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318 results about "River sediment" patented technology
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All rivers contain sediments: a river, in effect, can be considered a body of flowing sediments as much as one of flowing water. When a river is stilled behind a dam, the sediments it contains sink to the bottom of the reservoir.
River sediment sampler
The invention relates to a river sediment sampler, which comprises a fixed grab bucket, a movable grab bucket, a movable rod, a prolonging rod and a handle, wherein a connecting rod of the fixed grab bucket is connected with an operating handle through the prolonging rod; the movable grab bucket is fixed on the connecting rod of the fixed grab bucket through a hinge; the grab bucket part of the movable grab bucket is fixedly connected to the connecting rod of the fixed grab bucket through a tension spring; and the movable rod is connected through a pulling rope, rounds a movable pulley and then is fixed on the handle. The sampler has the characteristics that: the sampler is portable and convenient to use; the requirement of conventional pollutant monitoring index can be met; the sampling efficiency is greatly improved; the original performance of sediment can be maintained; the sampling depth can be controlled; no material consumption exists and the like. The sampler better meets the requirements of water environment investigation sampling, and has better popularization and use prospect.
Owner:NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
Preparation method of ceramsite filter material for water treatment
The invention provides a preparation method for a ceramsite filter material for water treatment. The method is characterized by comprising the following steps: (1) mixing Bayer red mud powder in aluminum manufacturers in Shangdong province, river sediment powder in Xiaofu River at the section of Huangtuya in Zibo city of Shangdong province, gangue powder and a pore forming agent according to a mass ratio of 40-50:40-50:0-5:5-10 to obtain a mixture; (2) putting the mixture into a pan granulator and adding water, the mass of which is 20 to 25% of the mixture, for granulation into spherical particles with phi being 3 to 10 mm; (3) sintering and cooling the spherical particles after drying so as to obtain the ceramsite filter material. According to the invention, Bayer red mud powder in aluminum manufacturers in Shangdong province and river sediment powder in Xiaofu River at the section of Huangtuya in Zibo city of Shangdong province are used as the main raw materials and added at an equal or substantially equal amount, and a small amount of the pore forming agent is blended for the preparation of the ceramsite filter material; therefore, low cost is realized, the problem of flood passage capability of rivers is overcome, and environment pollution and land occupation caused by accumulation of Bayer red mud are simultaneously eliminated.
Owner:SHANDONG UNIV OF TECH
Method for using purified water sludge as severely-polluted river sediment masking agent
InactiveCN102775030AWide variety of sourcesAchieve reuseWater resource protectionSludge treatment by de-watering/drying/thickeningParticulatesEcological environment
The invention discloses a method for using purified water sludge as a severely-polluted river sediment masking agent. The method comprises: a purified water sludge regeneration step that purified water sludge is burned to remove organic matters, microbes and the like in the purified water sludge to make the purified water sludge treat inorganic minerals comprising aluminum oxide and the like as main components; and a severely-polluted river restoration step comprising that the regenerated purified water sludge is covered on polluted sediments of water to be restored to physically separate the polluted sediments from covered water in order to inhibit the release of polluted sediment endogenous pollutants to the water, make polluters of nitrogen, phosphorus and the like in the water be absorbed by inorganic particulate substances treating metal oxides as main components and contained in the purified water sludge, and accelerate the migration of the polluters in the water to the sediments. According to the method, the resource utilization of an aluminum resource in the purified water sludge can be realized, the harmless treatment of the purified water sludge is realized, and the water restoration is completed without destroying the ecological environment of the water.
Owner:SUZHOU UNIV OF SCI & TECH
Method for preparing environment friendly ceramic gaged brick by Yellow River sediment
The invention belongs to the technical field of building materials, and provides a method for preparing an environment-friendly ceramic plain brick by sediment of the Yellow River. The method is characterized by comprising the following: 1) a step of blank preparation, in which, the sediment of the Yellow River is dug up from riverbed, and is deposited for more than 10 years to be deposited sediment of the Yellow River; the blank comprises the following compositions in weight percentage: 60 to 80 percent of the deposited sediment of the Yellow River, 5 to 10 percent of pulverized fuel ash, 5 to 10 percent of coal refuse, 5 to 10 percent of fluxing agent, and 5 to 10 percent of grog refractory; the compositions are selected for standby; water is added to the mixture for mixing and stirring, wherein the amount of the water is 20 to 22 percent of gross weight of the deposited sediment of the Yellow River, the pulverized fuel ash, the coal refuse, the fluxing agent and the grog refractory; mud is milled by a vacuum pugmill, and is cut into mud cakes; after the mud cakes are aged for 3 days, the blank is produced for standby; 2) a step of glaze preparation; 3) a step of shaping; 4) a step of glazing; 5) a step of drying; and 6) a step of maturing, thereby producing the environment-friendly ceramic plain brick with water content ratio of between 6 and 8 weight percent. The plain brick prepared by the method has the characteristics of high regularity, high strength and strong decoration, and can be directly used for walls bricklaying without external decorating.
