2257 results about "Activated sludge" patented technology

Removal of biological nutrients from a wastewater yielding a low phosphorous (e.g., less than 0.25 mg/L) output includes providing a serial multistage bioreactor containing activated sludge having in hydraulic series an anaerobic zone and a downstream aerobic zone, with each zone having an upstream inlet and a downstream outlet. The wastewater is provided to the anaerobic zone inlet. A quantity of chemical sufficient to precipitate soluble and particulate phosphorous is added to the downstream aerobic zone in an amount sufficient to yield a low phosphorous output. Treated water is separated from the activated sludge and precipitated phosphorous and a return activated sludge separated from the treated water is recycled to the anaerobic zone.

An aqueous cutting fluid which can reduce the impact on working environment and the global environment, and can achieve both preventing precipitates from becoming a hard cake and keeping high dispersibility for abrasive grains is provided. Such an aqueous cutting fluid is obtained by a method comprising dispersing abrasive grains (G) in an aqueous composition comprising a dispersion medium (M) containing a hydrophilic alcohol compound such as ethylene glycol, a lipophilic alcohol compound such as propylene glycol and water, and silica colloid particles dispersed stably in the medium. The dispersion medium (M) is odorless and not flammable. The abrasive grains (G) may settle out after a time, but they do not closely contact with one another, and therefore the resulting precipitates do not become a hard cake, which allows the re-dispersion and reuse of precipitated grains. The instant aqueous cutting fluid is inherently low viscous, and the reduction of viscosity owing to the contamination of water and the increase of viscosity owing to contamination of shavings are both moderate. As a result, the cutting fluid has a long life. And articles which have been cut using the cutting fluid can be washed with water. Further, as the dispersion medium (M) is a biodegradable low molecular weight organic compound, a waste liquid from a process using the cutting fluid can be disposed with an activated sludge.

An apparatus using activated sludge for the removal of biological nutrients from a wastewater includes a bioreactor for containing a mixture of wastewater under treatment and activated sludge. The bioreactor is divided into a plurality of serially connected treatment zones and includes a wastewater inlet, a downstream aerobic zone and an upstream aerobic zone between the wastewater inlet and the downstream aerobic zone, the upstream and downstream aerobic zones being separated by an anoxic zone. A method for removal of nutrients from a wastewater includes providing a wastewater to an inlet of a serial, multi-zone, activated sludge bioreactor containing an activated sludge. The bioreactor has a downstream aerobic zone from which water is removed and an upstream aerobic zone between the wastewater inlet and the downstream aerobic zone, the upstream and downstream aerobic zones being separated by an anoxic zone.

A new biofilm-activated sludge Sequencing Batch Reactor (SBR) treatment process for sewage or wastewater has successfully been developed as the third generation SBR (SBR3). This new SBR3 process utilizes a multi-stage and multi-sludge SBR configuration receiving either continuous or intermittent inflow of wastewater. Each stage has individually controlled continuous or alternating anaerobic/anoxic/aerobic operation, with or without mixing and recycling from the other stage(s). The configuration and operation is dependent upon the treatment objectives and effluent discharge requirements. In the preferred embodiment, carriers are used to facilitate control of operating conditions.

The subject invention provides methods for producing homogenous organic base fertilizer for plant nutrition and soil fertility. Also provided by the subject invention are value added fertilizer products for plant nutrition and soil fertility and concentrated liquid formulations/nutrient supplements that provide the value added nutrients to fertilizer products. Methods according to the invention involve the application of concentrated liquid(s) and/or dry formulation(s) comprising a mixture of one or more plant nutrient(s), one or more additional organic compound(s), one or more penetrate(s), and one or more optional supplement(s) into one or more organic base material(s). These organic base materials include, and are not limited to, biosolids, activated sludge, municipal compost, animal manures (e.g., horse, cow, chicken, pig, and sheep), and composted organic byproducts.

