85results about How to "Good water quality" patented technology

A process for treating sewage by integrating sequential active sludge method with membrane-bioreactor features that the membrane assembly is put in bioreacting pool, its outlet is respectively connected to air inlet pipe and water outlet pipe via two control valves, the whole system sequentially passes through flow-in, reaction, discharge and idle steps, that is, anaerobic, aerobic and anoxic states, and said membrane assembly plays the roles of aerating unit in reaction step or separator in discharge step. Its advantages are simple structure and high effect.

Provided are integrated domestic sewage treatment equipment and treatment method. The integrated domestic sewage treatment equipment is formed by the following treatment units: a gridding feces tank, an anaerobic tank, an aerobiotic tank and a precipitating and sterilization pond, all of which are sequentially communicated. The integrated domestic sewage treatment equipment is characterized in that water inlet and outlet pipes are arranged between the treatment units, each treatment unit is provided with a mud discharging pipe and an exhausting pipe, the anaerobic tank and the aerobiotic tank are each provided with an aerating system and a flow-back system, a triangular weir is adopted in water outflow of each treatment unit, the input end of the water inlet pipe of the gridding feces tank is located outside the equipment, and an inlet penetrates into the portion, before a grid, at the bottom of the gridding feces tank; the gridding feces tank is connected with the anaerobic tank, the water inlet pipe of the anaerobic tank is communicated with the interior of the bottom of the tank for water inflow, and a filling area of the anaerobic tank is filled with a fixed carrier and biological sponge iron filler; the anaerobic tank is connected with the aerobiotic tank, the water inlet pipe of the aerobiotic tank is communicated with the bottom of the tank for water inflow, and a filling area of the aerobiotic tank is filled with a fixed carrier and biological sponge iron filler; the aerobiotic tank is connected with the precipitating and sterilization pond, the water inlet pipe enters the middle of a precipitating pond body, and a 45-degree slope is arranged in a sludge area at the bottom of the pond; the precipitating pond body is connected with a sterilization pond body, the water inlet pipe enters the bottom of the sterilization pond body for chlorine tablet sterilization, and water is output out of the upper water outlet pipe.

The invention discloses a method for disinfecting filtered water from a water plant with cooperation between medium-pressure ultraviolet catalyzing peroxymonosulfate and chloramines. The method includes following steps: adding peroxymonosulfate to outlet water from a water plant filtering tank to obtain a mixed solution with a concentration being 0.2-0.4 mmol/L through a tubular mixer; performing disinfection to the mixed solution in a medium-pressure ultraviolet disinfecting reactor, wherein an addition dosage of the medium-pressure ultraviolet is 10-20 mj/cm<2> and a disinfection time in the reactor is 5-10 min; and adding 0.3-0.4 mg/L chloramines to an end of the ultraviolet disinfecting reactor to complete the disinfection with cooperation between medium-pressure ultraviolet catalyzing peroxymonosulfate and chloramines. By means of the method, a cooperative effect of medium-pressure ultraviolet, peroxymonosulfate and chloramines fully works so that bacteria and microorganisms can be controlled in high efficiency and a reagent addition dosage and disinfection by-product can be reduced. Sustainability of disinfection and sterilization of water in a following water supply network can be ensured and drinking water safety can be ensured.

The invention provides a negative pressure strengthened multi-stage laminated disc type solar energy distillation system for desalination, which takes solar energy as a heat source to heat brackish water in laminated discs, and under the negative pressure chimney effect of a vacuum pump, the multi-stage cyclic utilization of condensation heat and evaporation heat between the multi-stage laminated discs is realized, the heat transfer efficiency is increased, and pure distilled water can be obtained with less energy consumption. The system has the advantages of compact structure, small floor area, and low cost for water preparation, and is suitable for desalinating brackish water in western villages and small towns.

