JP3204678U - Domestic sewage treatment equipment - Google Patents

Abstract

Disclosed is a sewage treatment apparatus that ensures the quality of sewage water. SOLUTION: A first stage biochemical treatment tank 12 and an up-flow type aerated biofiltration tank 16 are provided. A water outlet 10-1 is opened at a lower part of a main body of the first stage biochemical treatment tank 12, and the bottom and the inside of the filtration tank 16 are provided. The first aeration tube 13-1 and the second aeration tube 13-2 are respectively attached to the lower part of the tube. A filter medium layer is attached to the upper part of the filtration tank 16, a water collection tank 37 is provided around the main body at the upper part of the filter medium layer, and the upper outlet 10 -2 is opened, and the second aeration pipe 13-2 is attached so as to be supported by the shutoff net 27, and the water inlet 20-1 and the lower outlet 10-3 are provided in the main body of the filtration tank 16 at the lower part of the shutoff net 27. Can be opened. A water outlet 10-1 of the first-stage biochemical treatment tank 12 is in order through a first pipe, a first manual valve 11-1, a sewage pulverizing pump 14, a flow control valve 11-2, a flow meter 39, and an upflow aeration. Connected to the water inlet 20-1 of the biological filtration tank 16. [Selection] Figure 1

Description

  The present invention relates to a sewage treatment apparatus, and more particularly to a domestic sewage treatment apparatus.

  In the Chinese patent of Patent No. CN02117487.3, a “sewage treatment method and apparatus for living sewage” is disclosed, which mainly includes precipitation filtration and periodic biochemical reaction, an oxygen supply step is added, and anaerobic -The aerobic reaction is operated alternately in multiple stages, and as the process steps, domestic wastewater supply, coarse precipitation filtration, one-stage periodic biochemical reaction, first oxygen supply process, two-stage periodic biochemical reaction, second It is performed like oxygen supply process, precipitation, third oxygen supply, water sample collection, discharge. This method has high requirements for equipment maintenance in the biochemical treatment method using MBR membrane, and if the equipment breaks down, the maintenance work becomes very difficult due to the particularity of the surrounding environment, and the equipment failure rate is high. There is a defect that the workload is heavy.

  In the Chinese patent of Patent No. CN201110388847.6, a treatment method for composite ship sewage is disclosed, and as a step, a pulverization step of pulverizing relatively large solid particles in the sewage collected in a collection tank using a pulverization pump A seawater introduction step for mixing seawater and sewage at a predetermined ratio, an electrocoagulation step for introducing mixed sewage of the mixed seawater and sewage into an electrocoagulation apparatus to perform electrocoagulation treatment, and an electrolyzer for treating sewage with a pump Electrolysis step of electrolyzing and oxidizing the sewage in the electrolytic tank and generating sodium hypochlorite to kill E. coli, and further oxidizing and sterilizing the electrolyzed sewage in the oxidation collection tank Further oxidation step to discharge the generated hydrogen gas, and introduce sewage into the neutralization unit to neutralize residual chlorine and bring it to the standard It includes a neutralization step of discharging the sewage treated to pass outside Funefunabata by drainage pump after they steps are sequentially performed. This method requires a large amount of work because it is necessary to clean the electrocoagulation apparatus well, and the sludge in water cannot be treated sufficiently, and there is too much residual chlorine after electrolysis, so it is necessary to neutralize by adding a chemical. Therefore, the disadvantage that it causes secondary contamination and it is difficult to lower the COD index survives.

  The present invention overcomes the deficiencies in the prior art, occupies less space, reduces the maintenance workload of the equipment, lowers maintenance costs, and does not cause secondary pollution due to the non-sludge treatment of the equipment. An object is to provide an apparatus.

