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2932 results about "Sludge dewatering" patented technology
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Sludge dewatering is the separation of a liquid and solid phase whereby, generally, the least possible residual moisture is required in the solid phase and the lowest possible solid particle residues are required in the separated liquid phase ("the centrate").
Neutral inorganic composite material for dehydration, solidification and modification of high water content sludge
ActiveCN101955345ASolving Alkaline ProblemsHigh compressive strengthSludge treatment by de-watering/drying/thickeningSolid waste managementHazardous substanceHigh water content
The invention discloses a neutral inorganic composite material for dehydration, solidification and modification of high water content sludge. The composite material comprises a powdery mixture consisting of the following components in part by weight: 100 parts of water hardened solidifying material consisting of hydrated gypsum and magnesium oxide, 80 to 120 parts of inorganic water absorption ash material, 20 to 40 parts of inorganic substance aid hardened material, 1 to 10 parts of high polymer coagulant and 1 to 5 parts of modifying functional agent. After being treated by the neutral inorganic composite material, the solidified sludge has high compressive strength; the pH of the lixivium is neutral, and meanwhile, harmful substances such as heavy metal and the like in the sludge can be effectively solidified; the treated sludge meets the requirement of landfill soil, soil for earthwork or soil for greening and farmlands; and the neutral inorganic composite material can be widely applied to the dehydration, solidification and modification of the high water content sludge such as sludge from waterworks, dredged bottom mud of rivers and lakes, residual building soil and the like.
Owner:江苏艾特克环境工程有限公司
Rotary annular crossflow filter, degasser, and sludge thickener
ActiveUS7757866B2Avoid emissionsImprove responseSludge treatmentLiquid degasificationImpellerDegasser
Owner:VORSANA INC
Ectopic classification leaching repair complete process of arsenic and heavy metal contaminated soil
ActiveCN104889149ASolve the regeneration problemSolve the recycling problemContaminated soil reclamationCyclonePrill
The invention discloses an ectopic classification leaching repair complete process of arsenic and heavy metal contaminated soil. The repair process comprises the following steps: the contaminated soil is magnetically separated to extract and recover target metals; a nonmagnetic component is divided into three grades by a vibrating screen after being primarily crushed; stones and boulders are flushed by clear water to directly serve as building materials; thick and fine soil particles obtained through screening respectively enter second-grade leaching mixing equipment for washing; the solid-liquid separation is performed for mud generated by washing through a two-stage hydraulic cyclone device; leaching waste liquid is purified and regenerated for recycling; sludge is added with such repair materials as curing / stabilizing agents for safety treatment after being dehydrated; and after the treatment, the soil particles can be backfilled, or can serve as roadbeds, building materials and the like. Based on the characteristic of large difference of arsenic and heavy metal contents in soils with different particle sizes, the soil leaching treatment according to the particle size is performed, so that the process has such advantages as low repair cost, high treatment efficiency and saving of energy consumption, provides a new method for soil heavy metal pollution abatement, and is broad in application prospect.
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS +1
Dewatering technology of mud and its device
InactiveCN1948192ADehydration fastReduce moisture contentSludge treatment by de-watering/drying/thickeningIt equipmentBiomedical engineering
The present invention relates to a sludge dehydration process and its equipment. Said equipment includes a mechanical filter pressing device, an ultrasonic quality-improving device, a pressure synergistic electroosmosis dehydration device and an adsorption dehydration material device. The cathode of the pressure synergistic electroosmosis dehydration device is placed at one side of sludge dehydration device, and its anode is placed at another side of sludge. Said ultrasonic quality-improving device is mainly composed of three portions of ultrasonic generator, ultrasonic convertor and ultrasonic contact. Besides, said invention also provides its working principle and concrete operation method and steps.
Owner:TIANJIN UNIV
Water-in-oil polymer emulsion containing microparticles
InactiveUS7531600B1Predictable and convenient and efficient preparationEasily metered into the fluid.Sludge treatment by de-watering/drying/thickeningWater treatment compoundsPolymer scienceFracturing fluid
A storage stable water-in-oil emulsion composition that includes 5% to 99% by weight of a water-in-oil emulsion polymer including a polymer or copolymer containing repeat units from an acrylamide monomer; 0.1% to 10% by weight of one or more inorganic microparticles; 0.5% to 90% by weight of a carrier solvent; and 0 to 90% by weight of a fluidizing agent. The compositions can be used to treat aqueous systems including paper processing, sludge dewatering and for fracturing fluids for subterranean formations.
