102results about How to "Large amount of water to be treated" patented technology

The invention discloses a reclaimed craft to dispose electroplating waste water, which comprises the following steps: adopting oxidation-reduction and chemical precipitation disposing method and film technology (fold filtration, hyperfiltration, Na filtration and reverse osmosis desalination) deep purifying method; avoiding accumulation of salt effectively; reverse osmosis sloughing monovalent salt at last grade; trapping bivalent salt in innocent treatment system; proceeding depositing treatment continually; removing accumulating BOD and COD in water body through biochemical treatment effectively; realizing zero discharge of waste water.

The invention provides an advanced oxidation-separate salt crystallization combination system and technique of high-salt-salt industrial wastewater, relating to the technical field of water treatment. The technique comprises the following steps: sending high-salt-salt industrial wastewater treated by a pretreatment membrane system into an ozone advanced oxidation device, and standing in the presence of an ozone catalyst at the ozone specific loss of 1.2-3.0 kg O3 / kg COD (chemical oxygen demand) for 2-4 hours, wherein the COD of the treated effluent water is less than 50 mg / L; and sending into a crystallizing system to carry out crystallization treatment, wherein sodium sulfate concentrated water enters a refrigerating crystallizing system, and sodium chloride concentrated water enters a multi-effect evaporation (or MVR (mechanical vapor recompression) evaporation) device. The technique greatly lowers the wastewater COD content, increases the crystal salt purity, has the characteristics of simple operation, low cost, high water treatment quantity, high adaptability and stable water quality, and reduces the blockage problem of the crystallizing equipment.

The invention discloses a method for restoring micro-scale polluted reservoir water by using situ bio-contact oxidation. The method comprises the following steps: adopting fiber and sponge combined ball-type packings which are independently developed as carriers to perform screening, placing high effective strain which is obtained through screening in culture solution 'HS enrichment medium' to perform enrichment culture, then inoculating the strain which is through the enrichment culture in 'HSK culture medium' to perform expending cultivation and prepare biological microbial inoculum, placing packings in the microbial inoculum to perform biofilm formation and obtain biological immobilized packings; connecting the prepared biological immobilized packings with a string to fix the packings around the laboratory patented device water-lifting aerator of the invention and adopting water-lifting aeration-situ bio-contact oxidation to perform bioremediation to the micro-scale polluted reservoir water. The method of the invention can be used to effectively reduce the concentrations of COD, N, P and other pollutants in reservoir water and especially effectively lower the total nitrogen content of the micro-scale polluted reservoir water so as to fundamentally resolve the pollution problem of reservoir water, inhibit the growth of algae and control water eutrophication.

The fluorine and arsenic removing water purifier consists of mainly attapulgite powder and active carbon, and is prepared through activating attapulgite powder, mixing activated attapulgite powder with active carbon in certain ratio, crushing to 80 mesh, crushing polyaluminium chloride powder to 80 mesh and other steps. The fluorine and arsenic removing water purifier has high fluorine and arsenic removing capacity, and can also eliminate inorganic heavy metal ions and polar and nonpolar organic molecules from water. The present invention may be used in purifying various kinds of surface polluted water, domestic sewage and industrial effluent, has low cost, easy use and great water treating capacity, and is suitable for rural district.

The invention discloses an organic pollutant enriching device and method for pretreatment of a water sample with bulk mass. The organic pollutant enriching device comprises a water storage tank, a peristaltic pump, an enriching column and a valve, wherein the enriching column comprises a glass tube, as well as two layers of glass cotton and a layer of resin which are arranged at the lower end of the glass tube; the resin is arranged between the two layers of glass cotton; water delivery hoses on the upper end of the glass tube are connected with the water storage tank; the lower end of the glass tube is provided with a drain tube on which the valve is arranged; and the water delivery hoses are all connected with the peristaltic pump. The method comprises the following steps of: a. regulating the peristaltic pump to ensure that the adding speed of the water sample is 10-120mL / min; b. introducing the water sample to the enriching column, retaining substances with large particles above the upper layer of glass cotton in the enriching column, and enriching organic matters in the water by using the resin. By means of the device and method disclosed by the invention, the defect that the simultaneous treatment on a water sample with large dose and various samples can not be realized by using a traditional solid-phase extracting device is effectively overcome, meanwhile, different types of organic matters in same batch of water samples can be enriched.

