149 results about "Sewage disposal plants" patented technology

The invention discloses a sewage treatment engineering monitoring system based on a wireless sensor network. The sewage treatment engineering monitoring system comprises a plurality of wireless monitoring substations, a wireless transmission system and a wireless monitoring master station, wherein the wireless monitoring substations are used for collecting relative information of field apparatuses of the sewage treatment engineering; the data and commands required to be transferred by the monitoring system are communicated through the wireless transmission system; the wireless monitoring master station comprises a monitoring software, a server, a client and an Ethernet switch; and the client and the server exchange data through the Ethernet switch, and the server is mainly used for storing and managing the data of the whole sewage disposal plant. Compared with a traditional PLC (Programmable Logic Controller) control system, the system has stronger data processing capacity and larger system storage volume; and each data collecting module has an independent controller, so that the system has a strong reliability. Compared with the traditional wired transmission systems, the wireless transmission system is utilized, so that the system has the advantages of low cost and convenience for mounting and debugging, etc.

The invention discloses a method for treating acidic waste water containing heavy metal and reclaiming the heavy metal through a biomass fixed bed, which is characterized in that dry solid biomass capable of being decomposed by microbes is granulated and filled into a container with a supporting layer and a water distributing device so as to form a fixed bed microbe reactor; sewage disposal plant sludge containing sulfate reducing bacteria is taken as the source of microbe bacteria on the fixed bed, and the microbes are cultured, proliferated and acclimated to adapt to the environment of the biomass filler fixed bed through the backflow circulation of the outputted water or taking ferrous sulfate aqueous solution as the inputted water; acid effluent containing heavy metallic ions is led into the fixed bed for direct filtration; and when the water filtering speed can not meet the preset requirements, the operation is stopped, substances in the fixed bed are taken out, the heavy metal is reclaimed through smelting, and the fixed bed microbe reactor is refilled. The method is suitable for waste water containing Cr2O7 <2->, AsO3 <2->, Cu <2+>, Hg <2+> Ag <+>, Cd <2+> and the like. The method can be used for reclaiming the valuable metal resources with low waste water treatment cost.

A gutter inlet automatic overflow pollutant intercepting device comprises a clamping seat. At least one extensible rod is connected with the portion below the clamping seat. The lower end of the extensible rod is connected with a metal support. The metal support and the extensible rod are sleeved by a filter screen. The gutter inlet automatic overflow pollutant intercepting device is characterized in that the clamping seat comprises a grease absorbing cable clamping groove. According to the gutter inlet automatic overflow pollutant intercepting device, pollutants entering a gutter inlet is intercepted through the pollutant intercepting filter screen, so that the gutter inlet and a rainwater pipeline are prevented from being blocked, and the water discharging capacity of a rainwater pipeline network is improved; the pollutants are controlled from a source through the rainwater pipeline network, so that disposing pressure of a sewage disposal plant and pollution to city water by runoff pollution are reduced. Grease type pollutants in runoff rainwater can be effectively controlled through the arrangement of a grease absorbing cable, so that the following disposing cost of the sewage disposal plant and the pollution of city water are reduced, and the gutter inlet automatic overflow pollutant intercepting device has obvious environment and economic benefits. According to the gutter inlet automatic overflow pollutant intercepting device, the structure of an existing gutter inlet is not changed, the improving cost of the gutter inlet is reduced, and the gutter inlet automatic overflow pollutant intercepting device is simple in structure, practical and low in production cost.

The invention discloses a preparation method of a modified and molded Mg-Al hydrotalcite and the application thereof. When in preparation, a mixed saline solution and a mixed aqueous alkali, containing Mg<2+> and Al<3+>, are respectively prepared and then mixed. Aging and crystallization are carried out after complete reaction, and the Mg-Al hydrotalcite is obtained after filtration, washing and drying; the Mg-Al hydrotalcite and a bonding agent are added into a magnesium saline solution and the pH value of the obtained paste is adjusted. After reaction, centrifugal separation, drying and extrusion molding are carried out, and then the paste is dried, roasted and cooled to the room temperature. When in adsorption and ion exchange, the product of the invention does not block a bed body and is easy for separation after reaction, suitable for the treatment of phosphorus and nitrogen anions in aqueous solution, water of a sewage disposal plant, seawater and breeding wastewater. A good treatment effect is available and an effluent standard can be met. Furthermore, after use, the product has better absorption effects after desorption and regeneration, thereby being beneficial to the realization of industrialized application.

