84results about How to "Improve biochemical efficiency" patented technology

The invention relates to a flexible tubular solid liquid processor, with filter, heat exchange and thermal extraction functions, wherein the filter element at least comprises one flexible tubular membrane unit, upper flange room and lower flange room; the hydraulic extracting system comprises pressure container, extract pump and tubes; the material liquid of container can be filtered by the tubular filter membrane of membrane unit, and said material liquid can be used as work medium to extract the concentrated material liquid in the filter room of membrane unit and discharge filter slag; the pressure container or the filter room of membrane unit can be filled with medium to exchange heat, to realize thermal filter or extraction; the filter element is arranged on the bearing base inside the pressure container; the filter rotator can rotate the filter element to realize cross-flow filter; and the invention can be arranged with gas or water reverse tube and vacuum filter tube; the slag discharge system comprises slag discharger or tubular inner / outer membrane scraper, or vibration slag discharger, or compression slag discharger.

The invention discloses a method for treating wastewater containing molasses alcohol. The specific process of the method comprises the following steps: firstly, carrying out the coagulation sedimentation pretreatment on the wastewater; further carrying out the two-stage anaerobic treatment on the pre-treated wastewater; then, carrying out the aerobic treatment on the treated wastewater; and finally, carrying out the advanced oxidation treatment on the treated wastewater on the basis of the Fenton advanced oxidation method and air floatation method. The method of the invention has the advantages of simple operation, low treatment cost and high biochemical efficiency, and guarantees that the effluent subjected to the advanced treatment can meet the standards.

The invention discloses a method for treating yeast wastewater. The treatment method comprises the following steps: firstly, performing coagulative precipitation pretreatment on wastewater; secondly, performing anaerobic treatment on the pretreated wastewater; thirdly, performing aerobic treatment on the wastewater after the anaerobic treatment; and finally, performing advanced oxidation treatment on the wastewater after the aerobic treatment by a Fenton advanced oxidation method and air floatation. The treatment method has the advantages of simple operation, low treatment expense, high biochemical efficiency, guarantee of up-to-standard water by advanced treatment and the like.

The invention discloses a chemical synthetic pharmaceutical wastewater treatment device. The device comprises a pre-exposition adjustment pond, an enzyme supplementation anaerobic pond, an enzyme supplementation contact oxidation pond, an MBR biochemical pond and a sludge concentration pond; a reflux pipeline is connected between the pre-exposition adjustment pond and the enzyme supplementation anaerobic pond, a reflux pipeline is connected between the enzyme supplementation anaerobic pond and the enzyme supplementation contact oxidation pond, and a reflux pipeline is connected between the enzyme supplementation contact oxidation pond and the MBR biochemical pond; a biological suspension ball and an oxidation reduction potential (ORP) control system are arranged in the pre-exposition adjustment pond; an ORP control system, an MLSS online monitor and a DO online monitor are arranged in the MBR biochemical pond. The invention further discloses a sewage treatment method adopting the device. The method is resistant to high salinity, high in COD removal rate and remarkable in decoloration function, and the decoloration effect of wastewater high in treatment difficulty and the degradation effect of organic matter hard to degrade are remarkable. Moreover, the treatment cost is low, operation is simple, and the effluent quality index is stable; a composite biological enzyme obtained through the method can keep activity for a long term, and therefore the system has a long-lasting treatment effect.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for treating coking wastewater. The invention provides the method for treating the coking wastewater, which has the advantages of simple operation, low cost and good treatment effect and can directly discharge effluent. The invention adopts the following technical scheme that (1) various wastewaters in a factory are discharged into a horizontal oil isolating tank through sewage pipelines, the oil isolating tank is provided with an oil scraper which periodically removes floating oil on thesurface, and the effluent of the oil isolating tank enters an air floating system for oil removal; (2) the effluent of the air floating system automatically flows into a wastewater mixing regulationtank to balance the water quality and water quantity; (3) the effluent of the mixing regulation tank enters a VTBR biological oxidation tower through a lift pump to be treated, most of COD is removed,phenol, cyanogen and other harmful substances are removed, and nitrogen is removed through nitration and denitrification; (4) the effluent enters a secondary sedimentation tank; and (5) the effluententers a sand filter and an active carbon adsorption device, then enters an ultra-filtration and reverse osmosis apparatus, and is discharged after reaching the standard.