The invention relates to the technical field of membrane separation, and particularly relates to a membrane module for a novel efficient membrane bioreactor. The membrane module comprises an upper end cover (6), a membrane module housing (5), a lower end cover (3), a soft pouring material (9) and hollow fibre membrane silks (10), wherein the upper ends of the plurality of hollow fibre membrane silks (10) are hermetically bonded at an upper port in the membrane module housing (5), and the lower ends of the hollow fibre membrane silks (10) freely drop inside the membrane module housing (5) to form an overhanging structure; and plugging heads (11) are arranged at the bottom ends of the hollow fibre membrane silks (10). The membrane module disclosed by the invention has the advantages that due to the design of the overhanging membrane silks, the membrane module is not easily plugged by dirt and is easy to wash and maintain; due to a positive-pressure operation, the membrane module is large in membrane flux and water treatment amount and small in occupied area is small; external-pressure type membrane silks resist pollution; and the membrane module is suitable for a higher activated sludge concentration and higher in treatment efficiency, low in running energy consumption, long in service life, and low in price, thus saving investment.

The invention provides a multi-direction flow gravitational settling apparatus for a recirculating aquaculture system. The cavity of a vertically arranged barrel-shaped water passing container is divided into an upper straight barrel-shaped settling chamber and a lower inverted cone-shaped sewage collecting chamber by a separator plate horizontally arranged in the water passing container; the upper end of the water passing container is an open end, and the end part of the upper end is embedded into a water collecting tank with an upwardly opened opening; the lower end of a 7-shaped water inlet pipe extends downwardly to penetrate the bottom of the water collecting tank, and the upper end of the 7-shaped water inlet pipe extends into the upper part of the settling chamber to communicate with the upper end of a vertical water distribution pipe; the port of the lower end of the water distribution pipe extends into a central through hole of the porous separator plate; an inclined tube filling material is filled in the part of the settling chamber below a water outlet end of the water inlet pipe; a sewage outlet is arranged at a cone bottom of the sewage collecting chamber; and the sewage outlet is movably covered with a water distributing cone, and the conical tip of the water distributing cone just faces the port of the lower end of the water distributing pipe. The apparatus provided by the invention has a simple structure, a compact shape, great water treating capacity, short hydraulic retention time and a substantial treating effect, is convenient to apply and can be popularized as equipment.

The invention relates to the field of drainage and purification treatment in coal mines, and in particular relates to an underground mine water treatment system. The underground mine water treatment system comprises a preliminary sedimentation tank, a mixed reaction tank, a super magnetic separator and a filter which are connected in sequence, wherein the super magnetic separator is connected with an underground sump; the underground sump is connected with the filter through a drainage pump; the filter is connected with a clean water tank; the preliminary sedimentation tank, the mixed reaction tank, the super magnetic separator, the underground sump and the drainage pump are arranged in an underground water treatment chamber; the filter and the clean water tank are arranged on the ground. According to the mine water treatment system, based on the characteristics of short solid-liquid separation time, high efficiency, small equipment and the like of the super magnetic separation equipment, the mine water treatment system is constructed in an underground roadway; compared with the conventional mine water treatment station, the underground mine water treatment system has the advantages that the system is not influenced by seasonal temperature changes, the quality of the treated water is stable, pump lifting is not required, a little amount of chemicals is consumed, the operation cost is saved, and the system is constructed underground to save the floor area.

The invention discloses a hydrogenation and deoxidization method for palladium ion type catalytic resin, which comprises dissolving palladium chloride in distilled water, agitating homogeneously, passing palladium chloride solution through contacting tower containing strong acid type cationic ion-exchange resin, rinsing with water, drying at room temperature, letting hydrogen gas into resin for reduction, letting water with dissolved oxygen from the top of the packed column, sprinkling onto the whole cross-section homogeneously through a liquid distribution apparatus, lifting the water with dissolved hydrogen gas with a pump, injecting into a contacting tower incorporating palladium ion type catalytic resin, and passing water through palladium ion type catalytic resin.

The present invention provides oxygen-rich biological pre-treating process for slightly polluted raw water featuring the biological action of high aerobic oligotrophic microbe. Based on the bioreaction characteristic of oligotrophic microbe in oxygen-rich aeration condition with DO of 10-15 mg / l, oligotrophic microbe, such as soil bacillus, hydrophilic aeromonad, flavobactreium, etc is used to eliminate pollutant in high aerobic condition through biological oxidation. Compared with other treating technology, the present invention has the advantages of high treating efficiency and low running cost. The present invention may be used to replace chemical pre-treatment process with Cl2, KMnO4, O3, etc.

