided with a water outlet communicated with a carrier flow chamber, a quantitative air-lift water inlet device is arranged between the carrier flow chamber and the sludge storage tank, an adjustable air-lift reflux device is arranged between the denitrification device and the slow carrier flow chamber, and the carrier flow chamber and the slow carrier flow chamber are both provided with aerobic aeration devices.
Preferably, the denitrification device comprises a water inlet tank arranged in the solid-liquid separation zone, a filling pipe communicated with the water inlet tank and a water outlet pipe connected with the tail end of the filling pipe, wherein the filling pipe penetrates out of the solid-liquid separation zone and stretches into the near bottom end of the sludge storage tank, the water outlet pipe is perpendicular to the filling pipe, a plurality of water outlets are uniformly formed in the pipe wall of the water outlet pipe, and filling materials are arranged in the filling pipe.
Preferably, an adjustable mixed liquid gas stripping reflux device is arranged between the denitrification device and the slow supporter flow chamber, the adjustable mixed liquid gas stripping reflux device comprises a flow control valve and a mixed liquid gas stripping main pipe extending into the near bottom end of the slow supporter flow chamber, a reflux pipe communicated with the mixed liquid gas stripping main pipe is communicated with the denitrification device water inlet tank, and an observation port is formed in the pipe wall at the upper part of the reflux pipe.
Preferably, the sterilizing tank comprises a sealing shell and a sterilizing sheet quantitative adding device arranged in the sealing shell.
The invention has the beneficial effects that: the invention has a special air-lift septic tank in each family, which is connected with the corresponding family through the pipeline, and each air-lift septic tank is mutually independent. The invention connects the sludge treated by each air-lift septic tank into an integrated purifying tank through a round or rectangular pipeline, uniformly treats the sludge in the purifying tank, organically combines the sludge in the purifying tank with an anaerobic zone, an aerobic zone, an aeration zone and a reflux zone, overcomes the defects of the prior art, and realizes the two-stage biochemical treatment effect; the higher concentration of the activated sludge is maintained; the purifying tank is not blocked; the collection and summarization of household sewage in all the places are realized, and the household sewage is treated together; the treatment capacity achieves the effect of total nitrogen and total phosphorus first-order A; the nitrification and denitrification are synchronously realized by utilizing aerobic activated sludge particles. Or the positions of the integrated purifying tank and the air-lifting septic tank are exchanged, so that the effects can be obtained.
Drawings
Fig. 1 is a schematic diagram of a system in embodiment 1 of the present invention.
Fig. 2 is a schematic view of the improved air-stripping septic tank shown in fig. 1.
Fig. 3 is a schematic structural diagram of the mixed liquid stripping device and the automatic manure stripping device in fig. 2.
Fig. 4 is a schematic view of the rotary flow regulator of fig. 2.
Fig. 5 is a front view of the purge tank of fig. 1.
Fig. 6 is a top view of fig. 5.
Fig. 7 is a cross-sectional view A-A of fig. 6.
FIG. 8 is a schematic diagram of the denitrification device in FIG. 5.
FIG. 9 is a top view of the denitrification device of FIG. 8.
FIG. 10 is a schematic view of the connection between the blower and the stripping device and the aeration zone of FIG. 6.
Fig. 11 is a schematic diagram of a system in embodiment 2 of the present invention.
Fig. 12 is a schematic view of the modified type air-stripping septic tank of example 3.
Description of the embodiments
Example 1: a new rural domestic sewage denitrification and dephosphorization purification wetland system comprises a rural domestic sewage house owner 1, an air-lift type septic tank 4 correspondingly connected with a sewage pipe of the rural domestic sewage house owner 1 and a water outlet pipe connected with the air-lift type septic tank 4, wherein each rural domestic sewage house owner 1 is correspondingly connected with the air-lift type septic tank 4, an integrated purification tank 3 is additionally arranged behind each air-lift type septic tank 4, all the air-lift type septic tanks 4 are connected in parallel and are integrally summarized and connected to one integrated purification tank 3, the integrated purification tank 3 is connected with the water outlet pipe, the water outlet pipe is connected with an artificial wetland 2, and the integrated purification tank 3 is provided with a backflow pipeline connected with the air-lift type septic tank 4.