The invention relates to a coal chemical wastewater treating technique, which comprises the following steps of: pretreating the coal chemical wastewater by an air-floatation device and obtaining pretreated wastewater; adding a fenton reagent into the pretreated wastewater to carry out secondarily treatment and obtaining secondarily treated wastewater; putting the secondarily treated wastewater into an activated sludge aeration pool and adding active carbon powder into the pool for deep treatment to obtain deeply treated wastewater; separating the deeply treated wastewater with a hyperfiltration membrane and obtaining separated recycled water; reversely penetrating the separated recycled water with a selective semi-permeable membrane and obtaining reversely penetrated recycled water; evaporating and crystallizing the reversely penetrated recycled water and finishing the wastewater treatment. The wastewater, after treated by the coal chemical wastewater treating technique, can realize the 'zero discharge' standard, meet the national environmental requirements, and obtain good economic and social benefits.

A wastewater treatment process providing nitrogen, phosphorus, biochemical oxygen demand (BOD) and suspended solids removal comprises the steps of: passing wastewater containing ammonia nitrogen, phosphate, BOD and suspended solids, said wastewater mixed with recycled activated sludge from a subsequent step, into a first anoxic zone therein reducing nitrate nitrogen from the recycled sludge to molecular nitrogen; passing effluent from the first anoxic zone to a first aerobic zone therein oxidizing at least a portion of the BOD and oxidizing at least a portion of the ammonia nitrogen to nitrate nitrogen; recycling a portion of the contents at the end of the first aerobic zone back to the first anoxic zone; passing the effluent of the first aerobic zone to a second anoxic zone; introducing volatile fatty acid such as acetic acid into the second anoxic zone therein releasing phosphorus into a liquid phase; passing effluent from the second anoxic zone including the volatile fatty acid to a second aerobic zone therein substantially absorbing phosphorus into biomass and removing and/or oxidizing ammonia nitrogen; passing effluent from the second anoxic zone to a final settling zone therein separating: (i) a purified wastewater having decreased nitrogen, phosphorus, BOD and suspended solids and (ii) a sludge containing suspended solids, phosphate and BOD; and recycling at least a portion of the sludge (ii) to the first anoxic zone. In another embodiment, at least a portion of the sludge (ii) is also recycled to the second anoxic zone. In yet another embodiment, the second anoxic zone is divided into a first section and a second section. In the first section, anoxic conditions are established and in the second section, volatile fatty acid is added after anoxic conditions have been established.

The invention relates to a treatment method and a device for refinery sewage. The refinery sewage is sent into an electrolytic catalysis oxidation reactor which is provided with an anode, a cathode and solid catalyst particles, wherein, the lower part of the reactor is provided with an oxygenation aeration device, the solid catalyst particles are filled between the anode and the cathode, and the solid catalyst particles adopts particle activated carbon loaded with metals having catalytic and oxidation function. The effluent of the electrolytic catalysis oxidation can be further treated by adopting an activated sludge process. The method is used for treating high-concentration salt-containing mixed wastewater such as the draining water of a refinery electrical desalting unit, the alkali washing waste alkali liquid of oils, liquefied petroleum gas and dry gas, and cutting water in an oils tank farm, and the like, the wastewater after treatment satisfies the requirement of direct discharging, thus alleviating impact on a wastewater treatment plant. The method put forward by the invention has the advantages that high-concentration wastewater can reach disposable treatment standard and does not need any dilution biochemical treatment, treatment effluent is not polluted secondarily by metal ions, and investment and running cost are lower, and the like.

