CN110563176A - landfill leachate stage filtration processing system - Google Patents
landfill leachate stage filtration processing system Download PDFInfo
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- CN110563176A CN110563176A CN201910876707.1A CN201910876707A CN110563176A CN 110563176 A CN110563176 A CN 110563176A CN 201910876707 A CN201910876707 A CN 201910876707A CN 110563176 A CN110563176 A CN 110563176A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Abstract
The scheme discloses a landfill leachate stage filtration processing system in the technical field of garbage treatment, including microfiltration filter, quartz sand filter, receive filter equipment, reverse osmosis unit and microcomputer control ware, be equipped with the electric measurement fluviograph among microfiltration filter, quartz sand filter, receive filter equipment, the reverse osmosis unit, be equipped with water pump and double-flow solenoid valve between microfiltration filter, quartz sand filter, receive filter equipment, the reverse osmosis unit in proper order, electric measurement fluviograph, water pump and double-flow solenoid valve all are connected with microcomputer control ware electricity. The graded filtering treatment system comprises a microfiltration filter, a quartz sand filter, a nanofiltration device and a reverse osmosis device, so that sludge, impurities and other harmful substances contained in the leachate are gradually removed from large to small, the low sludge and purification of the domestic garbage leachate are realized, and the domestic garbage leachate reaches the discharge standard.
Description
Technical Field
the invention belongs to the technical field of garbage treatment, and particularly relates to a garbage leachate grading filtration treatment system.
background
with the increasing urban population and the improving living conditions, the continuous increase of the production of domestic garbage brings a serious challenge to garbage disposal. At present, domestic garbage is mainly treated by a landfill method, but landfill generates a large amount of landfill leachate, the landfill leachate is high ammonia nitrogen organic matter sewage with complex components, and if the high ammonia nitrogen organic matter sewage is directly discharged into the environment without treatment, serious environmental pollution can be caused.
The traditional percolate treatment method generally comprises a physical and chemical method and a biological method. At present, the environment protection control force is increased by the country, a stricter landfill leachate pollutant discharge standard is established in the domestic garbage landfill pollution control standard, and higher requirements are put forward for landfill leachate treatment, so that the traditional treatment mode is difficult to meet the requirements. Based on the method, the applicant optimizes the traditional process and adds a graded filtering process, and the main process flow is anaerobic, nitrification and filtering, so that the discharge of the percolate reaches the standard.
disclosure of Invention
the invention aims to provide a graded filtering treatment system for garbage leachate, which is used for filtering through the graded filtering treatment system, so that low-sludge and purification of domestic garbage leachate are realized, and the discharge standard is reached.
in order to solve the above problems, the present invention provides the following solutions: a graded filtration treatment system for landfill leachate comprises a microfiltration filter, a quartz sand filter, a nanofiltration device, a reverse osmosis device and a microcomputer controller, wherein the microfiltration filter comprises a microfiltration tank, a microfiltration filter and a microfiltration product water tank, the microfiltration filter consists of a filter cylinder made of stainless steel wires and a drain pipe A, and one end of the drain pipe A, which is far away from the filter cylinder, is positioned in the microfiltration product water tank;
The quartz sand filter comprises a quartz sand water production tank, a filter tank and a quartz sand layer arranged in the filter tank, wherein the top end and the bottom end of the filter tank are respectively provided with a water inlet pipe A and a water outlet pipe B, one end of the water inlet pipe A is positioned in the micro-filtration water production tank, the other end of the water inlet pipe A is connected with a water distributor, a water distribution plate is arranged below the water distributor, and the free end of the water outlet pipe B is positioned in the quartz sand water production tank;
The nanofiltration device comprises a nanofiltration tank and a nanofiltration water production tank, wherein a nanofiltration membrane and a water-stop sheet are arranged in the nanofiltration tank, the water-stop sheet is positioned right above the nanofiltration membrane, a plurality of uniformly arranged water distribution holes are formed in the water-stop sheet, the upper end and the lower end of the nanofiltration tank are respectively provided with a water inlet pipe B and a water outlet pipe C, the free end of the water inlet pipe B is positioned in the quartz sand water production tank, and the free end of the water outlet pipe C is positioned in the nanofiltration water production tank;
the reverse osmosis device comprises a reverse osmosis box and a reverse osmosis membrane arranged in the reverse osmosis box, the reverse osmosis box is provided with a water inlet pipe C, a water outlet pipe D and a water outlet pipe E, the free end of the water inlet pipe C is positioned in the nanofiltration water production tank, and the water outlet pipe D and the water outlet pipe E are positioned above and below the reverse osmosis membrane;
The micro-filtration water tank, the filter tank, the nano filter tank and the reverse osmosis tank are all provided with an electric measuring water level meter, the water inlet pipe A, B, C and the water outlet pipe A, B, C are all provided with a water pump and a double-flow electromagnetic valve, and the electric measuring water level meter, the water pump and the double-flow electromagnetic valve are all electrically connected with the microcomputer controller.