The invention relates to the technical field of plasma application, and discloses a device for reacting discharge plasmas positioned on the gas-liquid interface of a swirl gas column. The discharge is generated on the gas-liquid interface of the swirl gas column. The device comprises a swirler, an electrode, a high-voltage power supply, a gas-liquid mixing pump, an air compressor and a water tank, wherein the swirler can form a gas column; the electrode is matched with the gas column; and the gas-liquid mixing pump provides a liquid to be treated, which is mixed with a gas-phase medium, for the swirler. According to the device, the liquid to be treated, which is mixed with a gas-phase medium, enters the swirler after being increased to a certain flow velocity, the gas column is generated under the action of centrifugal force, the discharge electrode is switched on with the high-voltage power supply and then generates a high-intensity electric field in a short-distance hollow cylinder positioned between the gas-liquid interface and the outer surface of the electrode, and the gas-phase medium positioned in the high-intensity electric field is activated and generates the phenomenon of annular glow discharge, so that the plasma is generated, and the energy consumption can be reduced to 5-15 W. The device provided by the invention has a function equivalent to directly placing an ozone generation part into the liquid to be treated in an ozone oxidation process and has the advantages of large treatment amount, low energy consumption, simple structure and easiness for popularization.

The invention discloses a method for removing heavy metal ions from electroplating wastewater, and belongs to the field of wastewater treatment. The method includes the steps of step 1, crushing pyrite cinder into particles with 80-100-meshed particle size to obtain activated pyrite cinder; step 2, crushing phosphogypsum into particles with 80-100-meshed particle size to obtain activated phosphogypsum; thirdly, adding the activated pyrite cinder obtained in the step 1 and the activated phosphogypsum obtained in the step 2 into red mud; fourthly, adding water into the obtained red mud mixture,mixing well, and evaporating at high temperature till moisture content reaches 55%-65%; and fifthly, adding the treated red mud mixture into the electroplating wastewater, performing solid-liquid separation after suspended sludge particles settle, and allowing supernate to be discharged standardly. The method has the advantages that process flow is simple, running, operation and management are convenient, investment is low, energy consumption is low and the like. Therefore, comprehensive utilization of waste is achieved, treatment of wastes with processes of wastes against one another is achieved, and the wastes are turned into wealth.

The invention belongs to the field of sewage treatment and relates to a technology for distributed treatment on domestic sewage from small rural towns. The technology comprises that domestic sewage is treated orderly by a grid, a regulating tank, a magnetic separation device and a constructed wetland and then forms product water. The technology has the advantages of small floor space, short flow, convenient equipment operation, low operation cost, no secondary pollution and flexible treatment on a load change, and is suitable for being popularized in small rural towns of China.

A water treatment combined system in A / O biological reaction tank-artificial wetland is provided, wherein a filter grid is connected with an aeration grit settling tank, the aeration grit settling tank is connected with a biological contact oxidation pretreating tank, the biological contact oxidation pretreating tank is connected with an A / O biological reaction tank (an anaerobic-aerobic biological reaction tank), the A / O biological reaction tank is connected with a water distributing well, the water distributing well is connected with a secondary settlement tank which is connected with an artificial wetland, and the height of filler in the artificial wetland is not higher than 0.9m. The water treatment combined system can organically combine a biological system and an ecological system, has the characteristics of large water treatment amount, excellent water outlet effect, lower operation cost, ecology, safety and stable water outlet, and does not need sterilizing devices.

The present invention provides treating and reusing process for ramie degumming waste water. The technological scheme includes the following steps: adding FeSO4íñ7H2O in the amount of 0.1-1 wt% of waste water into ramie degumming waste water and stirring for 1-30 min; adding H2O2 in the amount of 0.1-1 wt% and stirring for 1-60 min; adding lime in the amount of 0.2-1.5 wt% and stirring for 1-60 min; and depositing for 1-24 hr to obtain water for reuse in the production or mixing with other waste water to reduce pollutant concentration.