Owner:KROFF CHEM
Advanced dyeing wastewater treatment and reclaimed water reuse system and method thereof
InactiveCN101525202ASimple processLow running costSludge treatment by de-watering/drying/thickeningTreatment with aerobic and anaerobic processesBiological activated carbonReclaimed water
The invention relates to an advanced dyeing wastewater treatment and reclaimed water reuse system and a method thereof. The system consists of a regulating tank (2), a coagulation tank (3), a preliminary sedimentation tank (4), an acidification hydrolysis tank (5), a deep well (6), a deaeration tank (7), a secondary sedimentation tank (8), a biological activated carbon tank (9), a sludge concentration tank (10), a sludge dewatering tank (11), a filter tank (12) and an ozone oxidation tank (13). The method comprises the following steps: wastewater is sent to the regulating tank, the coagulation tank and the preliminary sedimentation tank, then sludge is returned to the coagulation tank, excess sludge is discharged to the sludge concentration tank, clarified water flows to the acidification hydrolysis tank, is sent to a deep well aeration tank and then sent to the secondary sedimentation tank; and the obtained clarified water is discharged after meeting the standard, or flows to the biological activated carbon tank and is treated for production. The system and the method have the advantages of simple process, low operating cost, high stability and reliability, convenient operation, and realization of automation control. Most of the wastewater discharged is reused in production after the treated wastewater meets the standard, thus reducing emission of pollutants, being capable of eliminating environmental pollution resulting from the wastewater and protecting environment.
Owner:常州市东霞房地产代理有限公司 +2
Process for preparing hydrophilic dispersion polymers for treating wastewater
InactiveUS6025426ASludge treatment by de-watering/drying/thickeningWater/sewage treatment by flocculation/precipitationEmulsionPolymer science
Hydrophilic cationic copolymers of acrylamide are prepared as dispersions in a salt media. These polymers have high molecular weights and are readily activated by diluting in water. These polymers are useful flocculants for such applications as sludge dewatering, raw water clarification aids, emulsion breakers and waste water clarification aids.
Owner:ECOLAB USA INC
Synergistic composition and method for odor control
InactiveUS20060006121A1Improve dehydration effectEasy to controlSpecific water treatment objectivesWater/sewage treatment by neutralisationWaste streamVolatile fatty acids
A synergistic composition and method is provided for controlling odor from waste products. The composition comprises a combination of magnesium hydroxide and a sulfide-consuming compound. The method includes adding a sufficient amount of the composition to a waste stream to provide sufficient sulfide-consuming compound to effect immediate removal of sulfide. The composition incorporates a pH elevating and buffering compound, which both increases and buffers the pH. The increased pH serves to reduce both the volatile sulfide species and the volatile fatty acid (VFAs) species. The elevated pH also promotes the growth of naturally occurring bacteria which metabolize the sulfide to an innocuous form. Finally, addition of the composition drives the pH into a range where the growth of sulfide producing bacteria is inhibited. The mixture has surprisingly been found to be synergistic with respect to both control of chemical species that produce odors and corrosion of metals commonly found in sludge dewatering equipment.
Owner:SIEMENS WATER TECH CORP
Sludge-dewatering compound conditioning agent and application method thereof
ActiveCN102381828AAchieve deep dehydrationShorten spin timeSludge treatment by de-watering/drying/thickeningSludge treatment by oxidationPOLYMER SUBSTANCEFenton reagent
The invention provides a sludge-dewatering compound conditioning agent and an application method thereof. The sludge-dewatering compound conditioning agent comprises a Fenton reagent or / and similar Fenton reagent and a skeleton construct, and the weight ratio of the Fenton reagent or / and similar Fenton reagent and the skeleton construct is 1: (0.05-300); and the skeleton construct adopts a powder body. The application method comprises the following steps: adding the Fenton reagent or / and similar Fenton reagent into sludge slurry, and mixing for oxidation; and adding the skeleton construct into the sludge slurry with the Fenton reagent or / and similar Fenton reagent, and mixing. Due to synergy of the Fenton reagent or / and similar Fenton reagent and the powder type skeleton construct, extracellular polymeric substances in sludge can be destructed effectively, the compressibility of organic substances can be reduced, and the sludge dewatering performance of the sludge-dewatering compound conditioning agent can be improved greatly. The procedures of the application method are simple, the conditions can be controlled easily, the sludge dewatering time can be shortened, and the large-scale treatment of the sludge can be realized.
