335results about How to "Reduce COD" patented technology

The invention discloses a seawater factory-style circulating water fish farming treatment method which comprises, removing the residual bait and excrement from the seawater flowing out of the fish pond through full-automatic conduit pipe filter apparatus, entering foam separate tank from the circulating pump to remove part of the suspended matter and protein, then removing ammonia nitrogen through biological cleaning tank, adjusting water temperature and pH, disinfecting through ultraviolet rays, oxygenation, charging the detected water into the fish pond again, thus completing a circulation.

The invention relates to a complex heavy-metal waste water emergency quick treatment method, comprising the following steps of: filtering by a sand filter; mixing by a high-speed pump; carrying out an ultraviolet catalyzing ozone reaction; carrying a microwave catalyzing active carbon reaction; carrying micro-electrolytic reaction; circulating waste water; carrying out a Fenton reaction; carryingout electric flocculation on an aluminum electrode plate; and pressing and filtering sludge. Waster water in a circulating slot is pumped into an iron carbon fluidized bed by a fluidizing pump to be circularly treated; an air compressor is connected with the iron carbon fluidized bed and prevents a filler in the iron carbon fluidized bed from blocking; and the microwave active carbon reactor is an active carbon filling tower, and a microwave emitter is arranged outside the body of the active carbon filling tower. The complex heavy-metal waste water emergency quick treatment method disclosed by the invention is used for treating the complex heavy-metal waste water, associated devices are simple, easy, quick, can meet an emergency, and can update and convert, no various chemical raw materials are fed, and various complex heavy-metal waste water with unknown elements can be quickly treated as long as the current magnitude is regulated, and thus the heavy metal in the waste water and chemical oxygen demand can immediately reach the standard and are discharged.

The invention discloses a method for processing a landfill leachate, which comprises the following steps of ammonia nitrogen removal, flocculent precipitate, electrolysis, capacitance desalination, anaerobic treatment, aerobic treatment, membrane filtration and membrane concentrate treatment. The method for processing the landfill leachate has the advantages that an electrolysis technology, a membrane technology and a bio-chemical technology are combined to form a method for processing the landfill leachate, the method has the characteristics of stable operation, strong adaptive capacity on water quality change, low cost, high treatment efficiency, effective reduction of index of ammonia nitrogen, COD, SS, chromaticity in the landfill leachate and standard discharge of effluent.

The invention discloses a treatment process of waste water polluted by the pesticide of Dursban, and the process includes the procedures of acid eduction, complexation and extraction, Fenton oxidation and catalytic oxidation. The invention is characterized in that Dursban waste water and herbicide Pendimethalin waste water are comprehensively treated, thereby achieving the proposal of waste controlled by the waste, decreasing the load of organic pollutant being hard to be graded in the waste water, improving the biological degradability of the waste water, removing the pollutant from the waste water, and increasing the biochemical performance of the waste water. Besides, the invention has the advantages of safe and advanced technique, clean operation and low waste water treatment cost.

The invention relates to a washing process for a denim garment. The washing process comprises the following steps: performing bio-enzyme de-sizing treatment in an amylase solution after performing denim garment fabric pre-treatment; performing enzyme washing by neutral enzyme powder; dehydrating and drying after cleaning with clean water; performing monkey wash on the fabric surface; performing neutralization treatment on the fabric which is subjected to monkey wash; adding a softening agent to perform softening treatment on the fabric; cooling the denim garment fabric to room temperature after dehydrating and drying, thereby completing washing on the denim garment. Compared with the prior art, the washing process has the advantages of quickly removing residual manganese ions, shortening the processing time, removing the color of a bleaching liquid, reducing the cleaning frequency, being low in sewage COD (chemical oxygen demand), and the like.

The present invention relates to a wastewater treatment composition and a process of decolorizing pulp and paper mill wastewater and, more specifically, to a process for treating wastewater effluent from a pulp or paper mill with a microorganism whereby color bodies in the pulp and paper wastewater are thereby removed and the wastewater is decolorized.