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.

Provided is an apparatus for producing reclaimed water based on electrolysis and double membrane technologies. The apparatus is disposed with an electrolysis system, an MBR system and a reverse osmosis system. Further provided is a method for producing reclaimed water using the apparatus, comprising the following steps: retrieving biochemical sewage through a water pump (12) and inputting the biochemical sewage into an electrolysis apparatus (13) of the electrolysis system to be electrolyzed, then enabling the sewage to enter an MBR reaction tank (26) through a grid (22) to obtain primary reclaimed water, pumping the primary reclaimed water into the reverse osmosis system with a high pressure pump (45) to separate dialysis water and concentrated water, enabling the dialysis water to enter a reclaimed water storage tank (48) to obtain ultrapure reclaimed water, enabling a part of the concentrated water to flow back for cyclic membrane filtering and separation, enabling a part of the concentrated water to flow back to enter an electrolysis procedure for cyclic use, and discharging the rest part of the concentrated water.

The invention discloses a composite purification regulating and controlling system for a water body in a cultivation pond, which is vertical to pond banks at two sides of the cultivation pond. A plurality of micro hole aerator pipes are uniformly configured at the bottom of the bond; a strand upper rope cord is placed correspondingly at the water level position above each micro hole aerator pipe; aquatic plants are sown on the strand upper rope cords at intervals; meanwhile, floating balls are installed on the rope cords for maintaining buoyancy; a plurality of vertical artificial water plants are distributed uniformly between each aerator pipe and the corresponding strand upper rope cord; and upper ends of the artificial water plants are fixed on the upper rope cord, and the lower ends of the artificial water plants are fixed on the aerator pipes which are fixed by fixing blocks. The system combines micro hole oxygen increasing, biochemical treatment and biological purification organically, improves the oxygen dissolving efficiency and biological purification effect, and has the characteristics that structure is compact, regulating and controlling are carried out in situ, energy consumption is low, installation is simple, and the like.

The invention relates to an alkaline and residual sludge coupled carbon cyclone releasing method and device. The alkaline and residual sludge coupled carbon cyclone releasing method includes the steps of 1), using alkali dreg wastewater to regulate the pH (potential of hydrogen) value of residual sludge to pre-treat the residual sludge with alkali; 2), further cracking and treating the residual sludge through cyclone releasing of carbon and regulating cracking strength through the reflux ratio of cyclone; 3), subjecting supernate of the residual sludge of the cracking treatment to pH regulation prior to hydrolytic acidification, wherein alkali process regulation is accompanied with the hydrolytic acidification process; 4), precipitating the residual sludge subjected to hydrolytic acidification and draining out the supernate to supplement the carbon source. The invention further provides the alkaline and residual sludge coupled carbon cyclone releasing device.

The invention mainly discloses a system and method for landscape fishpond purification treatment. According to the technical scheme, the system comprises a water quality monitoring device, a water purification device and a water surface decontamination device, the water purification device comprises a shell, a water inlet pipe, an aerator pipe, a blowdown pipe and a water outlet pipe, a filtering area, an active mud area and a sterilization area are arranged in the shell from inside to outside in sequence in a nested mode, and both the water inlet pipe and the blowdown pipe are connected with the filtering area; the water outlet pipe is connected with the sterilization area, the two ends of the aerator pipe are located outside the active mud area and the shell respectively, and the water surface decontamination device comprises a collection box, a stain adsorption head and a stain adsorption pipe. The method comprises the steps of 1, installing the water purification device; 2, installing the water surface decontamination device; 3; conducting water quality detection; 4, conducting water purification; 5, conducting water surface purification; 6, conducting detection again; 7, cleaning the devices. The system is reliable in performance, water purification can be conducted automatically, water quality purification efficiency is high, treatment time and period are short, and normal operation of a fishpond system is guaranteed.

