88results about How to "Uniform water inflow" patented technology

Disclosed is a washing machine control panel base (2) with the function of automatically adding detergent, wherein at least one chamber (4) for adding solid detergent, at least one container (5) for holding liquid detergent, and an automatic detergent adding device (6) communicated with the chamber (4) and the container (5) are arranged in the control panel base (2); at least two detergent adding ports (7) are formed on an upper end face (21) of the control panel base (2), and the detergent adding ports (7) are in communication with the chamber (4) and the container (5) in a one-to-one corresponding mode; and an accommodation space (26) is arranged below the control panel base (2) and is formed by an outer circumferential wall (22), the upper end face (21) connected to the outer circumferential wall (22), and an inner circumferential wall (23) serving as a clothes adding port (24), with the chamber (4), the container (5) and the automatic detergent adding device (6) all being arranged in the accommodation space (26). According to the design, the internal space of the washing machine control panel base (2) is fully utilized, and the brand new arrangement is convenient for users; and the structure of the chamber (4) for adding solid detergent is integrally formed and is simple.

The invention relates to an assembled movable anti-flood wall. The assembled movable anti-flood wall comprises vertical columns and stop plates, the vertical columns include a middle vertical column and two-end vertical columns, each of the middle vertical column and the two-end vertical columns is provided with a through hole, two sidewalls of each of the middle vertical column and the two-end vertical columns are provided with insertion grooves, the inner sidewalls of the two-end vertical columns are provided with water inlet holes, the two sidewalls of the middle vertical column are provided with water inlet holes, the stop plates are provided with through holes, and two ends of each stop plate are inserted into the insertion grooves of the corresponding two adjacent vertical columns. The assembled movable anti-flood wall has the advantages that the assembled movable anti-flood wall is good in structural integrity by the aid of a trapezoid convex-concave structure splicing and inserting connection mode; when flood enters the multiple layers of stop plates from bottom to top layer by layer, the weight of the stop plates is increased by water weight, so that structural integral stability is improved greatly; the height of the lower stop plates is larger than that of the upper stop plates, and the joints between a base or an original dam and the base stop plates are provided with grooves and hermetic rubber water-stop strips, so that seepage-preventing and water-stopping effects are good; the anti-flood wall can be assembled and disassembled quite rapidly by means of socket type connection between the vertical columns and the base, so that working efficiency is improved greatly.

The invention discloses a process for treating manganese phosphate waste water, which combines independent pretreatment and continuous treatment on output solution. The inventive process comprises processing acidifying demulsifying pretreatment on the cleaning waste liquid of degreasing slot independently, and processing coagulation deposition pretreatment on the cleaning waste liquid of phosphating slot, then combining the pretreated degreasing waste liquid and phosphating waste liquid , with normal-overflow washing waste liquid and other surface cleaning waste liquid and cleaning waste liquid without pretreatment to enter into following treatment, wherein the following treatment comprises aeration integral adjustment, first deposition reaction, inclined plate deposition separation, second coagulation reaction, air-float separation, sand filtration, and active carbon adsorption. The invention can effectively resolve the problems of phosphating waste liquid as instable water quality and high fluctuation impact load, with simple operation, high reliability, low cost, and environment protection.

The invention discloses an enhanced nitrogen and phosphorus removal combined type artificial subsurface-flow wetland treatment system. The system comprises a sedimentation pool with a screen cloth, a front catchment buffer pool, a vertical flow artificial wetland, an advection artificial wetland system and a rear catchment buffer pool; algae and suspension pollutants in sewage are removed through the screen cloth, then, primary sedimentation of the sewage is completed inside the sedimentation pool, the sewage enters the front catchment buffer pool through an overflow weir, and then the sewage enters the vertical flow artificial wetland system through a water inlet, sufficient oxygen is provided for the vertical flow artificial wetland system through a micro-aeration device, then, the sewage enters the advection artificial wetland system after the adsorption effect of microorganisms, plants and matrixes, and the sewage is discharged into the rear catchment buffer pool after being treated by the advection artificial wetland system, and discharged out of the system through a water outlet pipe. According to the enhanced nitrogen and phosphorus removal combined type artificial subsurface-flow wetland treatment system, the nitrogen and phosphorus removal effect can be enhanced, and suspended particles, organic pollutants, heavy metal ions and other contaminants in sewage can be effectively removed.