The invention disclose a sludge phase-splitting slaking method of waste water disposing plant involving to a sludge disposing and resource utilization technology, which comprises the following steps: proceeding aerate hydrolytic slaking reaction 6d with dissolved oxygen at 1.5-2 mg/L, pH value at 5.5-6.0 and temperature at 30-35 deg.c; getting hydrolytic slaking product; entering into centrifugal machine; proceeding solid-liquid separation; getting hydrolysate and mud cake; entering hydrolysate into filling-type methanation reacting bed with temperature at 32-38 deg.c and cycling speed at 0.005-0.02m/s; proceeding methanation slaking with waterpower residence time at 3d; getting marsh gas and slaking yielding water; leading marsh gas to gas-fired boiler; producing vapor; refluxing slaking yielding water to distribution well of sewage disposal plant; mixing mud cake with dry sludge till moisture percentage at 50-60%; heating and drying with vapor producing by boiler in dehumidifier; getting dry sludge with moisture percentage at 32-38%; using to land.

The invention discloses an integrative method to use residue heat of garbage power plant to dry sludge and generate electricity by sludge, which comprises: 1) removing dust to the discharged smoke gas and drying sludge with two-stage; 2) pretreating the sludge from urban sewage disposal plant, or dredged sludge; 3) processing the pretreated sludge into column shape by machine for first drying stage; 4) cutting the said sludge out of kiln into particle; 5) taking second drying stage to sludge particle of size less than 6-10mm; 6) conveying the sludge to garbage electricity generating system to mix with garbage and coal and burn for electricity. This method has well social, environmental and economic benefits.

The invention provides a treating method for organic rubbish and a special device thereof. Materials are fully preheated in virtue of over-heated tail gas of a steam boiler or waste gas of a hydrolysis-hydrothermal oxidation reactor; organic materials enter the hydrolysis-hydrothermal oxidation reactor for processing through a feeding machine; the organic materials are processed into deodorizer, liquid fertilizer and organic fertilizer. The treating method of the invention has the advantages of quick treatment speed, thorough sterilization, good quality of the produced fertilizer, no secondary pollution, low operation fee and wide applicable range, and can be broadly applied in the treatment of rubbish such as organic materials in domestic garbage, sewage sludge of sewage plants, agricultural wastes, dead bodies of poultry and live stock, medical wastes and remains of food factories and abattoirs, etc.

The invention relates to a system and a method for removing phosphorus by three-mud process nitrification and denitrification. The system comprises a pretreating unit, an anaerobic unit, a middle precipitation unit, a primary aeration biological nitrification unit, an anoxic unit, a secondary precipitation unit and a secondary aeration biological nitrification unit. The method comprises the following steps that: after being precipitated in the pretreating unit for removing oil, the primary water enters an anaerobic pool with returned sludge to anaerobicly release the phosphorus; microorganisms absorb polyhydroxyrate (PHB) in a dissoluble organic compound body in the water; after muddy water is precipitated in a middle precipitation pool, a supernatant enters the primary aeration biological nitrification unit and an effluent and sludge in the middle precipitation pool enter an anaerobic pool to undergo denitrification and dephosphorization; and after mixed solution in the anaerobic pool is separated in a secondary precipitation pool, the supernatant enters the secondary aeration biological nitrification unit for further treatment, wherein one part of the sludge is reclaimed and theother parts of the sludge are discharged as remaining sludge. The system of the invention is small in occupied area and low in basic construction and operation costs. For low-carbon and nitrogen urban sewage, the effluent of the system can stably meet the first grade A standards of Urban Sewage Disposal Plant Contamination Integrated Discharge Standard.

