75results about How to "Stable water quality" patented technology

The invention relates to a method and equipment for the oil-water separation and wastewater purification and treatment of kitchen wastes. The method and the equipment can carry out field collection or wastewater purification and standarization treatment on the kitchen wastes swill or domestic wastewater in the fields of a restaurant, a hotel, a department, a house, milk plant, a food products factory, a brewery, a hospital, a beverage plant, a slaughterhouse, a chemical plant and the like, separates the swill into drainage oil and kitchen wastewater, continuously carries out fast and continuous purification treatment on the domestic wastewater anytime and anywhere and ensures that the quality of purified water achieves the nationally specified (GB18918-2002) emission standard of a town sewage processing plant. The heating and temperature-regulating type wastewater purification treating equipment disclosed by the invention has the advantages of small occupied area, high wastewater purification starderization speed, low wastewater treating equipment investment, low wastewater treatment cost, and the like. The method and the equipment which are disclosed by the invention have the advantages of good industrial practicability, novelty and creativity.

The invention relates to water treatment compound coagulant and a compound flocculation method thereof. The compositions and the content of the water treatment compound coagulant are: 1 to 3 shares of PAFC, 1 to 6 shares of FeCl3, and 0 to 0.3 milligrams of HCA per liter of water. The compound flocculation method of the water treatment compound coagulant follows the following steps: under quickly stirring in 150 to 300 revolutions per minute, 1) firstly the inorganic macromolecule coagulant PAFC is added; 2) after 5 seconds to 20 seconds, and then the organic coagulant FeCl3 is added; 3) after continuously quick stirring for 30 seconds to 60 seconds, and then cation macromolecule coagulant aid HCA is added; and 4) after still quick stirring for 60 seconds to 90 seconds, and then slowly stirring in 30 to 50 revolutions per minute, and stopping after 10 to 20 minutes to settle the flocculation. The compound enhanced flocculation proposal of the invention not only solves the problem of the former traditional technology that water has large chrominance and high residue turbidity after adding iron salt, but also improves the defects of light alum and slow settling after singly adding PAFC.

A preparation method of plasma-grafted polyvinylidene fluoride resin nanofiltration membrane comprises the steps of oiling nano inorganic particles; blending the treated inorganic particles with polyvinylidene fluoride resin powder and an additive in a mixing unit, extruding the mixture to a spinneret plate through a twin-screw extruder at high temperature, and spinning to obtain hollow fiber membrane; extracting the hollow fiber membrane, washing with an alkali to form micro-nano hollow fiber membrane base material; pouring glycosylallylamide and acrylic acid into absolute ethyl alcohol, stirring well to form coating liquid; washing the hollow fiber membrane base material, drying, soaking in the coating liquid for certain time, taking out and air-drying, exposing the hollow fiber membrane base material to plasma to obtain the resin nanofiltration membrane covered with surface high-hydrophilic micro coating. The nano-filtration membrane has the advantages of high strength, high throughput, good acid and alkali tolerance, permanent hydrophilicity and the like.

The invention provides a wastewater treatment technology beneficial to removing black and odorous water.The technology sequentially comprises the following steps of collecting basin treatment, coagulation and air floatation treatment, bio-contact oxidation treatment and constructed wetland treatment.The technology is easy to operate and good in water drainage effect, and produces no odor in the treatment process.The invention further provides a wastewater treatment device beneficial to removing black and odorous water.The device sequentially comprises a collecting basin, a coagulation and air floatation basin, a bio-contact oxidation treatment basin and a constructed wetland treatment system.The device is simple in structure, convenient to maintain and good in wastewater treatment effect.

This invention provides a small hand-pressing instant sterilization cleaner including an original water tank, a filter core, a mid-water tank, a manual booster, a sterilization device and a cleaner outlet characterizing that said manual booster and the sterilization device are set on the pipe between the mid-tank and the cleaner outlet.

The present invention utilizes a certain fixation measure to fix microorganism on the carrier which is modified foamed plastics, and makes the load quantity of microorganism be up to 18-56 g / L, so that the treatment speed and treatment effect of treating sewage by using microorganism are raised. Its main technological parameters are: maximum BODS volume load is 28 kg BOD5 / cu.m.d, and maximum NH(+)4-Nvolume load is 3.6 Kg NH(+)4-N / cu.m.d. Said invention not only is suitable for treating urban sewage, industrial sewage, but also can be used for treating river environment sewage.