Owner:WUHAN UNIV OF TECH
Integrated apparatus for researching sediment sampling and laminated gradient
InactiveCN101441207AStructural damage is smallKeep the original shapeEarth material testingBiological propertyLight irradiation
The invention provides an integrated device for sampling and layered-gradient research of lake or stream sediments, mainly comprising a sampling and layered-gradient research integrated tube, a constant-temperature lighting system, an exchange system for inlet water and outlet water, a dissolved oxygen control system, an online monitoring system, and a hydropower disturbance system. The invention has the advantages that the sampling tube and the layered-gradient research device are integrated into a whole, thus reducing the artificial disturbance as much as possible to keep the original characters of overlying water and sediments; and the real-time, layered, and non-disturbance observation and sampling can be realized by using the sediment simulator. The device of the invention can be applicable to the research on the change rules of physicochemical characteristics and biological properties of sediments and overlying water in various layers under the condition that the aquatic environment, like simulation temperature, light irradiation, and water body exchange, varies.
Owner:ZHEJIANG UNIV
Filling reclamation method for reclaiming coal mining subsidence lands by Yellow River sediment
ActiveCN103283335AGuarantee the source of covering soilDrain fastSoil lifting machinesSoil-working methodsPondingSoil depth
The invention relates to a filling reclamation method for reclaiming coal mining subsidence lands by Yellow River sediment and belongs to the technical field of mine environment protection. The filling reclamation method includes: confirming trends and sizes of Yellow River sediment filling strips according to the sizes and the shapes of a subsided basin to be filled; draining accumulated water in the subsidence land via existing drainage ditches around the subsidence land, and building a field path and drainage ditches along the vertical filling trend in the central area of the subsidence land; confirming the soil stripping depth of every strip according to the sediment depth, the available soil depth and reclamation elevation of every strip to be filled, stripping surface soil from subsoil in a strip-separated and layered stripping manner, and piling the surface soil and the subsoil on two sides of every strip; filling along a direction from two ends of the strips perpendicular to the central drainage ditches to the drainage ditches, covering the strips by the subsoil and the surface coil sequentially in a reasonable thickness after drainage consolidation of the filled sediment, and finally leveling the land to form a reconstructed soil profile. The filling reclamation method provides technical supports for filling reclamation of the coal mining subsidence lands by the Yellow River sediment.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)
River sediment in-situ remediation method
InactiveCN101224940ALow costConstruction is progressing rapidlySludge processingBiological sludge treatmentIn situ remediationSelf purification
The invention discloses an in-situ remediation method of sediment in rivers, which comprises the steps that: (1) aboriginal microorganism liquid, biological growth stimulation liquid and biological detoxification liquid are fully mixed according to a weight ratio of 8-10: 0.8-1.5: 0.8-1.2; (2) a spray hopper gun or an injection method is adopted to inject the mixed liquid obtained in step (1) to the bottom of the sediment in rivers and the concentration of the aboriginal microorganism liquid is 0.010 multiplied by 10<-6>- 0.015 multiplied by 10<-6>g / m<3>; (3) after 5-7 days, the biological growth stimulation liquid is injected into the sediment in rivers each day and the weight of the biological growth stimulation liquid is the same with the weight of the mixed liquid in step (1); then the biological growth stimulation liquid is injected in a halved amount each day for 25-30 days. The method of the invention has good treatment and remediation effect, simple operation and little influence on normal municipal administration and the life of residents. A river flow aerobic self-purification ecological system established can keep persistent good state; good conditions are created for the establishment of the river flow aerobic self-purification ecological system so as to completely eliminate malodorous black river.