Biological nutrient removal (BNR) in municipal wastewater treatment to remove carbonaceous substrates, nutrients and phosphorus, has recently become increasingly popular worldwide due to increasingly stringent regulations. Biological fluidized bed (BFB) technology, which could be potentially used for BNR processes, can provide some advantages such as high efficiency and compact structure. This present invention incorporates the fixed-film biological fluidized bed technology with the biological nutrient removal in a liquid-solid circulating fluidized bed, which has achieved the simultaneous elimination of organic carbon, nitrogen and phosphorus, in a very efficient manner and with very compact space requirements. The BNR-LSCFB has two fluidized beds, running as anoxic/anaerobic and aerobic processes to accomplish simultaneous nitrification and denitrification and to remove carbonaceous substrates, nutrients and phosphorus, with continuous liquid and solids recirculation through the anoxic/anaerobic bed and the aerobic bed. The new BNR-LSCFB system is not only an excellent alternative for conventional activated sludge type BNR technologies but is also capable of processing much higher loadings and suitable for industrial applications.

The invention discloses a enrichment method of nitrifying organism. The method adapts discontinuous activated sludge process by gradually improving ammonia nitrogen ph indicator in nutrient fluid to enrich. The main component of the enrichment nutrient fluid is inorganic salt comprising microelement Fe, Mg, Na, K and amortization liquor, in which inceptive concentration of NH(4)(+-N) is 100mg/L to 200mg/L, final concentration is 500mg/L to 1200mg/L and COD is less than or equal to 200mg/L. The method can restrain evidence the growth of sundry bacterium such as carbonizing bacterium, is propitious for nitrifying organism to become ascendency bacterium and resist more and more high ammonia nitrogen concentration, and finally disposing concentration of the ammonia nitrogen wasted water is up to 1200mg/L and high concentration ammonia nitrogen in wasted water can be reduce to less 10mg/L.

A wastewater treatment process uses enhanced primary treatment to remove suspended solids from raw wastewater. Primary sludge is treated in a fermenter. Primary effluent is treated by biological nutrient removal (BNR) to produce a treated effluent and waste activated sludge (WAS). The WAS is treated in an anaerobic digester, which also treats sludge from the fermenter. Anaerobic digestate is separated to provide a liquid effluent. The liquid effluent is stripped of phosphorous and returned to the BNR as a source of readily biodegradable carbon. Liquid in the fermenter may also be separated to provide a liquid rich in volatile fatty acids (VFAs). This liquid is returned to the BNR when additional VFAs are required.

The process of treating animal raising waste water includes the following steps: aerating animal raising waste water through stirring in a regulating pond, flocculating and precipitating in a reacting preliminary sedimentation tank, biodegrading inside a membrane bioreactor with active sludge, filtering through ultrafiltering membrane, and discharging. The present invention combines the active sludge process and the membrane bioreactor process well to degrade animal raising waste water completely, and the treating process is simple and easy to operate.

A process for treating wastewater through the use of powdered natural ligno-cellulosic materials (PNLM) for (a) physically removing colloidal and suspended volatile solids through adsorption and enhanced floc-formation and settling during pretreatment; (b) adsorbing toxic substances and elements that interfere with biological processes, thus serving to reduce their contact with and exposure to activated sludge organisms effecting wastewater treatment functions; (c) providing fixed surfaces in activated sludge wastewater treatment bioreactors for bacteria and other organisms favoring attached growth in circumstances devoid of such surfaces; (d) reducing production of biological sludge, while also helping to maintain high treatment efficiencies; and (e) following aeration, enhancing the settling characteristics of sludge with respect both to speed of settling and the vertical profile of the settled sludge.

A method of treating a mixture of microorganisms with readily biodegradable carbon compounds (RBCs) in the form of one or more volatile fatty acids (VFAs), by first inducing the mixture microorganisms to release phosphorus and magnesium which is then tapped o as the mixture is thickened, to produce a phosphorus/magnesium-nch liquid and a phosphorus/magnesium-reduced treated mixture This treated mixture is placed in an anaerobic digester where ammonia is formed, but combines very little with phosphorus or magnesium Next the high-ammonia mixture is dewatered to produce an ammonia-rich liquid, which is combined with the phosphorus and magnesium-rich liquid and reacted to form struvite In one preferred embodiment, VFAs are formed in situ via an upstream unified fermentation and thickening (UFAT) process and added to the waste sidestream to strip phosphorus and magnesium found therein In another preferred embodiment a usable struvite product is harvested.