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 zero-energy-consumption sewage treatment system and method for constructed wetlands. The system consists of a sewage pre-treatment system, an automatic siphon system, a constructed wetland purification system and a water collection system, wherein the sewage pre-treatment system comprises a three-squared septic-tank and a sewage siphon pool which is connected with the three-squared septic-tank through a pipeline; the automatic siphon system is arranged in the sewage siphon pool; the constructed wetland purification system is connected with the automatic siphon system; the water collection system is connected with the constructed wetland purification system through a pipeline; the constructed wetland purification system is an ecological system consisting of a substrate layer, plants, microorganisms and a water body and sequentially comprises a root layer, a water distribution layer, a substrate layer, a water collection layer and an anti-seepage layer from top to bottom. The system combines sewage treatment and wetland plants, automatically runs by virtue of the gravity generated by liquid level difference, is stable and reliable in treatment process, low in running cost and strong in nitrogen and phosphorus removing capability, facilitates breathing exchange of underground air, has a good treatment effect, and does not have sludge discharge.

The invention discloses a high efficiency ion exchange electroplating wastewater reuse treatment system, which comprises a comprehensive wastewater adjustment pool, a quartz sand filter, a bag filter, an ultrafilter, an ultrafiltration water production tank, an activated carbon filter, a first fine filter, a cation exchanger group, an anion exchange group, a second fine filter, a reuse water pool and a constant pressure reuse water pump. The cation exchanger group is in connection with a cation exchange regeneration system, and the anion exchange group is in connection with an anion exchange regeneration system. The wastewater reuse treatment system disclosed in the invention has the advantages that: the wastewater reuse rate is high; it can operate for 24g ceaselessly; the system combines three anion exchangers and three cation exchangers and adopts a use mode of two for use and one for standby use so as to make each barrel resin exchanged thoroughly, thus achieving energy saving and high efficiency use; and the discharged water has stable quality, and the mode of two for use and one for standby use employs a tandem operation way to achieve the characteristics of stable treated water quality and good water quality, etc. The invention completely solves the problems of low reuse rate of comprehensive wastewater, discontinuous operation, and poor reuse water quality.

The invention discloses an application of a membrane bioreactor based on a stainless steel fine filtering device in sewage treatment. A conventional membrane bioreactor (MBR) is improved in a manner that organic membrane, non-woven fabric, ceramic membrane and membranes in other materials are replaced by a high-accuracy stainless steel filter screen. The hole diameter of the stainless steel filter screen can be ranged from 1 Mum to 10 Mum. The stainless steel filter screen can be processed into a filtering assembly in the shape of a panel, a tube, a folding tube or others. Combined with an assembly rack, a water outlet hole and a collecting pipe, the stainless steel filter screen is used in a bioreactor, forming a novel sewage treatment device. The invention completely solves the problem of the conventional MBR brought by membrane pollution and low membrane flux, bringing a broader prospect to the application of the MBR in sewage treatment.

An advanced treatment recovery technology of coking wastewater comprises the steps of sequentially implemented air floatation oil removal pretreatment, acidifying treatment, denitrification treatment and biodegradation treatment, and also comprises the following steps: 1, processing biodegraded wastewater by using an inorganic membrane filtering device, reusing parts of the obtained membrane filtrate as mineral separation process water, and allowing the residual membrane filtrate to enter a pollution resistant reverse osmosis membrane device to carry out desalination treatment; and 2, pumping the membrane filtrate obtained in step 1 into the pollution resistant reverse osmosis membrane device to carry out desalination treatment in order to remove COD, NH3-N and inorganic salts in water, and directly reusing the obtained membrane permeation liquid as circulating cooling water. The technology adopting an inorganic membrane to carry out the reverse osmosis pretreatment can solve the problems of no pollution resistance and unlikely dirt obstruction of an ultrafilter membrane, and no flocculating agent or a small amount of the flocculating agent is added by adopting inorganic membrane feeding, so the reverse osmosis pollution degree is reduced, thereby the cleaning period of the RO (reverse osmosis) membrane is prolonged, the cleaning effect is good, and the irreversible dirt obstruction of the RO membrane is avoided.