The invention provides a method for treating pharmaceutical wastewater. After pharmaceutical wastewater of high salinity is evaporated and desalinated, coagulation and deposition of distilled water and pharmaceutical wastewater of low salinity are carried out, a supernatant is mixed and accessed to a neutralization pond; the materials pass an anoxic tank and an aerobic tank in order to carrying out a nitration reaction and a denitrification reaction, and finally the materials are filtered by a MBR membrane, in order to effectively degrade COD and ammonia nitrogen in the pharmaceutical wastewater. The removal rate of COD reaches 90% or above, and the removal rate of ammonia nitrogen reaches 87% or above. The method for treating pharmaceutical wastewater has the advantages of simple operation, good effluent quality, and stable operation.

The invention provides a preparation method of a polyamide reverse osmosis membrane modified by graphene oxide subjected to acylating chlorination. The preparation method includes soaking a supporting layer in a water-phase solution containing a polyfunctional aromatic amine compound and then in an oil-phase solution of polyfunctional group acyl chloride; soaking a product in a modifier solution containing graphene and thionyl chloride in an isoparaffin solvent, wherein the graphene refers to monolayer graphene or monolayer graphene oxide; drying to obtain the polyamide reverse osmosis membrane modified by the graphene oxide subjected to acylating chlorination. The preparation method has the advantages that the graphene oxide subjected to acylating chlorination is grafted on the surface of a polysulfone ultrafiltration membrane successfully through selection of a specific monolayer graphene material, and accordingly water flux and salt removing rate of the reverse osmosis membrane are guaranteed while good antibacterial performance is achieved.

The invention discloses a membrane separation process for treating lead-zinc smelting wastewater, which comprises the following steps: pretreating lead-zinc smelting industrial wastewater through the processes of a multi-media filter, ultrafiltration, and the like after the wastewater reaches the discharge standard after the treatment of a heavy metal precipitation process; and performing desalinization treatment on the wastewater by a nanofiltration process, wherein water is produced for recycling and a concentrated solution reaches the standard after an intensified coagulation treatment and is discharged. The membrane separation process has the advantages of high wastewater recovery ratio by adopting a membrane process to perform recycling treatment on the lead-zinc smelting wastewater, good recycling water quality, advanced performance and economical practicability, high automation degree, and simple and convenient manual operation.

The invention discloses a comprehensive wastewater reuse treatment method for a waste incineration power plant. The method comprises the steps of production sewage pre-treatment, flue gas wastewater pre-treatment, domestic sewage pre-treatment, landfill leachate pre-treatment, reverse osmosis deep treatment and dehydration treatment. According to the method, landfill leachate and domestic sewage are mixed and subjected to facultative and aerobic treatment, so that COD and NH3-N in the landfill leachate can be effectively reduced, the proportion of pollutants in sewage can be balanced, the mixed liquid has good biodegradability, and the effluent quality is good; the pretreated production wastewater, the biodegraded landfill leachate and domestic sewage are subjected to combined deep treatment, and only one set of treatment device is needed, so that the investment cost is reduced; and sewage combined treatment is adopted, so that the content of COD and heavy metal ions in the sewage which enters a reverse osmosis system can be effectively reduced, the problem of reverse osmosis membrane blockage can be effectively relieved, the frequency of chemical cleaning can be reduced, and the service life of the reverse osmosis membrane can be prolonged.

The invention provides a high-concentration organic pharmaceutical wastewater treatment method. According to the high-concentration organic pharmaceutical wastewater treatment method provided by the invention, high-concentration process wastewater and low-concentration wastewater are subjected to quality division and flow division, the high-concentration process wastewater is subjected to multi-dimensional electrocatalytic oxidation and high-efficiency micro-electrolytic oxidation, after the biotoxicity and the COD (Chemical Oxygen Demand) are reduced, the high-concentration process wastewatercan enter a biochemical treatment system after being mixed with low-concentration pharmaceutical wastewater and domestic wastewater, and finally, the wastewater can be filtered through an MBR (Membrane Bioreactor) membrane module, so that the COD and ammonia nitrogen in the pharmaceutical wastewater can be effectively degraded, three-level standard in Comprehensive Wastewater Discharge Standard (GB8978-1996) is met, and the wastewater can be discharged by accessing to a wastewater pipe network; the high-concentration organic pharmaceutical wastewater treatment method is simple in operation, good in effluent quality and stable in running.