The invention discloses a magnetic co-sedimentation biological filtering tank process. Yielding water of a sand sedimentation tank of a sewage processing plant firstly enters a mixing tank, and a coagulate is added into the mixing tank; then the yielding water flows into a flocculation tank, and magnetic loading materials and a coagulant aid are added into the flocculation tank; the yielding water flows to a sedimentation tank at last, and is sedimentated to separate sludge and water; and the yielding water of the sedimentation tank is introduced to a biological filtering tank for further processing, a part of sedimentated sludge is hoisted to the flocculation tank through a refluence sludge pump so as to enhance flocculation effect, a part of sedimentated sludge is hoisted to a magnetic separation tank through a remnant sludge pump, the magnetic loading materials are separated from the sludge from the magnetic separation tank by a magnetic drum, the magnetic loading materials return to the flocculation tank for cyclic utilization, and the sludge is discharged to a sludge processing system of the sewage processing plant. The invention can improve the pretreatment process of the biological filtering tank, enhance the shock load capacity of the processing system, ensure the operational stability of the biological filtering tank, enhance the processing effect, reduce the floor area as far as possible at the same time, save land resources, and the like.

The present invention discloses one kind of chlorine collecting agent and its preparation process. The chlorine collecting agent is prepared with calcium hydroxide, surfactant, filming drier, diluent and sodium silicate. It has high chlorine eliminating efficiency, waterproof and moistureproof property, no caking, high air permeability and other advantages. It is used in absorbing and eliminating chlorine in various kinds of production fields, such as chloralkali plant, papermaking mill, textile mill, sewage treating yard, etc.

The invention discloses a device and a method for realizing sludge digestion fluid short-cut nitrification of continuous flow suspending media. The device is provided with a raw water tank, a denitrification filtering column, a suspending media reactor, a secondary basin and a water outlet tank, wherein the raw water tank is an open casing, the denitrification filtering column is a cylindrical tube, cubic suspending sponge filling materials are filled in the denitrification filtering column, the suspending media reactor is an open basin body with inner cavity divided into a plurality of grid chambers, cubic suspending sponge filling materials are filled in the grid chambers, further the suspending media reactor is equipped with a gas pump, a gas flow meter and an aerated conduit, the secondary basin is a column, and the water outlet tank is a open casing. The method for realizing sludge digestion fluid short-cut nitrification comprises starting the system and adjusting operation in running. The device and the method can save a large amount of denitrification carbon sources, increase denitrogenation efficiency of sewage disposal plants, and achieve the purpose of saving energy and lowering energy consumption.

Disclosed is an on-site treatment method of food waste generated from multi-unit dwellings and institutional food service facilities, by transporting wastewater-containing food waste to a separation chamber by use of domestic wastewater or an additional transporter; separating the transported food waste to wastewater and food waste; and treating the separated wastewater in a sewage disposal plant, and the separated food waste using disposal equipment. Such food waste can be treated even using disposal equipment of small capacities, due to separation of wastewater and food waste, compared to disposal equipment of large capacities required for treating wastewater and food waste together. Also, the quality of the separated wastewater is better than the conventional quality of wastewater, and thus loads of the sewage disposal plant can be efficiently decreased.

The invention provides a method for soft measurement of the effluent total phosphorus (TP) in the sewage disposal process based on the neural network, and belongs to the field of sewage disposal field. The mechanism is complex in the sewage disposal process, and to enable a sewage disposal system to be in a good running working condition and to obtain the higher effluent quality, the procedure parameters and the water quality parameters in the sewage disposal system need to be detected. The invention provides a soft measurement model established based on the self-organization radial-based neural network to solve the problem that the effluent total phosphorus of a current sewage disposal plant cannot be obtained in real time. The initial structure and the initial parameters of the neural network are determined according to the self-organization method, the structure of the neural network is simplified, and real-time soft measurement is carried out on the effluent TP. According to the soft measurement result, the related control link in the sewage disposal process and materials in the biochemical reaction are adjusted, the quality of the effluent obtained after sewage disposal is improved, and a theoretical support and a technological guarantee are provided for safe and stable running in the sewage disposal process.

The invention discloses a method for culturing granulated sludge in an anaerobic/ anoxic-aerobic sequencing-batch reactor, which is characterized in that: 1) inoculated sludge of the reactor is sludge of urban sewage disposal plants by adopting a biological denitrogenation technology; and 2) wastewater containing organic substances and ammonia nitrogen enters the reactor in 2 to 5 steps, the reactor is subjected to the anaerobic/ anoxic stage and the aerobic stage in turn according to the time sequence after water inlet, and sludge precipitation and one-step drainage are performed after the final step of water inlet and the subsequent anaerobic and anoxic stage as well as the subsequent aerobic stage are over. The method adopts the multi-step water inlet strategy to strength supply of denitrified carbon sources of organic substances of inlet water in a sequencing-batch reactor, improve the denitrifying efficiency, and avoid biological toxicity inhibition caused by accumulation of nitrate nitrogen and adverse effects of biological toxicity inhibition on sludge granulation. Moreover, due to multi-step water inlet, the rich variable frequency of substrates is increased and sludge aggregation is promoted. The granulated sludge cultured by the method is helpful for improving the settling property of the sludge of the reactor and creating advantages for improving the biological denitrogenation performance of the reactor.