The invention discloses a superhigh-efficiency anammox reactor, which is provided with a sediment zone, a reaction zone and a bracket. The sediment zone is sequentially provided with a first outer cylinder, an overflow weir, a water outlet, a backflow port, an annular wire netting and a two-stage three-phase separator from top to bottom. The two-stage three-phase separator comprises a first gas collecting tube, a first reducing pipe, a second gas collecting tube and a second reducing pipe. The overflow weir is communicated with the water outlet, the backflow port is positioned between the overflow weir and the annular wire netting, the inner ring of the annular wire netting is connected with the outer wall of the first gas collecting tube, and the outer ring of the annular wire netting is connected with the inner wall of the first cylinder. The reaction zone comprises a second outer cylinder, an iron powder carrier, a water inlet tube and a hemispheroid. The reaction zone is connected with the sediment zone through an outer cylinder increasing coupling and is directly connected with the bracket, and both the reaction zone and the sediment zone are provided with dredge pipes. The invention effectively prevents sludge loss, reduces gas disturbance, promotes the natural sedimentation of granules, reduces the toxicity of the base material and ensures the operating performance of the reactor to be efficient and stable.

The invention relates to a self-cleaning washing machine in the field of washing equipment, in particular to a flocculation container of the washing machine. The flocculation container comprises a flocculation barrel (3) and a flocculation barrel cover (1) which is buckled with an opening formed in the top of the flocculation barrel (3) in a combined mode. A water inlet (11), a water return opening (33), a sewage discharging outlet (32) and a putting inlet (13) are at least formed in the flocculation container; a water inlet structure is arranged on the flocculation barrel cover (1), and comprises an annular water channel (16), wherein spraying holes (15) which spray water to the inner wall of the flocculation barrel are formed in the bottom of the annular water channel (16), and the annular water channel (16) is communicated with the water inlet of the flocculation container. By the adoption of the flocculation container, the impact acting force applied by inlet water flow to flocculation in the flocculation barrel is reduced, and the phenomenon that the flocculation is dispersed is avoided; the purposes that the inner wall of the flocculation barrel is washed by the inlet water flow, and the flocculation container is cleaned through the inlet water flow are achieved.

The invention discloses a system and technology for reuse of printing and dyeing wastewater reclaimed water subjected to quality-based treatment. The process includes: (1) distributing conditioned printing and dyeing wastewater evenly in an oxygen-poor tank by a point-to-point water distributor, sending the oxygen-poor tank effluent water into a mud-film coupled oxygen-rich tank, conducting treatment, then sending the effluent water into a sedimentation tank to conduct sedimentation, then sending the sedimentation tank effluent water into a biological aerated filter to conduct treatment, and sending the effluent water into an intermediate water tank; and (2) subjecting one part of the water in the intermediate water tank to river water purifier and sodium ion exchange treatment, then reusing the water in flushing and color washing procedures of a printing and dyeing workshop; and subjecting the other part to sand filter filtration, ultrafiltration membrane filtration and reverse osmosis membrane filtration in order, and the reusing the water in the dyeing procedure of the printing and dyeing workshop. According to the invention, the printing and dyeing procedure is divided into a high quality water process and a low quality water process, and different water processes adopt different reclaimed water treatment technologies, thus bringing the technical characteristics of reclaimed water reuse into full play, saving energy consumption and improving the reuse rate of reclaimed water.

The invention discloses a sewage treatment device and a method of a SBR process. The device is provided with a reaction tank; an aeration head is arranged at the bottom of the reaction tank; and the aeration head communicates with a blower fan. The sewage treatment device is characterized in that an overflowing weir is arranged on the upper edge of the reaction tank; a central water distributor is vertically arranged in the middle of the reaction tank; the lower end of the water distributor communicates with a water inlet pump; a sludge discharge pipe communicating with a sludge discharge pump is arranged at the bottom of the reaction tank. The method which utilizes the device comprises the following steps: firstly, feeding water and draining the water; secondly, aerating; and thirdly, depositing and draining sludge. The sewage treatment device and the method are suitable for the sewage treatment of the SBR process, have the advantages of simple structure, and low manufacture and running cost, and can be completely built under the ground, thereby having no effect on buildings on the ground and no pollution to ambient environment.