The invention provides a novel wastewater treatment device, aiming to solve the problem of domestic wastewater treatment of the traditional ship and aiming to the special requirements on the ship. The device integrates coarse filtration, anaerobic biological treatment, fine filtration and aerobic biological treatment into a whole and adopts an embedded membrane filtering technology. A depositing chamber is internally provided with a coarse filter, and the coarse filter can automatically carry out ventilation washing according to the preset time to prevent blockage without artificial cleaning. Water is output through coarse filtration and enters a baffling chamber, an organic matter is further precipitated and degraded, output water thereof flows into a regulation chamber, and water inflow and uneven water quantity are automatically regulated through the regulation chamber. Output water of the regulation chamber is pumped into an external fine filter through a pump, filtered wastewater enters a membrane bioreactor, and the wastewater which accords with a drainage standard is drained after treatment. The wastewater treatment equipment and the method for the ship ensure that wastewater treatment reaches a new national drainage standard; and the equipment satisfies the requirements for low energy consumption and easy maintenance and cleaning.

The invention relates to a multilevel aerobic and anoxic coupling sewage biochemical treatment method, which belongs to the field of environment-friendly water treatment. The invention discloses a biochemical reactor, which is provided with a plurality of diversion barrels, microbial carriers which are arranged inside and outside the diversion barrels and aeration devices which are arranged inside the diversion barrels. The method for treating sewage by utilization of the biochemical reactor is to provide the gas stripping amount for aeration in the diversion barrels through the aeration devices, to form aerobic biochemical environments inside the diversion barrels and anoxic environments outside the diversion barrels, to recycle the sewage in the aerobic environments inside the diversion barrels and the anoxic environments outside the diversion barrels, to realize aerobic and anoxic coupling, and to realize recycle between a plurality of aerobic and anoxic coupling areas by the method of assembling the plurality of the diversion barrels. The multilevel aerobic and anoxic coupling sewage biochemical treatment method can improve the efficiency of the biochemical reactor and reduce the sludge discharge of the biochemical reactor, and can particularly realize the multi-level nitrification and denitrification biochemical process in the same biochemical reactor.

The invention discloses a landfill leachate concentrated liquor zero-recharge treatment process which comprises the following treatment steps: (a) softening treatment: reducing the hardness of landfill leachate concentrated liquor; (b) nanofiltering treatment: enabling softened produced water to enter a nanofiltering membrane treatment device for salt separation; (c) reverse osmosis treatment: enabling the water produced by a nanofiltering membrane to enter a reverse osmosis membrane treatment device for concentration and separation; (d) wet oxidation treatment: enabling the nanofiltering membrane concentrated solution to enter a wet oxidation device for degradation; (e) evaporative crystallization treatment: enabling the reverse osmosis membrane concentrated solution to enter an evaporative crystallization device to be evaporated; and (f) biochemical treatment: mixing wet oxidation effluent, reverse osmosis membrane produced water and condensed water to form mixed wastewater, feedingthe mixed wastewater into a biochemical treatment device, and discharging biochemical effluent. The process can effectively realize zero-recharge and up-to-standard discharge of the landfill leachateconcentrated solution, and has the characteristics of good process stability, strong treatment effect, wide application range and the like.

A method for preparing fermentation broth of fruits and vegetables includes steps of mixing fruits, vegetables, bacteria liquid of Lactobacillus acidophilus, bacteria liquid of Bifidobactreium longum, bacteria liquid of Lactobacillus delbrueckii subsp. bulgaricus, and bacteria liquid of Streptococcus thermophilus, and processing fermentation to obtain the fermentation broth of fruits and vegetables. A fermenting course of the method could be controlled, and a fermenting period is reduced to 15 days.