Owner:广州市净水有限公司
Floating-bed plant coupling sediment microbiological fuel cell water purification method
InactiveCN105236576AReduce the content of organic matterReduce pollutionWater resource protectionWater contaminantsCarbon feltCathode
The present invention relates to a microbial fuel cell water purification method, particularly to coupling of ecological floating islands and microbial fuel cells, wherein the method can be used for ecological restoration of contaminated river courses, lakes and parks, residential districts and other landscape water bodies, and belongs to the water body pollution remediation in environmental projects. According to the present invention, the black and odor river sediment or city sludge is adopted as the bottom matter, the carbon felt is adopted as the anode, and the graphite disc is adopted as the cathode to construct SMFC; floating-bed plants are introduced, and are planted on the overlying water body by using the floating body to form the floating-bed plant-sediment microbiological fuel cell (P-SMFC); with the combination of the floating-bed plant root system secretion characteristics, the root system secretions provide nutrients for the rhizospheric microorganisms; and the root system radially secretes oxygen to make the rhizospheric zone form a lot of aerobic zones, and the oxygen secreted by the plant root zone can spread to the SMFC cathode, such that the cathode region dissolved oxygen concentration is increased, and the restoration performance of the SMFC on the sediment pollution and the overlying water pollution are improved.
Owner:SOUTH CHINA UNIV OF TECH
Breeding method for anaerobic ammonium oxidation granular sludge
InactiveCN102190371AEfficient removalReduce startup timeWater contaminantsTreatment with anaerobic digestion processesSequencing batch reactorActivated sludge
The invention discloses a breeding method for anaerobic ammonium oxidation granular sludge. The breeding method comprises the following steps that: (1), municipal domestic wastewater with a low organic carbon concentration is utilized as feed water and NaNO2 is added into the feed water; (2), anaerobic digested sludge, honeycomb stone particles, black and smelly river sediment and aerobic activated sludge are added orderly into an anaerobic sequencing batch reactor (ASBR) and are mixed well; (3), the feed water is fed into the ASBR through a peristaltic pump to undergo a reaction for at least 78 days under conditions of shading and sealing and then tawny granular sludge as an objective product is obtained, wherein removal rates of ammonia nitrogen and nitrite nitrogen are over 92%. Through utilizing seed sludge widely available, the breeding method of the invention realizes that waste is treated by wastes; sludge granulation time and anaerobic ammonium oxidation reactor starting timeare reduced; and ammonia nitrogen is removed efficiently.
Owner:EAST CHINA NORMAL UNIV
Method and system for remediation and treatment of polluted river water
ActiveCN102464404AHighly stable controlControl altitudeWater resource protectionTreatment with anaerobic digestion processesAnaerobic treatmentInoculation
The invention discloses a method and a system for remediation and treatment of polluted river water. The method comprises the following steps that a river way is separated so that a composite anaerobic treatment segment is formed; a sediment stirring device is installed in the composite anaerobic treatment segment; a filling material is arranged at an upper part of the composite anaerobic treatment segment; river sediment is stirred by the sediment stirring device, then suspends and fully contacts with polluted river water from a lower part of the composite anaerobic treatment segment, wherein original indigenous microorganisms in the river sediment can effectively degrade pollutants in the polluted river water; the polluted river water with a part of the river sediment flows upstream, contacts with the filling material, and then is subjected to inoculation enrichment on the filling material so that a biomembrane is formed; the polluted river water is subjected to further treatment to form product water; and product water obtained by the method can be subjected to further aerobic and ecological remediation treatment and is discharged. The method and the system for remediation and treatment of polluted river water can obviously decrease a river sediment amount, can realize effective degradation of various pollutants in river water, and have the advantages of environmental friendliness, safety and good effectiveness.
Owner:中广信(福建)环保投资有限公司
Composite bio-energizer used for in-situ ecological remediation of polluted river sediment
InactiveCN102815794ACause ecological riskImprove repair effectWater resource protectionBiological water/sewage treatmentMicroecosystemSludge
The invention discloses composite bio-energizer used for in-situ ecological remediation of polluted river sediment. The composite bio-energizer comprises oxidant and bio-energizer. The oxidant is one or two of calcium peroxide or calcium nitrate. The bio-energizer comprises amino acid, micro-molecular organic acid, vitamin, inorganic salt and microelement. According to the characteristics of bottom sludge in a river, oxidant and bio-energizer compositions are obtained by screening, matching quality of the oxidant can be adjusted according to pollution level of the bottom sludge in the river, and ecological risk cannot be caused to the bottom sludge due to absence of microorganism. In addition, growth and reproduction of indigenous microorganism are achieved by stimulating the bottom sludge, a pollution-resistant bottom sludge micro-ecosystem is established, and remediation effect of the bottom sludge can be kept excellent for a long term. An experimental research shows that by the use of the composite bio-energizer, content of TOC (total organic carbon) in the bottom sludge can be reduced, and diversity and activity of microorganisms are increased.