The air stripping type septic tank 4 comprises a horizontal shell 4.1, a water inlet 4.1.1 arranged at the left end of the horizontal shell 4.1, a water outlet 4.1.2 arranged at the right end of the horizontal shell 4.1, two main partition plates 4.2 arranged in the horizontal shell 4.1, wherein the two main partition plates 4.2 divide the horizontal shell 4.1 into three sealed chambers from left to right to respectively form an anaerobic zone 4.3, an aerobic zone 4.4 and a sedimentation zone 4.5, an excrement passing port 4.2.1 is arranged at the near top end of the two main partition plates 4.2, the water inlet 4.1.1 and the water outlet 4.1.2 are both positioned at the near top end of the horizontal shell 4.1, an air stripping automatic excrement outlet device 4.6 is arranged in the anaerobic zone 4.3, a mixed liquid air stripping device 4.7 is arranged in the aerobic zone 4.4, the mixed liquid air stripping device 4.7 is connected with an air inlet 4.6 of a main pipe 4.4.4.6 through a first air stripping pipeline 4.8 and a second air stripping pipeline 4.9, the mixed liquid air stripping device 4.7 is connected with an air inlet 4.6.4.4.6, and an aeration device is connected with an air inlet 4.4.4.4.4.1, and an aeration device is connected with an air inlet 4.4.4.4.4.4.4.4.4.6, and an aeration device is connected with the bottom end of the main pipe 4.4.4.4.4.4.4.4.4.1, and an aeration device is provided with the main tank, and the aeration device is provided with the sewage tank and the sewage tank; the mixed liquid stripping device 4.7 comprises a mixed liquid stripping main pipe 4.7.1 extending into the near bottom end of the aerobic zone 4.4, a rotary flow regulator 4.11 connected with the mixed liquid stripping main pipe 4.7.1, and a backflow pipeline 4.7.2 connected with the rotary flow regulator 4.11, wherein the backflow pipeline 4.7.2 extends into the anaerobic zone 4.3 and is provided with a backflow port 4.7.2.1, the backflow pipeline is communicated with the anaerobic zone 4.3, sewage in the aerobic zone 4.4 is enabled to flow back into the anaerobic zone 4.3 for denitrification, and the first stripping pipeline 4.8 and the second stripping pipeline 4.9 are both provided with vertical sections which are coaxially inserted into the excrement stripping main pipe 4.6.1 and the mixed liquid stripping main pipe 4.7.1.
The integrated purifying tank 3 comprises a horizontal shell 3.1, an inflow port 3.1.1 arranged at the left side of the horizontal shell 3.1 and close to the top, a discharge port 3.1.2 arranged at the right side of the horizontal shell 3.1 and close to the top, a main partition plate 3.2 arranged in the horizontal shell 3.1, the main partition plate 3.2 divides the horizontal shell 3.1 from left to right into two chambers, the left chamber 3.3 is an anaerobic zone, the right chamber 3.4 is an aerobic zone, the left chamber 3.3 comprises a solid-liquid separation tank 3.5 arranged at the close to the top, the rest of the space forms a sludge storage tank 3.6, the solid-liquid separation tank 3.5 comprises a tank body 3.5.1 with an open top, a first overflow port 3.5.2 arranged at the close to the top of the tank body 3.5.1, a mud outlet 3.5.3 arranged at the close to the bottom of the tank body 3.5.1, a first partition plate 3.1 is arranged in the tank body 3.5.1, a second partition plate 3.3.2 divides the tank body 3.5.1 into a first solid-liquid separation tank 3.5, and a second solid-liquid separation tank 3.7.1 from the first overflow port 3.7, and a third overflow port 3.3.1 is communicated with the first overflow port 3.3.3.7 and a second overflow port 3.3.3.1, and a third solid-liquid separation zone 3.3.3.7 is communicated with the first overflow port 3.3.1 and a third solid-liquid separation zone 3.3.3.3.3; the right chamber 3.4 is divided into an upper chamber, a middle chamber, a lower chamber and a lower chamber by a third baffle