Provided are an ultrapure water production apparatus and ultrapure water production method in an ultrapure water production process configured so that concentrate from a first RO membrane device is processed in a second RO membrane device and permeate is collected. The apparatus and method are advantageous in terms of cost and the decarbonation device for preventing concentration of inorganic carbonic acid in the system is small and space-conserving. The present invention is an ultrapure water production apparatus equipped with: a first RO membrane device (3) for RO membrane treatment of water to be treated; an introduction line (13) for introducing the water to be treated to the first RO membrane device (3); an outflow line (14) for causing permeate from the first RO membrane device (3) to flow out; a second RO membrane device (5) for RO membrane treatment of the concentrate from the first RO membrane device (3); and return lines (19, 20) for returning permeate from the second RO membrane device (5) to the introduction line (13). A decarbonation device (6) for decarbonation of the permeate from the second RO membrane device (5) is provided in the return line.

The invention relates to a multi-component all-acid fixed bed hydrogen peroxide production process which comprises the following steps: (1) in a hydrogenation tower, carrying out hydrogenation reaction on raw material hydrogen and a carrier anthraquinone under the action of a palladium-gold catalyst to generate a hydroanthraquinone hydrogenation solution; (2) adding phosphoric acid into the hydroanthraquinone hydrogenation solution to adjust the pH value to 3.5 + / -0.2, and reacting with oxygen in the air to obtain an oxidation liquid; and (3) taking pure water as an extraction agent, carryingout countercurrent extraction in an extraction tower to obtain an extraction solution containing hydrogen peroxide, and then purifying with heavy aromatics in a purification tower to obtain a qualified hydrogen peroxide product. According to the production process, a full-acid fixed bed process technology is adopted, balanced regeneration of a working solution system is optimally controlled, partial aluminum peroxide adsorption regeneration is adopted, dust entrainment is reduced, meanwhile, the filtering precision is improved, dust and salt entrainment in a product is greatly reduced, and indexes such as free acid, organic carbon and non-volatile matter are far away; and the product purity is superior to the national standard and companies.

The invention relates to a method for preparing chlorine dioxide which is used for treating water, in particular to a method for preparing the chlorine dioxide used for treating the water from stable activating preparation of the chlorine dioxide. Sodium carbonate is adopted as a stabilizer to prepare stable chlorine dioxide solution, and hydrochloric acid is used as activation solution of an activator to actively prepare the chlorine dioxide. The invention is characterized in that: the weight concentration of the hydrochloric acid in the activation solution is 10 percent-20 percent and the mass putting ratio between the chlorine dioxide activation solution and the stable solution is 1: 3-1: 1. The method of the invention adopts stable chorine dioxide activation equipment with finalized production and gropes and selects suitable activation concentration and use ratio; the activation efficiency can be improved above 85 percent; the invention can effectively reduce the cost of water treatment and improve water quality of the water treatment.

The invention discloses a system and method for treating sewage at zero energy consumption by using an ecological filter bed. The system comprises a sewage pipe, a gravity water distribution system, the ecological filter bed and a water collecting system, wherein the sewage pipe is connected with the gravity water distribution system, the gravity water distribution system is arranged at the upper part of the ecological filter bed, and the water collecting system is arranged at the bottom of the ecological filter bed; the gravity water distribution system comprises a water inlet pipe, a water distribution pad, a water distributor and a supporting seat, wherein the section of the water distributor is inverted triangular, the inside of the water distributor is divided into two grids by using a partition plate, the water distributor is arranged on the supporting seat and can be freely turned towards two sides, the water inlet pipe is connected with the sewage pipe, and the other end of the water inlet pipe is arranged above the water distributor; and the ecological filter bed is composed of multistage infiltration layers sequentially including an impermeable layer, a water collecting layer, a composite infiltration layer, a biological treatment layer and a water distribution layer from bottom to top. The system is uniform in water distribution, strong in nitrogen and phosphorus removal capacity and good in water treatment quality, has the advantages of small floor area, simplicity in management and low operation cost and can realize sludge-free discharge.

The invention discloses a sewage and sludge processing system. A cloth filter is connected with an ultraviolet disinfection tank; a coarse screen, an influent pump station, an aerated grit chamber, a fine screen, a photochemical pool, an anaerobic tank, a anoxic tank, an MBBR biological reaction tank, a secondary sedimentation tank, a two-stage pumping station, a coagulative sedimentation tank, the cloth filter, a disinfection oxidation pond and a clear-water reservoir are connected successively; the clear-water reservoir is connected with a suction well and an efflux pump station successively; the photochemical pool is connected with the MBBR biological reaction tank; the secondary sedimentation tank is connected with the photochemical pool and then connected with pipelines behind the photochemical pool; the MBBR biological reaction tank is connected with the disinfection oxidation pond; the coagulative sedimentation tank is connected with a sludge concentration tank, a sludge homogeneous tank, a sludge dewatering machine and a sludge filter press in order; the secondary sedimentation tank is connected with a pre-concentration tank; the pre-concentration tank is connected with a sludge concentration machine, a digestion tank and a post-concentration tank in order; and at the same time, the pre-concentration tank and the post-concentration tank are connected with a sludge conditioning tank. With the sewage and sludge processing system, the sewage processing quality is improved; and regression of an ecological system is achieved.