The invention discloses a water-saving membrane component and a filter structure thereof. The water-saving membrane component comprises a center tube, a filter membrane component, an upper seal part and a lower seal part, and the filter membrane component is rolled centering on the center tube. The upper seal part seals the outer periphery of the upper end face of the filter membrane component to make the inner periphery, close to the center tube, of the upper end face, serve as a wastewater outlet. The lower seal part seals the inner periphery, close to the center tube, of the lower end face of the filter membrane component to make the outer periphery of the lower end face serve as a water inlet. Due to adoption of the water-saving membrane component, during filtering, raw water enters the outermost layer of the water-saving membrane component from the water inlet of the outer periphery of the lower end face and then spirally flows into the innermost layer of the water-saving membrane component from the outermost layer of the water-saving membrane component, pure water flows into the center tube, and waste water flows out from the wastewater outlet. The water-saving membrane component and the filter structure thereof have advantages of complete utilization of the filter membrane component, low loss, high pure water flux, less wastewater, uniformity in water feeding, long filter flow passage, effectiveness in filtration and the like.

The invention discloses an economical crop type filter bed-tidal flow artificial wetland combined sewage treatment system which is composed of two systems: an aquatic vegetable filter bed and a tidal flow undercurrent artificial wetland. According to the treatment system disclosed by the invention, a lot of granular pollutants are intercepted through a plant root system cushion layer in the aquatic vegetable filter bed and the pollutants are taken away from a water body along with plant residues when the plants are harvested, so that the problem of the follow-up blockage of the tidal flow artificial wetland can be effectively solved; the tidal flow artificial wetland operates by way of inflowing-detaining-draining-idling, and absorb oxygen in air into a wetland matrix by means of periodical changes of a saturated infiltrated surface of the bed body, so that the oxygen transmission amount in the wetland bed body is increased, the oxygen environment of the wetland is improved, and therefore, the removal effect of organic matters and ammonia nitrogen in the wetland is enhanced, and haycite and gravels in the wetland matrix have a relatively strong adsorption effect on phosphorus. The system is low in treatment cost, good in nitrogen and phosphorus removal effect, convenient to manage and operate and suitable for treating rural dispersed household sewage.

The invention relates to a distributor box of a washing machine and a water inlet method. The distributor box comprises a distributor box body and an upper cover of the distributor box, wherein the upper edge of the distributor box is provided with a slot, the slot and the distributor box body are integrally installed, an upper sealing cover is arranged above the slot and a plurality of water outlet structures communicated with the distributor box body are arranged on the upper sealing cover. The water can be entered on the distributor box body so as to dissolve washing powder thoroughly and prevent blocking; furthermore, the slot and the distributor box body are integrally arranged, therefore the distributor box is simple in structure; in addition, the water outlet structure is arranged on the upper sealing cover, therefore the distributor box is convenient to process, and the process can be realized simply; and a decorative cover plate arranged above the upper sealing cover can shield a water outlet structure, therefore a user can see smooth and beautiful upper end of the distributor box.

The invention provides a technology for efficient anaerobic treatment of aquaculture wastewater. The technology is characterized by including that the aquaculture wastewater enters a water distributing device from the bottom of an anaerobic reactor, and a granular sludge bed is used for biological anaerobic treatment; the treated wastewater enters a three-phase separator, separated pure liquid wastewater is drained from a water outlet channel of the reactor, and separated methane enters a gas-water separator and then is connected to a desulfurizer for desulfurization via a methane pipeline; separated granular sludge enters a sludge drain device at the bottom of the reactor and is drained to a sludge sump via a sludge drain pipe. The technology for efficient anaerobic treatment of the aquaculture wastewater has the advantages that hydraulic load of the reactor is increased, the sludge bed is thickened, mass transfer rates of microorganisms and the wastewater are increased, wastewater stopping and contact time is longer, and the water outflow quality is improved.