Owner:UNIVERSTAR SCI & TECH SHENZHEN +1
Reflux type temperature controllable sludge drying device and method
InactiveCN1587127AEfficient dryingSludge treatment by de-watering/drying/thickeningTemperature controlReflux
The present invention discloses one kind reflux type temperature controllable sludge drying apparatus and method. Drying sludge in 5-20 % is mixed with wet sludge and through the sludge inlet with two, one transverse and one longitudinal, layers of cutting steel wires, sludge is cut into small blocks before entering into the rotary kiln. Inside the rotary kiln, sludge is thrown and crushed by the throwing plate and chain for fast heating to dry in the temperature controlled with the jetting blower. Hot sludge from the rotary kiln is blown with the cold wind blower to further dry. The dried sludge is crushed and sieved, sludge with size below 4 mm is pelletized for comprehensive utilization and large sized sludge is refluxed. The present invention can reach ideal drying effect while maintaining over 95 % of its organic matter components.
Owner:ZHEJIANG UNIV
Method for circulating and reutilizing sludge during process of sewage
InactiveCN101074142ASolve processing problemsFungiSludge treatment by de-watering/drying/thickeningHuman wasteCompost
Treatment of refused pollutant is carried out by EC treating for sludge in sewage treatment plant, removing heavy metal, pesticides and antibiotics residues, entering into sludge dewatering apparatus to dewater, delivering dewatered sludge to air-drying farm to air dry, adding into additives to adjust N, P and K proportion in sludge, entering dried sludge into composting chamber to compost, transferring air to composing chamber, spraying water while timing agitating, adding into EM, fermenting, delivering manure mixture to livestock farm and feeding by earthworm. Earthworm's excrement can be used as biological organic fertilizer. It's cheap and economical.
Owner:上海荣禄投资管理有限公司 +1
Use Of Celluloses In Sludge Dewatering, And Sludge Products Thereof
InactiveUS20150197439A1Accelerates the dehydration processNon-macromolecular adhesive additivesInksParticulatesPrill
Methods to improve dewatering in industrial and municipal sludges are described. One method involves admixing sludge from a papermaking process and modified cellulose to provide modified sludge with the modified cellulose present in an effective amount to improve dewatering in the treated sludge, such as in allowing use of reduced amounts of coagulant and / or reducing dewatering times, increased dewatered volumes, and reduced sludge product moisture contents, and the like. The dewatered sludge may be formed into a dried particulate, and may be used as filler or other component of concrete, rubber, asphalt, plastics, resin-wood composite products, and other composite products.
Owner:BUCKMAN LAB INT INC
Sludge biological carbonizing technology based on hydrothermal reaction
ActiveCN102875005ALow running costImprove energy efficiencySludge treatment by de-watering/drying/thickeningSludge treatment by thermal conditioningPhysical chemistryCombustible gas
The invention discloses a sludge biological carbonizing technology based on hydrothermal reaction. The sludge biological carbonizing technology comprises the steps as follows: 1) dewatering the sludge, and transferring the sludge into a sludge pre-storage bin to be stored; 2) preheating the dewatered sludge; 3) transferring the preheated dewatered sludge into a hydrothermal reactor, thus obtaining hydrothermal lysis solution; 4) returning the hydrothermal lysis solution into a preheating system to preheat the dewatered sludge, and cooling the hydrothermal lysis solution so as to obtain a gaseous product; 5) transferring the cooled hydrothermal lysis solution into a filter press for filter pressing, thus obtaining a reacting filtrate and a solid product; 6) drying the solid product produced in previous step, and then transferring the solid product into a dry type carbonizing furnace to be carbonized, so as to obtain the solid biological carbon and other products, and transferring the other products into a gas-liquid separating device to be separated so as to obtain combustible gas and tar; and 7) transferring the gaseous product obtained in step 4) and the combustible gas and tar obtained in step 6) into a firebox to be burnt so as to generate heat; and supplying the generated heat to a hydrothermal reactor and the dry type carbonizing furnace. With the adoption of the sludge biological carbonizing technology disclosed by the invention, the product with high additional value can be obtained; and meanwhile, the energy can be saved.