A sewage recycling device based on electrolysis and membrane biological reactor (MBR) technology and a method thereof relate to the sewage treatment and recycling. The sewage recycling device is provided with an electrolysis system and an MBR system, wherein the electrolysis system is provided with a stop valve, a water supply pump and an electrolysis machine; the MBR system is provided with a grid, an MBR reaction tank, an MBR component, a blower, an aerator, a sewage pump, an effluent pump and a regenerated water storage tank. The method comprises the following steps: the advanced treatment sewage of a secondary sedimentation tank, which is through biochemical treatment, is extracted by a water pump and sent in the electrolysis machine for electrolysis, then the sewage enters the MBR system through the grid to remove the solid impurities generated through electrolysis, plankton, bacteria and colloid and obtain purified sewage; and the purified sewage treated by the electrolysis system flows in the MBR system through a pipe to perform solid-liquid separation, thus the recycling of sewage can be completed. By adopting the device and method, the advanced treatment and recycling of sewage can be realized, the sewage discharge can be reduced and the utilization efficiency of water can be increased.

This invention relates to a clean water device and a system including an immerged film bio-reactor, water, an aeration system, a separator, a technics flow and pipelines, a water safeguarding system, a chemical flush system and a program control system, in which, at least a separator is connected between an original pump of an adjusting basin and the original pipe of the reaction basin of the immerged film bio-reactor, which is suitable for poor water quality with many combos of oil and waste-soap solution with humanbody fat in particular and increases the ability of anti-pollution of the immerged hollow fiber film bio-reactor, and this filter separator can be taken as a generator for collecting and growing biochemical films.

The invention discloses a method for physicochemical and biochemical combined treatment of coking wastewater. The method comprises the following steps: adding a calcium source and sodium metaaluminateinto coking wastewater and stirring, removing precipitates, carrying out micro-nano ozone catalytic oxidation reaction on the coking wastewater subjected to preliminary dechlorination, carrying out A2O biochemical reaction on coking wastewater obtained after the pretreatment is completed to obtain biochemical effluent, carrying out coagulating sedimentation, carrying out primary reverse osmosis treatment to obtain clear liquid, namely wastewater meeting the discharge standard, carrying out adsorption treatment on the generated membrane treatment concentrated liquid by utilizing fly ash, and returning to the step (1) to carry out physicochemical and biochemical combined treatment of the next cycle. The method is good in coking wastewater treatment effect and high in treatment efficiency, the effluent index can completely meet the national current discharge standard, and the requirement of national standard discharge can be stably met for a long time.

The invention discloses a method for treating sewage through adoption of QTCNP technology. According to the method, aerobic denitrification composite flora and aerobic dephosphorization composite flora are added to synchronously remove COD, NH3-N, TN, and TP in an aerobic environment, and the sludge reflux ratio, the mixed liquid reflux ratio, and indexes, such as the PH value, DO value, sludge concentration, and sludge age, of an aerobic bioreactor are controlled to achieve efficient biological carbon, nitrogen and phosphorus removal. The COD removal rate can reach no less than 95%, NH3-N removal rate can reach no less than 95%, TN removal rate can reach no less than 85%, and TP removal rate can reach no less than 90%. The method is non-anoxic or anaerobic, is saved in investment, simple and stable to operate, low in treatment cost, and less in sludge production amount. The method is suitable for treating various sewage containing COD, NH3-N, TN, and TP, and can be applied to standard treatment of various sewage.

