36 results about "Sediment remediation" patented technology

A rotating cylindrical containment tool that removes contaminated sediment and prevents the dispersion of contaminated sediments during excavation. The tool casing is rotated and is forced down into the sediment whereby the sediment rises up into the interior of the casing. Water flows into and out of the casing based on external and internal pressures. After the sediment rises into the cylindrical casing a feed auger assembly extending therefrom is utilized to deliver materials and / or cap the excavated void space in the sediment. Alternatively, the rotating containment tool prevents the dispersion of contaminated sediments and treats contaminated sediment in situ with treatment reagents, in the sub-aqueous environment.

The invention belongs to the technical field of environment protection and particularly relates to an in-situ combination method used for surface water black odorous sediment remediation. The method includes: adding zeolite modified by zirconium to a position above a sediment-water interface, and stirring or hydraulically disturbing to mix sediment with the zeolite modified by the zirconium; injecting nitrate into the sediment; adding the zeolite modified by the zirconium and zeolite to the position above the sediment-water interface to form a first covering system; covering the first covering system with a second covering system built by geotechnical cloth wrapping special absorbent materials; continuously remedying for a certain period of time, then removing the second covering system, and allowing the first covering system to be still placed at the position above the sediment-water interface. The method has the advantages that the method combines nitrate injection, adding of the zeolite modified by the zirconium, covering by the zeolite / zeolite modified by the zirconium mixture and covering by the geotechnical cloth wrapping the special absorbent materials to remedy the black odorous sediment and control the release of sediment ammonia, nitrogen and total phosphorus, and the method can effectively prevent the nitrate from leaking into overlying water.

The invention discloses a contaminated bottom sediment remediation agent, a preparation method and a using method thereof, and relates to a remediation agent for strengthening the degradation of polycyclic aromatic hydrocarbons in contaminated bottom sediment and a treatment method. The preparation method comprises the following steps of: sieving mineralized refuse by using a sieve with the aperture of between 1 and 5mm to obtain a mineralized refuse siftage, shredding mushroom residue, sieving the mushroom residue by using a sieve with the aperture of 10mm, weighing the mineralized refuse siftage and the mushroom residue in a mass ratio of (2:1)-(5:1), mixing uniformly, adding inorganic salt nutrient solution, namely NMS in an amount which is 25 percent based on the mass of the mixture, regulating the water content to be between 45 and 55 percent, and culturing for 3 to 7 days to obtain the contaminated bottom sediment remediation agent. The using method comprises the steps of: weighing the contaminated bottom sediment remediation agent and the contaminated sediment, in which the concentration of the polycyclic aromatic hydrocarbons is 10 to 100mg / kg after the dehydration, according to a mass ratio of (1:5)-(1:10), mixing uniformly, naturally composting, and maintaining the water content of a heap to be between 30 and 32 percent, wherein the removal rate of the polycyclic aromatic hydrocarbons can reach 55 to 90 percent through detection. The source of raw materials of the remediation agent is wide, the cost is low, preparation cost is low, the remediation effect of the contaminated bottom sediment is high, the fertility of the bottom sediment is high, and the method is easy to operate and is suitable for treating bottom sediment contaminated by the polycyclic aromatic hydrocarbons on a large scale.

The invention discloses a contaminated soil / sediment remediation device, which utilizes an EF-Feox as the technical base and utilizes an EF-Feox reactor as a core component. The EF-Feox reactor consists of electrodes, a stirring motor, a chemical reagent inlet, a waste water / sediment inlet, a reflux sample inlet and an outlet. The contaminated soil / sediment remediation device is simple in operation and low in cost and has fine remediation effect to contaminated soil / sediment and wide applicable prospect.