Owner:GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
Soil washing restoration system based on reduction concentration design concept and method thereof
ActiveCN104475441AShort stayImprove production efficiencyContaminated soil reclamationSoil washingCompound (substance)
The invention discloses a soil washing restoration system based on a reduction concentration design concept and a method thereof. The washing restoration system comprises the following four module units which are sequentially connected with one another: a feeding and screening unit, an ore washing unit, a sludge dewatering unit and a tail-end sewage treatment recycling unit. The pollutants on the surface of coarse particles are eluted, transferred and concentrated into the filter-pressed mud cake by virtue of washing, so that pollutant-containing fine particles in contaminated soil can be effectively separated from crude particles such as gravel and grit. The repaired and discharged clean gravel and grit can be directly recycled to serve as building material. According to the system, purified water serves as a washing solution, so that secondary pollution caused by addition of a chemical washing agent is avoided, and the washing solution is treated by a tail-end sewage treatment system so as to be recycled. The reduction of remediation of contaminated soil is realized, the comprehensive repair cost is greatly reduced, the washed and discharged materials can be recycled, the contaminated soil is repaired, and a novel profit point is created.
Owner:BCEG ENVIRONMENTAL REMEDIATION CO LTD
Flocculating agent for sludge dewatering and sludge dewatering method
InactiveCN101367597AImprove rigidityImprove toughnessSludge treatment by de-watering/drying/thickeningAluminium chlorohydrateSewage
is the invention discloses a flocculating agent for filthy mud dehydration, which is composed of polyaluminium chloride and polyacrylamide. The flocculating agent addition is 4.92 percent to 10.18 percent by weight of the solid content of the filthy mud; and the polyaluminium is 4.38 percent to 5.33 percent by weight of the flocculating agent. The flocculating agent has the advantages of low specific impedance value of the filthy mud and high solid content of filter mass after dehydration. The method of filthy mud dehydration and the method of flocculating agent adding are as follows: polyaluminium chloride is added first, then is fast stirred at the speed of 32.0 r / m for two minutes and slowly stirred at the speed of 10.0 r / m for three minutes, and the pH value of sewage mud is regulated to 6 to 8; and the polyacrylamide is added, is fast stirred at the speed of 32.0 r / m for three minutes and then is slowly stirred at the speed of 10.0 r / m for seven minutes. The methods have the advantages that the flocculating agent can fully contact solid grains to facilitate the flocculating agent to trap colloid grains, so that the concentration distribution of the flocculating agent is uniform; large grains can not be stirred into small grains, precipitated grains can not be stirred into non-precipitated grains, so that the flocculation effect is improved.
Owner:广州中滔绿由环保科技有限公司
Deep dewatering method for sludge
InactiveCN102408178AImprove dehydration effectNo obvious foul smellSludge treatment by de-watering/drying/thickeningPathogenic bacteriaSludge dewatering
The invention discloses a deep dewatering method for sludge, which is characterized by comprising the following steps of: a. adjusting the pH value of condensed sludge to 2.5-3.5 by using an acid; b. adding molysite and then adding H2O2 or a peroxyacetic acid into the condensed sludge, and then stirring the obtained mixture rapidly; c. adding a framework material into the obtained sludge, and adjusting the pH value of the sludge to 6.8-7.2; and d. carrying out dewatering on the obtained sludge. The method disclosed by the invention has the advantages that adopted medicaments are cheap and easy to obtain; and after adjustment, the sludge has a degree of stability, pathogenic bacteria are killed, and the stench of the sludge is removed at the same time, therefore, the method facilitates the follow-up treatment of sludge.
Owner:SHANGHAI MUNICIPAL ENG DESIGN INST GRP
High efficiency sewage treatment method
InactiveCN1669956AThe three major indicators decreasedSave construction investmentMultistage water/sewage treatmentChemical treatmentWater quality
The invention provides a high efficiency sewage treatment method which comprises pre-processing, biological chemical treatment, deposition processing, deposition trash concentration disposal, and thick sludge dehydration treatment. By employing the biological method with anoxybiotic, anaerobic as the main steps and aerobic as the auxiliary step, the NH3-N, T-N and T-P in the sewage can be removed effectively, and the binding precipitant has very strong physical adsorption property.