The invention discloses a composite artificial ecological floating island and a construction method thereof. The floating island comprises a sludge ecological floating island unit or a plurality of sludge ecological floating island units and a plurality of phycomycete biomembrane vector units. The construction method comprises the following steps: sludge powder which is subjected to innocent treatment, light materials and an inorganic adhesive are taken as raw materials to prepare the sludge ecological floating island units; porous macromolecular light suspension filler is simply processed to obtain the phycomycete biomembrane vector units; the phycomycete biomembrane vector units are pretreated and fixed on the sludge ecological floating island through flexible materials; and various floating island units are flexibly connected with each other through sponge or polystyrene foam. The composite artificial ecological floating island has raw materials available, low cost, stable chemical properties, friendly environment and no secondary pollution, reasonably utilizes waste sludge of sewage disposal plants, reduces urban sludge, and achieves the aim of reutilization of waste resources; and water purifying plants can be planted to form a miniature ecological community with microorganisms, have an all-around solid purification function on polluted water bodies, and the water purifying effect is better than that of a single floating island and phycomycete biomembrane vectors.

The invention relates to an expert system and method for preventing and controlling sludge bulking under the diagnosis based on operation condition of a sewage disposal plant, belonging to the crossing fields of an environmental engineering technology, a computer software technology and an automatic control technology, and overcoming the defects that the diagnosis speed is slow and man-made erroneous judgment is easy to make because the sludge bulking is analyzed, diagnosed and controlled manually only in the traditional sewage disposal technology. A knowledge base module is used for storing diagnosis methods and control methods, wherein rules are mainly established based on process running parameters and sludge sedimentation performances, and a man-machine interaction unit can be used for timely updating the methods stored in the knowledge base module and adding successful and unsuccessful cases during diagnosis and control. A database module is used for storing original data, offline detection data and secondary data acquired by an online monitoring instrument. An inference engine module is used for carrying out forward reasoning. An explanation engine module is used for explaining. A man-machine interaction unit is used for finishing information communication between users and the system.

The invention discloses a denitrify oxidizing lift waste biological reactor stuff field and filter liquid reflux technique, wherein the stuff field comprises a stabilize area, a stable methane area, a positive stuff area, while each area is connected with two filter liquid collecting pool, and each collecting pool is connected with one one-way valve connected with a filter liquid adjusting pool and connected to an on-site treatment sewage processing industry via valves. The invention utilizes the ability of biological reactor stuff field that absorbs nitrate and resists nitrated, and collects, pretreats and refluxes the filter liquid to obtain circular biological treatment conditions as aerobic, facultative, anaerobic, aerobic or the like. The invention can hold the COD density of outlet filter liquid under 1000mg/L, the NH3-N density under 15mg, and the total nitrogen remove rate higher than 90%.

The invention is aimed at the phenomena that an acidic waste storage yard of a non-ferrous metal mine is bare and barren due to the fact that pollutants are high in content and high in acidity. The following measures are taken to recover the vegetation of the area: (1) waste on the surface, calcium oxide and slag are mixed evenly and are maintained for 2-3 weeks; (2) a layer of sludge from a sewage processing factory or bottom mud generated in the dredging process of rivers, lakes and reservoirs is laid, then a layer of the calcium oxide is laid, and maintenance lasts for 4-5 weeks; (3) natural pioneer dominant plant species of the specific mine area are adopted, and then a natural recovery method is adopted to achieve the purpose of recovering the vegetation of the mine area. The method for recovering the vegetation of the acidic waste storage yard of the non-ferrous metal mine has the advantages of being easy and convenient to operate, low in cost and recyclable in waste.