plate and a fourth baffle plate (3.4.1 and 3.4.2), the upper chamber is a carrier flow chamber 3.10, a slow carrier flow chamber 3.11 and a sedimentation tank 3.12 respectively, a disinfection tank 3.13 is arranged at the position, close to a discharge port 3.1.2, of the right chamber 3.4, a water inlet 3.13.3 is arranged on a tank body of the disinfection tank 3.13 and communicated with the near top end of the sedimentation tank 3.12 (namely, a water inlet is formed in a shared wall of the disinfection tank and the sedimentation tank), the discharge port 3.1.2 is communicated with the disinfection tank 3.13, a fourth overflow port 3.4.1.1 which enables the carrier flow chamber 3.10 and the slow carrier flow chamber 3.11 to be communicated is arranged at the near top end of the third baffle plate 3.4.1, and a water passing channel 3.14 between the slow carrier flow chamber 3.11 and the sedimentation tank 3.12 is formed by the bottom end of the fourth baffle plate 3.4.2 and the horizontal casing 3.1 at intervals; the solid-liquid separation three-region 3.9 is provided with a water outlet 3.9.1 near the top end and is communicated with a carrier flow chamber 3.10 (namely, a water outlet 3.9.1 is formed in a main partition plate 3.2 shared by the solid-liquid separation three-region and the carrier flow chamber 3.10, a quantitative gas stripping water inlet device 3.15 is arranged between the carrier flow chamber 3.10 and the sludge storage tank 3.6, the quantitative gas stripping water inlet device 3.15 comprises a flow control valve 3.15.1, a mixed liquid gas stripping water main pipe 3.15.2 extending into the near bottom end of the sludge storage tank 3.6, a water outlet pipe 3.15.3 communicated with the mixed liquid gas stripping water main pipe 3.15.2, and a water outlet pipe 3.15.3 communicated with the carrier flow chamber 3.10.
The denitrification device 3.16 is arranged in the first solid-liquid separation area 3.7 and comprises a water inlet tank 3.16.1 arranged in the first solid-liquid separation area 3.7, a filler pipe 3.16.2 communicated with the water inlet tank 3.16.1 and a water outlet pipe 3.16.3 connected with the tail end of the filler pipe 3.16.2, the filler pipe 3.16.2 penetrates out of the first solid-liquid separation area 3.7 and stretches into the near bottom end of the sludge storage tank 3.6, the water outlet pipe 3.16.3 is perpendicular to the filler pipe 3.16.2, a plurality of water outlets 3.16.4 are uniformly formed in the wall of the water outlet pipe 3.16.3, and fillers 3.16.5 are arranged in the filler pipe 3.16.2.
An adjustable mixed liquid stripping reflux device 3.17 is arranged between the denitrification device 3.16 and the slow supporter flow chamber 3.11, the adjustable mixed liquid stripping reflux device 3.17 comprises a flow control valve 3.17.1, a mixed liquid stripping main pipe 3.17.2 extending into the near bottom end of the slow supporter flow chamber 3.11, a return pipe 3.17.3 communicated with the mixed liquid stripping main pipe 3.17.2, a return pipe 3.17.3 communicated with a denitrification device water inlet tank 3.16.1, and an observation port is formed in the pipe wall at the upper part of the return pipe 3.17.3.
The quantitative air stripping water inlet device 3.15 and the mixed liquid air stripping main pipes (3.15.2 and 3.17.2) of the adjustable mixed liquid air stripping reflux device 3.17 are respectively provided with a pipeline connecting fan 3.18.
The bottoms of the carrier flow chamber 3.10 and the buffer carrier flow chamber 3.11 are respectively provided with an aerobic aeration device, and the aeration quantity of the two aerobic aeration devices is controlled by a two-way control valve. The aeration pipeline 3.19 of the aerobic aeration device is connected with a fan.
The sterilizing tank 3.13 includes a seal housing 3.13.1 and a sterilizing sheet dosing device 3.13.2 mounted in the seal housing 3.13.1.