The invention discloses a washing machine control panel seat with built-in detergent release chambers. The washing machine control panel seat is characterized in that at least one solid detergent release chamber is arranged in a control panel seat, each chamber is provided with a detergent release opening which is formed in the upper end surface of the control panel seat, partition plates are arranged in the chambers, each partition plate is divided into an upper-layer space and a lower-layer space by the corresponding partition plate, vertically through water leaking openings are formed in the partition plates, the upper-layer spaces are provided with water inlet structures, and water spraying openings are formed in the lower-layer spaces. The chambers comprise box bodies and annular fastening covers, openings are formed in the upper portions of the box bodies, the annular fastening covers are fastened at the peripheral edges of the openings, the box bodies and the annular fastening covers are matched with one another at the peripheral edges of the openings to form water channels, water inlets are formed in the water channels, a plurality of water balancing through holes which are communicated with the upper-layer spaces are further formed in the inner side walls of the water channels, water guide plates are arranged in the water channels, and the water inlet structures are formed by the water balancing through holes and the water guide plates. The washing machine control panel seat has the advantages that internal spaces of the washing machine control panel seat can be sufficiently utilized, and the washing machine control panel seat in novel layout brings convenience for users during usage.

Disclosed is a water toxicity monitoring method based on anaerobic pretreatment and an air-cathode MFC. The method comprises judging whether an anode chamber is disturbed by dissolved oxygen according to the dissolved oxygen concentration of feed water of the anode chamber; if the disturbance exists, starting an ultrasonic deaerating plant to pre-treat the feed water, and leading the pre-treated feed water into an MFC reactor for a reaction after the pre-treated feed water is qualified through a test with a dissolved oxygen sensor; and after a water sample is subjected to pretreatment including filtration and sterilization, allowing the water sample to undergo physical anaerobic pretreatment and flow in a ''two-in-one'' air-cathode MFC reactor for test, and collecting an electrical signal output by the MFC for judging the biotoxicity of water. According to the method, the high electricity generation efficiency of a ''two-in-one'' air-cathode MFC provided with a single-chamber air cathode is developed, and through introduction of a deaerating process, the stability of the water biotoxicity early-warning and monitoring equipment is improved.

The invention discloses an automatic water distribution system for a siphon water tank. The automatic water distribution system for the siphon water tank comprises a siphon pipe, a siphon cover, a gas-guide pipe and a filtering cover, wherein the siphon pipe is of a U-shaped structure, one end of the siphon pipe is a water inlet end, the other end of the siphon pipe is bent and then connected with one T-shaped pipe, the vertical end of the T-shaped pipe is an overflow pipe higher than a high water level, and the horizontal end of the T-shaped pipe is a water outlet pipe; the siphon cover is a cylinder with an opening formed at the lower bottom, and the siphon cover is inverted at the water inlet end of the siphon pipe; the gas-guide pipe is of an inverted U-shaped structure with the two ends in different lengths, and the long end of the gas-guide pipe penetrates through the bottom of the siphon cover to be inserted into the water inlet end of the siphon pipe; the filtering cover of a grid structure covers the siphon cover outside; and supporting rods are arranged between the siphon pipe and the siphon cover. According to the invention, zero-energy-consumption automatic uniform water distribution is realized by adopting a siphon principle, uniform water inflow of a subsequent sewage soil adsorption bed can be realized by adopting the water charging system, energy is saved, and pollution control cost is reduced, so that the automatic water distribution system for the siphon water tank has a broad market prospect.