The invention relates to a method capable of improving methane yield in a sludge anaerobic digestion process and enhancing heavy metal stabilization process. According to the method, corn stalk is utilized as a raw material to prepare stalk activated carbon under nitrogen protection and pyrolysis temperature of 550 DEG C; the stalk activated carbon is utilized as a carrier to react with a KMnO4 solution to finally obtain a nano MnO loaded activated carbon function material; in a sludge anaerobic digestion acid production stage, the nano MnO loaded activated carbon function material is added into an anaerobic reaction detection according to a proportion, cumulative gas production of methane in the sludge anaerobic digestion process is obviously improved, free-state heavy metal in the sludge can be effectively adsorbed and processed in a complexation mode at the same time, biological validity and mobility of the heavy metal are reduced, and the heavy metal stabilization process is enhanced. The method disclosed by the invention can be applied to residual sludge anaerobic digestion of urban sewage treatment plants, effectively improves the cumulative gas production of the methane, reduces biological validity of the heavy metal in the sludge anaerobic digestion process and enhances the heavy metal stabilization process.

This invention provides a method to granulate aerobic mud particles for degrading nitrohydroxybenzene, which includes following steps: a) active muds from aeration pools in sewage disposal plants are collected and transplanted into sequencing bioreactors; b) simulative organic sewage containing nitrohydroxybenzene is prepared; c) the simulative organic sewage containing nitrohydroxybenzene is pump into the sequencing bioreactor from the bottom; d) according to the running mode of the sequencing bioreactor, oxygen is kept off for 10~50 minutes and then air is provided from the reactor bottom with an aeration device; e) the temperature, pH value, hydraulic retention time, organic load and sedimentation time in the sequencing bioreactor are held for a certain period and then aerobic mud particles for degrading nitrohydroxybenzene can be obtained in the reactor. The aerobic mud particles cultivated in this invention perform greater activity and better sedimentation properties. The storage and transportation are convenient, and over 90% nitrohydroxybenzene can be removed.

The invention belongs to the technical field of sewage disposal technology and particularly relates to a concentrated and integrated sand and water separation device. The concentrated and integrated sand and water separation device aims at separating sand and water in sand and water mixed liquid discharged from a grit chamber of a sewage disposal plant, reinforcing removal of fine sand and reducing organic content on sand surfaces to further release a carbon resource. According to the technical scheme, the concentrated and integrated sand and water separation device comprises a sand concentrator and a sand and water separator; the sand and water separator comprises a collection hopper water tank and a spiral sand washing device; the sand concentrator is connected to the collection hopper water tank. The concentrated and integrated sand and water separation device is used for separating the sand and the water in the sewage disposal plant, reinforcing the removal of the sand, reducing the organic content on the sand surfaces and promoting organic entrapment.

The invention provides a rural domestic sewage disposal plant, mainly comprising a pool body with upper part thereof arranged with a water inlet pipe and a water outlet pipe. The invention is characterised in that: lower part of the pool body is an active sludge area and the upper part of the pool body is a light filter material area; water inlet pipe communicates with the active sludge area at the lower part of the pool body; and the water outlet pipe is arranged above the filter material area. Positive effects of the invention lie in that: multiple anaerobic biological treating technique combines anaerobic active sludge process and anaerobic contact process, effectively remove pollutants and has good water quality; the upper layer of the multiple anaerobic biological treating device is filled with light filter material which can well filter, prevent sludge flowing and reduce concentration of suspended solid of the disposed water; the multiple anaerobic biological treating device takes up small area, has no power consumed, has simple operation, convenient management and meets requirement of rural domestic sewage disposal.

The invention discloses a life sludge compost disposal method of a sewage disposal plant. The method includes: evenly premixing sludge with fermentation microorganisms prior to placing the mixture in a fermentation tank; sequentially performing primary fermentation (a main fermentation stage) and a secondary fermentation (an aging stage), drying fermented semi-finished products with test results capable of meeting standard requirements of NY525-2012 organic nutrition soil material products, and reducing moisture content to 30%; mixing the fermented semi-finished products with plant ash in a stock bin, adding fungicide after mixing, and performing measurement packing after scattering and sieving. With the method, sludge stabilization and harmless disposal facilities are improved, reduction of moisture content, removal of stink and killing of parasitic ovum and pathogens are further preformed, requirements on stability and harmlessness are achieved, and resource utilization on the obtained organic nutrition soil series products is performed.