The water treatment process adopting electrolysis and packed filtration cleaning mode includes the following steps: 1. pumping the water to be treated into electrolytic equipment; 2. adopting D.C. electrolysis; 3. after D.C. electrolysis, in the water in the electrolytic cell producing H2, O2, CO2 and Cl2, etc.; and 4. feeding the water treated by electrolysis into packed filter, in which the manganese sand, quartz sand, active carbon, magnet ore and quartz, etc. can be filled. Said invention utilizes the bubbles produced by electrolysis and electrolytic oxidation of organic matter to separate the gases of H2, O2, CO2 and Cl2 from water, and utilizes the oxidation filtration so as to clean water.

The invention relates to a hospital sewage treatment MBR process. The process includes the following treatment steps that 1, hospital sewage enters the water inlet of the upper portion of a box body of a sewage treatment box, and solid and liquid separation is achieved after the sewage is filtered through a filtering grating; 2, liquid sewage enters a hydrolysis acidification pool, and hydrolysis acid producing bacteria are placed in the hydrolysis acidification pool; 3, acidified sewage flows into an anaerobic digester and enters an aerobic tank; 4, a sludge and water mixture obtained in the step 3 is further treated and enters an MBR membrane pool connected with the bottom of the aerobic tank. By means of the technical scheme, the occupied area is small; the MBR membrane sewage treatment process and the traditional activated sludge process are combined, and the outlet water quality is good and stable and is not influenced by MBR membrane quality and water source problems. The outlet water quality is stable, and no sludge expansion is produced. Operation is easy, construction is convenient, and no special maintenance is needed.

The invention provides a solar seawater desalting device with a variable flow, which comprises a photovoltaic solar power supply system, a reverse-osmosis seawater desalting device and a frequency-conversion control system, wherein the reverse-osmosis seawater desalting device is provided with two branches connected in parallel, the first branch is sequentially provided with a seawater medium-pressure pump, a first one-way check valve and a differential-pressure energy recovering device from front to back, the delivered liquid enters the differential-pressure energy recovering device after being pressurized by the seawater medium-pressure pump, and the pressure of the delivered liquid is boosted to the rated pressure of a reverse-osmosis membrane module by the differential-pressure energy recovering device; and the second branch is sequentially provided with a seawater high-pressure pump and a second one-way check valve from front to back, and the pressure of the delivered liquid is directly boosted to the rated pressure of the reverse-osmosis membrane module by the seawater high-pressure pump. The solar seawater desalting device can independently run by utilizing solar energy so as to have low equipment cost and running and maintaining cost, can utilize the peak valley characteristic of solar power generation, furthest increases water yield and is suitable for remote islands, boats and families short of power supply.

The invention relates to an apparatus for treating coking wastewater through immobilized MBR autotroph nitrogen removal, and a method thereof. The apparatus is composed of a water feeding system, an aeration system, a membrane bioreactor, a water discharging system and a water-bath circulating system. An autotroph nitrogen removal technology is carried out by adopting the membrane bioreactor, a microbe immobilization technology is introduced, and a carrier used by microbe immobilization is arranged in the membrane bioreactor to improve the running performances of the reactor, so microenvironment suitable for growth of aerobic ammonia oxidizing bacteria and anaerobic ammonium oxidation bacteria is provided, and the membrane pollution is alleviated. The method has the advantages of no external carbon source, good wastewater treatment effect and low cost.

The present invention relates to the technology of organic chemical effluent treatment. The pre-treating method can reduce the consumption of extracting agent, and the CODcr eliminating rate of the effluent in the pre-treatment may reach 60% being favorable to subsequent biochemical treatment. The process includes the acidifying pre-treatment of oxide effluent from metacresol production, the extracting treatment with extracting agent, such as tributyl phosphate, mixing of the effluent after the extracting treatment and other two kinds of waste water discharged from metacresol production, and the subsequent biochemical treatment. The said pre-treating process can eliminate great amount of hard-to-degrade matter to raise the efficiency of biochemical treatment and recover high purity phenol matter.