The invention provides a cellulose compound water-treatment flocculant and an application method thereof, and relates to a water treatment technology. The water-treatment flocculant is prepared from the following components in parts by mass: 1 to 5 parts of cellulose and 1 to 3 parts of a coagulant, wherein the flocculant is selected from aluminum sulfate, ferric chloride or aluminium polychlorid and the like. The application method comprises the following steps: firstly, adding the flocculant into water and stirring for 30 to 60 seconds under a revolving speed of 300r / min to 500r / min (Revolutions Per Minute); then adding the cellulose and further stirring for 1 minute at the revolving speed of 200r / min to 300r / min; further stirring for 5 minutes at the revolving speed of 100r / min to 200r / min; finally, stirring for 10 minutes at the revolving speed of 50r / min to 100r / min; standing for sedimentation for 15 to 20 minutes after the stopping of stirring. According to the method, the adding amount of the conventional flocculant is reduced; the sedimentation performance of the flocculant body is improved; the treatment cost is lowered; the standing time of a sedimentation basin is shortened; the occupation area of the sedimentation basin is reduced and the like. The cellulose can also be used for removing partial soluble pollutants.

The invention relates to the technical field of filters for water quality purification treatment, and particularly relates to a vortex filter. The vortex filter comprises a filter body. The vortex filter is characterized in that a supporting layer, a lower quartz sand layer and an upper quartz sand layer are arranged at the bottom in the filter body sequentially from bottom to top; the upper part of the upper quartz sand layer is provided with a stirring tooth rake which is installed on a central drive shaft; the upper end of the central drive shaft extends out of the top of the filter body and is connected with an output shaft of a speed reducer; the lower part of the supporting layer is provided with a filtering plate which is provided with a filtering head; the bottom of the filter body is also provided with a back flushing water intake pipe and a first manhole; the side wall of the filter body is provided with a back flushing water drainage pipe, a water intake pipe, a pre-flushing pipe and a second manhole; the upper part of the filter body is provided with a gas exhaust pipe and a third manhole. According to the filter, the back flushing wastewater generation quantity and the back flushing time are shorted by 30%; the service life of a filter material is prolonged; the vortex filter is good in stability.

The invention relates to a portable drinking water purifying apparatus and a use method thereof, and belongs to the field of drinking water treatment. Tap water is poured into the above treatment apparatus and automatically flows into a filter unit to adsorb organic matters and remaining chlorine and to realize ion exchange resin adsorption of heavy metals and parts of salts, and obtained tap water enters an electro-adsorption unit to further purify heavy metals, perchlorate radicals and nitrate radicals in order to obtain purified water; and the filter speed of a filter core is fast, and the heavy metals and the salts are mainly removed through electro-adsorption, so the use period of the filter core is far longer than that of a traditional pitcher, and a lithium battery is used to drive electro-adsorption salt removal in order to realize desorption reuse, thereby the cost is low. Compared with present reverse osmosis water purifiers, the portable drinking water purifying apparatus adopting the method in the invention has the advantages of extremely low apparatus investment, portability and extremely low cost; and compared with present pitchers, the apparatus adopting the method in the invention has the advantages of low treatment cost, long service life of the filter core, and good quality of treated water.

The invention relates to a method for controlling moss in a penaeus japonicas higher-place pond. The method comprises the following steps: (1) when mosses are found on pond walls of a higher-place pond in an intensive culture process, reducing water level of the higher-place pond, to make 30% to 35% mosses expose out of water; (2) fixing and paving black plastic films along the peripheral pond walls of the higher-place pond; (3) after that, putting amino acid fertilizer water paste in the water of the higher-place pond to make water rich every other 3-5 days; (4) after 7-10 d, after the mosses on the pond walls almost die, putting away the black plastic films on the pond walls; (5) filling water in the higher-place pond, and water level recovering to initial height, then putting aquaculture probiotics into the pond every other 3-5 days, to make water transparency of the water reach 30-40 cm, and pH value being stabilized between 7.8 and 8.2. The method is simple and easy to operate, and is environmentally friendly and economical, and effectively controls mosses by the method of removing the mosses in an earlier stage and restricting the mosses in the later stage. The method provides a stable ecological system for pond culture of penaeus japonicas in the higher-place pond, and thoroughly eliminates the mosses and controls growth of the mosses.

