CN110422973A - A kind of land disposal method of domestic sewage in rural areas - Google Patents
A kind of land disposal method of domestic sewage in rural areas Download PDFInfo
- Publication number
- CN110422973A CN110422973A CN201910852888.4A CN201910852888A CN110422973A CN 110422973 A CN110422973 A CN 110422973A CN 201910852888 A CN201910852888 A CN 201910852888A CN 110422973 A CN110422973 A CN 110422973A
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- Prior art keywords
- sewage
- filtering ponds
- bottom plate
- screw rod
- filtering
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a kind of land disposal methods of domestic sewage in rural areas, are related to technical field of sewage.The present invention includes filtering ponds, two transverse slats are symmetrically fixed at the top of filtering ponds, a screw rod is rotatably connected between transverse slat bottom and filtering bottom of pond portion, screw rod week, side was threaded with lifting bottom plate, lifting bottom plate one side is slidably connected with filter plate side, is fixedly connected between transverse slat bottom and filtering bottom of pond portion there are three vertical bar, lifting bottom plate is slidably connected with vertical bar week side, one transverse slat bottom is fixedly installed with motor, and motor output shaft one end is fixedly connected with screw rod one end.The present invention passes through transverse slat, screw rod, the design for going up and down bottom plate, vertical bar and motor, gravel in easy cleaning filtering ponds, improve the cleaning efficiency of filtering ponds, the gravel for avoiding the filtering bottom of pond portion accumulation of existing waste water soil treatment system is difficult to clear up, labor intensity of workers is larger, and the lower problem of cleaning efficiency of filtering ponds.
Description
Technical field
The invention belongs to technical field of sewage, more particularly to a kind of land disposal method of domestic sewage in rural areas.
Background technique
For a long time, the emphasis of China's waste water control is concentrated mainly on city domestic sewage and industrial point-source pollution, and wide
The water pollution problems in large village area is not paid attention to adequately, and Rural Water Pollution is serious.The typically no drainage ditch in rural area
Road and sewage disposal system, wastewater treatment rate is low, and most of sanitary sewage all arbitrarily discharges, and is directly entered river, or discharge room
Outer vacant lot successor meaning permeates the ground, and small part after septic tank simple process through permeating the ground, serious polluted river water.So raw
Sewage living has become one of the primary pollution source of current rural area water pollution, keeps rural area environmental aspect worsening, makes agriculture
Village's environmental quality is decreased obviously, and is directly threaten the living environment and health of the vast farmers masses, is constrained rural economy
Sound development.
Waste water soil treatment system can be with is defined as: using soil-microorganism-botanical system terrestrial ecosystems from
My regulatory mechanism and the comprehensive purifying function treatment sanitary sewage to pollutant, improve water quality in various degree, realize useless
Recycling of water resource and innoxious perennially ecological systems engineering.But the filtering bottom of pond portion of existing waste water soil treatment system accumulates
Gravel be difficult to clear up, worker need it is lower clear up gravel to filtering bottom of pond portion, labor intensity is larger, and the cleaning efficiency of filtering ponds
It is lower.
Summary of the invention
The purpose of the present invention is to provide a kind of land disposal methods of domestic sewage in rural areas, pass through the cross in filtering ponds
Plate, screw rod, the design for going up and down bottom plate, vertical bar and motor solve the filtering bottom of pond portion accumulation of existing waste water soil treatment system
Gravel be difficult to clear up, labor intensity of workers is larger, and the lower problem of cleaning efficiency of filtering ponds.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions:
The present invention is a kind of land disposal method of domestic sewage in rural areas, comprising the following steps:
The filtering of SS01 sewage: the sanitary sewage at each family is entered in filtering ponds by pipeline, and it is dirty that filtering ponds filter out life
Gravel in water；
The hydrolysis of SS02 sewage: filtered sanitary sewage flows into hydrolytic tank, and the hydrolytic bacteria, acidification bacterium in hydrolytic tank will be dirty
Insoluble hydrolysis of organic matter is dissolved organic matter in water, converts easily biological-degradable for the macromolecular substances of difficult for biological degradation
Small-molecule substance；
The oxidation of SS03 sewage: the sewage after hydrolysis flows into oxidation pond, and sewage comes into full contact with the biomembrane in oxidation pond,
By the new modernity of microorganism on biomembrane, except the organic matter in decontaminated water；
The precipitating of SS04 sewage: the sewage after oxidation flows into sedimentation basin, the flocky sludge drop generated after aoxidizing in sewage
Fall on the bottom of sedimentation basin；
The ecological purification of SS05 sewage: oettIed sewage flows into artificial swamp, and artificial swamp purifies in sewage again
Organic matter；
The cleaning of SS06 filtering ponds: the gravel for filtering bottom of pond portion accumulation is transported to the Chi Kou of filtering ponds by lifting bottom plate, so
The gravel on lifting bottom plate is cleaned up afterwards.