The invention provides a baffled multistage disc distiller enhanced by externally adding a negative pressure. Bitter in a disc is heated by utilizing a heating pipe at the bottom; one side of the distiller is provided with a steam lifting flow channel, and a large amount of steam is evaporated below a boiling point through negative pressure suction of a vacuum pump; after pumping, condensation is carried out so as to obtain fresh water, thereby achieving the effect of salt-water separation. The distiller can also be externally connected with a solar heat collector for heat supply, thereby greatly saving energy consumption.

The invention relates to an industrial in-parallel water inlet two-stage disc filter, and belongs to the field of water treatment equipment. The filer comprises an inner cylinder, the interior of theinner cylinder is provided with a filter element, the filter element comprises a primary filter element and a secondary filter element arranged from the top to the bottom, the secondary filter elementcomprises a lower flow-guiding disk and a flow guiding disk, a division flow-guiding disk is arranged between the primary filter element and the secondary filter element, and the division flow-guiding disk comprises an upper division flow-guiding disk and a lower division flow-guiding disk; and the lower end of the inner cylinder is provided with a sewage outlet, a purified water outlet and a rawwater inlet. The filter provided by the invention has the following beneficial effects: raw water is filtered twice, the purity is high, the effluent water quality is good, and electrical conductivity of the purified water subjected to two-stage filtration is less than 2 [mu]s/cm; a nano ultrafiltration membrane is adopted to ensure that mineral substances in water are retained while a purified water standard is achieved, and harmful substances can be filtered to achieve the purposes of safety and health; and the product realizes two-stage filtration of one filter element, and has a small occupied space.

The invention discloses an inner circulation air pressure tank water supply device. The inner circulation air pressure tank water supply device is mainly composed of a water pump, a control cabinet, a pressure detecting meter and an air pressure tank. The air pressure tank is mainly composed of a tank body and an air bag. In order to avoid stagnant water, a water distribution pipe is arranged in the air pressure tank and extends into the air bag for water filling, a water outlet of the air bag is additionally formed, and inner circulation is formed between a water inlet part and the water outlet part of the interior of the air bag, so that the excellent water quality in the air bag is guaranteed, and the possibility of accumulated water and the stagnant water in the air bag in a normal system is eliminated. The inner circulation air pressure tank water supply device has the beneficial effects of being simple in structure, convenient to install, low in cost and the like; in addition, the water supply pressure is stable, energy is saved, the water quality is sanitary, and the inner circulation air pressure tank water supply device can be widely suitable for the secondary water supply fields such as air pressure water supply, frequency conversion constant pressure water supply and non-negative-pressure pipe network pressure-superposed water supply.

The invention discloses a dark-red enameled electric-heating bottle, comprising a bottle cap, a casing, and a liner, a bottle base, a heating device, and a circuit controller inside the casing, wherein, an water outlet device is arranged on the bottle cap, and the top end of the liner is provided with a raised edge, characterized in that the peripheral of the raised edge on the top end of the liner is connected with a fastening device for mounting and fixing the liner capable of adaptively adjusting according to the change of the size of the liner, the adaptive fastening device comprises a fastening ring, a steel sheet, and a correction ring equipped with an elastic mechanism, the fastening ring is fixed between the top end of the liner and the bottle cap, the steel sheet is disposed on the bottom of the raised edge, and a waterproof ring is arranged on the raised edge, and the correction ring supports against the outer edge of the raised edge. The inventive product has reasonable and simple structure, and good dry-burning protection performance, and is convenient to replace and clean. Because the liner is made of violet sand earthenware, yellow spot and rust spot will not occur after use at high temperature for a prolonged period of time, thereby ensuring the quality of drinking water.

The invention discloses a fly ash leaching solution treatment method and system. The fly ash leaching solution treatment method comprises the following steps: adjusting the pH of a leaching solution to be 8 to 11 in a primary reaction tank, then feeding the leaching solution in various reaction tanks, separately adding a heavy metal chelating agent and a flocculating agent, generating alumen ustumparticles, standing, precipitating, adjusting the pH to 3 to 5, adding a Fenton reagent, standing, precipitating, introducing supernatant into a purification tank, purifying the supernatant, treatingby using a membrane treatment unit, thus obtaining reverse osmosis production water and a reverse osmosis concentrated solution, wherein the produced water is good in quality, the produced water is recyclable, evaporating and crystallizing the reverse osmosis concentrated solution by virtue of an evaporation unit, recycling salt substances, wherein the recycled salt substances can be used for producing industrial salt. The treated solution can be recycled, so that the zero emission of waste water can be realized; the crystal salt can be produced; the fly ash leaching solution treatment methodis an environment-friendly, safe and efficient treatment method, the environment pollution problem caused by the fly ash leaching solution produced after the garbage is incinerated can be solved, thesystem operation is simple, the equipment requirement is simple, and the system operation is reliable.