The invention discloses a method for treating coking wastewater, which relates to the method for treating wastewater and aims to solve the problems that an activated sludge method for treating the coking wastewater has the disadvantage of relatively poorer effect on the removal of organic substances and the treated water is difficult to reach the secondary discharge standard of the Integrated Wastewater Discharge Standard (GB8978-96). The method comprises that: the coking wastewater is discharged after passing through an oil separation tank, an adjusting tank, an iron carbon-Fenton oxidation pond, an up-flow anaerobic sludge bed reactor, a multifunctional hydrolyzing pond, an anaerobic tank, a composite active sludge tank and a secondary sedimentation tank, wherein the coking wastewater can also pass through a floatation tank. The coking wastewater treated by the method of the invention has a pH value of 5 to 8 and the rate of removal of Cu2+ from the coking wastewater of 69 to 85 percent, contains 300 to 450mg/L phenol and less than 15mg/L cyanide and therefore reaches the secondary discharge standard of the Integrated Wastewater Discharge Standard (GB8978-96).

The invention relates to a method for preparing light foam concrete by using a compound protein foaming agent. The light foam concrete comprises 1-10 weight parts of foaming agent, 20-50 weight parts of concrete, 25-60 weight parts of fly ash, 1-10 weight parts of lime, 1-5 weight parts of gypsum, 0.5-2 weight parts of additive, and 27-40 weight parts of water, wherein the foaming agent comprises2.5-25 weight parts of activated sludge protein with a mass concentration 15-25 %, 0.1-1 weight parts of vegetable protein with a mass concentration of 20-40 %, 0.1-0.5 weight parts of stabilizing agent, and 73.5-97.3 weight parts of water. According to the invention, the compound protein foaming agent uses activated sludge protein and vegetable protein as the main components, and the stabilizingagent is used for modification, thus the foam stability of the protein foaming agent is raised. The preparation method has no need of steam pressure curing.

The invention belongs to the technical field of soil, and specifically relates to flower nutrient soil and a preparation method thereof. The flower nutrient soil comprises the following components in parts by mass: 30-35 parts of leaf mold, 25-30 parts of garden soil, 25-30 parts of river sand, 10-15 parts of activated sludge, 5-10 parts of bone meal, 10-15 parts of decayed farmyard manure, 10-15 parts of sawdust and 2-5 parts of active microorganisms. By using the technical scheme, the flower nutrient soil disclosed by the invention is rich in nutrient substances and short in fermentation time; leaf mold, garden soil, river sand and activated sludge are mixed, so that the flower nutrient soil is good in water retention and nutrient preserving capability, good in soil permeability, and low in cost; and by using the flower nutrient soil, flowers are robust and good cultivation effect is achieved.

The invention discloses a method for treating high-salinity high-concentration ammonia-nitrogen wastewater, characterized by: adopting sequencing batch reactor, accumulating nitrification sludge by alternately increasing the concentration of a nutrient solution or ammonia-nitrogen concentration, and domesticating to obtain high salinity-resisting high ammonia nitrogen-resisting nitrobacteria. According to the invention, the nitrobacteria can treat high-salinity wastewater having ammonia-nitrogen concentration of 500mg/L and having the salt content of no larger than 35g/L to make the effluent have the ammonia-nitrogen concentration of no larger than 10mg/L, thus the effluent achieve national level of discharging standard; the method has good effect on treating high-salinity high ammonia-nitrogen wastewater in chemical plant, leather factory, oil refinery and the like, can overcome the shortage that the nitrobacteria cannot simultaneously treat high-salinity and high ammonia-nitrogen wastewater existing in the prior art, and has important economic benefits and social benefits.