  The illustrated domestic wastewater treatment apparatus of the present invention includes a first-stage biochemical treatment tank and an upflow aeration biofiltration tank, and is disposed at the top of the main body of the first-stage biochemical treatment tank and the upflow aeration biofiltration tank. Each exhaust port is opened, and a seventh manual valve is connected via an exhaust pipe at the top of the main body at the exhaust port of the upflow aeration biofiltration tank, and the main wastewater source is connected to the main body of the one-stage biochemical treatment tank. An entrance is opened, a water outlet is opened at the lower part of the main body of the first-stage biochemical treatment tank, a liquid level gauge of the first-stage biochemical treatment tank is installed in the first-stage biochemical treatment tank, and the first-stage biochemical treatment tank is installed. A first aeration pipe and a second aeration pipe are respectively attached to the bottom of the treatment tank and the lower part of the upflow aeration biological filtration tank, and the first aeration pipe and the second aeration pipe are connected to an aeration fan, and Flow A filter medium layer is attached to the upper part of the aeration biofiltration tank, a water collection tank is installed around the main body at the upper part of the filter medium layer of the upflow aeration biofiltration tank, and an upflow aeration at a position corresponding to the water collection tank. An upper outlet is opened in the main body side wall of the biofiltration tank, the second aeration pipe is attached to be supported by a shutoff net, and the shutoff net is fixed to the main wall of the upflow aeration biofiltration tank, The upflow aeration biofiltration tank between the barrier mesh and the filter medium layer is filled with floating spherical biopacking to form a biochemical treatment area, and the biochemical treatment area of the upflow aeration biofiltration tank A heating device is attached to the main body of the upflow aeration biofiltration tank at the lower part of the shut-off net, and the main body of the upflow aeration biofiltration tank is lower than the intake of the upflow aeration biofiltration tank. Bottom out A mouth is opened, and the outlet of the one-stage biochemical treatment tank is a first manual valve, a sewage crushing pump, a flow control valve, a flow meter, and a water intake of an up-flow type aeration biofiltration tank through a first conduit in order. The level gauge of the first stage biochemical processing tank is connected to the control system, and the control system collects the level signal of the level gauge of the first stage biochemical processing tank, and in the tank based on the level signal. Is determined, and a start / stop control signal is output to the sewage grinding pump.

  The present invention provides additional pretreatment for sewage by adding an aeration device to the first-stage biochemical treatment tank, and further controls the airway to enable continuous aeration mode and intermittent aeration mode as needed. Have the advantage and beneficial effect of being able to switch. Intermittent aeration can be applied where there is a requirement for phosphorus content in the treated sewage, with alternating aerobic and anaerobic organisms, partially degrading ammonia nitrogen and phosphorus Can do. Circulating and pulverizing a large volume in the one-stage biochemical processing tank using a pulverizing pump makes it suitable for biochemical processing and improves the biochemical processing effect of the system. The two-stage treatment apparatus is an up-flow type aerated biofiltration tank, and is a treatment apparatus having a function of combining precipitation, biochemical treatment, and filtration. Water is absorbed by the upstream crushing pump, and is supplied after the water absorption flow rate is adjusted by the flow control valve. Therefore, in the process of processing in the upflow aeration biofiltration tank, the water absorption is uniform, the water flow is stable, and when the water quality and treatment time are the same, the fluctuation of the water quality is low, thereby ensuring the water quality stability of the sewage. A constant temperature heating device is further installed in the tank, and the sewage is heated at a low temperature in a low temperature environment to provide optimum growth and working temperature environment for the bacteria group, thereby ensuring the treatment effect of the device. By circulating the precipitates at the bottom of the returning tank and impurities by cleaning the filter media, the system is made mudless and the maintenance work load is low. In the three-stage electrolytic treatment, the quality of water discharged by sterilization and oxidative decolorization of sewage is achieved to the first class A class standard, and it is not necessary to add chemical agents. As described above, the system can operate stably, has low maintenance, low operation costs, no secondary contamination, and high water quality standards for discharge.

It is a structure schematic diagram of the domestic wastewater treatment apparatus of this invention.

  In order to further understand the contents, features, and effects of the present invention, the following examples will be described in detail in combination with the drawings.