The invention belongs to the technical field of sewage treatment and relates to an intensive type rural domestic sewage treatment system which comprises composition units including a grid, a regulating pond, a biochemical pond, precipitation and filtration integration equipment and the like. Sewage enters the regulating pond after passing through the grid firstly and then enters the biochemical pond; the biochemical pond can be rapidly started by adding a composite new bacterium by one time; in a contact process of the sewage and a biofilm, organic matters in water are adsorbed and decomposed through a special effect aerobic bacterium to produce CO2 and H2O; ammonia nitrogen is effectively and rapidly treated under the action of bacterial flora including an aerobic ammonifier to produce N2; and effluent of the biochemical pond enters a precipitation and filtration integration device, so that mud and water are separated from each other to enable the effluent to be further clarified, and the effluent subjected to treatment reaches the emission requirements and can be drained or reused. The intensive type rural domestic sewage treatment system is small in occupied area, little in investment, good in quality of the effluent and stable and convenient to run, can be rapidly started, can effectively treat rural domestic sewage and effectively protects a rural water resource environment.

The invention relates to a beneficiation wastewater treatment method circularly used for a ceramic filter, which comprises the following steps: evenly mixing beneficiation wastewater, and adjusting the pH value of the wastewater; adding sodium carbonate to generate sediments of calcium and magnesium ions; adding aluminum sulfate and an anionic flocculant to remove solid particles and ion sediments of heavy metals of copper, lead, zinc and the like in the wastewater through chemical coagulation reaction; adding sodium hypochlorite to kill algae and microorganisms in the wastewater; and performing concentration-precipitation, sand leach and ultrafiltration to finally obtain treatment reuse water which is clean and unblocks pores of the ceramic filter. The water obtained after the treatment of the beneficiation wastewater of a mine by using the method has good water quality, and has the effect that the pores of the ceramic filter are not calcified and blocked and the filter effect is normal after the water is reused by the ceramic filter; and the water after the treatment is applicable to ceramic filters with high water quality requirement and can be used as other production water in the mine, and is particularly applicable to mines using the ceramic filters. The method has obvious effect of achieving wastewater complete utilization and zero discharge and reducing fresh water consumption for concentration plants.

A method and system for computing a stable index value of fresh water based on water quality category and/or grade from current values of root commodities (i.e. freely marketed products) that either have fresh water as a constituent and/or utilize fresh water in their production, usable to develop a stable investment instrument for investing in fresh water. A processor may process associations between a root commodity and a water quality category of fresh water. A display associated with a computer may display updateable current prices of fresh water of a particular water quality category and/or grade and updateable current prices of one or more root commodities. A water measurement device may measure at least one water source of fresh water with respect to at least one of TDS, carbonate content, pH, hardness, sodium, chloride, nitrate, toxins and sodium adsorption ratio and compare against standards to categorize the fresh water.

Disclosed is a self-propelled type crawler belt type water saving irrigation machine which belongs to agricultural machinery. An n-shaped rack assembly formed by a left rack and a right rack is equipped with dividers, a cab, a hydraulic oil tank, a main water tank, a walking crawler belt assembly, a hydraulic oil pump and a motor, wherein a right side water tank and N middle water tanks are hanged on the right rack, a left side water tank is hanged on the left rack, the hydraulic motor is installed on a drive shaft of the walking crawler belt assembly, the motor is connected with the hydraulic oil pump and a booster fan, the booster fan is communicated with the main water tank through a high pressure air pipe, the main water tank is communicated with the right side water tank through a water pipe, the right side water tank is communicated with the N middle water tanks and the left water tank through a distributive pipe, drain valves are fixedly arranged on the lower portions of the rear sides of the right water tank, the left water tank, and the N middle water tanks, the hydraulic oil tank, the hydraulic oil pump, the hydraulic motor and a manual multichannel control valve are communicated with one another through a hydraulic oil pipe. The self-propelled type crawler belt type water saving irrigation machine is simple and reasonable in structure, low in power consumption, good in water supply quality, and high in working performance.