The utility model discloses a technology for treating coking wastewater by using a novel feeding activated sludge method, which comprises the following steps: biochemical treatment process is carried out on the pretreated wastewater, the coking wastewater first enters an A-grade biochemical pond to provide carbon sources for denitrification, and then the coking wastewater enters a 0-grade biochemical pond for carrying out oxidation and nitration under aerobic environment, the effluent water of the 0-grade biochemical pond enters a secondary sedimentation tank; the supernatant from the secondary sedimentation tank enters a subsequent-stage treatment system and one part of settling sludge refluxes and enters the A-grade biochemical pond and 0-grade biochemical pond; the other part of the settling sludge enters a sludge thickener. As flocculants are added into the biochemical pond, the ability of tolerating loads is greatly improved, and shock resistance is also greatly enhanced; the area of the biochemical reaction pond is reduced to 70 percent of the area of the reaction pond of traditional feeding activated sludge method, so investment costs are saved and operation costs are decreased; while the decolorizing ratio of the technology to coking wastewater, black liquor and chloromycetin wastewater can reach to more than 80 percent.

The invention relates to a method for treating salt-containing sewage. The pH value of the salt-containing sewage is adjusted to between 8 and 12, the salt-containing sewage is biochemically treated by an activated sludge process, the effluent after the activated sludge process treatment is treated by an ozone-catalytic oxidation process adopting a solid catalyst, and the effluent after the ozone-catalytic oxidation process treatment is discharged through a biofilter; and in the ozone-catalytic oxidation process adopting the solid catalyst, the solid catalyst is granular activated carbon loaded with an active component which is one or more of tin, copper, manganese, titanium, cobalt, vanadium and nickel. The method can effectively purify the sewage which has high salt content and is refractory to biodegrade, and the effluent after treatment has the COD of less than or equal to 50 mg/L and the NH3-N of less than or equal to 8 mg/L, so that the strict sewage discharge standard of developed regions is met. The method has the advantages of simple treatment process, no need of sewage dilution, clean and clear effluent after treatment and realization of direct standard discharge.

The invention discloses a method of harmless treatment to residual activated sludge produced by bottom sludge, scum and biochemical treatment units in the petrochemical industry, which comprises: emulsion breaking to the bottom sludge and scum; separation of oil, water and mud of products after emulsion breaking; and recovery of dirty oil at the upper part and sedimentation of mud-water mixture at the lower part, recovery of clear liquor at the upper part, and treatment of coagulation conditioning, flocculation conditioning, sludge concentration, sludge dewatering, sludge drying and sludge incineration to mud-water mixture at the bottom part and the residual activated sludge sequentially. The method can effectively recycle useful oil substances and aluminum-containing compounds in the bottom sludge and scum, purify possibly released malodorous gases in mud produced in the process of storage and disposal, and carry out the treatment such as sludge conditioning, dewatering and drying sequentially to the residual mass hazardous wastes after the recycling treatment, then utilize the current boilers in enterprises to implement the direct incineration treatment. The method has advantages of simple operation and running, safety and reliability, complete resource recovery, controllable water removal, and maximally reducing the environmental pollution.

The invention belongs to the technical field of the treatment of municipal sewage, and discloses a process and a device for treating sewage through denitrification and dephosphorization by an anaerobic-anoxic-oxic-anoxic (AAOA) plus membrane bioreactor (MBR) process. A rear anoxic tank is arranged on the basis of the traditional anaerobic-anoxic-oxic (A<2>/O) process flow; meanwhile, a membrane separation technology is used for substituting two sedimentation units of sedimentation tanks; according to the process, pre-treated sewage flows into an anaerobic tank, an anoxic tank and the rear anoxic tank respectively; and the sewage flows into an MBR tank through the anaerobic tank, the anoxic tank, an aerobic tank and the rear anoxic tank, is filtered by an MBR membrane component and is drained. By the process for treating the sewage, a carbon source in the sewage can be efficiently utilized by arranging the rear anoxic tank and changing influent and reflux modes, so that the denitrification and dephosphorization efficiency of the sewage is improved; and meanwhile, the membrane separation technology is used for increasing the concentration of activated sludge in the process for treating the sewage so as to realize the high-efficiency separation of mud and water in the sewage, so that the problems that the conventional process for treating the sewage is high in energy consumption, the floor area is large, and pollutants such as nitrogen, phosphorus and the like cannot be efficiently removed are solved. The water quality of effluent treated by the method meets the requirements of I-class A criteria of Integrated Wastewater Discharge Standard (GB 8978-1996).