The invention relates to an additive used for monocrystalline silicon wafer alkaline flocking and an application method thereof, belonging to the technical field of solar batteries. The additive is prepared by the following components: ethanolamine, polyphosphate, sodium dodecylbenzene sulfonate, sodium hydroxide and water. A flocking agent is prepared through the following steps: (1) dissolving sodium hydroxide in deionized water so as to obtain alkaline flocking liquid; (2) adding the additive motioned above into the alkaline flocking liquid to obtain the flocking agent. During flocking, monocrystalline silicon wafers used for solar batteries are immersed in the flocking agent with temperature controlled to be 75 to 85 DEG C and flocking time controlled to be 15 to 18 minutes. The additive used for monocrystalline silicon wafer alkaline flocking in the invention enables flocking reaction time to be shortened and productivity to be enhanced; prepared texture surface pyramids have a uniform size and low reflectivity; the additive is applicable to solar battery silicon wafer alkaline flocking of different specifications and meets the purpose of industrial production.

The invention relates to a comprehensive treatment method of high-sulphur high-COD (Chemical Oxygen Demand) caustic sludge waste liquid. The comprehensive treatment method comprises the steps of: 1, acidizing high-sulphur high-COD caustic sludge waste liquid by using an N2/SO2 mixed gas, when the pH value of the waste liquid reaches 2-6, stopping acidizing; 2, sending tail gas discharged in the acidizing process in the step 1 to a sulphur production device for preparing sulphur; 3, settling the waste liquid generated in acidizing treatment in the step 1and recovering an oil phase; 4, further reducing the COD of the waste liquid by adopting an extraction method when the COD of the waste liquid after the oil phase is separated in the step 3 is always high; and 5, regenerating the waste liquid extracted in the step 4 by using lime. The comprehensive treatment method is low in investment, is mild in operation conditions, is capable of recycling the caustic sludge waste liquid, avoiding the impact of the high-concentration wastewater on a wastewater treatment field, is also capable of recovering sulfide and crude carbolic acid from the caustic sludge waste liquid, and has a certain economic benefit.

The invention discloses an advanced oxidative coupling device and process for treating organic wastewater difficult to degrade. A main device body comprises an ozone oxidation-multi-dimensional electro-catalysis/microelectrolysis area, an ozone oxidation-microelectrolysis/Fenton area, a coagulation area and an inclined plate sedimentation area, wherein the ozone oxidation-multi-dimensional electro-catalysis/microelectrolysis area comprises a multi-dimensional electrolysis/microelectrolysis area at the upper part and an ozone oxidation area at the lower part; the ozone oxidation-microelectrolysis/Fenton area comprises a microelectrolysis/Fenton area at the upper part and an ozone oxidation area at the lower part. The device combines four levels of advanced oxidation systems, and electrocatalytic oxidation, ozone oxidation, Fenton oxidation and a microelectrolysis reaction are mutually coupled in function, so that an organic matter difficult to degrade is subjected to multi-level oxidation to realize complete oxidative cracking; when the device is used for treating the organic wastewater difficult to degrade, the yield and the production rate of *OH are increased, the liquid phase transfer process is accelerated, the overall current efficiency of the device is increased, operation expenses are saved, flexible regulation and control of a process unit are realized, and the device can be used for treating various kinds of organic wastewater difficult to degrade.

The invention discloses a productive technology of vanlillin by a glyoxylic acid method. The productive technology comprises a synthesis process, a fractionation process and a purification process, wherein the synthesis process comprises condensation treatment, oxidation treatment and decarboxylation treatment of methyl catechol and glyoxylic acid. The productive technology particularly comprisesthe following steps: respectively converting the methyl catechol and the glyoxylic acid into guaiacol sodium and sodium glyoxylate in a sodium hydroxide system; carrying out condensation treatment onthe guaiacol sodium and the sodium glyoxylate; after recovering the unreacted methyl catechol in a condensation liquid, carrying out oxidation treatment, namely carrying out catalytic oxidation on anethanol group in 4-hydroxy-3-methoxybenzene sodium glycolate by using copper oxide in the sodium hydroxide system to form a ketone group, thereby generating a corresponding ketonic acid compound; after separating red copper oxide particles from an oxidation liquid, carrying out decarboxylation treatment, namely using sulfuric acid to acidize the oxidation liquid, and simultaneously converting an acid group in the ketonic acid compound into carbon dioxide so as to generate 4-hydroxy-3- methoxybenzaldehyde; and carrying out the fractionation process and the purification process to obtain the vanlillin.

