67results about How to "Conducive to ecological restoration" patented technology

The invention discloses method and device for biochemically recharging and restoring polluted soils in a chromium slag yard. The device comprises a soil treatment groove containing soils to be treated, a middle pond, a biochemical pond and a bacteria culture pond. Every two parts are connected through a water pipe, chromium polluted soils are installed in the soil treatment groove to be heaped after being crushed by a 2cm sieve, the height of a mound is smaller than 0.8m, and the soils are sprayed by Cr (VI) reducing bacteria (Pannonibacter phragmitetus BB) culture medium with the spraying strength of 0.008-0.015m<3>/h.m<2>; and leachate is collected from the bottom of a soil groove to the middle pond, bacterial liquid in the middle pond is pumped into the biochemical pond by an alkali resistance pump, and bacterial liquid in the biochemical pond circulates again to be used for spraying the soils and is in circulating spraying for 5-7 days until the soil leachate does not contain Cr (VI). By adopting the invention to restore the polluted soils in the chromium slag yard, the removal rate of water-soluble Cr (VI) in the soils achieves 99 percent, and the concentration of Cr (VI) leaching toxicity in the soils after restoring is lower than 0.5mg/L and achieves a standard limited value of roadbed materials and concrete aggregates in Technical Specifications for Chromium Slag Pollution Control (HJ/T301-2007). Simultaneously, the invention has the advantages of having simple technology, low cost and no secondary pollution, improving the physicochemical property of the soils, and the like.

The invention discloses a method for treating micro polluted water by using a biological nitrogen removal and physicochemical enhanced phosphorus removal combined process, and belongs to the technical field of water pollution purification treatment. The inlet water enters a biological contact oxidation tank through a lifting pump, and flexible fibers are used as a film forming filler and a rotary fan is adopted for aeration in the tank; the outlet water overflows to a quick filter tank, the bottom of the tank is provided with a backwashing pipeline, and the tank is periodically backwashed to avoid blockage; the outlet water of the quick filter tank passes through a deoxidization tank from bottom to top, so dissolved oxygen (DO) in the water is reduced, and a favorable condition is provided for subsequent denitrification; an facultative tank realizes denitrification by adopting a camphorwood leaf and ceramsite combined filler to remove TN; the outlet water flows into a flocculation reaction tank and is subjected to enhanced coagulation with stirring; and soil-liquid separation is performed in a phosphorus removal sedimentation tank, and the supernate flows through an anthracite filler device from bottom to top and finally flows into a lake. The method ensures that the substances such as chemical oxygen demand (COD), NH4+-N, NO3--N, TN, TP, SS, Chla and the like in the outlet water are furthest removed, and the outlet water reaches the class III water quality standard of Environmental Quality Standards for Surface Water (GB3838-2002).

The invention relates to an ecological restoration apparatus for slightly-polluted river water body, and effectively solves the restoration problem of the slightly-polluted river water body. According to the technical scheme, the center of a frame is provided with a fixing plate through a bolt, uniformly-distributed water-permeable planting grooves are arranged on the frame, and emergent plant is planted in the water-permeable planting grooves; the upper part of the frame is paved with an artificially-synthesized matrix layer, and a wet-land dwarf cold-resistant plant is planted on the matrix layer and is apart with emergent plant; a vertical connection rope is tied to the lower part of the frame, uniformly-distributed biological membrane fillers are disposed on the vertical connection rope and are in serial connection, and the vertical connection rope is fixedly disposed on first gravel at the bottom of the water body; the frame is transversely fixedly connected with a timber pile on the river slope via a haulage rope, the frame is floated on the water surface; and multiple unit restoration apparatuses are in uniform serial connection and form a restoration apparatus array. The apparatus can enable the slightly-polluted water body to be subjected to omnibearing area purification, and is good in landscape effect, high in stability and impact resistance, also convenient to transport, easy to assembly and simple to run, and free combination can be realized.