Further, it is fixedly connected with filter plate between the filtering ponds inner wall, is symmetrically fixed at the top of the filtering ponds
Two transverse slats, are rotatably connected to a screw rod between the transverse slat bottom and filtering bottom of pond portion, screw rod week side is threadedly coupled
Have lifting bottom plate, the lifting bottom plate one side is slidably connected with filter plate side, the transverse slat bottom and filtering bottom of pond portion it
Between be fixedly connected there are three vertical bar, the lifting bottom plate is slidably connected with vertical bar week side, the lifting bottom panel side with filter
Pond inner wall is slidably connected, and a transverse slat bottom is fixedly installed with motor, and described motor output shaft one end is fixed with screw rod one end
Connection.
Further, setting aerator and composite filling, microorganism are formed on composite filling inside the oxidation pond
Biomembrane, aerator provide oxygen for microorganism.
Further, sludge pump is arranged in the precipitating bottom of pond portion, and sludge pump pumps the sludge for precipitating bottom of pond portion to oxidation
In pond, utilize cyclic microorganism.
Further, the artificial swamp is by arbor, shrub or crops, herbaceous plant, moss and fern, microorganism
The miscellaneous raw ecosystem system of the bio-diversity being integrated.
Further, comprising the following steps:
The rotation of SS061 motor control screw rod, screw rod drive lifting bottom plate to move up and down, and make to go up and down bottom plate along in filtering ponds
Wall sliding, the gravel that lifting bottom plate falls filter plate are transported to the Chi Kou of filtering ponds；
SS062 manual cleaning is fallen to go up and down the gravel on bottom plate, and motor controls screw rod again and lifting bottom plate is driven to drop to
Filter tank bottom.
The invention has the following advantages: the present invention by transverse slat in filtering ponds, screw rod, lifting bottom plate, vertical bar and
The design of motor, the rotation of motor control screw rod, screw rod drive lifting bottom plate to move up and down, and make to go up and down bottom plate along filtering ponds inner wall
Sliding, the gravel that lifting bottom plate falls filter plate are transported to the Chi Kou of filtering ponds, and manual cleaning is fallen to go up and down the sand on bottom plate
Gravel, motor control screw rod again and lifting bottom plate are driven to drop to filtering bottom of pond portion, and the gravel in easy cleaning filtering ponds does not need
To in filtering ponds under worker, the cleaning efficiency of filtering ponds is improved, the filtering ponds bottom of existing waste water soil treatment system is avoided
The gravel of portion's accumulation is difficult to clear up, and labor intensity of workers is larger, and the lower problem of cleaning efficiency of filtering ponds.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of flow diagram of the land disposal method of domestic sewage in rural areas；
Fig. 2 is the structural schematic diagram of filtering ponds；
Fig. 3 is the structural schematic diagram inside filtering ponds；
In attached drawing, parts list represented by the reference numerals are as follows:
1- filtering ponds, 101- filter plate, 102- transverse slat, 103- screw rod, 104- go up and down bottom plate, 105- vertical bar, 106- motor.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-3 is please referred to, the present invention is a kind of land disposal method of domestic sewage in rural areas, comprising the following steps:
The filtering of SS01 sewage: the sanitary sewage at each family is entered in filtering ponds 1 by pipeline, and filtering ponds 1 filter out life
Gravel in sewage removes the sundries of bulky grain in sanitary sewage；
The hydrolysis of SS02 sewage: filtered sanitary sewage flows into hydrolytic tank, and the hydrolytic bacteria, acidification bacterium in hydrolytic tank will be dirty
Insoluble hydrolysis of organic matter is dissolved organic matter in water, converts easily biological-degradable for the macromolecular substances of difficult for biological degradation
Small-molecule substance facilitates dirty Organic substance in water to enter in oxidation pond and decomposes；
The oxidation of SS03 sewage: the sewage after hydrolysis flows into oxidation pond, the biomembrane in sewage and oxidation pond after oxygenation
It comes into full contact with, by the new modernity of microorganism on biomembrane, except the organic matter in decontaminated water；
The precipitating of SS04 sewage: the sewage after oxidation flows into sedimentation basin, the flocky sludge drop generated after aoxidizing in sewage
Fall on the bottom of sedimentation basin；
The ecological purification of SS05 sewage: oettIed sewage flows into artificial swamp, and artificial swamp purifies in sewage again
Organic matter；
The cleaning of SS06 filtering ponds 1: the gravel that 1 bottom of filtering ponds accumulates is transported to the pond of filtering ponds 1 by lifting bottom plate 104
Mouthful, then clean up the gravel on lifting bottom plate 104.