The invention relates to a biological rotating disc. The biological rotating disc comprises a contact reaction tank, a rotating shaft and a plurality of microporous disc sheets, wherein the two ends of the rotating shaft are separately rotatably arranged on a first end face and a second end face, which are opposite, of the contact reaction tank, the microporous disc sheets are sequentially fixed to the rotating shaft along a length direction of the rotating shaft and are of radiating arrangement in a cross section direction of the rotating shaft, disc faces of the microporous disc sheets are all arranged parallel to the rotating shaft, and the rotating shaft is connected with a driving device. According to the biological rotating disc disclosed by the invention, microbes and activated sludge are high in adhesive power, the microbes and the activated sludge in the disc are high in growth quality, and the sewage treatment efficiency is high.

The invention discloses a city sewage treatment apparatus. The city sewage treatment apparatus comprises a filtering casing and a biological treatment apparatus, the filtering casing comprises a fixedrack body, a fixed case and a filtering assembly, the filtering assembly is positioned in the fixed case, the filtering assembly comprises a filter cylinder, a filtering rotating hopper, and a rotating mechanism, a filter sieve is arranged in the filter cylinder, filter tank apertures are uniformly distributed at a side wall of the filtering rotating hopper, the bottom of the filtering rotating hopper is fixedly connected with the rotating mechanism, the biological treatment apparatus comprises a distributive pipe, a biological treatment pipe group, a water collecting pipe, and a support frame, and a water outlet hopper is arranged at the bottom of the water collecting pipe. A treatment method comprises the following steps: A) area division; B) sampling for detection; C) apparatus installation; and D) sewage processing. The city sewage treatment plant apparatus and the method have the advantages that the treatment method is ingenious and reasonable, and has regional and targeted treatment on riverway, targeted treatment can be carried out on pathogen types in the sewage in the different areas, and processing water quality of the sewage can be effectively increased.

The present invention provided an apparatus for treating wastewater wherein an excess sludge separated by a settling separation tank can be surely recovered by a simple structure, and deterioration of treated water quality can be prevented. The apparatus for treating wastewater is equipped with a solid and liquid separator wherein wastewater containing garbage crushed by a disposer is separated into a solid content and liquid content; an apparatus for making compost for treating the solid content separated by the solid and liquid separator; a wastewater treating tank for treating the liquid content separated by the solid and liquid separator; a settling separation tank for settling and separating a sludge content contained in treated water from a wastewater treating tank; and a transfer means for transferring the sludge settled in the settling separation tank to the apparatus for making compost.

The invention relates to a rare earth molten salt electrolysis fluorine-containing wastewater treatment method, which adopts continuous operation of 'double calcium method + coagulation + flocculation + precipitation ', and can control the fluorine ion concentration of high-concentration fluorine-containing wastewater to be below 8mg / L. According to the method, on one hand, the problem of easy pipe blockage in industrial production is thoroughly solved, and continuous long-time operation can be realized; and on the other hand, the fluorine ion removal efficiency is further improved, and the treatment cost is reduced. The method has the advantages of simple process flow, high defluorination efficiency, low treatment cost and easiness in sludge sedimentation, and is particularly suitable for industrial production.

The invention relates to a high-density fish-and-vegetable symbiosis system which comprises a sewage tank, a support, a drainage main pipe, a fish tank, a cultivation tank, a sewage pump, a circulation pipeline, a water distributor, a cultivation tank water inlet pipe, a sewage pipe water outlet pipe, a clear water drainage pipe, a water distributor water inlet pipe, a central outer pipe and a central inner pipe. The fish tank is composed of an upper cylinder and a lower inverted cone. The center of the bottom of the inverted cone is provided with a groove, the central outer pipe is mounted inthe groove, the central inner pipe is mounted in the central outer pipe and passes through the bottom of the fish tank and is connected with the drainage main pipe at the bottom of the fish tank, thedrainage main pipe is connected with a sewage drain pipe and a clear water drain pipe respectively through a three-way valve, the sewage drain pipe is disposed above the sewage tank, the pipe wall ofthe central outer pipe is provided with a plurality of holes, the holes are covered with a grid, and the height of the central inner pipe is lower than that of the central outer pipe. The system is simple, convenient to operate and low in running and maintenance cost, the quality of treated water is good, the breeding density is large, and the planting yield is high.