The working principle of the scheme is as follows: discharging the nitrified mud-water mixture into a microfiltration tank, pumping the percolate filtered by a filter cartridge into a microfiltration production water tank by a water pump, wherein the filter cartridge is made of stainless steel wires and can intercept larger particles, suspended matters and biological strains, pumping the percolate in the microfiltration production water tank into a filter, uniformly spraying the percolate on a quartz sand layer by a water distributor and a water diversion plate, filtering the suspended matters in the percolate by using the quartz sand layer, pumping the filtered percolate into the quartz sand production water tank, pumping the percolate in the quartz sand production water tank into a nanofiltration tank, uniformly spraying the percolate on a nanofiltration membrane through water distribution holes, wherein the aperture of the nanofiltration membrane is 1-2nm, the surface of the nanofiltration membrane is provided with negative charges, the permeation of excessive ions can be blocked by electrostatic interaction, macromolecular organic matters and suspended solids can be separated, and salts and ammonia nitrogen can be well removed, ensuring that COD, ammonia nitrogen, heavy metal ions and additional non-metal ions all meet the discharge requirement, pumping the percolate in the nanofiltration water production tank into a reverse osmosis tank to be filtered by a reverse osmosis membrane, wherein the reverse osmosis is a pressure-driven membrane treatment process, the operation pressure is 1.5-10.5Mpa, and the interception component is (1-10) × 10-10the solute with small molecular weight m can remove low molecular weight substances and inorganic ions in the aqueous solution, and can also remove all suspended matters, dissolved matters and colloids, thereby achieving the purposes of separation and purification.
The beneficial effect of this scheme does: 1. the graded filtering treatment system comprises a microfiltration filter, a quartz sand filter, a nanofiltration device and a reverse osmosis device, so that sludge, impurities and other harmful substances contained in the leachate are gradually removed from large to small, the low sludge and purification of the domestic garbage leachate are realized, and the domestic garbage leachate reaches the discharge standard. 2. Through the arrangement of the microcomputer controller, the electric water level meter, the water pump and the double-flow electromagnetic valve, automatic filtering work is realized, and the filtering pressure of each device in the graded filtering processing system is kept normal.
Furthermore, a security filter is arranged on the water inlet pipe B and comprises a shell made of stainless steel and a filter element made of PP cotton. The filter is used for filtering the micro quartz sand filtered by the quartz sand filter so as to ensure the water quality filtering precision and protect the nanofiltration membrane from being damaged by large granular substances.
Furthermore, a cleaning structure is arranged in the micro filter tank, and the cleaning mechanism comprises a motor, a brush plate, a brush fixed on the brush plate and a transmission mechanism driven by the motor and driving the filter cylinder to rotate; the outer wall of the filter cylinder is in contact with a brush, the brush plate is fixedly connected to the bottom of the micro filter, the brush is vertically arranged on the brush plate, and the arrangement length of the brush on the brush plate is not less than the height of the steel wire winding part of the filter cylinder. After the filter cartridge is used for a certain time, a large amount of sludge and impurities are accumulated at the filter cartridge, the normal use of the filter cartridge is seriously influenced, at the moment, the motor is started, the motor drives the transmission mechanism, the transmission mechanism drives the filter cartridge to rotate, and the brush removes the sludge and the impurities on the surface of the filter cartridge when the filter cartridge rotates due to the contact of the filter cartridge and the brush.
Further, the bottom of filtering the jar is equipped with outlet and intake pipe, the outlet is connected with drain pipe F, is equipped with the stop valve on the drain pipe F, and drain outlet department is equipped with the filter screen, the intake pipe intercommunication has the air pump. After using a period of time, the filth that the quartz sand layer was held back can form the filter membrane to can influence the filter effect on quartz sand layer, at this moment, close water pump and the double flow solenoid valve on the drain pipe B, open stop valve and air pump, the air gets into the filter tank from the intake pipe and produces the bubble and make the vibration of quartz sand layer, will attach to filth and quartz sand separation on the quartz sand, then discharge from drain pipe F, the filter effect on quartz sand layer has been kept like this.