The invention discloses a BCM (Biology Cilium Magnetic) biological sewage treatment system and a BCM biological sewage treatment process. The BCM biological sewage treatment system comprises a grill unit, a sand settling unit, a hydrolyze acidification unit, an anoxic unit, an aerobic unit, a sedimentation unit, a quick mixing unit, a quick sedimentation unit and a sterilization unit and further comprises a sludge shearing unit, a magnetic powder separation unit, a sludge concentration unit and a sludge dehydration unit, wherein sewage flows through the grill unit, the sand settling unit, thehydrolyze acidification unit, the anoxic unit, the aerobic unit, the sedimentation unit, the quick mixing unit, the quick sedimentation unit and the sterilization unit in sequence. The BCM biologicalsewage treatment process is that sewage flows through the grill unit, the sand settling unit, the hydrolyze acidification unit, the anoxic unit, the aerobic unit, the sedimentation unit, the quick mixing unit, the quick sedimentation unit, the sludge shearing unit, the magnetic powder separation unit and the sterilization unit in sequence. The invention ensures stable treatment, reaches the primary standards A of Urban Sewage Disposal Plant Contamination Integrated Discharge Standard, and can reduce investment cost, installation cost, construction cost and running cost, simplify operation, improve running stability and reduce energy consumption; and all the quality indexes of the treated sewage are stable and meet the standards, and the effect of removing dissolvable organic matters and the denitrification effect are favorable.

The invention provides an ammonia nitrogen treatment method of tanning waste water. The method comprises the following step that: a biological filter 1 is filled with clinoptilolite and then autotrophic nitrobacteria are fed in the filter 1 to carry out cultivation and biofilm formation (need to be carried out under the conditions of oscillation or ventilation because the nitrobacteria are aerobes); a biological filter 2 is filled with clinoptilolite and then heterotrophic denitrifying bacteria are fed in the filter 2 to carry out the cultivation and the biofilm formation (can be carried out just under a static condition because the denitrifying bacteria are anaerobes); the tanning waste water is fed in the biological filter 1 first so as to carry out oxygen supply treatment for 40 to 60 minutes; and then, waste water discharged from the biological filter 1 is fed into the biological filter 2 to carry out anaerobic treatment for 40 to 60 minutes. The ammonia nitrogen treatment method has the following main advantages that: COD in the secondary effluent of the tanning waste water can be reduced from 100 to 200mg/L to 40 to 80mg/L, while ammonia nitrogen content is reduced from 40 to 200mg/L to 10 to 35mg/L and total nitrogen is reduced by approximately 60 percent; therefore, the secondary effluent meets the requirements of treatment before the secondary effluent is fed into an urban sewage disposal plant; moreover, the ammonia nitrogen treatment method has large biofilm formation quantity, high ammonia nitrogen removing efficiency and lower cost of equipment and operation.

The invention discloses an urban inland river water quantity and water quality optimization regulation and control method. The method comprises the following steps: 1, carrying out current situation investigation on rainfall and evaporation quantity of an area, a pollution source of the area, hydraulic engineering of the area, river basic information, a river water environment, a river ecosystem and the like; 2, analyzing current situations such as regional pollution sources, river channel water quality and quantity, regional water environment capacity, river channel ecological water demand, regional fresh water availability, water regulation quantity and influence range, feasibility of water reuse in an intra-regional sewage treatment plant, regional water ecology and the like; and 3, providing a water quantity and water quality optimization regulation and control method. The method is based on deep analysis of the hydrological water environment in a city; an urban inland river waterquantity and quality optimization regulation and control scheme can be put forward in a targeted mode, and therefore the problems that the water body river network water quality is generally poor, thenitrogen and phosphorus content is high, the transparency is poor, the water supplementing source is single, a water ecosystem is imperfect, and the water body self-purification capacity is low in the urban inland river are solved.

The invention relates to a fuzzy intelligent system for additi0n of a water treatment medicament, the applied method comprises the steps of: in the first place, establishing a forecasting model of the controlled object online in light of the state and operating quantity of the controlled object, forecasting the control result maintaining the current operating quantity with the model, then in a control target evaluation, evaluating the control effect of the system and generating the result which adjusts weights of the fuzzy control, in terms of the current state and forecasting result of the controlled object, as a result of that, the fuzzy control can confirm the optimal operating increment. With an eye to vast territory of our country and plenty of tap water and sewage disposal plants, the invention has extremely extensive application and market prospects.