The invention discloses a water supplier for a firecracker paper roll, comprising a machine frame with a box-type structure, wherein the machine frame consists of sidewall panels, a small beam, upper side beams, a top plate and lower side beams; an upper layer conveying mechanism and a lower layer conveying mechanism are mounted in the box-type structure; the upper layer conveying mechanism is mounted between the two upper side beams; the lower layer conveying mechanism is mounted between the two lower side beams; the upper layer conveying mechanism and the lower layer conveying mechanism are connected with a power and speed change mechanism, during operation, the movement direction of the upper layer conveying mechanism is opposite to the movement direction of the lower layer conveying mechanism; an edge folding mechanism is mounted at the end part of the upper layer conveying mechanism in the moving direction; high pressure nozzles are arranged above the upper and lower layer conveying mechanisms, the high pressure nozzles are connected with a booster pump through a pipeline, and the booster pump is connected with a water source through a pipeline. The residual water after the firecracker paper roll water supply can be recycled. With the adoption of the water supplier for the firecracker paper roll, the labor intensity is reduced, the production efficiency is improved, the product quality is improved, and the water is saved.

The invention relates to a boiler blowdown water recycling treatment technology based on ion exchange and chemical precipitation. The technology comprises the following steps that boiler blowdown water is filtered by an efficient fiber filter, so that the turbidity of the filtered and purified blowdown water is decreased to be smaller than 1 NTU, and an SDI value of the filtered and purified blowdown water is smaller than 3; the filtered and purified blowdown water is delivered to an ion exchanger, effluent water exchanged by anion exchange resin enters a boiler raw water tank, and after the anion exchange resin is saturated, regenerating is conducted by adopting a regenerating agent, so that an exchange function of the anion exchange resin is recovered; coagulation treatment and flocculent precipitation treatment are conducted on regenerated waste liquid and backwashing waste liquid of the ion exchanger by adopting a coagulant and a flocculant. Compared with the prior art, the high-concentration waste liquid or regenerated liquid achieves solid-liquid separation by adding a small quantity of the coagulant and a coagulant aid through the coagulation effect and the flocculent precipitation effect while high-quality recycling on the boiler blowdown water is achieved through ion exchange, removal of phosphate in the boiler blowdown water is completed, and zero discharge of the boiler blowdown water is achieved.

The invention discloses a domestic sewage biological treatment method, belongs to the technical field of sewage treatment, and solves the problems of environmental pollution, incapability of recyclingand the like in the prior art. The method comprises the steps of pretreatment, water volume adjustment, denitrification treatment, biochemical treatment, precipitation treatment, disinfection treatment and the like. The method has the advantages that the removal efficiency of pollutants is high, the nitrification capability is strong, nitrification and denitrification can be performed simultaneously, the denitrification effect is good, the effluent quality is stable, the residual sludge yield is low, the equipment is compact, the operation is simple, and the like. The quality and the volume load of the treated effluent are greatly improved, the effluent can reach the standard of miscellaneous water, and the treated effluent can reach the standard of landscape water after subsequent treatment. The method can be widely applied to biological treatment and recycling of domestic sewage and various biochemical industrial wastewater.

The invention discloses a horizontal MBR membrane sanitary sewage processor, which comprises a box body, a hydrolysis acidification pool, an anaerobic tank, an aerobic tank and an MBR membrane pool, wherein water inlets and water outlets are respectively formed in the upper sides of the left side and the right side of the box body; the water inlets are connected with the hydrolysis acidification pool; the anaerobic tank, the aerobic tank and the MBR membrane pool are sequentially arranged on the right side of the hydrolysis acidification pool; the MBR membrane pool is horizontally and transversely arranged and is vertical to the aerobic tank; manholes are formed above the hydrolysis acidification pool, the anaerobic tank and the aerobic tank; an upper-side MBR membrane assembly is arranged in the MBR membrane pool; a gap is reserved in the bottom of the MBR membrane pool; a diffuser is arranged at the bottom of the MBR membrane assembly; a fan is arranged above the box body; the diffuser is connected with the fan through a pipeline; a clear water collector is arranged on the top of the MBR membrane assembly, and is connected with a clear water pump; and partition plates with openings in bottoms are arranged among the hydrolysis acidification pool, the anaerobic tank and the aerobic tank. The horizontal MBR membrane sanitary sewage processor has the beneficial effects of high sewage treatment capacity and compact layout, and is an MBR membrane sewage processor with certain pretreatment and impact resistance.