Example 2: a new rural domestic sewage denitrification and dephosphorization purification wetland system comprises a rural domestic sewage house owner 1, an air-lifting type septic tank 4 correspondingly connected with a sewage pipe of the rural domestic sewage house owner 1 and a water outlet pipe connected with the air-lifting type septic tank 4, wherein each rural domestic sewage house owner 1 is correspondingly connected with an integrated purification tank 3, the air-lifting type septic tank 4 is additionally arranged behind the integrated purification tank 3, all the integrated purification tanks 3 are connected in parallel and are integrally and collectively connected to one air-lifting type septic tank 4, the air-lifting type septic tank 4 is connected with the water outlet pipe, the water outlet pipe is connected with an artificial wetland 2, the air-lifting type septic tank 4 is provided with a backflow pipeline which is connected with the integrated purification tank 3, the air-lifting type septic tank 4 comprises a horizontal shell 4.1, a water inlet 4.1.1 arranged at the left end of the horizontal shell 4.1, a water outlet 4.1.2 arranged at the right end of the horizontal shell 4.1 and two main partition plates 4.2 arranged in the horizontal shell 4.1, the horizontal shell 4.1 is divided into three sealed chambers from left to right by two main partition plates 4.2, an anaerobic zone 4.3, an aerobic zone 4.4 and a sedimentation zone 4.5 are respectively formed, a manure passing port 4.2.1 is formed near the top end of the two main partition plates 4.2, the water inlet 4.1.1 and the water outlet 4.1.2 are both positioned near the top end of the horizontal shell 4.1, an automatic manure stripping device 4.6 is arranged in the anaerobic zone 4.3, a mixed liquid stripping device 4.7 is arranged in the aerobic zone 4.4, the automatic manure stripping device 4.6 and the mixed liquid stripping device 4.7 are connected with a fan 4.10 air suction port through a first air stripping pipeline 4.8 and a second air stripping pipeline 4.9, the fan 4.10 air outlet is connected with an aeration device 4.11 at the bottom end of the zone 4.4 through an aeration pipeline, the automatic manure stripping device 4.6 comprises a main tube 4.6.1 extending into the near the bottom end of the anaerobic zone 4.3, a main tube 4.1 and a main tube 4.11 flow regulator connected with the manure stripping device through a rotary flow regulator, the manure outlet pipe 4.12 is connected with the manure collecting barrel 4.13; the mixed liquid stripping device 4.7 comprises a mixed liquid stripping main pipe 4.7.1 extending into the near bottom end of the aerobic zone 4.4, a rotary flow regulator 4.11 connected with the mixed liquid stripping main pipe 4.7.1, and a backflow pipeline 4.7.2 connected with the rotary flow regulator 4.11, wherein the backflow pipeline 4.7.2 extends into the anaerobic zone 4.3 and is provided with a backflow port 4.7.2.1, the backflow pipeline is communicated with the anaerobic zone 4.3, sewage in the aerobic zone 4.4 is enabled to flow back into the anaerobic zone 4.3 for denitrification, and the first stripping pipeline 4.8 and the second stripping pipeline 4.9 are both provided with vertical sections which are coaxially inserted into the excrement stripping main pipe 4.6.1 and the mixed liquid stripping main pipe 4.7.1.