  The illustrated domestic sewage treatment apparatus of the present invention includes a first-stage biochemical treatment tank 12 and an upflow aeration biofiltration tank 16, and the main body of the first-stage biochemical treatment tank 12 and the upflow aeration biofiltration tank 16. And a seventh manual valve 11-7 is connected to the exhaust port 8 of the upflow aeration biofiltration tank 16 via an exhaust pipe at the top of the tank, so that the one-stage biochemical An entrance 5 of a domestic sewage source is opened in the main body of the treatment tank 12, a water outlet 10-1 is opened in the lower part of the main body of the first-stage biochemical treatment tank 12, and a first-stage organism is placed in the first-stage biochemical treatment tank 12. A liquid level meter 7-1 for the chemical treatment tank is installed, and a first aeration pipe 13-1 and a second aeration are provided at the bottom of the one-stage biochemical treatment tank 12 and the lower part of the upflow aeration biofiltration tank 16. Tube 13-2 The first aeration pipe 13-1 and the second aeration pipe 13-2 are connected to an aeration fan, and a filter medium layer is attached to the upper part of the upflow aeration biofiltration tank 16, and the preferred filter medium layer is The filter plate 23 is included, an umbrella-type filter head 24 is attached to the filter plate, and the upper part of the filter head is filled with a filter medium. A water collection tank 37 is provided around the main body in the upper part of the filter medium layer of the upflow aeration biofiltration tank 16, and an upper outlet is provided on the side wall of the upflow aeration biofiltration tank 16 at a position corresponding to the water collection tank 37. 10-2 is opened, and the second aeration pipe 13 is attached so as to be supported by a blocking net 27. The blocking net 27 is fixed to the inner wall of the main body of the upflow type aeration biofiltration tank 16, and The upflow aeration biofiltration tank 16 between the filter medium layers is filled with a floating spherical bio-packing 25 to form a biochemical treatment region 26, and the biochemical treatment of the upflow aeration biofiltration tank 16 is performed. A heating device 36 is attached to the region 26. When the temperature of the external environment is low, the heating device 36 heats the biochemical treatment region at a constant temperature to create an optimum growth and working temperature environment for microorganisms in the treatment region. By securing the treatment effect of wastewater. A water intake 20-1 is opened in the main body of the upflow aeration biofiltration tank 16 at the lower part of the blocking net 27, and the upflow aeration biofiltration tank 16 is lower than the water intake 20-1 of the upflow aeration biofiltration tank 16. A lower water outlet 10-3 is opened in the main body of the first stage, and the water outlet 10-1 of the first-stage biochemical treatment tank 12 is sequentially passed through the first pipe through the first manual valve 11-1, the sewage crushing pump 14, and the flow rate. The control valve 11-2, the flow meter 39, and the water inlet 20-1 of the upflow aeration biofiltration tank 16 are connected, and the liquid level meter 7-1 of the one-stage biochemical treatment tank is connected to the control system, and the control The system collects the liquid level signal of the level gauge of the first-stage biochemical treatment tank, determines the liquid level height in the tank based on the liquid level signal, outputs the start / stop control signal to the sewage crushing pump 14, and When the position becomes higher than the predetermined value, the control system Outputs a start signal to the sewage grinding pump 14, or the liquid level is lower than the predetermined value, the control system outputs a stop signal to the sewage grinding pump 14.

  The operation process of this device is as follows.

  The chitin-derived sewage 1 is separated from the chitin-derived sewage 1 by the grease trap 4 as a part of the domestic sewage source, and the bath sewage 2 and the black water 3 are collectively fed into the one-stage biochemical treatment tank 12.

  By adding solid or liquid artificial microorganisms in the first-stage biochemical treatment tank 12 and rapidly breeding a large amount of microorganisms, the start-up time of the sewage treatment apparatus is greatly shortened, and the aeration fan 15 intermittently or continuously air To provide oxygen gas necessary for the growth and reproduction of microorganisms, and to decompose sewage with microorganisms. The sewage crushing pump 14 is controlled by the liquid level gauge 7-1 in the first-stage biochemical treatment tank. When the water level is high, the sewage crushing pump 14 is activated, and the sewage in the tank is crushed and then the upflow aeration biofiltration Suck up into the tank 16. Since the water absorption is performed after adjusting and controlling the water absorption flow rate with the flow control valve, the water absorption is uniform in the process of treatment with the upflow aeration biological filtration tank, the water flow is stable, and the water quality changes when the water quality and treatment time are the same. Low, thereby ensuring sewage water quality stability.

  The ascending aeration biofiltration tank 16 is a sewage treatment apparatus that combines sedimentation, biochemical treatment, and filtration. The sewage treated in the first-stage biochemical treatment tank 12 is treated by the sewage crushing pump 14 with the upflow aeration biofiltration. Suction up to the water inlet 20-1 of the tank 16. The sewage flows from the bottom to the top through the blocking network 27 and then uniformly flows into the biochemical treatment area 26.