The invention discloses a suspending film method of filler in biological contact oxidation pond, which comprises the following steps: fistedly domesticating activated sludge; adding nutrient solution into domestic activated sludge and armed waste water miscible liquids; mixing evenly; injecting into oxidation pond; aerating; cycle culturing; making microbe adhere on carrier; stewing and settling span; discharging all of sludge water miscible liquids; proceeding waste water culture from low density to high density continually till forming stable shockproof biological film.

The invention relates to a flower culture earth which is prepared from the following raw materials in parts by weight: 35-40 parts of leaf mold, 10-20 parts of mountain clay, 15-25 parts of garden soil, 5-10 parts of chicken manure, 2-6 parts of bulking agent, 2-7 parts of preservative, 15-20 parts of activated sludge, 15-20 parts of wood dust, 3-8 parts of active microorganism, 15-25 parts of plant ash, 1-5 parts of ammonium sulfate and 20-30 parts of bentonite. The flower nutrient soil has the advantages of abundant nutrient substances, short fermentation time, favorable water and fertility retentivity, favorable air permeability and low cost.

The invention discloses an enrichment culture method of salt-tolerant nitrifying bacterium communities, which comprises the steps that: activated sludge is inoculated, and the culture mode is the sequencing batch type enrichment culture; the enrichment culture is carried out in simulated wastewater, the main ingredient of nutritive salt of the enrichment culture is inorganic salt, the substrate is externally added ammonium salt, and a carbon source is inorganic carbonate; the pH value in an aeration tank in the enrichment culture process is regulated and controlled through sodium carbonate and sodium bicarbonate, and the dissolved oxygen value is regulated through the aeration quantity; a method for gradually increasing the salinity is adopted for domesticating the nitrifying bacterium communities; and when no filamentous bacterium is observed in the sludge and the number and the variety of protozoans are few, the enrichment culture of the nitrifying bacterium communities is finished. The enrichment culture method has the advantages that the available matrix range is wide, the culture is easy, the concentration of the cultured salt-tolerant nitrifying bacterium communities is high, the activity is good, the biochemical treatment removal rate of high-salt ammonia-nitrogen wastewater can be obviously improved, the enrichment culture method is suitable for the treatment of various ammonia-nitrogen industrial wastewater and is suitable for the scale production, the wastewater treatment cost is reduced, and good economic benefits and environmental benefits are realized.

The invention relates to an agricultural microbial compound bacterial fertilizer, in particular to a method for producing a microbial compound bacterial fertilizer. The method is characterized in that activated sludge fermented by a fermentation plant during sewage treatment is used as matrix, molasses is added into the matrix as a culture medium, compound bacteria are grafted into the culture medium after adding water to ferment, then grass carbon is added into the culture medium, and the mixture is dried to form the compound bacterial fertilizer. The method realizes reutilization of sludge waste, and provides economic and efficient microbial sludge bacterial fertilizer for the development of green ecological agriculture.