The invention relates to the field of sewage treatment, providing a sewage pretreatment tank. The sewage pretreatment tank comprises a sludge collecting device positioned at the lower part of a tank body, wherein the sludge collecting device is connected with a mobile sludge discharging device; the upper part of the sludge collecting device is communicated with a settlement oil separating region; a raw water inlet device and a water outlet end opposite to the raw water inlet device are arranged at two transverse ends of the settlement oil separating region; a water outlet device is arranged at the water outlet end; the settlement oil separating region comprises a water level adjusting device which forms an adjusting region at the upper part of the settlement oil separating region; a water seepage device is transversely arranged at the upper part of the adjusting region; the tank body is divided into sludge drying regions above the tank body by using the water seepage device; a filtering layer is attached to the upper part of the water seepage device; and an oil collecting device is arranged at the water outlet end of the settlement oil separating region. By using one tank body, multiple diversified functions of adjustment, settlement, oil separation, oil collection, filtering, sludge drying, and the like are achieved.

The invention discloses a water suction pump driven by an excavator and used in an emergency. According to the water suction pump driven by the excavator and used in the emergency, a main cavity (1-1) is arranged in a pump body (1), a water outlet (1-2) communicated with the main cavity (1-1) is arranged in the pump body (1), a water suction cavity (1-3) is arranged in the lower potion of the pump body (1), water inlets are formed in the bottom wall and circumferential walls of the water suction cavity (1-3), the upper end of the pump body (1) and a connection seat (3) are fixed through a support seat (2), a hydraulic motor (4) is arranged on the top portion of the connection seat (3), the output end of the hydraulic motor (4) stretches downwards into the connection seat (3) and is connected with the upper end of a pump main shaft (5), the lower end of the pump main shaft (5) penetrates through the connection seat (2) and stretches into the main cavity (1-1) of the pump body (1), and a screw blade (6) is arranged on the end portion of the lower end of the pump main shaft (5). The water suction pump driven by the excavator and used in the emergency can be used for water suction work in the emergency due to the fact that the water suction pump used in the emergency is driven by the excavator and requirements for rapidness and large water suction quantity in the emergency are met.

The invention provides high-speed solid-liquid separation equipment of a high-flow circulating granulation fluidized bed. An inner cylinder mud particle flow guide device is arranged at the open top end of an inner cylinder, so that mud particles flowing out of a granulation fluidization area can flow to a back-flow area; an outer cylinder mud particle flow guide device is arranged at the top endof a middle cylinder, so that mud particles flowing out of the granulation fluidization area flow to a sludge settling area. The circulating granulation fluidized bed equipment is suitable for the diameter of 4-20 m, due to the fact that the diameter of the circulating granulation fluidized bed equipment is greatly increased compared with that of previous fluidized bed equipment, the mud particleflow guide devices are additionally arranged at the top of the inner cylinder and the top of the middle cylinder, mud particles are prevented from being deposited in the circulating granulation area,and a particle circulating fluidization structure is designed between the inner cylinder and the middle cylinder. The mud particles formed in the fluidized bed inner cylinder are recycled between theinner cylinder and the middle cylinder, so that suspended solids are continuously supplemented in the inner cylinder, the growth and renewal of the mud particles in the inner cylinder are ensured, andthe problems that the suspended solids are insufficient in supply and the particles in a separation area cannot grow are solved.

The invention discloses a constructed wetland-microbial fuel cell coupled treatment device and treatment method for rural domestic sewage. The treatment device comprises a grid, an adjusting tank, a water pump, a water inlet pipe, a water collecting pipe, a water outlet pipe, a return pipe, a water outlet tank, a constructed wetland and a microbial fuel cell, wherein the grid, the adjusting tank,the water pump, the water inlet pipe and the constructed wetland are sequentially connected; the multi-electrode microbial fuel cell is arranged in the constructed wetland; the water collecting pipe of the constructed wetland leads to the water outlet tank; and the bottom of the water outlet tank is connected with the water outlet pipe and the return pipe. Domestic sewage firstly enters the adjusting tank through the grid, then enters the device from the water inlet pip via the water pump, undergoes treatment under the dual action of the constructed wetland and the microbial fuel cell, and then enters the water outlet tank via the water collecting pipe, and 50% of the sewage is discharged through the water outlet pipe while the other 50% of the sewage flows back through the return pipe; the hydraulic retention time of the sewage is 1.5-2.0 days; the concentration of dissolved oxygen in a cathode region is 1.0-1.5 mg / L; and the output current of the device is more than 0.96 mA. The constructed wetland-microbial fuel cell coupled treatment device provided by the invention is simple in structure, convenient to operate and capable of effectively treating rural domestic sewage.