  The main body biochemical treatment area 26 is filled with the floating spherical bio-packing 25. The aeration fan 15 introduces oxygen gas into the biochemical treatment area to culture aerobic bacteria, and a large number of colonies are floating spherical. It adheres to the bio-packing 25 and biologically nitrifies impurities in the sewage.

  The sewage that has been subjected to biochemical treatment is sucked up to the filter plate 23 provided with the umbrella-shaped filtration head 24 in the filtration region 22 that is located in the upper part of the main body and filled with a filter medium having a constant thickness around the body, and impurities in the treated sewage Is filtered off to wash out the water.

  In the present apparatus, an aeration apparatus is added to the first-stage biochemical treatment tank 12, and when the discharged water in the first-stage biochemical treatment tank 12 is sent to the lower part of the ascending-type aeration biofiltration tank 16, the blocking network is used. The biochemical treatment is performed so that it flows from bottom to top. In this way, additional aeration equipment is installed in the first-stage biochemical treatment tank to perform further preliminary treatment on the sewage, thereby shortening the treatment time of the second-stage biochemical treatment tank and continuous aeration mode. And intermittent aeration mode can be selected as needed, and intermittent aeration can decompose ammonia nitrogen and phosphorus. When the sewage in the first-stage biochemical treatment tank is pulverized by the sewage pulverization pump and then enters the upflow aeration biofiltration tank, the large volume in the sewage may not be sufficiently pulverized. In the sewage, the material not sufficiently pulverized is filtered and blocked in the sedimentation area, thereby reducing the content of solid particles in the treated sewage, and clogging in the filtration head 24 and the filtration area 22 is prevented. Decrease. By adding a heater 36 in the upflow aeration biofiltration tank 16, it is possible to ensure that the internal temperature is kept at the optimum growth and working temperature of the bacterial group throughout, and the sewage treatment effect is ensured.

  Preferably, a water return port 9 is opened in the main body of the one-stage biochemical treatment tank 12, and a lower water discharge port 10-3 of the ascending aeration biofiltration tank 16 is passed through a first water return line in turn. One end of the second line is connected to the outlet of the sewage pulverization pump 14 and the flow rate control valve. The other end communicates with the fourth manual valve 11-4 and the water return port 9 of the one-stage biochemical treatment tank 12 in order. The upper outlet 10-2 of the upflow aeration biofiltration tank 16 communicates with the water return 9 of the first-stage biochemical treatment tank 12 through a second water return line provided with a sixth manual valve 11-6. To do. When the sewage in the first-stage biochemical treatment tank is crushed by the crushing pump and then enters the upflow aeration biofiltration tank, the large volume in it may not be crushed sufficiently. Filtration of the unmilled material in the sewage, then return to the one-stage biochemical treatment tank for circulation grinding and biochemical treatment.

  Preferably, the aeration fan 15 is provided as one unit and communicates with the gas storage tank 38 via a fan conduit, and the aeration fan 15 is a main body of the one-stage biochemical treatment tank 12 and the upflow type aeration biofiltration tank 16. The air supply ports 18-1 and 18-2 of the first aeration pipe 13-1 and the second aeration pipe 13-2 are installed outside, and the first flow control valve 19-1 and the third flow control valve 19-3, respectively. Are simultaneously connected to the gas storage tank through the aeration line installed. The aeration fan 15 is installed outside the main body in order to make the inspection and maintenance of the fan convenient. It is also possible to install underwater fans in the main body of the first-stage biochemical treatment tank 12 and the upflow aeration biofiltration tank 16 and connect the underwater fans to the first aeration pipe 13-1 and the second aeration pipe 13-2. Is possible.

  The packing in the filtration head and filtration area may become clogged over time and can be cleaned by a cleaning process. A cleaning pipe 21 having a hole in the filter plate is preferably installed, and the gas supply port 18-3 of the cleaning pipe 21 is connected to the gas storage through a cleaning connecting pipe provided with a second flow rate control valve 19-2. Connected to the tank. The process of cleaning the filter packing is to close the fifth manual valve 11-5, the two flow control valves 19-1, 19-3, open the flow control valve 19-2, compress the air, and filter through the cleaning pipe 21. Purge packing. Next, the fan is closed, the sixth manual valve 11-6 connected to the upper water outlet 10-2 is opened, the fourth manual valve of the grinding pump, the seventh manual valve 11-7 are closed, and the grinding pump is started. Sludge taken from the filter packing is returned to the one-stage biochemical treatment tank for further treatment.