The invention belongs to a sewage treatment method in water treatment, and particularly relates to a method for producing regenerated water through the combined process of magnetic separation and purification-shallow medium filtration. Secondary effluent in a sewage treatment plant or water meeting the similar water quality standard is taken as raw water, and the raw water is subjected to magnetic separation and purification, disinfection and sand filtration and then is reused. Compared with the prior art, the method has the advantages that the magnetic disk separation technology can achieve the high-efficiency dephosphorization that cannot be achieved in the traditional advanced treatment process as well as the performance of heavy metal, the effluent effect reaches or is superior to that of the traditional advanced treatment process, and the reuse requirement of regenerated water can be met.

The invention provides a treatment method for the reuse of purified terephthalic acid (PTA) waste water, which belongs to the technical field of environment engineering and industrial waste water treatment. The particular method is as follows: polyacrylamide solution with mass concentration of between 1 and 2 thousandth is adopted for flocculate sedimentation pretreatment on the PTA waste water, the adding amount of the polyacrylamide solution is 1.5 to 1 percent of the volume of the waste water; the waste water after treatment enters an oxidation tank for advanced oxidation degradation reaction; in the reaction, a fan is used to blow air to a reaction tank; and the waste water after treatment can be directly used for production of workshop, wherein the concentration of the main oxidizing agent which is hydrogen peroxide is between 20 and 30 percent; auxiliary oxidants of sodium chlorate and potassium persulphate are industry graded; and the adding amount of sodium chlorate and potassium persulphate is 0.1 to 0.2 percent and 0.1 to 0.2 thousandth of the weight of the waste water respectively. Compared with the prior waste water reuse process, the method has the advantages of low investment, simple and convenient operation, high treatment efficiency and the like. The method realizes the reuse of the PTA waste water, relieves the pressure of insufficient water resources and meets the general policy of China on energy conservation and emission reduction.

Treatment method of disc type column membrane water, is the immediate processing of high concentration sewage to achieve the required emission standards, which selects processing options in series, parallel, primary or secondary treatment modalities according to the water quality and emission standards. The treatment method of disc type column membrane water is used in combination with other processes, as the final treatment step before discharge to ensure reliable standards of high concentrations of sewage treatment. The treatment device of disc type column membrane water can be connected in series or parallel alternately with flexible operation mode. Device can be designed to be connected in series or parallel operation mode according to the requirements, to achieve less volume of water and higher standards of water quality in series operation mode, and larger volume of water and lower emission standards in parallel operation mode, meeting the requirements of different water volume and water quality.

The invention provides an A2O2-MBR sewage treatment process. The A2O2-MBR sewage treatment process includes the following steps that firstly, sewage is input to an anaerobic tank, and phosphorous release and rapid ammoniation are finished in the anaerobic tank; secondly, water in the anaerobic tank is input to an anoxic tank, and nitrogen removal by denitrification is finished in the anoxic tank; thirdly, water in the anoxic tank is input to an aerobiotic tank, and degradation, denitrification and phosphorous absorption of BOD are finished in the aerobiotic tank; fourthly, water in the aerobiotic tank is input to a settling tank, and mud-water separation is finished in the settling tank; fifthly, supernatant liquor generated in the settling tank is input to an ozone preoxidation zone in an MBR reaction tank; sixthly, water in the ozone preoxidation zone in the MBR reaction tank is input to an MBR reaction zone in the MBR reaction tank. The invention further discloses an A2O2-MBR sewage treatment device. The A2O2-MBR sewage treatment process and device have the advantages that the flow is simplified, the occupied area is small, and the treatment effect is efficient and stable.

The invention discloses a separated-point inflow type Fenton reagent oxidation treatment device and a method for treating wastewater. The device comprises a wastewater storage tank, a first pH value adjusting tank, a fluidization column, a second pH value adjusting tank and a settling pond. The method comprises the following steps: adding sulfuric acid into the wastewater to adjust the pH value; adding a FeSO4 solution and an H2O2 solution; after oxidizing reaction, adding untreated wastewater, NaOH and a polyacrylamide solution to be uniformly stirred; and then discharging the settled wastewater with standard level by virtue of the settling pond. By using alkalinity of the untreated wastewater to replace H<+> in NaOH and water, the use level of the NaOH agent is reduced. Insoluble colloids and hydrophobic substances in the untreated wastewater can be removed in the Fe(OH)3 settling process, so that the utilization ratio of iron mud is improved.