The invention relates to the restoration technology of bottom mud in polluted water bodies, in particular to a method for preparing immobilized microbial particles with pottery beads as carriers. Specifically, the prepared seed solution is inoculated into the treated ceramic bead carrier, and under the condition of facultative anaerobic and constant temperature culture for 4-6 days, the adsorption, cultivation and proliferation are carried out 2-3 times, and the microorganisms immobilized are obtained. of ceramic beads. The invention specifically adopts inorganic carrier ceramic beads to adsorb and fix microorganisms, has fast adsorption speed to mixed bacteria, good multiplication effect, simple operation, no need to change natural environment and build large-scale structures, and does not generate secondary pollution. Putting the immobilized cell particles prepared by it into the nitrobenzene polluted water body-sediment environment can effectively remove nitrobenzene and aniline in the sediment. When the initial concentration of nitrobenzene and aniline in the sediment is 4.41mg / kg, 37.84mg / kg, the degradation rate of nitrobenzene can reach 100%, and the degradation rate of aniline is 66%. The pottery beads of the present invention are rich in sources and cheap in price.

The invention relates to soil and sediment remediation. The invention discloses a batch process of remediation of soil and sediment contaminated with toxic metals which is selected from the group consisting of Pb, Zn, Cd, Cu, Hg, Ni, Mo, Tl, Cr, U, Cs and Sr. In the method, apart from alkaline sedimentation of toxic metal hydroxide, toxic metals are removed from process solutions through alkaline adsorption of a polysaccharide adsorbent. Through application of alkaline adsorption, the efficiency of toxic metal removal from process solutions and alkaline and acidic recycling of chelating agent, i.e., EDTA, is significantly improved

The invention discloses a compound microbial preparation used for water body and sediment remediation and a preparation method thereof. The preparation method comprises the following steps: mixing pediococcus acidilactici, pediococcus pentosaceus, bacillus amyloliquefaciens, pichia pastoris and virgibacillus halodenitrificans in a mass ratio of 9 to 9 to (1-7) to (1-7) to (1-7) to prepare a compound biological preparation and then carrying out vacuum drying to prepare powder, thus obtaining the compound microbial preparation. The compound microbial preparation used for water body and sediment remediation can be used for closed water bodies and open water bodies, can achieve the effects of rapidly reducing sediment, improving the self-cleaning capacities of the water bodies and improving the water quality, can not cause secondary pollution, is suitable for pollution control and remediation of river water in cities and remediation of industrially polluted closed water bodies and can achieve the effects of improving microecosystems of the water bodies and restoring the biodiversity of the water bodies.

The invention discloses an in-situ restoring method for eutrophic water sediments. The method comprises the following steps that: the ozone and the calcium hydroxide solution act on a sediment-overlying water interface of sediments; by utilizing the strong oxidizing environment formed by the ozone, phosphorus nutrient salt released from the sediment-overlying water interface quickly reacts with deactivator calcium hydroxide to generate fixation reaction; a film is formed at the sediment-overlying water interface to further prevent the sediment from releasing the phosphorus nutrient salt to overlying water; and thus, the in-situ restoring of the eutrophic water sediments is achieved. Compared with the prior art, the invention has the advantages of low construction cost, quick effect, obvious sediment restoring effect, stable and lasting control effect, convenient operation, and low requirement on personnel and mechanical equipment and is favorable for wide popularization of the method.

The invention discloses in-situ sediment remediation equipment which comprises a heating device; a stirring device is fixedly installed on one side of the heating device; a pressurization system is arranged on one side of the stirring device; a control system is arranged on one side of the pressurization system; a pipeline system is fixedly installed below the heating device; an emptying device isfixedly installed below the pipeline system; an injection device is fixedly installed on one side of the emptying device; an anchoring device is fixedly installed below the injection device; and a lifting device is fixedly installed on one side of the anchoring device. The in-situ sediment remediation equipment provided by the invention can realize layering and zonal remediation of bottom mud, realizes combined remediation of the bottom mud and overlying water, can realize simultaneous remediation of various pollutants with one-time implementation, improves the bottom mud in-situ remediationefficient, is convenient for people to use and brings a better use prospect.