The invention discloses an Augmentin strain enrichment expanding culture reactor. The main body of the reactor comprises a water distribution system, a reaction system, a isolation system and a liquid seal system from the bottom up, wherein the water distribution system comprises a water inlet pipe and a rotational flow water distributor; the reaction system comprises a main reaction zone and an auxiliary reaction zone; and the isolation system comprises a three-phase isolator and a sedimentation zone. The invention has the main advantages that (1) the unique rotational flow water distributorensures even water inflow; (2) caged floating ball stuffing is beneficial to retaining sludge and accelerating the start of the reactor; (3) a five-pipe baffle enhances the mass transfer effect and reduces the area of a dead zone; (4) sectional gas collection eliminates the gaskick phenomenon and promotes the sludge to be granulated; (5) a dual-efficiency three-phase isolator effectively isolatesgas, liquid and solid; and (6) two stages of reaction zones are connected in series, and thereby, matrix backmixing can be restrained and the treatment efficiency is improved.

The invention discloses a water inlet outlet pipe network system of efficient sewage land treatment process, comprising a water inlet pipe network and a water outlet pipe network; wherein the water inlet pipe network is arranged at one side of land treatment system and is composed of a water inlet pipe, a water inlet branch pipe and a water distributing pipe which are sequentially connected, the water outlet pipe network is arranged at the other side of the land treatment system and is composed of a water collector branch pipe, a water header and a drain pipe which are sequentially connected, the water distributing pipe comprises a plurality of water distributing vertical pipes which are vertically arranged and penetrates a biological filler and water collection layer and a water distribution layer, and the water outlet pipe is paved into the biological filler and water collection layer. The invention improves water distribution and water discharging modes, vertical water inflow is adopted, top transverse water discharging is adopted, thus improving volume utilization factor of system; less pipes are adopted, uniform water distribution and water discharging are realized, and investment is less; and construction is rapid and simple, and pipe damage ratio is low.

The invention discloses a device and method for treating high-fluorine-content water produced by an oil well and a coal-bed gas well. The device is characterized in that the high-fluorine-content water enters a primary fluoride removal device through a water pump A by an automatic pH control liquid adding machine and then simultaneously and equivalently flows into a secondary fluoride removal device A and a secondary fluoride removal device B, namely the two secondary fluoride removal devices are connected in parallel to run; when the content of fluorine in effluent does not reach the standards, the primary fluoride removal device, the secondary fluoride removal device A and the secondary fluoride removal device B are connected in series to run; when the content of the fluorine in the effluent still does not reach the standards, an alumina activation and regeneration unit and the primary fluoride removal device form a circulation loop to regenerate a fluoride removal filler, and meanwhile, the two secondary fluoride removal devices are regenerated; the high-fluorine-content water is discharged after reaching the standards. According to the device and the method disclosed by the invention, two adsorbents, namely activated aluminum oxide and a carbon ceramic composite material are combined during the use, advantages are enhanced, and disadvantages are avoided, so that the fluorine removal effect is effectively improved; the device is simple in structure, automatic in running and convenient to maintain and manage and reduces the running cost.

The invention discloses a spray dedusting type centrifugation blower fan, and a centrifugal type water mixing dedusting system, and belongs to the field of dedusting equipment. The spray dedusting type centrifugation blower fan comprises a blower fan housing; the upper end of the blower fan housing is provided with an air inlet, and one side of the blower fan housing is provided with an air outlet; a blower fan impeller is arranged in the blower fan housing; the bottom end of the blower fan housing is connected with a rotary motor used for diving the blower fan impeller; a sealing device is arranged between an output shaft terminal of the rotary motor and the blower fan housing; the air inlet of the blower fan housing is connected with an air inlet pipe; a wind inlet opening of the air inlet pipe is arranged to be vertically upward; the air inlet pipe is provided with a spray water inlet pipe communicated with an internal cavity of the air inlet pipe; spray water is sprayed into the air inlet pipe through the spray water inlet pipe, is subjected to pre-mixing with dust-containing gas introduced into the air inlet pipe, and an obtained mixture is introduced into the blower fan housing, the mixture is subjected to full centrifugation stirring in the blower fan housing using the blower fan impeller, and is discharged through the air outlet. The dust-containing gas and the spray water are subjected to pre-mixing, and blower fan stirring centrifugation mixing, so that full mixing of the spray water with dust in the gas is realized, and dedusting effect is improved effectively.