The invention discloses a grating magnetic separation type sewage treatment apparatus. The apparatus comprises a magnetic separation cabinet, the middle portion of the magnetic separation cabinet is provided with a grating magnetic separation purifier, two sides of the magnetic separation cabinet are respectively provided with a water inlet and a water outlet, two sides of the grating magnetic separation purifier in the magnetic separation cabinet are respectively provided with a first perforated wall and a second perforated wall, an inlet water pool is formed between the first perforated wall and the water inlet of the magnetic separation cabinet, a purifying pool is formed between the first perforated wall and the second perforated wall, an outlet water pool is formed between the second perforated wall and the water outlet of the magnetic separation cabinet, and the inlet water pool, the purifying pool and the outlet water pool are sequentially communicated. The apparatus has the advantages of simple structure and convenient manufacturing, allows the speed of water flow in the grating magnetic separation purifier to be stably controlled through using the first perforated wall and the second perforated wall and cooperating with the purifying pool formed by the grating magnetic separation purifier, allows water to be effectively and comprehensively cleaned through the grating magnetic separation purifier, and ensures adaption to large sewage throughout.

The invention discloses a method for coagulation-ion exchange-coagulation circulating reflux treatment of secondary effluent and belongs to the technical field of water treatment. By virtue of the coagulation-ion exchange-coagulation treatment process, the water quality of the effluent can be effectively improved, the floc particle size and the sedimentation speed in a coagulation unit are increased, and the using amount of a coagulant is reduced; the service life of resin can be prolonged. The process is stable in operation, and by adopting the process, the fluctuations in the water quality can be effectively dealt, the amount of treatment water is increased, and the operation cost is reduced.

The invention provides a water filtering apparatus, which comprises a casing, the casing is formed by connection of a cover casing and a base, the top of the cover casing is provided with a water inlet, a water outlet is provided on the upper part of a sidewall of the cover casing, a central boss is provided on the base, a combined magnetic core is arranged on the central boss, the combined magnetic core comprises a top board, a supporting plate, a hollow column, fixed bolts and a plurality of permanent magnets sleeved on the hollow column, and the polarities of adjacent permanent magnets arereverse, the hollow column is placed between the top board and the supporting plate, the fixed bolts are screwed into the central screwed hole of the central boss on the base through a central aperture on the top board, the hollow column and a central aperture on the supporting plate of the combined magnetic core for integrally fixing the combined magnetic core on the base, filter screens placed between an inner end face of the cover casing and the base are provided around the combined magnetic core. According to the invention, a plurality of permanent magnets are employed to form a multipolar magnetic field which has a large adsorption area and strong adsorption capability to the ferromagnetism impurity, and because the area of the filter screen is large, the invention achieves the purpose that the water treatment amount is large and the filtering effect is good.

The invention discloses a method for efficiently treating black and odorous water bodies, and mainly aims at the problems of slow effect and high investment in existing black and odorous water bodies, and proposes a method for efficiently treating black and odorous water bodies with less investment and quick results. The method The method includes the following steps: taking out part of the black and smelly water, adding medicament to the taken out black and smelly water, controlling the uniform distribution of the medicament in the taken out black and smelly water to form drug-containing sewage; performing desliming treatment on the drug-containing sewage to remove the sewage in the black and smelly water mud to form deslimed clear water; aerate the deslimed clear water to form aerated clear water; release the aerated clear water into black and odorous water. The invention has the advantages of large amount of treated water, small occupied area and low investment cost.

The invention discloses a drum-shaped precision filter which comprises a rotary filter cartridge. The filter cartridge is a cartridge in the shape of a circular drum and is supported on a framework by a central support shaft, and bearings are arranged at two ends of the central support shaft; a water inlet is formed in an opening side of the filter cartridge, and sewage can flow into the filter cartridge; the filter cartridge can be driven by a driving device via a transmission mechanism to slowly rotate; a washing pipe is arranged on the outer side of the top of the filter cartridge, and a residue collecting hopper is arranged inside the filter cartridge and is positioned below the washing pipe. The drum-shaped precision filter has the advantages that stainless steel finished plates are punched to obtain support modules for individual filter units, and a filter screen is a stainless steel woven mesh and is good in corrosion resistance and impact resistance; the operating weight of the filter cartridge can be reduced to a great extent owing to intermediate support and intermediate transmission designs, the drum-shaped precision filter can bear long-term uninterrupted operating modes, the service life of equipment can be greatly prolonged, and the reliability of the equipment can be greatly improved; the filter cartridge is low in rotational speed, and accordingly the rotary bearings of the central support shaft are hardly abraded; good washing effects can be realized by the drum-shaped precision filter, and the drum-shaped precision filter is excellent in sewage treatment index.