The invention relates to a plant biological adaptability recovery method of water-body compact bottom sediment, which comprises the following steps: after selecting the water plant species, respectively determining the recovery regions for emerged plants, floating-leaved plants and submerged plants according to the water depth distribution throughout the year; acquiring and analyzing the porosity of the surface sediment of each plant recovery region, and determining the bottom sediment biological adaptability remediation region; determining the compact bottom sediment remediation depth according to the water plant species, and selecting a carving component to geometrically carve the water-body bottom sediment, thereby destroying the appearance morphology and the bedding structure; and finally, growing the water plants on the bottom sediment of the plant biological adaptability recovery region. In the compact bottom sediment water area, the water-body bottom sediment is manually carved according to the natural conditions and the characteristics of the water plants to increase the porosity, thereby improving the surface bottom sediment, promoting the apposition growth and fixation, and further realizing the water plant recovery of the water body.

The invention belongs to the technical field of soil or sediment repair, in particular to a method for promoting polychlorinated biphenyl degradation by zero-valent iron. According to the method, a compounded formula of an anionic surfactant and a nonionic surfactant such as polyoxyethylene is added, mobility of the hydrophobic pollutants, namely polychlorinated biphenyl, in the soil or the bottommud can be improved, so that the polychlorinated biphenyl is promoted to be in contact with the zero-valent iron and is degraded by the zero-valent iron. Compared with the treatment that no surfactant is added and only the anionic or polyoxyethylene nonionic surfactants are added, and degradation efficiency of the polychlorinated biphenyl can be remarkably improved by adding the mixed surfactant;and compared with other improved zero-valent iron technologies, the method is simple and feasible, is low in cost and is suitable for repairing a large amount of the polluted soil or the bottom mud.

The invention relates to the field of water environment treatment conducted by microorganisms, in particular to a method for repairing sediment pollution in an open sea area or a deep freshwater area, a river mouth and the like. The method comprises the steps: loading a bacterial strain with zeolite, coating with a flocculating agent and putting the coated bacterial agent into a to-be-treated water area so as to repair sediment petroleum and organic pollutants in the water area. The method mainly aims at the seawater / freshwater area with the water depth being 2 to 50 meters and has a good effect of repairing the sediment petroleum pollution and other organic pollution. The method is integral in system and simple in operating method, has the remarkable effect of repairing the sediment, no secondary pollution and high offshore construction safety, and is particularly suitable the special-function sea areas such as a petroleum exploitation area and an aquaculture area, and can guide implementation of sea sediment pollution repair engineering.

The invention relates to a method used for surface water polluted sediment remediation and nutrient release control. On the one hand, the invention provides zeolite modified by zirconium and calcium, the zeolite modified by the zirconium and the calcium is an absorption agent which can remove the phosphate in water in a more effective manner as compared with the zeolite modified by the zirconium or the zeolite modified by the calcium, and a synergic effect on the phosphate absorption effect of the zeolite is achieved due to the fact that the zeolite is modified by the zirconium and the calcium; on the other hand, the invention combines the aeration technology with the improvement technology of the zeolite modified by the zirconium and the calcium, the combination is hard for technicians in the field to imagine, polluted sediment can be well remedied, and sediment pollutant release can be well controlled.

The invention discloses a riverbed sediment in-situ remediation blanket which comprises a sediment remediation layer, an aquatic plant layer and a matrix layer. The matrix layer is fixedly arranged onthe sediment remediation layer, and the aquatic plant layer grows on the matrix layer; the sediment remediation layer comprises a supporting framework and a remediation agent layer wrapping the supporting framework. The invention further provides a riverbed sediment remediation method. Secondary pollution caused by riverway dredging can be effectively avoided, meanwhile, damage to ecological balance of sediment is avoided, a silt layer is reduced, the reservoir capacity of a riverway water body is increased, purification of riverbed sediment is improved, and therefore the effects of shortening the treatment period and obviously improving riverbed sediment remediation are achieved.