The invention relates to a method for treating high-concentration organic wastewater by anaerobic-aerobic deep coupling. The method comprises the following steps: introducing organic wastewater into an anaerobic reaction unit, and sufficiently mixing the organic wastewater with anaerobic granular sludge added into the anaerobic reaction unit in advance to perform anaerobic reaction; enabling anaerobic effluent obtained after anaerobic reaction to enter an aerobic reaction unit, and removing nitrogen through a synchronous nitrification and denitrification process; flowing part of effluent of the aerobic reaction unit back to the anaerobic reaction unit and fully diluting and mixing the part of effluent with the raw organic wastewater and granular sludge to carry out anaerobic reaction, andenabling the other part of effluent to enter a next treatment process or discharging the other part of effluent after reaching the standard. According to the invention, the anaerobic and aerobic reaction units are coupled to treat wastewater; anaerobic effluent enters the aerobic unit, the DO value in the water body of the aerobic unit is controlled, denitrification is effectively completed, thereflux ratio of the aerobic effluent is controlled, and the aerobic effluent returns to the anaerobic unit again, so that the ammonia nitrogen concentration in the anaerobic reactor is reduced, the activated sludge amount in the anaerobic reactor is ensured, and the anaerobic reaction efficiency is effectively improved.

The invention relates to a coking wastewater treatment process and a coking wastewater treatment system, belonging to the technical field of wastewater treatment. The treatment process comprises the specific step that coking wastewater sequentially enters a pre-treatment system regulating reservoir and an electric flocculation / air flotation reservoir, then enters a biochemical system hydrolysis acidification pool, an anaerobic reactor, an anoxic pond, an aerobic pond and a primary settling pond, and finally enters an adsorption reaction pond and a flocculation and settling pond. In the process, the anaerobic reactor adopts a forced external-circulating type IC reactor, so that the resistance to impact load and biochemical efficiency are improved, and meanwhile, dilution water does not need to be added; activated carbon powder is fed into the anoxic pond, so that the concentration of sludge is improved, and the decarbonizing and denitriding efficacies are improved; the aerobic pond adopts three-gallery type, only a few foams are generated, and defoaming water is not added; a large-bore-diameter adsorbing material is fed into the adsorption reaction pond, so that the organic matters, ammonia nitrogen and the like difficult to degrade and residual in the wastewater are adsorbed, the chroma is removed, and then after flocculation and settling and solid-liquid separation, the obtained water achieves the direct discharging standard in the table 2 of the GB16171-2012.

The invention discloses a biochemical treatment method, particularly relates to a method for increasing a biochemical treatment ability of printing and dyeing wastewater by utilizing enzyme activity soybean meal, and more particularly relates to the application of the enzyme activity soybean meal in a biochemical aerobic stage. According to the invention, the printing and dyeing wastewater which is subjected to a normal secondary treatment is processed in a biochemical system; a biochemical treatment system comprises two reserved openings which are connected with an enzyme medicament tank, a part of water sample is intercepted for pre-dissolving the enzyme activity soybean meal, and sewage sample mixed with the enzyme activity soybean meal returns back to the biochemical system; the pre-dissolving of the enzyme activity soybean meal is carried out by adopting interval ultrasound microwaves, and the processed water sample is fully and uniformly mixed in the aerobic tank for aerating and enters into the next treatment procedure through a certain residence time. The invention has the advantages of being simple in the technology operation, increasing the biochemical efficiency withoutchanging the existing biochemical system to a large extent, reducing the cost for extracting and applying the enzyme, and being more convenient for the filling of the medicament. The method disclosedby the invention has a great application prospect.

