200 results about "Contaminated Substance" patented technology

The invention discloses a method for fixing pollutants in pollution source soil in abandoned mine fields and application thereof. The fixing method comprises the steps of loosening the soil, digging holes, adding modifier and fertilizer to balance the soil in the holes, planting energy trees in the soil in the holes, sowing pioneer grass seeds on the topsoil in the holes, and the like. The invention uses chemical modifier and fertilizer to modify the planting condition of the polluted soil in mine areas, then interplants pioneer grass, fast-growing energy trees and other plants to effectively fixe substances such as heavy metal pollutants in soil, avoid the pollutants from being discharged to downstream areas in the form of acidic mine waste water to pollute the environment and damaging the ecology.

The invention discloses a magnetic-assistance electrokinetic remediation device for contaminated soil. According to the magnetic-assistance electrokinetic remediation device for the contaminated soil, contaminants in the contaminated soil can be enriched in a regulated area in an acceleration mode through the effect of an extra electric field and the effect of an extra magnetic field, so that the purpose of cleaning the contaminated soil is achieved. The magnetic-assistance electrokinetic remediation device for the contaminated soil comprises an electrode liquid addition tube, an anode plate, a processing area, a cathode column, an electrode chamber, a magnet, an outer shell and an electrode liquid discharging tube. The contaminated soil is placed into the processing area, electrode liquid enters the area of the electrode chamber through a pipeline, the contaminants in the contaminated soil can rapidly transfer through the extra electric field and the extra magnetic field, and the concentration of the partial contaminants is improved. The magnetic-assistance electrokinetic remediation device for the contaminated soil is simple in structure, low in construction cost and easy to operate, can achieve degradation and removal of various contaminants in the contaminated soil.

The invention discloses a treatment method of river polluted bed mud, comprising: adding oxidant into a polluted river to ensure that the bed mud on the surface layer is in the oxidation state; and preferably, adding water-solubility calcium salt and ferric salt. The invention ensures that the whole self-cleaning process of the river is in the aerobic state all the time by improving the oxidation reduction property of the polluted bed mud, thus creating conditions for aerobic microorganisms, amplifying bed mud aerobic microorganisms, and leading the aerobic microorganisms to digest organic pollutants; and in addition, the organic pollutants are completely oxidized and degraded into complete oxides such as CO2, H2O, NO2, SO4<-2> and the like, blackening and odor-causing substances, such as H2S, methyl mercaptan, FeS and the like produced during the anaerobic degradation of organic matters can be quickly oxidized, and the black and odor degree of water body can be effectively improved and remitted. Meanwhile, the calcium salt, the ferric salt and phosphorus-deposited nutritive salt are simultaneously added to lower river pollution degree and eutrophy level. The method of the invention has simple operation and strong selective pertinence, can treat in situ, almost does not damage the ecological balance of the original river and has favorable treatment effect.

PCT No. PCT/EP97/02711 Sec. 371 Date Jul. 12, 1999 Sec. 102(e) Date Jul. 12, 1999 PCT Filed May 15, 1997 PCT Pub. No. WO97/43914 PCT Pub. Date Nov. 27, 1997Method for substantially decreasing the viability of microorganism and deactivating enzymes in a contaminated substance by exerting a high pressure the substance. The substance is conducted in a steady flow through and open narrow tube while the pressure difference between the entrance and the exit of the tube is maintained at 100 Mpa or more. The temperature rise of the product while passing through the tube can be confined to less than 5 DEG C. The method provides a continuous ultra high pressure preservation process suitable for processing foods.

The invention relates to a method for electrokinetic decontamination of a porous solid medium, which comprises:

• • a) extracting the contaminating species present in the solid medium in an electrolyte appearing as an essentially inorganic gel, this extraction being obtained by applying an electric current between two electrodes positioned at the surface and/or in the interior of the solid medium, the contact of at least one of these electrodes with said solid medium being ensured by a layer of said gel,
  • b) drying the gel containing the thereby extracted contaminating species until a dry residue is obtained which fractures, and
  • c) removing the thereby obtained dry residue from said solid residue.

Applications: decontamination of materials with a cement matrix, notably within the scope of dismantlement of military or industrial installations, in particular nuclear installations, or the rehabilitation of installations likely to have been contaminated by ecotoxic or radiological chemical species; clearing pollution of geological soils, sediments and sludges.