Owner:SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
Water body heavy metal polluted sediment in-situ covering and repairing method
ActiveCN106673384APollution Elimination or ReductionEasy to recycleWater contaminantsFixation/solidifcation sludge treatmentActivated carbonStructure of the Earth
The invention discloses a water body heavy metal polluted sediment in-situ covering and repairing method. The water body heavy metal polluted sediment in-situ covering and repairing method is characterized in that at least one layer of a first covering layer, a second covering layer and a third covering layer is sequentially arranged on polluted river sediment or a river slope from bottom to top; filler in the first covering layer is a mixture of cerium modified zeolite and zero-valent iron; filler in the second covering layer is selective heavy metal curing filler; filler in the third covering layer is mixed filler of activated carbon and sand; a water body can be divided into a shallow water slow flowing water body, a deep water body and a torrent water body according to the depth and the flowing speed of the water body by the three covering layers, and the shallow water slow flowing water body, the deep water body and the torrent water body can be selectively combined. The water body heavy metal polluted sediment in-situ covering and repairing method disclosed by the invention aims at different sediment pollution situations; a covering body combines physical, chemical and biological repairing measures together through a way of stacking different structure layers up and down, so that sediment pollution is efficiently removed or reduced, and the covering layers and heavy metals adsorbed thereby can be well recycled.
Owner:SHANDONG JIANZHU UNIV
Liftable rotating aeration device for strengthening river sediment oxygen enrichment
ActiveCN106517499AGuaranteed StrengthEvenly aeratedWater treatment compoundsWater aerationAir pumpCheck valve
The invention discloses a liftable rotating aeration device for strengthening river sediment oxygen enrichment. The liftable rotating aeration device is characterized in that a solar photovoltaic power generation system and a storage battery form a power supply system; the power supply system can supply power to an aeration pump during daytime and nighttime; the aeration pump is connected with a rotating aeration disc; the aeration disc is of an oblate bottomless shell structure; the aeration disc and a conical body vertically arranged at the center of the circle center of the aeration disc form an integral body; a check valve is arranged inside the conical body; the rotating aeration disc is made from PTFE; the waterproofness is high and the mechanical loss is small; a rotating impeller and grids / diversion holes are further arranged inside the rotating aeration disc; the head loss is small; when the aeration pump is started, the rotating aeration disc operates, air is uniformly diffused to the sediment surface layer in a service region in a spiral manner, the sediment oxidation reduction electric potential is remarkably improved, and anaerobic odors are effectively controlled; and during the intermittent period, the aeration disc can be floated upwards to be maintained. The liftable rotating aeration device can be further combined with other ecological floating beds, the application range is wide, and the liftable rotating aeration device is utilized in a water body for a long time to guarantee self-cleaning capacity of the water body and strengthen river sediment oxygen enrichment.
Owner:TIANJIN UNIV
Integrated treatment process and equipment for river sediment dredging and residual water
InactiveCN102295371AEfficient killingReduce pollutionWater/sewage treatment by centrifugal separationMultistage water/sewage treatmentRapid processingWater flow
Owner:TONGJI UNIV
Plaster-base cyanobacteria treating agent and preparation method thereof
InactiveCN104591345AImprove adsorption capacityEfficient removalWater/sewage treatment using germicide/oligodynamic-processWater/sewage treatment by sorptionAluminium chlorideAdjuvant
The invention discloses a plaster-base cyanobacteria treating agent. The plaster-base cyanobacteria treating agent of the invention is characterized by comprising the following raw materials in parts by weight: 10-15 parts of semi-hydrated gypsum, 10-15 parts of palygouskite, 5-10 parts of water hemp peel powder, 3-5 parts of lithium magnesium silicate, 3-5 parts of potato starch, 2-4 parts of aluminium chloride, 1-2 parts of malic acid, 3-5 parts of balloonflower powder, 1-2 parts of xanthan gum, 1-2 parts of magnesium chloride, 1-2 parts of aluminium sulfate and 10-15 parts of modifying adjuvant. The cyanobacteria treating agent can not only effectively adsorb and remove cyanobacteria in water, but also eliminate organic substances, nitrogen, phosphorus and heavy metals. The treating agent is characterized by abundant raw material source, low cost, good economical efficiency as well as excellent environment compatibility. The plaster-base cyanobacteria treating agent of the invention is free of environment pollution and is capable of effectively cleaning up water and river sediment so that the treating agent has strong practicality.