Owner:昆明柯利欣环保科技有限公司
Soil ex-situ leaching system and method thereof
InactiveCN104874599AReduce processingAchieve reductionContaminated soil reclamationElutionPhysical separation
The invention relates to a soil ex-situ leaching system and a method thereof. The system is mainly composed of a soil pretreatment unit, a physical separation unit, a synergistic elution unit, a wastewater treatment and recycling unit and a control unit which are arranged successively. The method mainly comprises the following processes: soil pretreatment, soil separation stage-treatment, direct elution or synergistic elution treatment, entry to a sludge dewatering system, and corresponding treatments of mud cake based on pollution properties. By the technical scheme, soil containing heavy metal, semi-volatile organic pollutants and non-volatile organic pollutants can undergo leaching treatment. In addition, leaching cost per unit area is low, treatment period is short, and operating maintenance and monitoring are convenient.
Owner:JIANGSU GAIYA ENVIRONMENTAL SCI & TECH CO LTD
Sludge dehydrating and drying process method and device
InactiveCN101823825AGood effectLow costSludge treatment by de-watering/drying/thickeningEnergy based wastewater treatmentAutomatic controlSlag
The invention belongs to the technical field of environmental engineering, in particular to a sludge dehydrating and drying process method and a device. The technical essential points of the invention are that: firstly, adding one or several of fly ash, fine manganese slag, calcined lime, ferric chloride solution and aluminum sulfate solution into sludge and dehydrating and conditioning the sludge; secondly, feeding the sludge into a pre-drying area and simultaneously adding a certain amount of calcined lime, potassium permanganate and finished product of dry sludge and uniformly mixing; feeding the sludge treated in the pre-drying area into a hollow paddle spiral indirect dryer; returning one part of finished product of dry sludge to the pre-drying area and carrying out drier back-mixing with wet sludge; supplying saturated heated steam to a drier by an electric boiler; and introducing steam tail gas from the drier to the pre-drying area for heating the wet sludge. The device is automatically controlled by a control center through a control bus. The process has the advantages of energy saving, environmental protection and high efficiency.
Owner:HUNAN UNIV OF SCI & TECH
Grafted copolymerized cationic polysaccharide bioflocculant and preparation method thereof
ActiveCN104130351AImprove adsorption capacityHigh positive charge densityWater/sewage treatment by flocculation/precipitationMethacrylateSodium bisulfate
The invention relates to a grafted copolymerized cationic polysaccharide bioflocculant and a preparing method thereof. A product with the cationic degree (DC) of 3-63% is finally prepared through an aqueous solution polymerization technology with a present nonionic polysaccharide bioflocculant (Dx) as a raw material, one or more of dimethyl diallyl ammonium chloride (DMDAAC), methacryloxyethyltrimethyl ammonium chloride (DMC), acryloyloxyethyltrimethyl ammonium chloride (DAC), dimethylaminoethyl methacrylate (DMAEMA), dimethylaminoethyl acrylate (DMAEA) as a monomer, and one or two of ammonium persulfate / sodium bisulfate and dibenzoyl peroxide (BPO) (AIBA) as an initiator. The preparation method is simple, and is easy to control, and the product obtained in the invention has good flocculation effect and high treatment efficiency, and can be widely used in the field of treatment various sewages, the sludge dewatering field and the like.
Owner:威海汉邦生物环保科技股份有限公司
Power plant wastewater zero-discharge treatment technique
ActiveCN104276708AImprove flushing effectRemove supersaturationMultistage water/sewage treatmentWater/sewage treatment by flocculation/precipitationProcess equipmentDegasser
The invention discloses a power plant wastewater zero-discharge treatment technique which comprises a pretreatment process, an evaporative concentration process and an evaporative crystallization process, wherein the pretreatment process equipment comprises a precipitation and concentration tank, a sludge dewatering machine, and a raw water precipitation tank, a primary softening reactor, a secondary softening reactor and a softening precipitation tank which are sequentially connected; the evaporative concentration process equipment comprises an automatic back flush filter, a plate-type preheater, a degasser and a falling film evaporator which are sequentially communicated; and the evaporative crystallization process equipment comprises a concentrated solution tank, a crystallizing heater and a crystallizer which are sequentially communicated. The desulfurization water treatment technique is reasonable in step design and performs the pretreatment, evaporative concentration and evaporative crystallization on the desulfurization wastewater, and the end products are only distilled water and crystalline salt, thereby reducing the discharge of the harmful substances, lowering the energy consumption and implementing the goal of zero discharge of desulfurization wastewater.