The invention belongs to the fields of treating odorous pollutants through chemical oxidation technology, and relates to a method for treating odorous gas by utilizing solution of hexavalent ferric salt. Odor is harmful to human respiratory, circulatory, digestive, endocrine and nervous systems, and odor pollution has become one of numerous environmental pollution problems to be solved; and in the method, the solution of hexavalent ferric salt and odorous substances are subjected to a chemical oxidation reaction, so that active groups in the odorous substances are changed. Due to oxidation of the hexavalent ferric salt on hydrogen sulfide, ammonia, methyl mercaptan and other odorous substances in the odorous gas, the active groups in the odorous waste gas are oxidized into non-toxic and harmless sulfate and other products. Therefore, the aim of purifying the odorous waste gas is fulfilled, and the odor of the odorous waste gas can be effectively removed.

The invention discloses a biological aerated filter and a sewage treatment process thereof. An inner cavity of a tank body is divided into an anoxic reaction region at the lower half part and an aerobic reaction region at the upper half part. A backwashing drain pipe, an aerator pipe and a filter material bearing structure are arranged between the anoxic reaction region and the aerobic reaction from bottom to top sequentially. Biological filter materials in the aerobic reaction region are stacked on the filter material bearing structure. The anoxic reaction region is provided with a pluralityof groups of hangers for hanging the anaerobic biological filter materials. The lower part of the tank body is provided with a water inlet pipe. The top of the tank body is provided with a drain pipe. The drain pipe is provided with a bypass return pipe communicated with the water inlet pipe at the bottom of the tank body. In the invention, the anoxic region and the aerobic region which are arranged separately conventionally are integrated to carry out pre-denitrification, so that not only are pollutants in water effectively removed, but also the pollutant removing efficiency is high, equipment is simple and the biological aerated filter is easy to operate and is convenient to maintain.

The invention discloses a nanometer medicament for simultaneously removing arsenic, phosphorus and fluorine in water. The nanometer medicament is prepared from the following components in percentage by weight: 0.1 to 99.7 percent of conventional metal salt, 0.1 to 99.7 percent of titanium salt, 0.1 to 99.7 percent of rare-earth salt and 0.1 to 99.7 percent of chitosan derivative. The solubility product of an insoluble compound which is formed by reacting the medicament with soluble arsenic, phosphorus and fluorine in the water is extremely low, and thereby the insolubility of the arsenic, the phosphorus and the fluorine in the water can be effectively improved; particles and specific gravity of the formed insoluble compound are large, and pollutants such as the arsenic, the phosphorus and the fluorine in the water can be removed simultaneously. The invention also provides a preparation method of the nanometer medicament. In the technology, the conventional metal salt, titanium salt, rare earth salt and chitosan salt crystal are respectively prepared into solutions; the solutions are uniformly mixed, and then are subjected to simple operation process steps such as drying crystallization and nano-grinding, so the nanometer medicament for simultaneously removing the arsenic, the phosphorus and the fluorine in the water can be successfully prepared; in addition, the preparation method has the advantages of high synthetic yield, easiness in process operation and method promotion, low production cost, low pharmaceutical dosage and low amount of formed sludge.

The invention discloses a composite medium biological filter sewage treatment method and a matched device. The device comprises a perforated water distribution pipe, a filter main body, a packing layer, a ventilating pipe, a water outlet pipe, a water collection chamber and an aerator pipe. The packing layer is formed in a mode that a composite medium rapid infiltration layer and a composite medium mixing layer are arranged inside the filter main body at intervals; sewage is uniformly distributed in the composite medium rapid infiltration layer through the water distribution pipe, further infiltrates after being primarily purified by the composite medium rapid infiltration layer, and continuously infiltrates after being sufficiently contacted with packing in the composite medium mixing layer; and pollutants in the sewage are adsorbed, degraded and transformed step by step under the combined action of the packing and microorganisms in the packing; and finally, the high efficiency purification of the sewage is implemented. According to the invention, a medium has wide source and low price; the sewage is deeply purified under the combined action of various microorganisms with different functions; and finally, the discharge with standard level or the resource utilization of the sewage is implemented.