The integrated purifying tank 3 comprises a horizontal shell 3.1, an inflow port 3.1.1 arranged at the left side of the horizontal shell 3.1 and close to the top, a discharge port 3.1.2 arranged at the right side of the horizontal shell 3.1 and close to the top, a main partition plate 3.2 arranged in the horizontal shell 3.1, the main partition plate 3.2 divides the horizontal shell 3.1 from left to right into two chambers, the left chamber 3.3 is an anaerobic zone, the right chamber 3.4 is an aerobic zone, the left chamber 3.3 comprises a solid-liquid separation tank 3.5 arranged at the close to the top, the rest of the space forms a sludge storage tank 3.6, the solid-liquid separation tank 3.5 comprises a tank body 3.5.1 with an open top, a first overflow port 3.5.2 arranged at the close to the top of the tank body 3.5.1, a mud outlet 3.5.3 arranged at the close to the bottom of the tank body 3.5.1, a first partition plate 3.1 is arranged in the tank body 3.5.1, a second partition plate 3.3.2 divides the tank body 3.5.1 into a first solid-liquid separation tank 3.5, and a second solid-liquid separation tank 3.7.1 from the first overflow port 3.7, and a third overflow port 3.3.1 is communicated with the first overflow port 3.3.3.7 and a second overflow port 3.3.3.1, and a third solid-liquid separation zone 3.3.3.7 is communicated with the first overflow port 3.3.1 and a third solid-liquid separation zone 3.3.3.3.3; the right chamber 3.4 is divided into an upper chamber, a middle chamber, a lower chamber and a lower chamber by a third baffle plate and a fourth baffle plate (3.4.1 and 3.4.2), the upper chamber is a carrier flow chamber 3.10, a slow carrier flow chamber 3.11 and a sedimentation tank 3.12 respectively, a disinfection tank 3.13 is arranged at the position, close to a discharge port 3.1.2, of the right chamber 3.4, a water inlet 3.13.3 is arranged on a tank body of the disinfection tank 3.13 and communicated with the near top end of the sedimentation tank 3.12 (namely, a water inlet is formed in a shared wall of the disinfection tank and the sedimentation tank), the discharge port 3.1.2 is communicated with the disinfection tank 3.13, a fourth overflow port 3.4.1.1 which enables the carrier flow chamber 3.10 and the slow carrier flow chamber 3.11 to be communicated is arranged at the near top end of the third baffle plate 3.4.1, and a water passing channel 3.14 between the slow carrier flow chamber 3.11 and the sedimentation tank 3.12 is formed by the bottom end of the fourth baffle plate 3.4.2 and the horizontal casing 3.1 at intervals; the solid-liquid separation three-region 3.9 is provided with a water outlet 3.9.1 near the top end and is communicated with a carrier flow chamber 3.10 (namely, a water outlet 3.9.1 is formed in a main partition plate 3.2 shared by the solid-liquid separation three-region and the carrier flow chamber 3.10, a quantitative gas stripping water inlet device 3.15 is arranged between the carrier flow chamber 3.10 and the sludge storage tank 3.6, the quantitative gas stripping water inlet device 3.15 comprises a flow control valve 3.15.1, a mixed liquid gas stripping water main pipe 3.15.2 extending into the near bottom end of the sludge storage tank 3.6, a water outlet pipe 3.15.3 communicated with the mixed liquid gas stripping water main pipe 3.15.2, and a water outlet pipe 3.15.3 communicated with the carrier flow chamber 3.10.
The denitrification device 3.16 is arranged in the first solid-liquid separation area 3.7 and comprises a water inlet tank 3.16.1 arranged in the first solid-liquid separation area 3.7, a filler pipe 3.16.2 communicated with the water inlet tank 3.16.1 and a water outlet pipe 3.16.3 connected with the tail end of the filler pipe 3.16.2, the filler pipe 3.16.2 penetrates out of the first solid-liquid separation area 3.7 and stretches into the near bottom end of the sludge storage tank 3.6, the water outlet pipe 3.16.3 is perpendicular to the filler pipe 3.16.2, a plurality of water outlets 3.16.4 are uniformly formed in the wall of the water outlet pipe 3.16.3, and fillers 3.16.5 are arranged in the filler pipe 3.16.2.
An adjustable mixed liquid stripping reflux device 3.17 is arranged between the denitrification device 3.16 and the slow supporter flow chamber 3.11, the adjustable mixed liquid stripping reflux device 3.17 comprises a flow control valve 3.17.1, a mixed liquid stripping main pipe 3.17.2 extending into the near bottom end of the slow supporter flow chamber 3.11, a return pipe 3.17.3 communicated with the mixed liquid stripping main pipe 3.17.2, a return pipe 3.17.3 communicated with a denitrification device water inlet tank 3.16.1, and an observation port is formed in the pipe wall at the upper part of the return pipe 3.17.3.
The quantitative air stripping water inlet device 3.15 and the mixed liquid air stripping main pipes (3.15.2 and 3.17.2) of the adjustable mixed liquid air stripping reflux device 3.17 are respectively provided with a pipeline connecting fan 3.18.
The bottoms of the carrier flow chamber 3.10 and the buffer carrier flow chamber 3.11 are respectively provided with an aerobic aeration device, and the aeration quantity of the two aerobic aeration devices is controlled by a two-way control valve. The aeration pipeline 3.19 of the aerobic aeration device is connected with a fan.