The invention relates to a coating production line and particularly relates to a coating water purification system which is realized by the following technical scheme that: the coating water purification system comprises a raw water tank, a raw water pump connected with the raw water tank, a mechanical filter connected with the raw water pump through a pipeline I, an active carbon filter connected with the mechanical filter, a high-pressure pump I connected with the active carbon filter through a pipeline II, and a reverse osmosis set I connected with the high-pressure pump I. Compared with the background technology, the coating water purification system is more energy-saving and environment-friendly and has lower cost.

The present invention discloses a reverse osmosis water purification and dispensing machine structure and an energy saving method therefor. An inlet of a self-priming booster pump is connected to an external water source, an outlet of the self-priming booster pump is connected to an inlet of a prefiltering system, and an outlet of the prefiltering system is connected to an inlet of a reverse osmosis membrane; a water outlet end of the reverse osmosis membrane further comprises a purified water outlet and a concentrated water outlet, and purified water accesses a user for use by the purified water outlet. According to the present invention, under conditions of a designed temperature, pressure and the like, the produced purified water is good in water quality, thereby greatly improving the recovery rate of a water purification system; it is ensured that states of the waterway such as the operating pressure is maintained at conditions such as the design pressure, thereby greatly reducing the electrical energy consumption; the concentrated water formed on the surface of the reverse osmosis membrane can be discharged in time when the booster pump performs replenishment for the next time, thereby ensuring the freshness of water entering by the surface of the reverse osmosis membrane, and greatly prolonging the service life of the reverse osmosis membrane; and after operating for every certain period of time M min, Ns flushing is performed, with an intention of washing the reverse osmosis membrane, thereby further prolonging the service life of the reverse osmosis membrane.

An anti-bacterial wet-wipe, reversible to scented plastic poop bag. Utilized to clean, sanitize, and collect and contain animal waste. Especially for wiping canine buttocks, but not limited to, and fur from feces after defecation in order to prevent insect bites that cause disease by way of bacteria. Wiping, picking up and securing of fecal matter of animal are made easy. Two unique layers; an anti-bacterial wet wipe and a water-repellent scented, odor eliminating plastic layer, defined by a hollow material for the insertion for the hand and thumb placement. Outer layer of medicated or natural (anti-bacterial) solution made of cotton material, but not limited to. At the edge of the inner plastic layer, an adhesive tape/strip that secures fecal matter (animal waste) inside before disposal. With this present invention, it is possible to provide a thumb insertion in mitten-like fashion, thus offering a great flexibility during wiping, cleaning, and picking up of substances (fecal matter), without contamination to the hands. This present invention may also be used for cleaning and wiping all pet areas that veterinary hospitals, zoo's, and general areas, where sanitization is required. It is the primary objective of the present invention to overcome two problems. One, to serve as a device for wiping, cleaning, sanitizing of animal and for collecting and securing fecal matter (animal waste), and two, to aid in the prevention of Zoonotic disease to animal's caused by insect bites, and to have a clean environment free from bacteria. Due to the unique construction of material, anti-bacteria solution, and odor eliminators, with the addition of the strong adhesive tape/strip that secures fecal matter tightly, it prevents the spread of odor and bacteria in the environment. Furthermore by wiping the animal, the present invention contains natural and medicated substances that kill bacteria and eliminate odor from pet, keeping pet clean and sanitized.