The invention discloses a composite reagent for deep removal of heavy metals in wastewater and a preparation method thereof. The composite reagent is prepared from the following raw materials in parts by weight: a component A including 20-30 parts of modified attapulgite powder, 30-50 parts of a modified natural high molecular polymer and 0-3 parts of a surfactant; a component B namely an inorganic flocculating agent, wherein the weight ratio of the component A to the component B is (2.5-8.3):1. The composite reagent disclosed by the invention has very strong adsorption, chelating and flocculation performances on heavy metal ions in water, has a plurality of effects of auxiliary reduction of COD (chemical oxygen demand), decoloration, dephosphorization and the like at the same time, and is good in treatment effect, and the preparation method is simple and easy.

The invention discloses a coking wastewater comprehensive treatment method comprising the following steps of: pre-treatment, biochemical treatment and deep treatment. The deep treatment step comprises sequential steps of filtering, ultra-filtering, carrying out resin adsorption, re-filtering, and carrying out reverse osmosis. With the adoption of a coking wastewater comprehensive treatment system of the coking wastewater comprehensive treatment method, the pre-treatment step adopts a de-oiling pond, an adjusting pond and an air floating pond, which are connected in sequence; the biochemical treatment step adopts a primary aeration pond, a primary settling pond, an oxygen-poor pond, an aerobic pond and a secondary settling pond, which are connected in sequence; and the deep treatment step adopts a multi-medium filter, an ultra-filtering device, a resin adsorption column and a reverse osmosis device. The coking wastewater comprehensive treatment method has the beneficial effects that the method is stable to operate and has a simple process and good treating effects.

The process of treating waste water containing metal complex includes: regulating pH value to 2-4 and adding H2O2, contacting with iron powder in a fluidized bed reactor to produce displacement reaction and complex eliminating reaction, adding alkali in a deposition tank one deposit metal ion, and separating supernatant and the lower precipitate. The process can prevent the aggregation and deactivation of iron powder in the reaction, and has greatly raised reaction efficiency, low cost and high waste water treating effect.

The invention relates to a method for treating and recycling circulating water and sewage, which comprises the following steps of: adding an oxidative bactericide and a catalyst into the sewage for chemical reaction, performing flocculation precipitation on reacted wastewater, adding wastewater subjected to flocculation precipitation into a membrane system for treating, and recycling recycled water subjected to membrane treatment to a circulating water system. Compared with the prior art, the method can effectively reduce the chemical oxygen demand (COD) of the wastewater, can reduce the content of bacteria in the wastewater, and meets the requirement of recycling the treated wastewater to the circulating water system.

The invention discloses a surface sizing agent for papermaking, and a papermaking method for improving paper strength and water resistance. An active component of the surface sizing agent is prepared by a polymer polysaccharide compound and phyllosilicate in a weight ratio of 99.5-5:0.5-95. The papermaking method includes: preparing water-containing fiber papermaking pulp, an aqueous solution of the polymer polysaccharide compound, and a phyllosilicate-containing colloid solution or dispersion, mixing the phyllosilicate-containing colloid solution or dispersion and the aqueous solution of the polymer polysaccharide compound to obtain a surface sizing solution, feeding the water-containing fiber papermaking pulp onto a screen, filtering water to form paper sheets, allowing the paper sheets to pass through a dehydration process and a drying process to obtain base paper, coating the surfaces of the base paper with the surface sizing solution to obtain sized paper sheets, and drying. By using the surface sizing agent to papermaking, tensile strength and compression strength of the prepared paper are obviously enhanced, water-resistant and moisture resistant capabilities are largely improved, and the using amount of traditional chemical sizing agents is obviously reduced.

The invention discloses a recycling device used for papermaking advanced treatment wastewater and based on chemical decalcification. The recycling device comprises a chemical decalcification system, a filter system, an electrolysis system, a membrane separation system and a desalting system, wherein the chemical decalcification system is equipped with a dosing system, and the membrane separation system is one of an ultrafiltration system and an MBR (Membrane Bio-Reactor) system. The recycling device combines a chemical decalcification technology, an electrochemical technology and a membrane technology, and 70-85% of the papermaking advanced treatment wastewater can be regenerated and recycled after treated, so that wastewater discharge is reduced; environmental pollution due to the wastewater is avoided; waste of a water resource is reduced; the cost of the regenerated circulating water can be lower than that of tap water; and the recycling device is economical and reasonable, generates better economic benefits, lowers a water consumption index and a wastewater discharge index per ton of paper greatly, and raises economic and technical indexes of an enterprise.