The sterilizing tank 3.13 includes a seal housing 3.13.1 and a sterilizing sheet dosing device 3.13.2 mounted in the seal housing 3.13.1.
Example 3: referring to embodiment 1 or 2, 1 piece of auxiliary baffle plate 4.14 is arranged in the anaerobic zone 4.3 of the gas stripping type septic tank 4, the anaerobic zone 4.3 is divided into an anaerobic zone I4.15 and an anaerobic zone II 4.16, the upper near top ends of the auxiliary baffle plates 4.14 are respectively provided with a manure passing opening 4.14.1, the gas stripping automatic manure outlet device 4.6 is arranged in the anaerobic zone II 4.16, and the reflux pipeline 4.7.2 of the mixed liquid gas stripping device 4.7 extends into the anaerobic zone I4.15 and the anaerobic zone II 4.16 and is respectively provided with a reflux opening 4.7.2.1.
In the above embodiment 1, 2 or 3, the rotary flow regulator 4.11 includes a top sealed liner tube 4.11.1, a rotary sleeve tube 4.11.2 sleeved on the liner tube 4.11.1, a connecting joint 4.11.3 disposed at the bottom end of the liner tube 4.11.1, a water outlet 4.11.1.1 (the connecting joint may be a hoop) provided on the side wall of the liner tube 4.11.1, and an adjusting hole 4.11.2.1 provided on the side wall of the rotary sleeve tube 4.11.2 corresponding to the water outlet 4.11.1.1, and the reflux amount is adjusted by the overlap ratio of the adjusting hole 4.11.2.1 and the water outlet 4.11.1.1 on the rotary sleeve tube 4.11.2.
In the above embodiment 1, 2 or 3, the main and auxiliary partition boards (4.2, 4.14) of the air-lift septic tank 4 are provided with downward bent pipes at the manure passing openings, the top end of the anaerobic zone 4.3 is provided with an air outlet 4.3.1, and the top end of the horizontal housing is provided with an observation manhole.
In the above examples 1, 2 or 3, the suspended filler was charged into the aerobic zone 4.4.
In the above embodiments 1, 2 or 3, the horizontal housing 4.1 of the air-lift type septic tank 4 is assembled in a male-female mold or drawer type.
In the above embodiments 1, 2 or 3, the horizontal housing 4.1 of the air-lift septic tank 4 is injection molded.
In the above embodiments 1 or 2 or 3, the horizontal housing 4.1 of the air-lift septic tank 4 is provided with a water level gauge or a float gauge.
In the above embodiment 1 or 2 or 3, the fan 4.10 of the air-stripping septic tank 4 passes through the first air-stripping pipeline 4.8, the second air-stripping pipeline 4.9 and the aeration pipeline 4.11, wherein the first air-stripping pipeline 4.8 and the second air-stripping pipeline 4.9 are connected with the air suction port of the fan 4.10, the aeration pipeline 4.11 is connected with the air outlet of the fan 4.10, so that not only an aerobic aeration function is realized, but also mixed liquid air-stripping reflux can be realized, the mixed liquid air-stripping reflux is performed to the reflux pipeline 4.7.2, then the mixed liquid air-stripping reflux is performed to the anaerobic zone 4.3 through the reflux pipeline 4.7.2, the water outlet of the reflux pipeline 4.7.2 is provided with the rotary flow regulator 4.11, the reflux quantity can be regulated, sewage flows into the sedimentation zone 4.5 after being treated in the anaerobic zone 4.3 and the aerobic zone 4.4, static sedimentation and mud-water separation are performed, and finally the sewage is discharged.
In the above embodiment 1, 2 or 3, the material of the main partition 3.2 of the integrated purification tank 3 may be glass fiber reinforced plastic. The fourth diaphragm 3.4.2 may be glass fiber reinforced plastic. The third partition 3.4.1 between the slow carrier flow chamber 3.11 and the carrier flow chamber 3.10 may be integrally injection molded. The slow supporter flow chamber 3.11 and the supporter flow chamber 3.10 are provided with the supporter, and the number of the supporter in the slow supporter flow chamber 3.11 is larger than that in the supporter flow chamber 3.10. The horizontal housing 3.1 of the integrated purification tank 3 can be formed by integral injection molding. The left and right sides of the top end of the horizontal shell 3.1 can be respectively provided with an observation manhole.