Owner:安徽省中日农业环保科技有限公司
Resource utilization method of residual sludge from petrochemical organic wastewater biological treatment
InactiveCN103553702AWith "turning waste into treasure"Turn waste into treasureFiltration separationCeramic materials productionSludgeResource utilization
The invention discloses a resource utilization method of residual sludge from petrochemical organic wastewater biological treatment (shortened form as petrochemical residual sludge). Provided is a method for preparing a spherical lightweight water treatment filter material by mixing raw materials of petrochemical residual sludge, river sediment, coal ash, civil construction waste glass and clay according to a certain proportion. The filter material comprises the following components by weight: 10-20% of petrochemical sludge, 20-30% of fly ash, 30-50% of river sediment, 10% of waste glass powder, 0-25% of clay and water accounting for 25-30 wt% of the raw materials. The materials are subjected to granulation, drying and high temperature sintering in order. The obtained filter material has physical and chemical performance indexes reaching the requirements of CJ-T299-2008 criteria for artificial ceramsite filter for water treatment. The raw materials used in the invention are solid wastes in a large amount; and the method has the advantages of wide material source, simple preparation process and high added value of products. In addition, the petrochemical residual sludge and river sediment have high organic matter content and high calorific value, so as to save the fuel consumption in the sinter process and contribute significantly to energy saving and emission reduction.
Owner:CHANGZHOU UNIV
Method and system for carrying out sediment dredging and ectopic treatment on seasonal river heavy metal pollution
ActiveCN104803572ATargeted solutionShow systematicSludge treatment by de-watering/drying/thickeningMultistage water/sewage treatmentResource utilizationTherapeutic effect
The invention relates to a method and a system for carrying out sediment dredging and ectopic treatment on seasonal river heavy metal pollution. The method comprises the following steps: (1) carrying out status survey; (2) dividing unit projects and arranging a diversion channel; (3) building a riverway sediment storage tank and an accident sediment storage tank; (4) carrying out project dredging; (5) carrying out quenching and tempering treatment on the sediment conveyed to the shore; (6) after quenching and tempering treatment, carrying out mud-water separation on the sediment; (8) screening the slurry obtained after mud-water separation; (9) carrying out resource utilization; (10) treating tail water; (11) stably solidifying and mixing the sediment; (12) carrying out stable solidification treatment. The system comprises a river sediment dredging system and a shore sediment treatment system. The method and the system are convenient to implement and operate, have higher pertinence and good treatment effect, and do not cause secondary pollution.
Owner:山东省环科院环境工程有限公司
Preparation method for producing lightweight ceramisite from sewage sludge and river sediment through firing
A preparation method for producing lightweight ceramisite from sewage sludge and river sediment through firing relates to a preparation method of ceramisite. The method solves the problems of high cost, high density of sintered ceramisite, high water absorption, high hydrochloric acid solubility and low raw material utilization ratio in the preparation of ceramisite. The method comprises the following steps of: 1. drying the sewage sludge and the river sediment; 2. crushing the dried sewage sludge and river sediment, respectively; 3. mixing the crushed sewage sludge particles with the crushed river sediment particles, thereby obtaining a dry mix; 4. mixing an additive and water with the dry mix and then performing extrusion forming on the mixture, thereby obtaining a ceramisite blank; and 5. putting the ceramisite blank in a muffle furnace for sintering, thereby finishing the preparation of the ceramisite. The preparation method has the following advantages that: the sewage sludge and the river sediment are taken as raw materials, so that secondary pollution is effectively prevented and recycling of the sludge and the changing of waste material into things of value are realized; the shortcoming of high cost in ceramisite preparation is overcome; and water glass is further added so that the lightweight ceramisite is high in strength and low in density, and has the advantages of low water absorption, low hydrochloric acid solubility and the like.