The invention provides a novel inorganic compound phosphoric polyferric sulfate flocculant and a production technology thereof. The flocculant can be used in both water treatment and sewage treatment thereby being multifunctional. The phosphoric polyferric sulfate of the invention takes the by-products generated in titanium pigment production, such as ferrous sulfate, phosphoric acid and the like for producing titanium pigment as raw materials thereby having the characteristics of utilization of waste products, simple components, low cost and the like. The production technology of the invention is convenient, has simple operation and can be carried out at normal temperature and normal pressure. In the production process, no liquid waste, waste gas and waste residue can be generated, and the production technology belongs to the cleaner production technology. The invention can be widely applied in water treatment and sewage treatment. Especially in water treatment, the phosphoric polyferric sulfate flocculant of the invention is added to effectively remove soluble phosphorus and phosphorus in other forms in water as well as algae in algae waste water, lower chemical oxygen demand (COD), total phosphorus (TP), suspended solid (SS), chlorophyll (chl-a) and the like.

The invention discloses a treatment method of a concentrated solution produced from landfill leachate by a membrane method. The treatment method comprises the following steps of enabling the concentrated solution produced from the landfill leachate by the membrane method to sequentially pass through a composite softening coagulation and sedimentation pond, an ozone oxidation reactor, a hydrolyzing pond and an anaerobic MBR pond, and enabling effluent water from the anaerobic MBR pond to enter a nanofiltratoin system; enabling a permeation solution obtained through treatment of the effluent water in the nanofiltratoin system to be treated by a pressure contact oxidation reactor, and directly discharging the treated permeation solution, or after filtering the treated permeation solution by a multi-medium filter, discharging the filtered permeation solution; mixing a concentrated solution obtained after treatment by the nanofiltratoin system with the landfill leachate so as to obtain a mixed solution; and performing concentration treatment on the mixed solution by a biochemical method, an MBR method and the membrane method so as to obtain a concentrated solution, enabling the concentrated solution to enter the composite softening coagulation and sedimentation pond, and performing subsequent operations. The treatment method disclosed by the invention not only is suitable for treatment of the concentrated solution produced from the landfill leachate by membrane filtration, but also is suitable for treatment of other membrane concentrated solutions containing high concentration of organic compounds which are difficult to degrade.

The invention belongs to the technical field of a sewage treating agent and especially relates to a treating agent applied to papermaking sewage. The treating agent applied to the papermaking sewage comprises the following components by weight part: 40-55 parts of flocculating agents, 15-25 parts of chelating agents, 10-15 parts of adsorbents and 5-35 parts of PH(Potential of Hydrogen) regulators. The treating agent can enable the physicochemical indexes of the papermaking sewage to meet the GB18918-2002 standard, the contents of COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand), SS (Suspended Solids) and metal ions are effectively reduced and the PH is approximately neutral and meets a emission standard.

The invention relates to the technical field of wastewater treatment, in particular to an advanced treatment process for fermentation antibiotic wastewater. The advanced treatment process comprises the following steps: the fermentation antibiotic wastewater subjected to biochemical treatment is sent into a coagulation reaction tank, and a coagulant and a coagulant aid are added for a reaction; effluent of the coagulation reaction tank is subjected to precipitation separation treatment in a coagulative precipitation tank, and floc precipitates obtained after precipitation are sent into a sludge thickener; effluent of the coagulative precipitation tank is sent into a catalytic oxidation reaction tank and subjected to a Fenton catalytic oxidation reaction; effluent of the catalytic oxidation reaction tank is sent into a catalytic oxidation precipitation tank for precipitation separation treatment, flocs in the effluent obtained after an oxidation reaction are precipitated in the precipitation tank, and precipitated flocs enter the sludge thickener; effluent of the catalytic oxidation precipitation tank enters a two-membrane process desalter for desalting treatment, and the fermentation antibiotic wastewater treated with the process is high in quality and can meet the requirement for reuse of reclaimed water.