The invention relates to the technical field of environment pollutant treatment and particularly discloses a wastewater and garbage integrated treatment method and device for cold areas. Organic garbage is subjected to composting treatment, wastewater is subjected to biochemical treatment, and heat generated by composting is transmitted to a wastewater biochemical treatment system to maintain the temperature needed by micro-biological pollutant degradation; the bad smell generated by composting is introduced into the wastewater biochemical treatment system to achieve the purposes of bad smell removing and oxygen supply at the same time; residual sludge generated by settling of wastewater is properly treated and then serves as a raw aerobic composting material; leachate generated by aerobic composting is treated through a wastewater treatment system on site. By means of the wastewater and garbage integrated treatment method and device for cold areas, discharge of the bad smell, the leachate and the residual sludge can be completely eradicated, no secondary pollutants are generated, the comprehensive treatment cost is low, energy conservation and environment protection are achieved, and the wastewater and garbage integrated treatment method and device for cold areas are especially suitable for rural cold areas.

The invention discloses a swage disposal system for a ship and a disposal method of the swage disposal system. The sewage disposal system for the ship comprises an oil water separator, a precise filter, an ultraviolet sterilizing device, a resin adsorption system, an MBR membrane bioreactor, a liquid buffer tank and a membrane separator. The disposal method for the swage disposal system for the ship comprises the following steps: (1) sewage flows into the oil water separator; (2) the sewage enters the precise filter from the oil water separator to be filtered; (3) water flowing out of the precise filter enters the ultraviolet sterilizing device; (4) water flowing out of the ultraviolet sterilizing device enters the MBR membrane bioreactor; (5) water flowing out of the MBR membrane bioreactor enters the liquid buffer tank; (6) water flowing out of the liquid buffer tank flows to the membrane separator; (7) water flowing out of the membrane separator enters the resin adsorption system. The sewage disposal system is simple in structure and good in purifying effect.

The invention relates to a biochemical novel technology capable of realizing solar energy utilization. The method comprise the following steps: (1) microalgae in water synthesizes organic matters of the microalgae from inorganic substances of carbon dioxide, water and nutrient elements under a condition of sunlight radiation by photosynthesis, and a microalgae-containing suspension is obtained; (2) dissolved oxygen in water of the microalgae-containing suspension is removed by respiration of the microalgae in the absence of light, and a microalgae suspension without the dissolved oxygen is obtained; (3) the microalgae suspension is directly subjected to anaerobic fermentation without a separation process, and a combustible biogas is obtained, which is gathered and stored to keep in reserve as an energy source; (4) the fermentation liquor after anaerobic fermentation is subjected to aerobic biological oxidation, and the obtained product is recycled by returning to step (1). Compared with the prior art, the biochemical novel technology helps to realize efficient utilization of solar energy, the technology system is extremely simple, and the cost is extremely low.

The invention discloses a bio-enzyme immobilization method in the field of sewage treatment process, and specifically discloses a method for performing bio-enzyme immobilization through utilizing rice processing product rice bran. The method comprises the following steps: processing bio-enzyme, namely, adding hydrogen peroxide to an alkaline solution, mixing bio-enzyme with a NaOH water solution at the temperature of 30 to 35 DEG C, and then collecting supernate; adding a borate buffer solution to dissolve and precipitate; filtering to obtain alkaline protein modified enzyme liquid; mixing the alkaline protein modified enzyme liquid with rice bran in a proportion; spraying the alkaline protein modified enzyme liquid on the rice bran; and slowly drying so as to obtain the rice bran immobilization bio-enzyme. The method has the advantages of low production cost, wide raw material source and good sewage treatment effect.

The invention discloses a biochemical treatment process for a high-concentration nonbiodegradable coking wastewater. The characteristics and the existing domestic processing situation of the high-concentration nonbiodegradable coking wastewater are combined, and a process combined with an upflow anaerobic sludge bed reactor, an anoxic carrier fluidized bed biofilm reactor and a two-stage aerobic carrier fluidized bed biofilm reactor is adopted, so that the problem that the high-concentration coking wastewater is difficult to treat is solved. The biochemical treatment process is low in operation cost and high in biological efficiency, the concentration of pollutants such as COD (chemical oxygen demand), ammonia nitrogen and phenol in the coking wastewater, of which the COD is greater than or equal to 5,000mg / L and the ammonia nitrogen concentration is greater than or equal to 1,000mg / L, can be effectively reduced, the effluent quality reaches the direct emission standard in the 'emission standard of pollutants for coking chemical industry' (GB16171-2012), secondary pollution is not easily caused, and the biochemical treatment process is suitable for popularization and application.