The invention relates to the technical field of treatment of sediment in rivers and lakes, and provides a method for in-situ remediation of sediment in a black and odorous water body. The method comprises the following concrete steps: sequentially adding zeolite powder, calcium peroxide, highly-efficient polyaluminium chloride, a natural mineral composite material, modified diatomite and modifiedattapulgite into the sediment, carrying out stirring while adding, and completing addition within 1-2 hours; continuing stirring for 20-40 minutes after completion of material addition; adding an activated denitrifying bacteria agent, a photosynthetic bacteria agent and a bacillus subtilis agent into the sediment, and carrying out bottom aeration for 1-4 hours; and after 3-7 days, planting submerged plants. The method provided by the invention is simple and practicable, short in construction time and good in ecological effect, removes sediment pollutants in situ, recovers the water area environment of an overlying water body at the same time, eliminates the black and odorous water body in a short period of time, improves the transparency of a water body, solidifies and eliminates pollutants in the sediment, reduces the contents of COD, ammonia nitrogen and total phosphorus in the overlying water body, and recovers the water ecological environment in a short period of time.

The invention discloses a device for removing pollutants in rural domestic sewage. The device comprises a three-grid septic tank, a filter screen, an anaerobic suspended packed bed reaction tank, a hypoxic aeration tank, a vertical flow sedimentation tank, an artificial aquatic plant bed and a phosphorus absorbing tank which are sequentially communicated; and the three-grid septic tank, the filter screen, the anaerobic suspended packed bed reaction tank, the hypoxic aeration tank and the vertical flow sedimentation tank are arranged on the upper part side by side, while the artificial aquatic plant bed and the phosphorus absorbing tank are arranged on the lower part side by side; and a water distribution gallery is additionally arranged between the water outlet of the vertical flow sedimentation tank and the water inlet of the artificial aquatic plant bed. The device disclosed by the invention is quite high in rural domestic sewage treatment efficiency, and effluent quality can reach class-A standard in Pollution Discharge Standard for Municipal Sewage Treatment Plant (GB18918-2002); and meanwhile, the device is small in occupied area, low in investment, simple in operation, management and maintenance, and low in operation and maintenance expenses.

The invention provides a plate-type biological filtration tower and the process of treating waste gas. The tower plate is produced according to ratio between layer thickness and tower diameter being 0.2-0.5 and the whole biological filtration tower composes a plurality of tower plates. The nutriment liquid is directly sprayed to every tower plate and counter-current contacts with waste gas from tower bottom to remove pollutant in waste gas; the pollutant is oxided to carbon dioxide, water and other simple compound. The top tower plate is used as dehydrater for gas current to spray cleaning liquid interstitially (usually 1% diluted alkaline liquor). The invention is characterized in that: the contact between gas and liquid is even and thorough, the spray strength can be controlled according to pollutant load, the supporting intensity of filler layer is small, and dewatering system is installed inside.

The invention discloses an in-situ repair method for polluted sediment nitrogen nutritive salt and an in-situ repairing pile applied to the in-situ repair method, and belongs to the field of sediment in-situ repair. The in-situ repair method comprises the following steps of (1) mixing a nitrogen immobilization material and a slow-release oxygen material according to a mass ratio of (5-15):1; (2) putting the mixed material into in-situ repairing piles; (3) vertically inserting the in-situ repairing piles into sediment so that the in-situ repairing piles are uniformly distributed on a plane of an area to be repaired; and (4) covering the mixed material in the step (1) on the surface of the sediment with the inserted in-situ repairing piles to obtain a sediment in-situ covering layer with the thickness of 20-30 cm. According to the in-situ repair method disclosed by the invention, ammonia nitrogen in the sediment can be adsorbed, the diffusion of polluted substances to upper covering water can be reduced, dissolved oxygen in the sediment and a hydrospheric surface is improved, the growth of aboriginal denitrified bacteria is facilitated, and nitrogen in the sediment is facilitated to be metabolized out of a system so that the purpose of in-situ repair of surface water sediment is realized.