The invention discloses a clarification tank. On a basis of a micro-vortex flocculation technology, a device which can form sludge circulation is adopted, such that advantages of traditional water processing processes can be preserved, and defects thereof can be made up. Therefore, an optimal treatment effect can be achieved. According to the clarification tank with the submersible reflux pump composite micro-vortex reaction process, the tank comprises a tank body structure. A central cylinder is arranged at the center of the tank body. A water inlet pipe is arranged at the middle-lower part of the tank body. The bottom of the tank is provided with a gentle slope and a sludge discharge pipe. The central cylinder comprises a reaction first zone and a reaction second zone. The reaction first zone has a tapered cylindrical shape. The reaction second zone is welded on the periphery of the reaction first zone. The bottom of the reaction second zone is annular and is manufactured with steel. The inner ring is welded with the reaction first zone, and a concrete peripheral cylinder is sealed on the outer ring. Micro-vortex flocculators are filled in the reaction first zone and the reaction second zone. A flow guide device is arranged on the bottom of the side of the reaction second zone. An umbrella-shaped plate is arranged below the flow guide device. A submersible reflux pump is arranged on the bottom of the reaction first zone. A multi-point water distribution system is also arranged at an end of the water inlet pipe.

The invention relates to a fishery breeding device, in particular to a water-circulated fishery multi-functional pond which can purify water quality and enable water to be circulated for use. A communicating pipe which communicates with an inner bin and is near the bottom of the inner bin is arranged on the hopper wall of a conical hopper, and a sewage collecting and precipitating bin is arrangedat the bottom of the conical hopper; a circulating water pump is arranged outside a pond body, a water inlet pipe of the circulating water pump communicates with the bottom of the inner bin, and a water outlet pipe communicates with the upper part of the pond body; and biological fillings are arranged in the inner bin. According to the water-circulated fishery multi-functional pond disclosed by the invention, in the breeding process, excrement and urine of aquatic products and feed residues slide downwards into the sewage collecting and precipitating bin along the conical hopper; besides, water in the inner bin is circulated into the pond body from the water outlet pipe by the circulating water pump, because the water outlet direction is tangent to the inner wall of the pond body, the water can be pushed to move to form a whirlpool, and sewage collection is convenient; and in addition, the biological fillings are also arranged in the inner bin and can achieve better purifying effects on the water quality, so that the circulated water quality is well maintained, and growth of the aquatic products is convenient.

The invention discloses a sewage reuse system and a sewage treatment method. The sewage reuse system comprises a sewage treatment system and a reclaimed water reuse system, wherein the sewage treatment system comprises a primary water treatment system and a secondary water treatment system, the primary water treatment system is used for treating domestic produced sewage to form wastewater and reuse water, and the secondary water treatment system is used for treating the reuse water to form residential domestic water and reclaimed water; and the reclaimed water reuse system is used for conveying treated waters from the sewage treatment system to different use occasions according to the quality of waters. The treatment method comprises the following steps: treating the domestic production sewage by the primary treatment system to form wastewater and reuse water, and treating the reuse water to obtain domestic water consumption standard reaching water used as the residential domestic water and domestic water consumption standard unreaching water used as the reclaimed water. The above technical scheme alleviates the shortage of water resource and the pressure of pollution discharge and environmental protection.

The invention discloses a small-town rural sewage processing technology. The technology is characterized by comprising a mechanical grill, an eddy flow sand basin, an aeration equalizing tank, a composite A/O technology, MBR, a secondary sedimentation tank, disinfection and reuse. A septic tank effluent passes through the mechanical grill, the eddy flow sand basin, and the aeration equalizing tank, then is introduced into a composite A/O reaction tank and a MBR reaction tank, anacerobe is used for degrading a complex organic matter in sewage, the sewage biodegradability is improved, the effect of a biomembrane for converting the organic pollutants to ammonia nitrogen, through the aerobic nitrification and anoxic denitrification processes, the ammonia nitrogen can be removed, phosphorus-accumulating bacteria is used for absorbing phosphor in the sewage at an aerobic phase for removing phosphate; the processed sewage is absorbed into the secondary sedimentation tank for solid-liquid separating, the effluent is disinfected and reused, a part of sludge is introduced into the ABR reaction tank for phosphate removing, and the residual sludge is concentrated. The technology has the characteristics of high biological nitrogen and phosphorus removal efficiency, low investment operation cost, stable and reliable operation, strong resistance to impact load, and simple operation management.