Drawings
FIG. 1 is a flow chart of a graded filtration treatment system for landfill leachate according to the present invention;
FIG. 2 is a block diagram of a graded filtration treatment system for landfill leachate according to the present invention;
FIG. 3 is a schematic view of the microfiltration filter of FIG. 2;
FIG. 4 is a schematic structural view of the silica sand filter of FIG. 2;
Fig. 5 is a schematic structural view of the nanofiltration device of fig. 2.
Detailed Description
The following is further detailed by the specific embodiments:
Reference numerals in the drawings of the specification include: the device comprises a motor 1, a worm 2, a rotating shaft 3, a microfiltration tank 4, a filter cartridge 5, a drain pipe A6, a brush 7, a brush plate 8, a filter tank 9, a water distributor 10, a water diversion plate 11, an air pump 12, an air inlet pipe 13, a quartz sand layer 14, a water inlet pipe A15, a stop valve 16, a drain pipe F17, a drain pipe B18, a nanofiltration tank 19, a nanofiltration membrane 20, a water stop plate 21, a water distribution hole 22, a water inlet pipe B23, a drain pipe C24, a double-flow electromagnetic valve 25, a water pump 26, a microfiltration product water tank 27, a quartz sand product water tank 28, a security filter 29, a nanofiltration product water tank 30, a reverse osmosis tank 31, a water inlet pipe C32.
The embodiment is basically as shown in the attached figures 1 and 2: a graded filtration treatment system for landfill leachate comprises a microfiltration filter, a quartz sand filter, a nanofiltration device, a reverse osmosis device and a microcomputer controller, as shown in figure 3: the microfiltration filter comprises a microfiltration tank 4, the microfiltration filter and a microfiltration product water tank 27, the microfiltration filter comprises a filter cartridge 5 made of stainless steel wires and a drain pipe A6, one end of the drain pipe A6, which is far away from the filter cartridge 5, is positioned in the microfiltration product water tank 27, a cleaning structure is arranged in the microfiltration tank 4, the cleaning mechanism comprises a motor 1, a brush plate 8, a brush 7 fixed on the brush plate 8, and a transmission mechanism which is driven by the motor 1 and drives the filter cartridge 5 to rotate, the transmission mechanism comprises a rotating shaft 3 arranged at the bottom of the filter cartridge 5, the rotating shaft 3 is rotationally connected to the bottom of the microfiltration tank 4, a turbine is sleeved on the rotating shaft 3, the turbine is meshed with a worm 2, and one end of the worm; the outer wall of the filter cartridge 5 is contacted with a brush 7, a brush plate 8 is fixedly connected to the bottom of the micro filter tank 4, the brush 7 is vertically arranged on the brush plate 8, and the arrangement length of the brush 7 on the brush plate 8 is not less than the height of the steel wire wound part of the filter cartridge 5;
as shown in fig. 4: the quartz sand filter comprises a quartz sand production water tank 28, a filter tank 9 and a quartz sand layer 14 arranged in the filter tank 9, wherein the top end and the bottom end of the filter tank 9 are respectively provided with a water inlet pipe A15 and a water outlet pipe B18, one end of the water inlet pipe A15 is positioned in a micro-filtration production water tank 27, the other end of the water inlet pipe A15 is connected with a water distributor 10, a water distribution plate 11 is arranged below the water distributor 10, the free end of the water outlet pipe B18 is positioned in the quartz sand production water tank 28, the bottom of the filter tank 9 is provided with a water outlet and an air inlet pipe 13, the water outlet is connected with a water outlet pipe F17, a stop valve 16 is arranged;
as shown in fig. 5: the nanofiltration device comprises a nanofiltration tank 19 and a nanofiltration water production tank 30, a nanofiltration membrane 20 and a water-stop sheet 21 are arranged in the nanofiltration tank 19, the water-stop sheet 21 is positioned right above the nanofiltration membrane 20, a plurality of water distribution holes 22 which are uniformly arranged are formed in the water-stop sheet 21, a water inlet pipe B23 and a water outlet pipe C24 are respectively arranged at the upper end and the lower end of the nanofiltration tank 19, the free end of a water inlet pipe B23 is positioned in the quartz sand water production tank 28, a security filter 29 is arranged on the water inlet pipe B23, the security filter 29 comprises a shell made of stainless steel and a filter core made of PP cotton, and the free end of the water outlet pipe C539;
The reverse osmosis device comprises a reverse osmosis box 31 and a reverse osmosis membrane arranged in the reverse osmosis box 31, wherein a water inlet pipe C32, a water outlet pipe D33 and a water outlet pipe E34 are arranged on the reverse osmosis box 31, the free end of the water inlet pipe C32 is positioned in the nanofiltration water production tank 30, and the water outlet pipe D33 and the water outlet pipe E34 are positioned above and below the reverse osmosis membrane;
The treatment system of the scheme also comprises a concentrated solution tank, the tail ends of the drain pipe D33 and the drain pipe F17 are positioned in the concentrated solution tank, and percolate in the concentrated solution tank is refilled into the nitrification tank for nitrification again.