The present invention provides one kind of skin wound repairing agar/collagen dressing and its preparation process and application. Agar and collagen or gelatin are mixed, and the mixture is freeze dried to obtain porous compound rack or compound film for promoting the repair of skin wound, and the rack may be also used in other soft tissue engineering. The porous compound rack and compound film of present invention has simple operation, low cost and wide use, and may be used in repairing burnt and ulcer skin as well as for cartilage, cornea, fat and soft tissue engineering.

The invention discloses a preparation method of composite improved planting soil for vegetation restoration of mining slopes. The preparation method comprises following steps: (1), grinding distillers' grains, bagasse, diatomite and fly ash, and performing sieving to obtain a prefabricated material a; (2), thickening and dewatering municipal sludge, carrying out drying and smashing, adding iron tailing sand to be mixed uniformly, adjusting water content, then adding a binding agent, conducting granulation, feeding particles into a rotary kiln, carbonizing the particles at 500-600 DEG C for 20-30 min, performing cooling, and adding activated carbon and decomposed organic fertilizer to be mixed uniformly to obtain a prefabricated material b; and (3), uniformly mixing the prefabricated material a and the prefabricated material b, adding a fermented liquid to the mixture for decomposing at the decomposing temperature of 40-50 DEG C for 20-40 days, keeping the water content of the mixture at 16wt%-20wt% in the decomposing process, drying the mixture, adding polymaleic anhydride and polyvinyl alcohol to be mixed uniformly, and conducting granulation to obtain the composite improved planting soil for vegetation restoration of the mining slopes.

The invention provides a method for tailing pond microbial remediation with multiple sulfate-reducing bacteria EM2, SRB-4 and iron ion reducing bacteria Biometek-A. The above bacteria are introduced into tailings and nutrients needed by microbial growth are added to construct a set of tailing pond microbial remediation system. Some nutrients added into the tailings and growth of the reducing bacteria can inhibit the growth of inherent oxidizing bacteria in tailings and obviously inhibit the oxidation and dissolution of multiple heavy metal ions, thus improving the pH of tailings, lowering theredox potential, and at the same time greatly reducing the permeability of tailings. Therefore, the remediation method can reach a remediation effect on the tailing pond.

The invention discloses an extraction method of weathering crust elution-deposited rare earth ore. According to the extraction method, a biological leaching and organic acid (salt) combined leaching process is mainly adopted in the leaching stage, clean and efficient extraction of rare earth resources is achieved on the premise that the environment is not polluted, and the extraction method has the advantages of being good in leaching effect, low in cost, environmentally friendly and the like. According to the process, impurity dissolution can be reduced, and the rare earth separation efficiency and the product quality can be improved; microorganisms and metabolites of the microorganisms can enhance the permeability of a leaching agent, reduce leaching blind areas and increase the effective utilization rate of the rare earth resources, and pollutant degradation and ecological restoration are partially facilitated; and rare earth elements are enriched through solvent extraction and reverse extraction technologies, and then a high-quality rare earth product can be obtained through a precipitation method.

The invention provides an ionic rare-earth ore infiltration system reinforced leaching method. The infiltration process comprises the step of adding a leaching agent to perform leaching; and the method is characterized in that ZXT-16 is also added as a reinforcer in the leaching process. The separated ionic rare earths have the advantages of favorable leaching indexes, high leaching recovery rate and low production cost; and the novel reinforced leaching method has the advantages of high stability, high efficiency, favorable infiltration flow effect, sufficient exchange reaction, high leaching indexes, environment friendliness and no pollution, and is suitable for popularization and application.

The invention discloses a method for in-situ no-damage determination of the biomass of a submerged plant. The method comprises the following steps: (1) fencing a water area and setting a section; (2) determining characteristic parameters of the submerged plant: determining the height of the submerged plant in the section of the water area of quadrats along the section by utilizing an echo detector fixed on a running ship; (3) calculating SPVI: exporting quadrat section results determined by the echo detector; (4) building a regression model; (5) utilizing an inverse distance weight space interpolation method in AcrGIS software to perform spatial interpolation on the results exported by echo detection; (6) calculating an average value of the water depth, the height of the submerged plant and the cover degree obtained by the inverse distance weight method; and (7) investigating the future biomass of the submerged plant in the water area or the same type of water area, and obtaining the water depth, the plant height and the cover degree of the water area through the echo detection. The method is easy to implement, simple and convenient to operate, free of damage in situ and accurate in estimation, and is suitable for investigation of submerged plants in lakes and other shallow water.