Wherein as Figure 2-3, filter plate 101 is fixedly connected between 1 inner wall of filtering ponds, 1 top of filtering ponds is symmetrical solid
It is fixed there are two transverse slat 102, be rotatably connected to a screw rod 103,103 weeks sides of screw rod between 1 bottom of 102 bottom of transverse slat and filtering ponds
Be threaded with lifting bottom plate 104, lifting 104 one side of bottom plate be slidably connected with 101 side of filter plate, 102 bottom of transverse slat and
It is fixedly connected between 1 bottom of filtering ponds there are three vertical bar 105, lifting 105 weeks sides of bottom plate 104 and vertical bar are slidably connected, go up and down
104 side of bottom plate is slidably connected with 1 inner wall of filtering ponds, and 102 bottom of a transverse slat is fixedly installed with motor 106,106 output shaft of motor
One end is fixedly connected with 103 one end of screw rod, and motor 106 is electrically connected by conducting wire and existing PLC controller, and all electricity consumptions are equal
It is that external power supply provides.
Wherein, setting aerator and composite filling, microorganism form biomembrane on composite filling inside oxidation pond, expose
Device of air provides oxygen for microorganism.
Wherein, sludge pump is arranged in precipitating bottom of pond portion, and the sludge for precipitating bottom of pond portion is pumped to oxidation pond, made micro- by sludge pump
Biological cycle utilizes.
Wherein, artificial swamp is integrated by arbor, shrub or crops, herbaceous plant, moss and fern, microorganism
The miscellaneous raw ecosystem system of bio-diversity.
Wherein as Figure 2-3, comprising the following steps:
SS061 motor 106 controls screw rod 103 and rotates, and screw rod 103 drives lifting bottom plate 104 to move up and down, and makes to go up and down bottom plate
104 slide along 1 inner wall of filtering ponds, and the gravel that filter plate 101 filters out is transported to the Chi Kou of filtering ponds 1 by lifting bottom plate 104；
SS062 manual cleaning falls to go up and down the gravel on bottom plate 104, and motor 106 controls screw rod 103 again and drives lifting bottom plate
104 drop to 1 bottom of filtering ponds.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (6)
1. a kind of land disposal method of domestic sewage in rural areas, which comprises the following steps:
The filtering of SS01 sewage: the sanitary sewage at each family is entered in filtering ponds (1) by pipeline, and filtering ponds (1) filter out life
Gravel in sewage；
The hydrolysis of SS02 sewage: filtered sanitary sewage flows into hydrolytic tank, and the hydrolytic bacteria, acidification bacterium in hydrolytic tank will be in sewage
Insoluble hydrolysis of organic matter is dissolved organic matter, converts small point of easily biological-degradable for the macromolecular substances of difficult for biological degradation
Sub- substance；
The oxidation of SS03 sewage: the sewage after hydrolysis flows into oxidation pond, and sewage comes into full contact with the biomembrane in oxidation pond, passes through
The new modernity of microorganism on biomembrane, except the organic matter in decontaminated water；
The precipitating of SS04 sewage: the sewage after oxidation flows into sedimentation basin, and the flocky sludge generated after aoxidizing in sewage drops to
The bottom of sedimentation basin；
The ecological purification of SS05 sewage: oettIed sewage flows into artificial swamp, and artificial swamp purifies organic in sewage again
Object；
The cleaning of SS06 filtering ponds (1): the gravel that filtering ponds (1) bottom accumulates is transported to filtering ponds (1) by lifting bottom plate (104)
Chi Kou, then clean up lifting bottom plate (104) on gravel.
2. a kind of land disposal method of domestic sewage in rural areas according to claim 1, which is characterized in that the filtering ponds
(1) it is fixedly connected between inner wall filter plate (101), is symmetrically fixed with two transverse slats (102), institute at the top of the filtering ponds (1)
It states and is rotatably connected to a screw rod (103) between transverse slat (102) bottom and filtering ponds (1) bottom, all side spiral shells of the screw rod (103)
Line is connected with lifting bottom plate (104), and lifting bottom plate (104) one side is slidably connected with filter plate (101) side, the cross
Vertical bar (105), the lifting bottom plate (104) and vertical bar there are three being fixedly connected between plate (102) bottom and filtering ponds (1) bottom
(105) all sides are slidably connected, and the lifting bottom plate (104) side is slidably connected with filtering ponds (1) inner wall, a transverse slat
(102) bottom is fixedly installed with motor (106), and described motor (106) output shaft one end is fixedly connected with screw rod (103) one end.
3. a kind of land disposal method of domestic sewage in rural areas according to claim 1, which is characterized in that the oxidation pond
Inside setting aerator and composite filling, microorganism form biomembrane on composite filling, and aerator provides for microorganism
Oxygen.