The micro-filtration product water tank 27, the filtration tank 9, the nano-filtration tank 19 and the reverse osmosis tank 31 are respectively provided with an electric water level meter, the water inlet pipe A15, the water inlet pipe B23, the water inlet pipe C24, the water outlet pipe A6, the water outlet pipe B18 and the water outlet pipe C32 are respectively provided with a water pump 26 and a double-flow electromagnetic valve 25, and the electric water level meter, the water pump 26 and the double-flow electromagnetic valve 25 are electrically connected with the microcomputer controller.
Discharging the nitrified mud-water mixture into a microfiltration tank 4, pumping percolate filtered by a filter cartridge 5 into a microfiltration product water tank 27 through a water pump 26, wherein the filter cartridge 5 is made of stainless steel wires and can intercept larger particulate matters, suspended matters and biological strains, pumping the percolate in the microfiltration product water tank 27 into a filter, uniformly sprinkling the percolate on a quartz sand layer 14 through a water distributor 10 and a water diversion plate 11, filtering the suspended matters in the percolate by utilizing the quartz sand layer 14, pumping the filtered percolate into a quartz sand product water tank 28, pumping the percolate in the quartz sand product water tank 28 into a nanofiltration tank 19, uniformly sprinkling the percolate on a nanofiltration membrane 20 through a water distribution hole 22, wherein the aperture of the nanofiltration membrane 20 is 1-2nm, the membrane surface of the nanofiltration membrane has negative charges, the permeation of more added ions can be blocked through electrostatic interaction, and macromolecular organic matters and suspended solids can be separated, the method has the advantages that salts and ammonia nitrogen are well removed, COD, ammonia nitrogen, heavy metal ions and extra non-metal ions are guaranteed to meet the discharge requirement, then leachate in the nanofiltration water production tank 30 is pumped into a reverse osmosis tank 31 to be filtered through a reverse osmosis membrane, the reverse osmosis is a pressure-driven membrane treatment process, the operation pressure is 1.5-10.5Mpa, the interception component is (1-10) × 10-10m small molecular solutes, low molecular weight substances and inorganic ions in an aqueous solution can be removed, all suspended matters, dissolved matters and colloids can be removed, and the purposes of separation and purification are achieved.
after the filter cylinder 5 is used for a certain period of time, a large amount of sludge and impurities are accumulated at the filter cylinder 5, so that the normal use of the filter cylinder 5 is seriously influenced, at the moment, the motor 1 is started, the motor 1 drives the worm 2 to rotate, the turbine drives the rotating shaft 3 to rotate, the rotating shaft 3 drives the filter cylinder 5 to rotate, and the brush 7 removes the sludge and the impurities on the surface of the filter cylinder 5 when the filter cylinder 5 is in contact with the brush 7 during grabbing and rotating.