The present invention discloses an advanced treatment and reuse technology of car wash wastewater. The technology comprises the following steps: S1. collecting wastewater to be treated, removing sludge by a grid, and removing oil by an inclined plate; S2. adjusting the pH of the wastewater subjected to sludge and oil removal; S3. performing micro-electrolysis treatment on wastewater after pH adjustment, and conveying the upper-layer wastewater to a unit for downstream treatment process; S4. adjusting the pH of wastewater treated in the step S3, discharging suspended solids and floating flocksin the wastewater to a sludge pool; S5. pumping supernatant wastewater treated in the step S4 to a cyclone filter system for further solid-liquid separation; and S6. enabling wastewater treated by a rotary filter to pass through multi-stage filtration systems such as a micro filtration system, an activated carbon adsorption system, an ultrafiltration system, and a nanofiltration system in sequence, and guaranteeing outgoing water to meet the drinking water standard. The technology has reasonable design and high practicability, can realize automation work, and is simple to operate and suitablefor promotion.

The invention relates to the field of wastewater treatment, in particular to a treatment method and treatment equipment for coking wastewater, which are used for removing COD (chemical oxygen demand) and chromaticity. The treatment equipment consists of a columnar reactor and magnetic separating equipment, the upper portion of the columnar reactor is a cylinder, the lower portion of the columnar reactor is a cone, one to five layers of stirring blades are arranged in the columnar reactor, and the magnetic separating equipment is arranged on the upper portion of the columnar reactor. The treatment method and the treatment equipment have the advantages that a treatment procedure is short, quantity of treated water is high, the equipment runs stably and reliably, and energy consumption and cost are low.

The invention belongs to the technical field of water treatment, mainly relates to a water purifying system, in particular to an efficient energy-saving water purifying system, and solves the problemthat water purifying systems are low in water yield and high in energy consumption in the prior art. The system comprises a primary filtering unit, a pressurizing unit, a high-pressure unit, a final filtering unit and a control unit, the primary filtering unit filters incoming water primarily to remove macrogranular substances in the water, the pressurizing unit guides water filtered by the primary filtering unit into a secondary filtering unit to filter heavy metal and chemical substances in the water, the high-pressure unit provides power support to the final filtering unit, and the final filtering unit utilizes reverse osmosis filtering for final filtering to obtain purified water. The efficient energy-saving water purifying system is stable in water flow, good in purifying effect and large in water treatment quantity.

The invention discloses a system and a method for treating slightly alkaline secondary effluent through magnetic ion exchange resin coupled catalytic ozonation circulating reflux, and the system comprises a high-density resin mixing tank, a resin sedimentation tank and a catalytic ozonation tank, wherein the high-density resin mixing tank is provided with a water inlet, a regenerated resin inlet, a mechanical stirrer, an oxidized effluent backflow water inlet, a regenerated or waste resin outlet, a resin backflow inlet and a resin sedimentation tank connector; the resin sedimentation tank is provided with a resin backflow outlet, a first inclined tube sedimentation plate and an overflow weir; the catalytic ozonation tank is provided with a resin-based catalyst, a baffle plate, an ozone generator, an aeration device, a water outlet, an oxidation reflux water outlet and a second inclined tube precipitation plate. The magnetic resin technology and catalytic ozonation are organically combined from the perspective of system design and operation, the treatment efficiency is improved, the service life of the resin is prolonged, the cost is saved, the waste magnetic resin is recycled, and the water treatment amount is increased.

The invention discloses a microfiltration machine with a backwashing device. The microfiltration machine comprises a filter screen support frame with a filter screen, and the backwashing device, the backwashing device comprises a backwashing water inlet pipe and at least two backwashing water outlet pipes, the water outlet of the backwashing water inlet pipe is communicated with the upper ends ofthe backwashing water outlet pipes, the lower ends of the backwashing water outlet pipes are distributed along the circumference of the filter screen support frame, the filter screen is vertically arranged, and a rotating mechanism capable of automatically rotating the lower ends of the backwashing water outlet pipes around the filter screen support frame is provided between the backwashing wateroutlet pipes and the backwashing water inlet pipe. The microfiltration machine with the backwashing device has the advantages of low control system requirements, good filtering effect, good backwashing effect, and no influences on normal running. The invention also discloses a microfiltration and precipitation integration machine.