The invention provides a milk cow and live pig culturing farm manure low-cost high-efficiency fermentation processing system. The milk cow and live pig culturing farm manure low-cost high-efficiency fermentation processing system comprises a primary anaerobic pond and a secondary anaerobic pond; the primary anaerobic pond comprises a pond body a, gas storage black membrane, impermeable membrane, aheating coil pipe, and a water distributing system; the water distributing system is arranged on the upper part of the bottom of the pond body a, and is composed of pipelines; the pipelines are provided with water spraying nozzles; the pipelines are combined, and are connected with a water inlet pump; stainless steel wires are fixedly arranged on the upper part of the pond body a; biological filling material strips are fixedly arranged on the stainless steel wires; the heating coil pipe is arranged to be close to the pond wall; the secondary anaerobic pond comprises a pond body b, gas storageblack membrane, and impermeable membrane. The milk cow and live pig culturing farm manure low-cost high-efficiency fermentation processing system is beneficial for uniform mixing of sewage, is capable of ensuring the temperature needed by fermentation, is capable of realizing full contact of biological filling material with sewage, is provided with the secondary anaerobic pond, so that sewage fermentation efficiency is increased, and complete sewage fermentation is realized.

The invention discloses a novel small gas-water backwashing filtration tank, which comprises a tank body, wherein the tank body can be divided into 2-6 filtration grids, a filtration area of each filtration grid is not more than 30 m<2>, and the filtration grid is provided with a water inlet area, a filtration area, and a water and gas distribution area. According to the present invention, with an optimal design of a filtration head, filtration head clogging can be effectively prevented, and a rebuilding period of the filtration tank can be substantially prolonged, wherein the rebuilding period can be more than five years; with optimal designs of various positions of the tank body, a backwashing effect can be increased, energy saving and consumption reduction can be provided, and filtration material loss can be effectively prevented; the special water inlet distribution groove, a weir plate and a V-shaped groove of a V-shaped filtration tank are eliminated, and untreated water is assigned to various filtration grids only by adopting a water inlet total pipe and a water inlet branch pipe combination manner, such that the requirement of uniform water entering can be basically achieved, and a tank body structure is simplified; and backwashing water is uniformly distributed through the water and gas distribution area on the bottom of the tank, and backwashing gas is uniformly distributed through gas distribution manifolds outside the tank, such that the tank body structure is further simplified, an occupation area is reduced, and a cost is reduced.

The invention provides a preparation method of a multi-central-tube hollow fiber membrane module, which comprises the following steps: oppositely arranging two filament separation rings, and correspondingly embedding the two ends of a central tube into fixing sleeves at the corresponding positions of the filament separation rings respectively; arranging the membrane filaments into bundles according to the distance between the adjacent fin plates, and respectively embedding the two ends of a single bundle of membrane filaments between the adjacent fin plates of the filament dividing rings at the two ends until the membrane filaments are uniformly mounted between all the fin plates, so as to obtain a central tube assembly; integrally embedding the central pipe assembly into the membrane shell, fixedly mounting the wire dividing rings at the openings in the two ends of the membrane shell, cut-trimming the ends of membrane wires, then pre-blocking the openings of the membrane wires; and finally, performing sealing and pouring on the openings in the ends of the assembly, and after a pouring layer is hardened, cutting the ends to be level to remove the pre-plugged holes, thus manufacturing the multi-central-tube hollow fiber membrane module. By adopting the method, the installation difficulty of the membrane filaments can be greatly reduced, the preparation efficiency is improved, and the method has a good application prospect.