  Preferably, a slope is installed at the bottom of the main body of the upflow aeration biofiltration tank 16 so as to incline to the lower outlet 10-3 of the upflow aeration biofiltration tank 16. Since impurities of large volume particles settle at the bottom of the upflow aeration biofiltration tank, they are collected in the vicinity of the lower water outlet 10-3 by making the bottom of the tank into a slope. Periodically open the third manual valve 11-3 and the fourth manual valve 11-4 to reverse the sludge grinding pump process, thereby sucking the sediment at the bottom of the upflow tank back into the one-stage biochemical treatment tank Next, the circulation process is performed.

  Preferably, in order to further improve the sewage treatment effect, the upper effluent port 10-2 of the upflow type aerated biological filtration tank 16 is connected to the collection pond 28 via the first sewage pipe line in which the fifth manual valve 11-5 is installed. The water level gauge 7-2 of the collection pond is installed in the collection pond, and the lower water outlet 10-4 of the collection pond is sequentially connected to the pump 29 via the second sewage pipe. The seawater or salt water 33 communicates with the stop valve 17-2 and the inlet of the sewage electrolysis electrode 31 in the electrolyzer 30, and the seawater pipe in which seawater or salt water 33 has installed the eighth manual valve 11-8 and the fourth flow control valve 19-4. To the inlet of the sewage electrolysis electrode. The water outlet 10-5 of the sewage electrolysis electrode 31 communicates with the lower water inlet 21-3 of the discharge tank 34, the water outlet 10-6 is opened at the upper part of the discharge tank 34, and the outlet is formed at the lower part of the discharge tank 34. 35 is opened, the exhaust ports 8 are opened in the collection pond and the main body of the discharge tank, the collection pond level meter 7-2 is connected to the control system, and the control system is connected to the collection pond level meter 7-2. The liquid level signal is collected, the liquid level height in the collection pond is determined based on the liquid level signal, and the start / stop control signal is output to the pump. When the liquid level becomes higher than the predetermined value, the control system outputs a start signal to the pump 29, or when the liquid level becomes lower than the predetermined value, the control system outputs a stop signal to the pump 29.

  In the figure, 32 is an electrolysis panel that provides power to the sewage electrolysis electrode 31.

  The water in the collection pond is sent to the sewage electrolysis electrode 31 in the electrolysis apparatus 30, and at the same time, seawater or salt water is added from the inlet of the electrode to improve conductivity, and electrolysis is performed. Bacteria in the water can be killed by electrolysis, and the COD index can be further reduced by decolorizing the sewage, and the electrolyzed water reaches the first class A class emission index. The electrolytic method further treats the biochemically treated wastewater to improve the treatment effect of the wastewater, and lowers the discharge index of the wastewater than when only the biochemical treatment method is used. As for the electrolyzer referred to here, sodium hypochlorite chemicals are produced in the electrolytic cell using sodium chloride contained in seawater as an operating principle, thereby disinfecting, oxidizing, and sterilizing waste water. , Make the discharged sewage meet the discharge standard.

  As a general exhaust treatment means, the exhaust port 8 in the main body of the one-stage biochemical treatment tank 12, the up-flow type aerated biofiltration tank 16, the collection pond and the discharge tank communicates with the exhaust pipe, and the exhaust is the exhaust port 8. Are collected in the exhaust pipe line and discharged together.

  As general means for preventing excessive liquid in the body, an overflow port 6 is opened in the main body of the one-stage biochemical treatment tank 12, and an overflow port is opened in the main body of the collection pond.

Claims (7)