Owner:HARBIN INST OF TECH
Alternate, multilayer and repetitive filling soil reconstruction method by using Yellow River sediment in reclamation of coal mining subsidence land
ActiveCN105248007APromote growth and developmentRipe fastWater resource protectionSoil-working methodsSoil scienceReconstruction method
The invention relates to an alternate, multilayer and repetitive filling soil reconstruction method by using Yellow River sediment in reclamation of a coal mining subsidence land, and belongs to the technical field of mine environment protection. The method comprises the steps of determining soil stripping thickness of a coal mining subsidence land and dividing the coal mining subsidence land into regular rectangular filling strips; determining soil filling reconstruction profile characteristics and further determining the sequence of the filling strips and the number of synchronous and alternate filling strips; performing layer-by-layer soil stripping on a group of synchronous and alternate filling strips by using an adjacent filling strip which does not belong to the group as a stripped soil stacking area for the synchronous and alternate filling strips, and stacking the stripped soil in corresponding subareas; performing alternate, multilayer and repetitive filling of sediment layers, drainage and covering of subsoil layers, and after reconstruction of all sediment layers and subsoil layers of all filling strips in the group of synchronous and alternate filling strips are completed, backfilling surface soil for coverage and flattening the soil. The method improves the water and fertility preservation performance of the reconstructed profile, accelerates the soil ripening of the sediment layers and facilitates the growth and development of crops.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)
Preparation method of iron-carbon micro-electrolysis ceramsite filler for water treatment
InactiveCN104961201AReduce accumulationHarm reductionWater/sewage treatmentTreatment effectElectrolysis
The invention provides a preparation method of iron-carbon micro-electrolysis ceramsite filler for water treatment, which is characterized by comprising the following steps: 1, mixing iron scrap, waste circuit board powder, river sediment powder of loess cliff section of Xiaofu river in Zibo city of Shandong province and clay, the mass ratio is (15 to 20) to (55 to 60) to (10 to 15) to (10 to 15), and the mixture is formed; 2, adding the mixture into a granulating disc, additionally adding binder diluent for granulating, and the mass of the binder diluent is 25 to 30 percent, the spheroidal particles with each diameter of Phi 3 to 5 mm are prepared; 3, calcining and cooling under oxygen-free atmosphere after the spheroidal particles are dried, and obtaining the iron-carbon micro-electrolysis ceramsite filler. The iron-carbon micro-electrolysis ceramsite filler is prepared by solid waste such as waste iron scrap and waste circuit board powder as the main raw materials, the resources and energy are saved, using waste to treat waste and energy conservation and emission reduction are realized. The wastewater treatment effect is obviously superior to the existing ceramsite, especially for the iron-carbon micro-electrolysis reduction treatment effect of highly toxic wastewater containing hexavalent chromium; and the iron-carbon micro-electrolysis ceramsite filler is long in service life, simple in maintaining, and easy in utilization of regenerative cycle.
Owner:SHANDONG UNIV OF TECH
Sewage treatment river sediment remediation method
InactiveCN104418479ASolve the problem of water quality impactAvoid secondary pollutionWater resource protectionSludge treatment by de-watering/drying/thickeningSewageSewage treatment
The invention discloses a sewage treatment river sediment remediation method. A sewage treatment river sediment remediation material mainly comprises a base material prepared from substances such as coal powder and / or oat straws and / or cedarwood and / or basswood and the like, and a compound bacterial colony adhered to a base material carrier, wherein the compound bacterial colony mainly comprises saccharomycetes and / or photosynthetic bacteria and / or linear bacteria and / or aspergillus; a flocculating agent is a polyacrylamide solution; the concentration of polyacrylamide is controlled to be 1-2mg / l; the volume ratio of polyacrylamide to the carrier is (0.8 to 1)-(1 to 1).
Owner:蒋华
In-situ cleaning and reusing device for black and odorous river sediments, and method thereof
ActiveCN108516658AIncreased redox potentialHarmlessWater/sewage treatment by centrifugal separationSludge treatment by de-watering/drying/thickeningFlocculationWastewater
The invention discloses an in-situ cleaning and reusing device for black and odorous river sediments, and a method thereof. The device comprises a submersible pump, the outlet of the submersible pumpis connected with the inlet of an oxidation reaction tank through a dosing pump, the outlet of the oxidation reaction tank is connected with the inlet of a vibrating screening machine, the coarse particle outlet of the vibrating screening machine is connected with the inlet of a coarse particle collecting tank, the mud outlet of the vibrating screening machine is connected with the inlet of a mudtank, the outlet of the mud tank is connected with the inlet of a cyclone separator through a lifting pump and a valve, the medium particle outlet of the cyclone separator is connected with the inletof a medium particle collection tank, the wastewater outlet of the cyclone separator is connected with the inlet of a flocculation reaction tank, the outlet of the flocculation reaction tank is connected with the inlet of a microfiltration machine, and the device treats areas of a river, formed through division using cofferdams, through water distribution pipelines. The method is characterized inthat reduced pollutants in the sediment are removed through the oxidation effect, the cleaned sediments are screened according to different particle sizes, and are respectively covered in the river channel, and wastewater is treated and reused, so the subsequent treatment and disposal cost of the sediments is reduced.