The invention discloses a method for biologically purifying municipal sewage and recovering useful resources. The method comprises the following steps of: 1) discharging excess sludge into a sludge activation tank to perform aerobic aeration; 2) discharging the activated sludge and the raw sewage into a sludge adsorption tank to perform aerobic aeration; 3) precipitating sludge-water mixed solution in a precipitation tank, putting supernatant into a sewage treatment system, purifying the supernatant, then discharging the sewage, and purifying the excess sludge circularly; 4) mixing the sludge at the bottom of the precipitation tank with the sludge in an anaerobic digestion tank to perform anaerobic fermentation; 5) converting an organic substance after the anaerobic fermentation into methane gas and recovering the methane gas; 6) discharging the supernatant into a crystallizing pond, adding a magnesium salt into the crystallizing pond, adjusting the pH value to ensure that the mixture is turned into guanite deposit, and recovering the guanite deposit; 7) putting the supernatant in the crystallizing pond into the sewage treatment system; and 8) discharging the excess sludge after the anaerobic fermentation. By using the excess sludge to treat the municipal sewage, the method not only solves the problems in sewage purification, makes use of pollutants in the sewage, but also realizes sludge disposal and extracts effective resources in the sewage.

The invention discloses a method of hydrogen production of biological cascade utilization on organic wastewater and relates to a method of producing hydrogen. The invention solves the existing problem of low conversion on biological hydrogen production with organic wastewater fermentation by using anaerobic activated sludge. The hydrogen production method of the invention is carried out as follows: firstly an anode chamber is in the anaerobic condition during startup procedure, anaerobic activated sludge is put into the anode chamber, the nutrient solution with pH value of 6.8 to 7.0 is introduced into the anode chamber, phosphate buffer is added into a cathode chamber, aeration is carried out in the cathode chamber in the previous 28 to 35 days of the startup procedure, startup is successful till the output voltage is continuously and steadily over 400 mV; secondly the organic wastewater is filled into the anode chamber from an inlet of the anode chamber and the organic wastewater is processed in the anode chamber, consequently hydrogen is obtained in the cathode chamber. The coulombic efficiency of the organic substrate conversion of the method reaches as high as over 80 percent, the electron transfer efficiency of transferring the cathode electron into hydrogen approaches to 100 percent, the purity of the hydrogen obtained in the cathode chamber in the entire process reaches 99.5 percent, the energy conversion efficiency of the entire process reaches over 80 percent, and the hydrogen yield calculated based on the input voltage is 288 percent.

A process for liquefying microorganisms present in biosolids, such as waste activated sludge, generated by municipal or industrial wastewater treatment plants is disclosed. The process includes the step of passing a slurry of the sludge at a high pressure through a nozzle having a restricted flow area to cause liquefication of the microorganisms as they are discharged from the nozzle. The pressure drop across the nozzle preferably exceeds 5,000 psi. At least part of the liquefied microorganisms may be recirculated to the treatment facility to feed nutrients to the wastewater treatment process. Optionally, the liquefied microorganisms may be anaerobically converted to methane and carbon dioxide. For optimum results, the sludge is subjected to pH adjustment and/or maceration prior to being pumped through the high pressure nozzle.

The invention discloses a pollution abatement method for a livestock and poultry farm. The method comprises the following steps of: separating feces from fence washing water and rain water at the source; carrying out solid-liquid separation on the feces and the sludge generated in each treatment procedure; conveying the separated liquid part to a plug flow anaerobic fermentation reactor or a liquid high-temperature aerobic fermentation reactor for liquid biological treatment, carrying out aerobic fermentation and filtration to get a liquid organic fertilizer; and conveying the separated solid part to a high temperature aerobic fermentation device, after fermentation, aging and deeply processing the solid part to get a solid organic fertilizer. Bad smell is exhausted after being processed in a biological deodorization filtering tower, and the filter material replaced from the biological deodorization filtering tower is considered as carbon source and conveyed to the solid aerobic fermentation device so as to be treated. Firstly, the fence washing water is treated by a grid impurity removal facility, after being treated by an SBR (Sequencing Batch Reactor Activated Sludge Process) biological reactor and medicated for flocculation and sedimentation, the fence washing water is drained after being purified by a wet land, or drained after being treated by aerobic fermentation reaction and filtering, and the sedimentary sludge and the solid substances under the grid fence are conveyed into a solid-liquid separation procedure so as to be treated. The method can be used for managing or beneficially using all the pollutants, and contributing the effort for establishing the resource-saving and environmentally-friendly society.