The invention discloses an antibacterial composite biological material containing agarose acetate and a preparation method thereof. An antibacterial drug is added to a biologically-inertial agarose acetate electrospun fibrous membrane as a base; hydrogen bonds on the surface of the surface drug of composite fiber can be utilized so that antibacterial particles are firmly supported to the surface of electrospun fiber; therefore, the antibacterial composite biological material containing the agarose acetate is provided. The antibacterial composite biological material can prevent nutrient supplyof healing field tissues from being affected, and normal healing mechanism of the tissues is maintained; during release of the antibacterial drug, the material can degrade and disappear; degradation products never cause toxic and harmful effects to the tissues and the body, and the material can truly promote healing of antibacterial tissues. The antibacterial composite biological material has goodmechanical properties and biological compatibility and has degrading time that matches with healing time of infected tissues; the antibacterial composite biological material is suitable for antibacterial materials, regenerative medical research and clinical practice.

The invention discloses an improver for soil remediation. The improver comprises nanometer humic acid, micronized serpentine, diatomite micro-powder, a composite water retaining agent and a microbialpowder according to a weight ratio of (29-33):(10-14):(15-19):(4-6):(0.5-1.5). The invention also discloses a preparation method of the improver for soil remediation. The improver for soil remediationcan effectively increase the aggregate structure of soil, improve the void condition of soil, improve the nutrient content and the water retention and fertilizer conservation capability of the soil,reduce the content of heavy metals and organic pollutants in the soil and promote the growth of plants and microorganisms, and is conductive to ecological restoration of contaminated soil.

The present invention relates to a multifunctional trash rack. It includes the following several portions: trash rack frame, it is a reatangular frame which is made up by welding stainless steel angle-bars; supporting strips which are stainless steel flat bars respectively welded on the front side of said trash rack frame; filter core fixing strips which are stainless steel flat bars respectively bent into 'U'-shape and connected with two sides of trash rack frame; three stand bars which are stainless steel bars welded in the bottom portion of trash rack frame and formed into a stable triangular support; ad sponge filter core which is placed in the trash rack frame interior.

The invention discloses a risk management and control and ecological restoration method for a metal mine pollution site. The method comprises the following steps: S100, leaching, identifying and classifying solid wastes and polluted soil of the metal mine pollution site; S200, carrying out corresponding treatment on different types of pollution media; and S300, carrying out ecological regreening treatment on the treated metal mine polluted site. According to the method, the solid wastes and the polluted soil in the metal mine polluted site are classified and identified according to related standards, and pollutants with different properties are classified and treated, so that the pollutants are prevented from polluting surrounding soil and water through surface runoff or leaching; recovery of the ecological environment of the metal mine and safety of surrounding human settlement and the ecological environment are achieved.

The invention discloses an ecological remediation integrated dyke foot mud flat protective structure. The protective structure comprises boxes, geotechnical cloth, vegetation ecological concrete layers and plant units. The bottom of each box is provided with a plurality of first connecting holes. The internal bottom of each box is covered with the geotechnical cloth. The boxes are filled with planting soil. The planting soil is supported on the geotechnical cloth. Each vegetation ecological concrete layer is poured at an opening of the top of each box. The plant units are planted in the planting soil and extend to the outer side through the corresponding vegetation ecological concrete layers. The invention further discloses a protective method adopting the ecological remediation integrateddyke foot mud flat protective structure. Through the ecological remediation integrated dyke foot mud flat protective structure and method, dyke foot mud flats can be protected, and the ecological remediation effect of the mud flats can be improved.