Owner:TSINGHUA UNIV
Method for removing heavy metal Cd from river sediment
InactiveCN102229462ADestroy nutrient contentEasy to handleSludge processingBiological sludge treatmentMicroorganismEnvironmental engineering
Relating to a municipal solid waste disposal technology, the invention provides a method for removing heavy metal Cd from river sediment by microbial leaching, and the method of the invention aims to provide a solution to the problems of severe heavy metal Cd pollution in urban river sediment and utilization restriction of dredged sediment in agriculture and forestry. The method is realized by: adding a proper amount of cultured and acclimated inoculation liquid into a reaction system, and keeping a substrate at a concentration of 30g / L, the inoculation liquid in a volume ratio of 5%, the dissolved oxygen at a concentration of 7.5-9.0mg / L and the temperature in a range of 25-32DEG C, and regularly supplementing the moisture evaporated in a reactor. The method of the invention employs microbial leaching so as to make the removal rate of heavy metal Cd reach 16%-18%.
Owner:CHONGQING UNIV
Ultrasonic focused river sediment concentration online measuring instrument
ActiveCN106769733AUltrasonic scattering attenuation reductionIncrease horizontal resolutionParticle suspension analysisUltrasonic sensorMeasuring instrument
The invention discloses an ultrasonic focused river sediment concentration online measuring instrument. The measuring instrument comprises a rectangular detection water tank, a lifting device and a water host machine, wherein the detection water tank comprises two focused ultrasonic transducers, a protection casing and two openable and closable valves; the focused ultrasonic transducers are symmetrically mounted on a front side and a rear side of the detection water tank in a horizontal direction; the protection casing is fixed on two surfaces and an upper side, which are equipped with ultrasonic probes, by screws; both sides of the openable and closable valves are clamped in vertical grooves in side edges of a left side and a right side of the detection water tank; when the openable and closable valves are opened, a flow pipeline is formed to perform dynamic measurement; when the openable and closable valves are closed, static measurement can be performed. The ultrasonic focused river sediment concentration online measuring instrument provided by the invention has resolution and sensitivity higher than those of an ordinary planar ultrasonic measuring instrument, and is fixed under water during operation to reduce disturbance of flowing water body; the openable and closable valves are designed, so that the measuring instrument can perform the dynamic measurement and the static measurement on riverine suspended sediments simultaneously.
Owner:CHINA JILIANG UNIV
Method for screening algicidal bacteria and removing microcystis aeruginosa from Lake Tai branch river sediment
InactiveCN103497913AStable algae lytic abilityLow costBacteriaMicroorganism based processesMicrobiologyGenus Lysinibacillus
The invention relates to a method for screening algicidal bacteria and removing microcystis aeruginosa from Lake Tai branch river sediment, belonging to the technical field of environment-friendly water treatment. The invention provides Lysinibacillus fusiformis of which the collection number is CGMCC NO.7520. The invention also provides a method for screening algicidal bacteria and removing microcystis aeruginosa from Lake Tai branch river sediment. The screened algicidal bacteria has a certain dissolution action on the dominant alga strain microcystis aeruginosa in blue algae bloom, and the algicidal bacteria TR3 can be obtained by separation. Under the optimum conditions, the removal rate of the algicidal bacteria TR3 for microcystis aeruginosa within 96 hours can reach 97.18%, so the algicidal bacteria TR3 has very ideal alga dissolution effect; and thus, the algicidal bacteria TR3 can better display the alga dissolution characteristic in a natural water body, and has wider application prospects in large-area water body blue algae bloom pollution treatment.
Owner:CHANGZHOU UNIV
River sediment deposition detection device
ActiveCN111795848AQuick collectionImprove collection efficiencyWithdrawing sample devicesSludgeFluvial
The invention discloses a river sediment deposition detection device, relates to the field of water conservancy equipment, and adopts the technical scheme that the river sediment deposition detectiondevice comprises a supporting device, a driving device is fixedly arranged on the supporting device, a sampling device for collecting a sediment sample is movably connected to the driving device, andthe driving device drives the sampling device to move in the vertical direction; the device also comprises a storage device for storing compressed air; the supporting device comprises an annular supporting frame and a plurality of supporting legs arranged below the supporting frame in an array mode, a vertical fixed frame is fixedly arranged above the supporting frame, and a driving device is fixedly arranged on one side of the fixed frame; and a floating-sinking air bag is fixedly connected to the outer side of the supporting frame. The device has the beneficial effects that sludge with different depths can be collected at a time, it can be guaranteed that the collected cross section is complete, the sample detection precision is guaranteed, and data of various heavy metal pollution in different forms of sludge on the same cross section can be more effectively observed; the sludge collection efficiency is high and the use is convenient.