  A first-stage biochemical treatment tank and an upflow aeration biofiltration tank, each having an exhaust opening at the top of the main body of the first-stage biochemical treatment tank and the upflow aeration biofiltration tank; The main sewage water source is opened at the main body, a water outlet is opened at the lower part of the main body of the first stage biochemical treatment tank, and the liquid level gauge of the first stage biochemical treatment tank is placed in the first stage biochemical treatment tank. A living sewage treatment apparatus to be installed, wherein a seventh manual valve is connected to an exhaust port of the upflow aeration biofiltration tank via an exhaust pipe at the top of the tank, and a bottom part in the one-stage biochemical treatment tank And a first aeration pipe and a second aeration pipe are respectively attached to the lower part of the upflow aeration biofiltration tank, the first aeration pipe and the second aeration pipe are connected to an aeration fan, and the upflow aeration biofiltration Tan A filter medium layer is attached to the upper part of the inside, and a water collection tank is provided around the main body at the upper part of the filter medium layer of the upflow aeration biofiltration tank, and the upflow type aeration biofiltration tank is located at a position corresponding to the water collection tank. An upper outlet is opened on the side wall of the main body, and the second aeration pipe is attached to be supported by a shut-off net, and the shut-off net is fixed to an inner wall of the main body of the upflow aeration biofiltration tank, and the shut-off net and the filter medium The upflow aeration biofiltration tank between the layers is filled with floating spherical biopacking to form a biochemical treatment area, and a heating device is installed in the biochemical treatment area of the upflow aeration biofiltration tank. It is attached, a water inlet is opened in the main body of the upflow aeration biofiltration tank at the bottom of the shut-off net, and a lower outlet is installed in the main body of the upflow aeration biofiltration tank lower than the water intake of the upflow aeration biofiltration tank. Opened and before The outlet of the first-stage biochemical treatment tank is connected to the first manual valve, the sewage crushing pump, the flow control valve, the flow meter, and the water intake of the up-flow aeration biofiltration tank through the first pipe in order. A chemical processing tank level gauge is connected to the control system, which collects the level signal of the one-stage biochemical processing tank level gauge, and based on the level signal, adjusts the level in the tank. A living sewage treatment apparatus characterized by judging and outputting a start / stop control signal to a sewage pulverization pump.   A water return port is opened in the main body of the one-stage biochemical treatment tank, and a lower water discharge port of the upflow aeration biofiltration tank is in turn connected to a third manual valve and an inlet of a sewage pulverization pump via a first water return line. One end of the second pipe is in communication with the first pipe between the outlet of the sewage crushing pump and the flow control valve, and the other is in turn in the fourth. A manual valve communicates with the water return port of the first-stage biochemical treatment tank, and the upper outlet port of the upflow aeration biofiltration tank passes through the second water return line where the sixth manual valve is installed. The domestic sewage treatment apparatus according to claim 1, wherein the domestic sewage treatment apparatus communicates with a water return port of a general treatment tank.   The aeration fan is connected to a gas storage tank via a fan conduit, and the aeration fan is installed outside the main body of the first-stage biochemical treatment tank and the upflow aeration biofiltration tank, and the first aeration pipe The air supply ports of the second aeration pipe and the second aeration pipe are connected to the gas storage tank at the same time through an aeration pipe provided with a first flow rate control valve and a third flow rate control valve, respectively. The domestic sewage treatment apparatus as described.   The domestic sewage treatment apparatus according to claim 3, wherein the filter medium layer includes a filter plate, an umbrella-shaped filter head is attached to the filter plate, and the filter medium is filled in an upper portion of the filter head.   A cleaning pipe having a hole formed in the filter plate is installed, and an air supply port of the cleaning pipe is connected to the gas storage tank through a cleaning connection pipe provided with a second flow rate control valve. The domestic sewage treatment apparatus according to claim 4.   6. The domestic sewage treatment according to claim 5, wherein a slope is installed at the bottom of the main body of the upflow aeration biofiltration tank so as to incline toward the lower outlet of the upflow aeration biofiltration tank. apparatus.   The upper outlet of the upflow aeration biological filtration tank communicates with the upper inlet of the collection pond through the first sewage pipe having the fifth manual valve, and the collection pond level gauge is attached to the collection pond. The lower outlet of the collection pond communicates with the pump, the check valve and the inlet of the sewage electrolysis electrode in the electrolyzer in order through the second sewage pipe, and sea water or salt water is the eighth manual valve and the fourth flow control valve. The discharge port of the sewage electrolysis electrode communicates with the lower water intake port of the discharge tank through the seawater pipe line where the discharge port is opened, and the discharge port is opened at the upper part of the discharge tank. A drain outlet is opened at the bottom of the tank, an exhaust opening is opened in each of the collection pond and the main body of the discharge tank, the collection pond level gauge is connected to the control system, and the control system is connected to the level of the collection pond level gauge. Collect the signal and determine the liquid level height in the collection pond based on the liquid level signal. And living sewage treatment apparatus according to claim 6, characterized in that outputs a stop start control signal to the pump.