The invention discloses an H acid waste water treatment method. The method includes the steps that 1, the pH of H acid waste water is adjusted to 2-4, then ferric salt or ferrous salt is added, after the temperature is raised to 40-60 DEG C, hydrogen peroxide is added, and a Fenton oxidation reaction is conducted; 2, the pH of a product of the Fenton oxidation reaction is adjusted to 8.5-11, flocculation and filtration are conducted sequentially, and treatment is completed. In step 1, the pH of the H acid waste water is adjusted to 2.5-3.5, the adding amount of the ferric salt or the ferrous salt is 0.2-2% the mass of the H acid waste water, the mass fraction of the hydrogen peroxide is 27-30%, and the adding amount of the hydrogen peroxide is 2-20% the mass of the H acid waste water. The H acid waste water treatment method is simple in procedure, low in cost and suitable for being applied and popularized in industry.

The invention provides a novel Fenton fluidized bed and a wastewater treatment method thereof. The Fenton fluidized bed comprises an oxidation tower, a sieve plate, filler A, filler B, a Fenton oxidation zone, a ferric carbon reaction zone, a water inlet and distribution zone, a water outlet zone, a water outlet groove, a circulating device and necessary pipe fittings. The wastewater treatment method provided by the invention comprises the following steps: treating wastewater by adopting the Fenton fluidized bed, and distributing water by virtue of an annular perforated pipe and a bottom-layer sieve plate; reducing COD of the wastewater and persistent organic pollutants by carrying out Fenton reaction, then enabling the wastewater to enter the ferric carbon reaction zone, and further carrying out catalytic oxidation on the persistent organic pollutants in the wastewater under the ferric carbon microelectrolysis condition. The Fenton fluidized bed provided by the invention is optimized in structure, economic, reasonable and high in treatment efficiency.

The invention discloses a treating method for concentrating and separating ceftazidime mother liquor by using a membrane separation technology. The treating method mainly comprises the following steps: (1) carrying out pretreatment on the ceftazidime mother liquor to be treated, and removing fine suspended matters in the mother liquor; and (2) under the condition that the operation pressure is 0.5 to 4.0MPa, and the temperature is 10 to 80 DEG C, carrying out concentration and separation to a nanofiltration component for the ceftazidime mother liquor after pretreatment, obtaining concentrated liquor with the mass fraction of ceftazidime of more than 10 percent, collecting and then carrying out crystallization treatment; and the obtained permeate is discharged into a sewage treatment station for treatment. The treating method has the advantages of: effectively concentrating the ceftazidime mother liquor, not only recovering effective ingredient in the mother liquor, namely the ceftazidime, ensuring the quality of the ceftazidime, but also reducing the indexes of COD and BOD and the like discharged by the mother liquor, reducing the pollution and energy consumption, and having obvious economical and social benefits. The treating method can be widely applied in occasions needing to concentrate and recover the ceftazidime.

The invention discloses a sewage physicochemical treatment method and a device. The method has the concrete steps that: (1) the PH value of the sewage is measured; (2) when the PH value of the sewage exceeds the range of 5 to 8, acid or alkali is added to adjust the PH value to range from 5 to 8; (3) composite reducing agent is added to the sewage of the step (2) for reaction; (4) composite flocculant is added to the sewage of the step (3) for reaction; (5) composite oxidant is added to the sewage of the step (4) for reaction; (6)coagulant aid is added to the sewage of the step (5) for reaction; (7) the sewage to which the medicines are added is processed by solid-liquid separation, and then settled sludge and floating slag are removed; and (8)finally qualified water can be taken out. The invention provides the sewage physicochemical treatment method and the device, capable of efficiently treating substances and heavy metals which are hard to be degraded by microbes in the sewage, and having the advantages of convenient operation and low running cost.

The invention discloses an eutrophicated river water quality purifying method. The method comprises the following steps of: intercepting eutrophicated river into upstream, midstream and downstream parts; then conveying water of the upper part into an electrolyzing machine to be electrolyzed; then, discharging the electrolyzed water into the midstream part to be subjected to aeration treatment at the midstream part; and finally, flowing the water subjected to the aeration treatment to the downstream part. The eutrophicated river water quality purifying method adopts a method for firstly electrolyzing and secondly aerating, and can effectively inhibit the growth of algae in the water and an anaerobic reaction of a water body; an organic matter is decomposed, and total nitrogen, total phosphorus and chromaticity in the water are reduced and the odor is removed, so as to improve the river water quality and recover a water ecological system in a shorter time. The invention further discloses a river water quality purifying device, comprising a rubber dam, a water pump, the electrolyzing machine and an aeration device. The river water quality purifying device can be directly mounted in a river to directly purify river water; and the river does not need to be specially leaded to a pre-set structure to be treated, and the river water quality purifying device nearly does not change an environment, so that the influences to a natural environment are smaller.