The artificial wetland is a technology for treating sewage and sludge by utilizing the physical, chemical and biological triple synergistic effects of soil, artificial medium, plants and microorganisms in the process of flowing sewage and sludge along a certain direction by manually constructing and controlling the ground similar to the swamp, and controlling the sewage and sludge to be dosed on the constructed wetland. The action mechanism comprises adsorption, detention, filtration, oxidation reduction, precipitation, microbial decomposition, conversion, plant shielding, residue accumulation, transpiration moisture and nutrient absorption and the action of various animals. The constructed wetland is a comprehensive ecological system.
Claims (6)
1. A new rural domestic sewage denitrification and dephosphorization purification wetland system comprises rural domestic sewage households, an air-lift septic tank correspondingly connected with sewage pipes of the rural domestic sewage households and a water outlet pipe connected with the air-lift septic tank, and is characterized in that each rural domestic sewage householder is correspondingly connected with the air-lift septic tank, an integrated purification tank is additionally arranged behind the air-lift septic tank, all the air-lift septic tanks are connected in parallel and are integrally and collectively connected to one integrated purification tank, the integrated purification tank is connected with the water outlet pipe, the water outlet pipe is connected with the artificial wetland, the integrated purification tank is provided with a backflow pipeline which is connected with the air-lift septic tank, the integrated purification tank comprises a horizontal shell, an inflow port which is arranged at the near top end of the left side of the horizontal shell, a discharge port which is arranged at the near top end of the right side of the horizontal shell, and a main partition board which is arranged in the horizontal shell, the main partition plate divides the horizontal shell into two chambers from left to right, the left chamber is an anaerobic zone, the right chamber is an aerobic zone, the horizontal shell is characterized in that the left chamber comprises a solid-liquid separation tank arranged near the top end, the rest space forms a sludge storage tank, the solid-liquid separation tank comprises a tank body with an open top end, a first overflow port arranged near the top end of the tank body, and a sludge outlet arranged near the bottom end of the tank body, a first partition plate and a second partition plate are arranged in the tank body to divide the tank body into a first solid-liquid separation zone, a second solid-liquid separation zone and a third solid-liquid separation zone from left to right, a second overflow port and a third overflow port which are used for enabling adjacent areas to be communicated are arranged on the first partition plate and the second partition plate, and the inflow port is communicated with the first fixed separation zone; the right chamber is divided into an upper chamber, a middle chamber, a lower chamber and a settling tank by a third partition plate and a fourth partition plate, a sterilizing tank is arranged at a position close to a discharge port of the right chamber, a water inlet is arranged on a tank body of the sterilizing tank and communicated with the near top end of the settling tank, the discharge port is communicated with the sterilizing tank, a fourth overflow port which enables the support flow chamber and the slow support flow chamber to be communicated is arranged at the near top end of the third partition plate, and a water passing channel between the slow support flow chamber and the settling tank is formed by the bottom end of the fourth partition plate and the horizontal shell at intervals; the solid-liquid separation three-zone near top sets up delivery port intercommunication supporter flow chamber, be provided with quantitative air lift water inlet unit between supporter flow chamber and the sludge storage groove, be provided with adjustable air lift reflux unit between denitrification facility and the slow supporter flow chamber, supporter flow chamber and slow supporter flow chamber all are provided with good oxygen aeration equipment, be provided with denitrification facility in the solid-liquid separation one-zone including arranging into basin in the solid-liquid separation one-zone, with the filler pipe of going into the water tank intercommunication and with filler pipe end-to-end connection's outlet pipe, the filler pipe wears out from the solid-liquid separation one-zone and stretches into the sludge storage groove near bottom, the outlet pipe sets up with filler pipe is perpendicular, evenly offered a plurality of delivery ports on the outlet pipe wall, be provided with the filler in the filler pipe.