4. a kind of land disposal method of domestic sewage in rural areas according to claim 1, which is characterized in that the sedimentation basin
Sludge pump is arranged in bottom, and sludge pump pumps the sludge for precipitating bottom of pond portion to oxidation pond, utilizes cyclic microorganism.
5. a kind of land disposal method of domestic sewage in rural areas according to claim 1, which is characterized in that the Manual moist
Ground is primary for the miscellaneous life of bio-diversity being integrated by arbor, shrub or crops, herbaceous plant, moss and fern, microorganism
State system.
6. a kind of land disposal method of domestic sewage in rural areas according to claim 2, which is characterized in that including following step
It is rapid:
SS061 motor (106) controls screw rod (103) rotation, and screw rod (103) drives lifting bottom plate (104) to move up and down, makes to go up and down
Bottom plate (104) is slided along filtering ponds (1) inner wall, and the gravel that filter plate (101) filters out was transported to by lifting bottom plate (104)
The Chi Kou in filter tank (1)；
SS062 manual cleaning falls to go up and down the gravel on bottom plate (104), and motor (106) controls screw rod (103) again and drives lifting bottom
Plate (104) drops to filtering ponds (1) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910852888.4A CN110422973A (en) | 2019-09-10 | 2019-09-10 | A kind of land disposal method of domestic sewage in rural areas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910852888.4A CN110422973A (en) | 2019-09-10 | 2019-09-10 | A kind of land disposal method of domestic sewage in rural areas |
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| Publication Number | Publication Date |
|---|---|
| CN110422973A true CN110422973A (en) | 2019-11-08 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910852888.4A Pending CN110422973A (en) | 2019-09-10 | 2019-09-10 | A kind of land disposal method of domestic sewage in rural areas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112811513A (en) * | 2021-01-16 | 2021-05-18 | 张洋保 | Sewage treatment tank |
| CN114057327A (en) * | 2021-11-23 | 2022-02-18 | 河海大学设计研究院有限公司 | River-entering pollution discharge treatment device |
| CN114212963A (en) * | 2021-11-19 | 2022-03-22 | 山东高速工程建设集团有限公司 | Recycling device and recycling method for highway construction waste slurry |
| CN115466003A (en) * | 2022-06-10 | 2022-12-13 | 农业农村部环境保护科研监测所 | Cascaded many first symbiotic systems based on rural black grey water coprocessing utilizes |
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| JP2014231042A (en) * | 2013-05-29 | 2014-12-11 | 学校法人日本大学 | Artificial wetland for water quality improvement |
| CN206417977U (en) * | 2017-01-16 | 2017-08-18 | 深圳市碧园环保技术有限公司 | A kind of processing system for domestic sewage in rural areas |
| CN206996058U (en) * | 2017-07-14 | 2018-02-13 | 佛山科学技术学院 | Wastewater treatment desilting structures |
| CN207532874U (en) * | 2017-08-22 | 2018-06-26 | 安徽康源环保科技有限公司 | A kind of sewage filter device |
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2019
- 2019-09-10 CN CN201910852888.4A patent/CN110422973A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014231042A (en) * | 2013-05-29 | 2014-12-11 | 学校法人日本大学 | Artificial wetland for water quality improvement |
| CN206417977U (en) * | 2017-01-16 | 2017-08-18 | 深圳市碧园环保技术有限公司 | A kind of processing system for domestic sewage in rural areas |
| CN206996058U (en) * | 2017-07-14 | 2018-02-13 | 佛山科学技术学院 | Wastewater treatment desilting structures |
| CN207532874U (en) * | 2017-08-22 | 2018-06-26 | 安徽康源环保科技有限公司 | A kind of sewage filter device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112811513A (en) * | 2021-01-16 | 2021-05-18 | 张洋保 | Sewage treatment tank |
| CN114212963A (en) * | 2021-11-19 | 2022-03-22 | 山东高速工程建设集团有限公司 | Recycling device and recycling method for highway construction waste slurry |
| CN114212963B (en) * | 2021-11-19 | 2023-09-15 | 山东高速工程建设集团有限公司 | Recycling device and recycling method for waste slurry in highway construction |
| CN114057327A (en) * | 2021-11-23 | 2022-02-18 | 河海大学设计研究院有限公司 | River-entering pollution discharge treatment device |
| CN114057327B (en) * | 2021-11-23 | 2024-03-05 | 河海大学设计研究院有限公司 | River entering sewage disposal device |
| CN115466003A (en) * | 2022-06-10 | 2022-12-13 | 农业农村部环境保护科研监测所 | Cascaded many first symbiotic systems based on rural black grey water coprocessing utilizes |
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Application publication date: 20191108 |
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