The invention provides a modularized movable soil leaching system. The modularized movable soil leaching system comprises: a soil feeding device, which is used for receiving contaminated soil and capable of discharging the contaminated soil while vibrating; a vibration feeding hole, which is used for receiving the contaminated soil discharged by the soil feeding device and quantitatively discharging the contaminated soil by controlling a vibration speed; a conveying belt, which is used for receiving and conveying the contaminated soil quantitatively discharged from the vibration feeding hole;a granularity screening machine, which is provided with a screening net and is used for screening the contaminated soil conveyed by the conveying belt into soil with granularity smaller than specifiedgranularity and contaminated soil with granularity larger than the specified granularity; a high-pressure leaching device, which is used for carrying out high-pressure leaching on the contaminated soil with the granularity smaller than or equal to the specified granularity received from the granularity screening machine, separating the contaminated soil into remediated soil and contaminants and discharging the remediated soil and the contaminants; and a screening device, which is used for receiving the remediated soil and the pollutants discharged by the high-pressure leaching device, discharging the remediated soil with granularity greater than the specified granularity as purified soil, and discharging the pollutants with granularity smaller than the specified granularity as waste waterwith.

The invention discloses a rapid lake water quality sampling and detecting method, and belongs to the technical field of lake treatment. According to the method, a rapid water body sampling device samples a water body of a water area to be detected, a collected water body sample is processed, the processed water body sample is detected, and an obtained detection result is compared to obtain accurate water quality information. Thus, various accurate detection is carried out on a lake water source, chemical pollutants causing water pollution are rapidly monitored from the aspects of different pollutants, support is provided for establishing a rapid emergency response and early-warning system, the water source is collected in different periods to obtain accurate water quality information, thewater source in different periods is further divided into samples at different temperature, the water quality of the water source in the area at different temperature can be detected, and the accuracyof water quality detection is effectively guaranteed.

The invention discloses a rapid biofilm formation method for low C/N ratio waste water treatment using a calcium ion-regulated biofilm method, belonging to the field of biofilm-process waste water treatment. The method is characterized by comprising the following steps: (1) measuring biochemical oxygen demand 5/total nitrogen (BOD5/TN) of the low C/N ratio waste water; (2) measuring the polysaccharide concentration of dissolved substances in the low C/N ratio waste water and the salinity of the waste water; (3) measuring the contact angle of a filler carrier used by the biofilm method for treating the low C/N ratio waste water; (4) selecting a proper regulation and control scheme according to the related measured values; (5) enabling a biofilm reactor to run, and adding a certain amount of rhamnolipid and calcium chloride into the low C/N ratio waste water every day until biofilm formation is completed. According to the rapid biofilm formation method, calcium ions are complexed with pollutants in the low C/N ratio waste water, so that the attachment and colonization of the dissolved substances and microorganisms in the waste water are accelerated, and the biofilm formation effect is further improved.

The invention relates to a simulator for researching the distribute operation of soluble material in multi-phase system and the application of said device, wherein said simulator is formed by balance device and mixer; the balance device is formed by outer room and central room; the outer room and central room have round holes (8), while they are fixed on one horizontal plate (9); the connection between each room and horizontal plate is sealed and mounted; the outer rooms are independent and through to the central room via baffle film (11); the outer room and central room are independently mounted with magnetic mixer (17), to be rotated via the magnetic mixer magnetic pole (19), to distribute the soluble material of each room uniformly. The inventive device can separate the solid material in liquid phase, and balance the distribution of containments; therefore, the inventive device can be used to simulate the containments in water condition in multi-phase system.

The invention provides an adsorbent material and method for treating contaminants. The adsorbent material is made to contact with asphaltene to adsorb one or more contaminants. For example, the asphaltene can be used to treat or repair contaminations including water and soil. Asphaltene in the form of particles or fibers is also provided for adsorbing substances such as organic contaminants from water or soil. Thus, a method for biochemically degrading pollutants by combining the asphaltene and microorganisms is realized. The present invention provides an adsorbent material for removing contaminants from contaminants. The adsorbent material comprises asphaltene. A whole process is green and environment-friendly; and the adsorbent material and method have a good application prospect.

The invention discloses a purification device for removing impurities in oil liquids. The purification device for removing impurities in oil liquids comprises a tank body, wherein the tank body is internally provided with a porous material component and a condensation device; the porous material component separate the tank body into an inner region and an outer region internally; the condensation device is arranged in the internal region of the porous material component; the top of the tank body, which is positioned on the exterior region of the porous material component, is provided with a working medium drum inlet; the bottom of the tank body, which is positioned in the interior region of the porous material component, is provided with an oil outlet. The purification device and method for removing impurities in oil liquids are novel in concept, are mainly used for introducing working media into the tank body with the porous material component based on the rectification acceleration technique, and removing impurities of pollutants and the like in the oil liquids by utilizing the entrainment function of working media.