The invention discloses a strain of alcaligenes sp. and application thereof to high-salt high-polymer waste water. The collection number of the alcaligenes sp. Z-1 provided by the invention is CGMCC No.12585. The alcaligenes sp. can effectively decompose macromolecular polymers, such as polyacrylamide, polysulfonate substances and the like, into micromolecular substances easy to degrade under the environment of high-salt high-polymer waste water, and can obtain energy by decomposing the organisms to maintain growth and reproduction. In the high-salt high-polymer waste water which contains the organisms, such as polyacrylamide, polysulfonate substances and the like, and is treated by the bacteria, the decomposition rate of the high polymer can reach above 95%, the COD (chemical oxygen demand) of the waste water can be effectively reduced and the COD removal rate can reach above 50%.

The invention discloses a comb shaped film-bioreactor with free end, which is characterized by the following: possessing film-biological reaction tank; equipping a baffle in the reaction tank; dividing the reaction tank into a sludge mixing oxidation area and a film component part water outlet area with the baffle; communicating the bottom of the sludge mixing oxidation area and the bottom of the film component part water outlet area; arranging a liquid level controller at the upper of the sludge mixing oxidation area; equipping an aeration head at the bottom of the film-biological reaction tank; assembling a comb shaped film-component part with a free end in the film component part water outlet area; connecting to third valve, outflow tube, subatmospheric pressure gage, water outlet sorption pump and pure water tank; connecting the water outlet sorption pump with a time delay relay; connecting the siphon tube road to the subatmospheric pressure gage and the pure water tank; connecting the aeration head to gas flow counter, second valve and aeration pump; connecting the liquid level controller to the first valve and raw water tank. This invention possesses the advantages of simple structure, convenient production and low energy consumption.

The invention relates to a vortex strengthening method and device for compact anaerobic / aerobic process wastewater treatment, and provides the vortex strengthening method for compact anaerobic / aerobicprocess wastewater treatment. The method comprises the following steps: (A) performing vortex treatment on compact anaerobic / aerobic process wastewater to release organic matter; (B) returning the wastewater containing the organic matter obtained in step (A) to an anaerobic zone of a compact anaerobic / aerobic process for degradation so as to reduce dissolved oxygen in the anaerobic zone. The invention further provides a vortex strengthening device for the compact anaerobic / aerobic process wastewater treatment.

The invention relates to a latter half of gestation sow complete formula feed capable of preventing dystocia and a feeding method thereof. Every 1kg of complete formula feed is prepared from the following components by weight: 600-640g of corn, 120-150g of bean pulp, 60-80g of extruded soybeans, 15-30g of fermented soybean meal, 40-60g of fermented bran and fermented kelp residues, 10-20g of freshwater mussel powder subjected to enzymolysis, 15-25g of compound chyle fat powder, 20-40g of glucose, 0.3-0.35g of composite vitamin, 1.0-1.5g of composite organic trace element, 0.2-0.5g of pig complex enzyme, 1.0-1.5g of choline chloride, 2.5-3.5g of lysine, 0.3-0.4g of ethoxyquinoline, 3.0-4.5g of table salt, 12.5-14.5g of mountain flour, 6.5-7.5g of calcium hydrophosphate, 0.1-0.15g of phytase, 0.15g of protease and the balance of lentinus edodes powder. From improving the constitution of a latter half of gestation of sow, the latter half of gestation complete formula feed effectively solves problems such as tear spots, gum and raccoon eyes of the sow, increases the food intake of the sow, effectively solves the dystocia problem and the postpartum recovery problem, and remarkably improves the health condition and the production performance of the sows and piglets.