Owner:JIANGSU JINGYUAN ENVIRONMENTAL PROTECTION
Apparatus and method for entire journey autotrophy denitrification of digested sludge dewatered liquid biomembrane
ActiveCN101293707AImprove nitrogen removal efficiencyReduce inhibitionTreatment with aerobic and anaerobic processesMonosodium glutamateToxic material
The invention relates to a biofilm full-rang autotrophic nitrogen removal device of digested sludge dehydrolysis liquid and a method thereof; wherein, the device is provided with a digested sludge dehydrolysis liquid pool, a pre-hypoxia denitrification pool, a short-range biofilm nitrification pool, a sedimentation pool, an intermediate pool and a biofilm anaerobic ammonia oxidation pool; the method consists of the following steps: 1. the pre-hypoxia denitrification pool and the short-range biofilm nitrification pool are started to operate; 2. the biofilm anaerobic ammonia oxidation pool is started; 3. the biofilm full-rang autotrophic nitrogen removal system of the digested sludge dehydrolysis liquid is operated in series. The device is suitable for biological nitrogen removal of wastewater containing high ammonia nitrogen, such as the digested sludge dehydrolysis liquid, late landfill percolate, coking wastewater, monosodium glutamate wastewater, etc. The device realizes efficient biological nitrogen removal of wastewater with high NH4<+>-N and low ratio of C / N, greatly decreases the construction and operation cost of nitrogen removal of wastewater, reduces alkalinity demand of the nitrification, runs stably, operates easily and has stronger shock resistance loading capability; meanwhile, the device is strongly adaptable to temperature fluctuation and toxic substances, which is easy to recover after being restrained.
Owner:BEIJING DRAINAGE GRP CO LTD +1
Method for innocent treatment of bottom oil sludge, scruff and active sludge in petro-chemical industry
InactiveCN101343137ASave resourcesReduce pollutionSludge treatment by de-watering/drying/thickeningIncinerator apparatusChemical industryActivated sludge
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.
Owner:罗德春
Method for conditioning and dehydrating residual sludge
ActiveCN103030259APromote moisture penetrationImprove dehydration effectSludge treatment by de-watering/drying/thickeningPolymer dissolutionBiological cell
The invention relates to the technical field of residual sludge treatment, in particular to a process method for conditioning and dehydrating residual sludge. The method particularly comprises the following steps: (1) adding acid into the residual sludge to be treated and with the water content of 90 to 95 percent and adjusting until the pH value is between 4.0 and 6.0; (2) adding quaternary ammonium salt cationic organic matters into the conditioned sludge in the step (1) and performing hybrid reaction; (3) adding a dehydration aid into the conditioned sludge in the step (2) and stirring uniformly; and (4) adding coagulant into the conditioned sludge in the step (3) and mechanically dehydrating after mixing and stirring. The extracellular polymers on sludge flocs are stripped and partially hydrolyzed by a chemical conditioning mode, microbial cells are dissolved, a large amount of bound water is released, and the water permeability of the sludge is improved by utilizing the aid, so that the dehydration performance of the sludge is integrally improved, the water content of the sludge is reduced, the dehydration time is shortened and the dehydration cost is reduced.
Owner:北京方兴科创环境科技有限公司
Composition Containing Amphoteric Water-Soluble Polymer
InactiveUS20080230193A1Improve filtration rateExcellent peelabilityNatural cellulose pulp/paperSpecial paperFlocculationPolymer science
An object of the present invention is to provide a composition excellent in various flocculation performances for various sludge and papermaking systems, especially excellent as a polymer flocculant, and provide a sludge-dewatering agent excellent in dewatering performances for various sludge, especially excellent in flocculationability, as well as a retention aid which can realize a high retention and ensure excellent formation of paper and which is easy to use.A composition is provided, which comprises two or more amphoteric water-soluble polymers in combination shown below, the polymers being obtained by polymerizing a cationic radical-polymerizable monomer and an anionic radical-polymerizable monomer in a presence of a polysaccharide.1. A combination of a polymer satisfying the molar ratio of the cationic radical-polymerizable monomer to the anionic radical-polymerizable monomer (hereinafter referred to as Ca / An) of Ca / An≧1, and a polymer satisfying Ca / An<1, or2. a combination of two kinds of polymers satisfying Ca / An≧1.