When the quartz sand filter is used for a period of time, the dirt trapped by the quartz sand layer 14 forms a filter membrane, so that the filtering effect of the quartz sand layer 14 can be influenced, at this time, the quartz sand filter is backwashed, namely, the water pump 26 and the double-flow electromagnetic valve 25 on the water discharge pipe B18 are closed, the stop valve 16 and the air pump 12 are opened, air enters the filter tank 9 from the air inlet pipe 13 to generate air bubbles so as to vibrate the quartz sand layer 14, the dirt attached to the quartz sand is separated from the quartz sand, and then the air bubbles are discharged from the water discharge pipe F17, so that the filtering effect of the quartz sand layer 14 is maintained.
the foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (4)
1. The utility model provides a landfill leachate stage filtration processing system which characterized in that: the device comprises a microfiltration filter, a quartz sand filter, a nanofiltration device, a reverse osmosis device and a microcomputer controller, wherein the microfiltration filter comprises a microfiltration tank, a microfiltration filter and a microfiltration product water tank, the microfiltration filter consists of a filter cylinder made of stainless steel wires and a drain pipe A, and one end of the drain pipe A, which is far away from the filter cylinder, is positioned in the microfiltration product water tank;
The quartz sand filter comprises a quartz sand water production tank, a filter tank and a quartz sand layer arranged in the filter tank, wherein the top end and the bottom end of the filter tank are respectively provided with a water inlet pipe A and a water outlet pipe B, one end of the water inlet pipe A is positioned in the micro-filtration water production tank, the other end of the water inlet pipe A is connected with a water distributor, a water distribution plate is arranged below the water distributor, and the free end of the water outlet pipe B is positioned in the quartz sand water production tank;
The nanofiltration device comprises a nanofiltration tank and a nanofiltration water production tank, wherein a nanofiltration membrane and a water-stop sheet are arranged in the nanofiltration tank, the water-stop sheet is positioned right above the nanofiltration membrane, a plurality of uniformly arranged water distribution holes are formed in the water-stop sheet, the upper end and the lower end of the nanofiltration tank are respectively provided with a water inlet pipe B and a water outlet pipe C, the free end of the water inlet pipe B is positioned in the quartz sand water production tank, and the free end of the water outlet pipe C is positioned in the nanofiltration water production tank;
The reverse osmosis device comprises a reverse osmosis box and a reverse osmosis membrane arranged in the reverse osmosis box, the reverse osmosis box is provided with a water inlet pipe C, a water outlet pipe D and a water outlet pipe E, the free end of the water inlet pipe C is positioned in the nanofiltration water production tank, and the water outlet pipe D and the water outlet pipe E are positioned above and below the reverse osmosis membrane;
the micro-filtration water tank, the filter tank, the nano filter tank and the reverse osmosis tank are all provided with an electric measuring water level meter, the water inlet pipe A, B, C and the water outlet pipe A, B, C are all provided with a water pump and a double-flow electromagnetic valve, and the electric measuring water level meter, the water pump and the double-flow electromagnetic valve are all electrically connected with the microcomputer controller.
2. the graded filtration treatment system for landfill leachate according to claim 1, wherein: and a security filter is arranged on the water inlet pipe B and comprises a shell made of stainless steel and a filter element made of PP cotton.
3. The graded filtration treatment system for landfill leachate according to claim 2, wherein: a cleaning structure is arranged in the micro filter tank, and the cleaning mechanism comprises a motor, a brush plate, a brush fixed on the brush plate and a transmission mechanism driven by the motor and driving the filter cylinder to rotate; the outer wall of the filter cylinder is in contact with a brush, the brush plate is fixedly connected to the bottom of the micro filter, the brush is vertically arranged on the brush plate, and the arrangement length of the brush on the brush plate is not less than the height of the steel wire winding part of the filter cylinder.
4. The graded filtration treatment system for landfill leachate according to claim 3, wherein: the bottom of filtering the jar is equipped with outlet and intake pipe, the outlet is connected with drain pipe F, is equipped with the stop valve on the drain pipe F, and drain pipe department is equipped with the filter screen, the intake pipe intercommunication has the air pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910876707.1A CN110563176A (en) | 2019-09-17 | 2019-09-17 | landfill leachate stage filtration processing system |
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| CN201910876707.1A CN110563176A (en) | 2019-09-17 | 2019-09-17 | landfill leachate stage filtration processing system |
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| CN110563176A true CN110563176A (en) | 2019-12-13 |
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| CN111777228A (en) * | 2020-07-22 | 2020-10-16 | 钟乃聪 | Rural black smelly sewage, membrane processing system for landfill leachate |
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|---|---|---|---|---|
| CN111777228A (en) * | 2020-07-22 | 2020-10-16 | 钟乃聪 | Rural black smelly sewage, membrane processing system for landfill leachate |
| CN114225523A (en) * | 2021-12-10 | 2022-03-25 | 贵州欧瑞欣合环保股份有限公司 | Rural domestic sewage treatment equipment |
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