2. The novel rural domestic sewage denitrification and dephosphorization purification wetland system according to claim 1 is characterized in that an adjustable mixed liquid gas stripping reflux device is arranged between the denitrification device and the slow carrier flow chamber, the adjustable mixed liquid gas stripping reflux device comprises a flow control valve, a mixed liquid gas stripping main pipe extending into the near bottom end of the slow carrier flow chamber, a reflux pipe communicated with the mixed liquid gas stripping main pipe, the reflux pipe is communicated to a denitrification device water inlet tank, and an observation port is formed in the pipe wall at the upper part of the reflux pipe.
3. The novel rural domestic sewage denitrification and dephosphorization purification wetland system according to claim 1, wherein the disinfection tank comprises a sealed shell and a disinfection sheet quantitative feeding device arranged in the sealed shell.
4. A new rural domestic sewage denitrification and dephosphorization purification wetland system comprises rural domestic sewage households, a gas-stripping type septic tank and a water outlet pipe, wherein the gas-stripping type septic tank is correspondingly connected with the sewage pipes of the rural domestic sewage households, and the water outlet pipe is connected with the gas-stripping type septic tank; the right chamber is divided into an upper chamber, a middle chamber, a lower chamber and a settling tank by a third partition plate and a fourth partition plate, a sterilizing tank is arranged at a position close to a discharge port of the right chamber, a water inlet is arranged on a tank body of the sterilizing tank and communicated with the near top end of the settling tank, the discharge port is communicated with the sterilizing tank, a fourth overflow port which enables the support flow chamber and the slow support flow chamber to be communicated is arranged at the near top end of the third partition plate, and a water passing channel between the slow support flow chamber and the settling tank is formed by the bottom end of the fourth partition plate and the horizontal shell at intervals; the solid-liquid separation three-zone near top sets up delivery port intercommunication supporter flow chamber, be provided with quantitative air lift water inlet unit between supporter flow chamber and the sludge storage groove, be provided with adjustable air lift reflux unit between denitrification facility and the slow supporter flow chamber, supporter flow chamber and slow supporter flow chamber all are provided with good oxygen aeration equipment, be provided with denitrification facility in the solid-liquid separation one-zone including arranging into basin in the solid-liquid separation one-zone, with the filler pipe of going into the water tank intercommunication and with filler pipe end-to-end connection's outlet pipe, the filler pipe wears out from the solid-liquid separation one-zone and stretches into the sludge storage groove near bottom, the outlet pipe sets up with filler pipe is perpendicular, evenly offered a plurality of delivery ports on the outlet pipe wall, be provided with the filler in the filler pipe.
5. The novel rural domestic sewage denitrification and dephosphorization purification wetland system according to claim 4 is characterized in that an adjustable mixed liquid stripping reflux device is arranged between the denitrification device and the slow carrier flow chamber, the adjustable mixed liquid stripping reflux device comprises a flow control valve, a mixed liquid stripping main pipe extending into the near bottom end of the slow carrier flow chamber, a reflux pipe communicated with the mixed liquid stripping main pipe, the reflux pipe is communicated to a denitrification device water inlet tank, and an observation port is formed in the pipe wall at the upper part of the reflux pipe.
6. The novel rural domestic sewage denitrification and dephosphorization purification wetland system according to claim 4, wherein the disinfection tank comprises a sealed shell and a disinfection sheet quantitative feeding device arranged in the sealed shell.
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| CN110342748A (en) * | 2019-07-24 | 2019-10-18 | 杭州李春环境科技有限公司 | Toilet sewage purifier and method |
| CN111777259B (en) * | 2020-03-08 | 2024-05-31 | 哈尔滨工业大学 | An integrated small-scale sewage treatment device and treatment method |
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| CN206173173U (en) * | 2016-09-14 | 2017-05-17 | 广东粤海水务股份有限公司 | Rural sewage dephosphorization denitrogenation sewage treatment plant that no mud discharged |
| CN107399884A (en) * | 2017-09-21 | 2017-11-28 | 凌志环保股份有限公司 | A kind of new rural village domestic sewage denitrifying-dephosphorizing cleaning system |
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| CN107814439A (en) | 2018-03-20 |
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