Owner:TOAGOSEI CO LTD
Inorganic composite conditioner and sludge dewatering method thereof
InactiveCN101397181APlay a role in coagulationDestabilizingSludge treatment by de-watering/drying/thickeningFly ashToxic industrial waste
The invention discloses an inorganic composite conditioner and a method for dehydrating the sludge thereof. The inorganic composite conditioner for dehydrating sludge comprises fly ash and calces, wherein, the weight percent of the fly ash is 17-75%, and the left is calces. For the optimized improvement, the weight percent of fly ash is 37.5-64%. The dehydration method comprises the following steps: (1) adjusting quality: the inorganic composite conditioner with right amount is weighted and is added in the sludge for evenly stirring, and the weight percent of the added inorganic composite conditioner is 6-20%; (2) dehydration: the sludge mixing liquid which is stirred evenly after adjusting quality is dehydrated mechanically. The water content rate of mud cake after dehydrating the sludge can be decreased to 45-60%. The specific resistance of the sludge is decreased to 10<6>-10<7>S<2> / g. The beneficial effects of the invention are that the effect of dehydration is good, time of dehydration is short, industrial waste residue can be utilized effectively, after dehydration, the mud cake can be taken as the raw material for preparing construction material.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for simultaneously stabilizing heavy metals and deeply dewatering municipal sludge for municipal sludge
InactiveCN103073166AReduce quality problemsReduce the use effectSludge treatment by de-watering/drying/thickeningStable stateClay minerals
The invention relates to a method for simultaneously stabilizing heavy metals and deeply dewatering municipal sludge for municipal sludge. The method comprises the step of: adding a certain amount of ferrite, lime, clay minerals and / or apatite in municipal sludge. Form of heavy metals in municipal sludge treated by the method is transformed to a stable state, so that the leaching concentration of heavy metal pollutants is reduced, and the heavy metal pollutants can be quickly and effectively sealed and stored stably. Meanwhile, the municipal sludge can be conditioned, so the dewatering performance is remarkably improved, the dewatering efficiency of sludge is extremely improved, and the moisture content is reduced for convenience of subsequent treatment and reduction of cost. The method is an efficient and novel treatment method which can obtain a good economic benefit.
Owner:上海环境保护有限公司
Sludge dewatering agent and dewatering method thereof
InactiveCN101100345AFast dehydrationImprove dehydration effectSludge treatment by de-watering/drying/thickeningIron saltsOrganic matter
This invention discloses a waste-sludge dewatering agent. It contains (by the weight of the water content in waste-sludge being treated) of: iron salt 1-3%; ion-dispersing agent with surface-activity 1-5%; granular matter 3-6% and the rest water 60-70%. This inventive dewatering of waste-sludge method is also a waste-sludge temperament method, comprises procedures of: adding water into said sludge, agitating for 1-3 minutes; adding iron salt and reacting, during agitating, for 2-6 minutes; adding ion-dispering agent and reacting, during agitating, for 2-8 minutes; adding granular matter and reacting, during agitating, for 2-6 minutes. This inventive method for dewatering of waste-sludge has advantages of: fast dewatering, excellent results and no reducing of organic matters during this dewatering process.
Owner:GUANGZHOU PUDE ENVIRONMENTAL EQUIP
Extrusion type sludge rapid dehydration device
InactiveCN107129128AImprove the extrusion effectRapid dehydrationSludge treatment by de-watering/drying/thickeningInsertion stentFiltration
The invention discloses an extrusion type sludge rapid dehydration device, which comprises a right support column, a support top plate, a left support column, a filter box, a press filter box, a first connecting rod, a second connecting rod, a lead screw, and a water filtering bottom plate , Sewage collection box, lower pressure plate and sludge collection box, the two ends of the support top plate are fixed and welded on the top of the right support column and the top of the left support column respectively, the filter press box is fixed and welded on the end of the bracket, and the filter box is fixed It is erected on the upper outer wall of the left support column, and the filter screen is fixed in the middle cavity of the filter box. The middle cavity of the filter box is connected with the middle cavity of the filter press box through the sludge conveying pipeline. An upper pressing plate and a lower pressing plate are arranged to slide up and down in the inner cavity, and the upper pressing plate and the lower pressing plate are connected by several extension springs. The invention has the advantages of simple structure, convenient use and convenient operation, can rapidly dehydrate the sludge, has good dehydration effect, high speed and high popularization value.
Owner:CHANGSHA WUDAO IND DESIGN CO LTD
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