The invention belongs to a method and a device for comprehensively purifying wastewater containing heavy metal ions and organics. The method comprises the following steps: blending and mixing different types of mud-containing sewage in a homogenization tank according to different chemical indexes and measured data of the mud-containing sewage in all wastewater recycle pools, so that the chemical indexes of the mud-containing sewage are changed, the water amount is uniform and floccules are formed, or pollutants in the water are precipitated. A mechanical purifying device comprises a base, a mud sewage magnetization tank, an electrolyzing and magnetizing machine, a medicine blending, flocculating and feeding tank and a mud-water separator. The method and the device disclosed by the invention can be used for comprehensively purifying industrial wastewater containing pollutants such as heavy metal ions, suspended solids and organics, and has the advantages that purifying equipment construction cost is low, the treatment cost is low and good energy conservation and environmental pollution effect and good purification effect are achieved.

The invention discloses a method for treating wastewater after contaminated soil remediation. The comprises the following steps: collecting wastewater generated in a contaminated slag block flushing stage and a tail gas treatment stage into an adjusting tank, and conveying the wastewater into a primary sedimentation tank by the adjusting tank through a lifting pump to remove part of organic matters and SS in the wastewater; after passing through the primary sedimentation tank, the wastewater is self-retained to the chemical oxidation reactor by gravity, and after passing through the chemical oxidizer, most organic matters in the wastewater are removed by oxidation; the wastewater is retained by gravity, and a coagulant and a flocculant are added after the wastewater enters a secondary sedimentation tank so that organic matters in the wastewater are further removed; effluent of the secondary sedimentation tank flows into an intermediate water tank, the water is lifted to a quartz sand filter and an activated carbon filter through a lifting pump, pollutants in the wastewater are further filtered and adsorbed, and the treated wastewater is recycled according to site requirements; according to the method, wastewater generated in the contaminated soil remediation process is effectively treated, and secondary pollution of soil is prevented; human health is guaranteed, and normal production and construction activities are guaranteed.

The invention relates to the technical field of sewage treatment, and discloses a detection auxiliary device for sewage treatment, the detection auxiliary device comprises: a shell, wherein the interior of the shell is movably connected with a rotating frame; the position of a sample is automatically adjusted, detection is facilitated, subsequent screening and mixing operation is triggered according to the capacitance principle, linkage between structures is improved, operation is more convenient and faster, the higher automation degree is achieved, and through the combined action of a gear ring, a gear, a screening plate, a rotary column, a rotary disc, a ratchet wheel and an electromagnet, impurities in a sample are automatically accumulated at the bottom, so that the clarity of water quality is improved, the influence on the detection effect due to the existence of large-volume garbage impurities in sewage is avoided, the working intensity is reduced, the treatment operation beforedetection is simplified, the convenience is higher, the flowability of the sewage is promoted in a rotating manner, and the situation that pollutants in the wastewater are prevented from precipitate,therefore, the detection result is not accurate can be avoided, and the detection is convenient.

The invention relates to the technical field of garbage treatment devices, and discloses a river and lake water surface garbage collection and pollutant degradation device which comprises a device body, mounting pin holes are formed in the peripheral side wall of the device body, a control chamber is arranged at one end of the device body, a baffle is arranged on one side of the control chamber, and a balancing weight is arranged in a baffle shell. A floating body is arranged on one side of the balancing weight. A stainless steel intercepting net is fixedly mounted on one side of the balancing weight. A water pump is fixedly installed on the inner wall of the bottom of the stainless steel intercepting net, one end of the water pump is connected with a drainage pipe, and solidified carrier microorganisms are arranged in the control chamber. According to the river and lake water surface garbage collection and pollutant degradation device, garbage is collected and periodically cleaned by arranging the stainless steel intercepting net, meanwhile, immobilized carrier microorganisms are arranged, targeted microorganisms can be released outwards, pollutants in a water body are reduced, and the device is high in safety, low in labor intensity, low in energy consumption and low in operation cost.