The invention belongs to multiple-stage treatment methods of waste water and treatment systems thereof, and particularly discloses treatment methods of landfill leachate and treatment systems thereof. One of the treatment methods comprises the following steps of: firstly, mixing the landfill leachate and anaerobic sludge to perform complete reaction; secondly, performing electrochemical reaction to obtain flocs and initially depositing effluent water; finally, adjusting the pH value, adding Fenton reagents and mixing the effluent water and aerobic sludge after the complete reaction between the Fenton reagents and the leachate in a later phase. In the other method of the invention, the mixing and reaction between the leachate in the initial phase and the aerobic sludge are performed before the electrochemical reaction and other steps are the same. The invention also provides two different treatment systems for the two different treatment methods. The systems are formed by optimally combining a pre-treatment tank, an anaerobi reaction tank, an electrochemical reaction tank, a deposition tank, an oxidation tank, a regulating tank, a biochemical reaction tank and a sludge concentration tank. The treatment methods have the advantages of wide application range, small influence of environment, low operation cost, good treatment effect and the like.

The invention relates to a process for 6-APA or 7-ADCA production waste water recycling resource and biochemistry pretreatment, and belongs to the field of chemical technology. The process for 6-APA or 7-ADCA production waste water recycling resource and biochemistry pretreatment comprises an extraction step, that is a extractant compsed of a complexing agent and a cosolvent are added into the water phase for extraction. According to the invention, after phenylacetic acid is recycled, the aqueous COD is reduced from 50000-60000 mg/L to 2500-3000 mg/L, thereby the COD of the waste water is substantially reduced, and the biodegradability is improved, and the requirement of the environmental protection biochemical treatment process is satisfied; after the environmental protection biochemical treatment, the water can reach the discharge standard, simultaneously sodium sulfate in water phase obtained by complexation extraction is recycled, and the recycled sodium sulfate can be used for fermentation production once again, thereby reducing production cost and saving resource.

The invention discloses pseudomonas plecoglossicida and application thereof and particularly provides pseudomonas plecoglossicida BD with the preservation number being CGMCC No.14205. The provided pseudomonas plecoglossicida BD can grow and propagate with nitrile compounds as the only energy source, can degrade contaminants such as the nitrile compounds in acrylonitrile waste water and reduces the chemical oxygen demand and the biochemical oxygen demand of the acrylonitrile waste water, and accordingly the biodegradability of the acrylonitrile waste water is improved.

The invention relates to laboratory waste water treatment, in particular to a laboratory waste water treatment method and a device. In the method, laboratory waste water is subject to internal electrolysis, micro electrolysis and biosorption in sequence; aeration is carried out along with treatment; sludge produced in waste water treatment is dried, and the drying treatment is characterized in that gas produced in the aeration process is used for drying the sludge. The device comprises an electric control system and a waste water treatment unit, wherein, the waste water treatment unit comprises an inner electrolytic cell, a micro electrolytic cell, a biosorption cell and a desilter which are sequentially connected from front to back; the inner electrolytic cell, the micro electrolytic celland the biosorption cell are all provided with an aeration system; in addition, the device of the invention is also provided with a sludge filtering cell for treating sludge. The method and the device of the invention can be widely applied in treating waste water in various organic chemical engineering laboratories.

The invention relates to the field of livestock and poultry feces treatment methods, and in particular relates to a deep dehydration recycling method for livestock and poultry feces. The method specifically comprises the following steps: adjusting the pH value of the livestock and poultry feces to be 2-4, adding ferrite or ferric salt into the livestock and poultry feces with the adjusted pH value, uniformly stirring, subsequently adding hydrogen peroxide into the livestock and poultry feces, stirring for 50-180 minutes, adding a phosphorus curing agent into the treated livestock and poultry feces, adjusting the pH value to be 8.5-10.5, uniformly stirring, and performing filter pressing on the treated livestock and poultry feces by a filer press for dehydration. The method is high in speed, short in period, high in solid recycling rate, high in dehydration degree, low in energy consumption and low in cost.