Owner:马东晓
River sediment adsorption brick and preparation method thereof
InactiveCN105130286AImprove resource utilizationHigh compressive strengthSolid waste managementCeramicwareFoaming agentBrick
The invention provides a river sediment adsorption brick comprising following components: 40-50 parts of river sediment, 15-20 parts of cements, 10-15 parts of zeolite powder, 5-10 parts of zeolite, and 2.5-5 parts of gypsum; water accounts for 32-36% of total of solid materials, and a foaming agent accounts for 0.1-0.2% of total water amount. The invention also provides a preparation method for the river sediment adsorption brick, comprising steps: mixing the river sediment, cement, zeolite powder, and gypsum uniformly to make a mixture, adding the foaming agent in water and stirring until foams occur; adding the solution in the mixture; laying the zeolite evenly and uniformly on the bottom of a standard mold, pouring the mixed slurry in the standard mold, maintaining and demolding, and maintaining for the second time, thereby obtaining the river sediment adsorption brick. In the invention, the river sediment content amounts to 45-65%, the river sediment has a high utilization rate, and the river sediment adsorption brick has a high compressive strength which is no less than MU7.5 grade, and can substitute for the traditional solid chamotte brick.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Preparation method of black-odor river sediment covering material
InactiveCN107540181AReduce contentEfficient decompositionSludge treatmentOther chemical processesNatural stateTherapeutic effect
The invention discloses a preparation method of a black-odor river sediment covering material. The preparation method comprises the following steps: (1) mixing and stirring fly ash and an oxygen sustained-release material at a preset proportion to obtain a first mixed material; (2) mixing the first mixed material with a solidifying material, and stirring to obtain a second mixed material; 3) adding water to the second mixed material obtained in the step (2), stirring to obtain a mixture, and extruding and granulating the mixture to obtain a solidified body precursor; (4) air-drying the solidified body precursor in the step (3) in a natural state to obtain a solidified body; (5) heating the solidified body obtained in the step (4) under protection of nitrogen, and naturally cooling to obtain the covering material. The preparation method of a black-odor river sediment covering material, provided by the invention, prepares the covering material by using the fly ash as a main body and combining with the oxygen sustained-release material and the solidifying material through a special process; the covering material has a good treatment effect on heavy metals, N, P and other nutrients andrefractory organic matters released by the sediment.
Owner:HUATIAN ENG & TECH CORP MCC +1
River sediment ecological treatment method
InactiveCN109133519AMaintain ecological balanceLow costSpecific water treatment objectivesWater contaminantsTreatment effectMicrobial agent
The invention belongs to the technical field of river treatment, and particularly related to a river sediment ecological treatment method. After solid waste deposited in a river is fished, an intercepting net is arranged at the downstream of the river, citric acid solution serving as an activator and adsorption balls are added into the river, the adsorption balls are filled with adsorbents, sediment and river water are mixed and sufficiently adsorbed, microbial agents are added, a river bottom is subjected to aeration treatment and water disinfection, and submerged plants are cultivated in a tiled manner. By combining various modes of solid waste fishing purification, adsorption of organic pollutants by the adsorption balls, microbial water purification, river bottom ecological plant system building and the like, the river sediment is progressively and omnidirectionally purified and repaired to restore ecological balance, and the river sediment ecological treatment method is low in cost, remarkable and lasting in treatment effect and suitable for popularization and use.
Owner:河南省科学院地理研究所
System for detecting sediment content by adopting capacitive differential pressure sensors
InactiveCN101603910APrevent problems such as entanglementHigh precisionSpecific gravity by measuring pressure differencesDifferential pressureSludge
The invention discloses a system for detecting sediment content by adopting capacitive differential pressure sensors. The system comprises a water sample pretreatment system, a signal acquisition system, a control treatment system, and a touch screen display system, wherein the systems are orderly connected, the touch screen display system is connected to a data transmission system; the data transmission system is connected with a configuration monitoring system; the signal acquisition system comprises a depth sensor, a sediment content sensor, a flow velocity sensor, a water temperature sensor and an analog quantity input / output module; and the depth sensor, the sediment content sensor, the flow velocity sensor and the water temperature sensor are connected with the analog quantity input / output module respectively; and the analog quantity input / output module comprises four analog signal input channels. The system comprehensively considers a plurality of environmental factors, realizes the high-accuracy sediment content measurement, can be applied in the field of general river sediment detection, and can also be applied in fields such as water quality management of reservoir areas and channel cleanout of yellow river basin, sludge discharge management of sewage treatment plants and the like.
Owner:YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION +2
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