The invention provides a method for promoting restoration of phenanthrene-polluted estuary and tidal flat sediment by utilizing disturbance of thick crabs, the thick crabs are put into a phenanthrene-polluted sediment layer, and the inoculation density of one thick crab is 200-500 cm<2>. Under the condition that the phenanthrene concentration is 450-1000 mg / kg, the phenanthrene degradation rates of upper sediments (15 cm or above) are 36+ / -3%, 68+ / -4% and 75+ / -2% respectively in 14 days, 35 days and 56 days. The degradation rates of lower sediments (below 15cm) are 11+ / -3%, 15+ / -4% and 27+ / -2%respectively; and the improvement efficiency of the disturbance of the thick crabs on phenanthrene degradation is obvious. In addition, compound baits containing 0.25-1.0 g of dry leaf powder and humus are put into each living crab every week, so that the degrading and repairing effects can be greatly improved.

The invention discloses an in-situ remediation method of black odor sediment in a contaminated static water body. The in-situ remediation method is characterized by comprising the following steps: preparing a compound microbial preparation; pretreating the compound microbial preparation to obtain a diluent; adding the diluent, wherein one construction period lasts 30 days, and the diluent is addedonce every 5-7 days and 3-5 times every month. By the in-situ remediation method, the way of material transfer and exchange between the sediment and the water body is changed, and influence of changeof the water body and a biological chain in the water body on the sediment in the sediment remediation process is reduced.

The invention relates to the technical field of ecological environmental protection, in particular to an ecological island and reef with a sediment remediation function. The ecological island and reefcomprises a remediation belt, wherein the remediation belt surrounds the island and reef, and the remediation belt comprises a planting layer, a stabilizing layer, a water film layer, a transition isolation layer and bottom sludge in sequence from top to bottom; the bottom sludge is used for providing nutrition for plants; the sludge is isolated from the planting layer by the transition isolationlayer; the water film layer is used for ensuring that a water body which enters the planting layer does not contain foul gas; a planting foundation is constructed for the planting layer by the stabilizing layer; and the planting layer is made of emergent aquatic plants and submerged plants, various fertilizers which are beneficial to plant growth are released by the sludge under the decompositioneffect of biological stuffing, deodorization is performed through a water film and the stabilizing layer, the peculiar smell of water on a water surface is reduced, finally, nitrogen, phosphorus andthe like are fixed under the decomposition effect of various plants, and environment pollution is prevented, so that the ecological island and reef is constructed.

The invention relates to a medicament for in-situ remediation of black and odorous water bottom mud medicament, and a preparation method and an application thereof. The medicament mainly comprises 20-35 wt% of zero-valent iron, 5-10 wt% of a copper salt, 10 wt% of water glass, 25-40 wt% of a peroxide, 10-15 wt% of saccharides, 5 wt% of a NaY molecular sieve and 10-15 wt% of water. The invention also provides a preparation method of the black and odorous water bottom sediment remediation agent. The preparation method comprises the following steps: dissolving the copper salt in a small amount ofwater, and pouring the obtained solution into a beaker filled with the zero-valent iron to obtain a mixed solution A; then adding a small amount of water into the saccharides, and pouring the obtained solution into a beaker filled with the peroxide to prepare a mixed solution B; mixing the mixed solution A with the mixed solution B, adding a water glass solution and the NaY molecular sieve, and performing continuous stirring; and finally, granulating the obtained mixture through a granulator to obtain the medicament. The medicament has the advantages of simple preparation process, good remediation effect, overcoming of the generation of black and odorous gases such as hydrogen sulfide, and good application prospect.

The invention belongs to the technical field of environmental protection equipment, and particularly relates to a self-cruising bottom mud elution and ecological restoration platform which comprises an energy conversion and supply unit, an automatic cruising unit, a stirring gravity separation unit, a centrifugal solid-liquid separation unit and a pollutant adsorption and purification unit. Large particles are precipitated under the action of gravity, fine particles and suspended solids which are easy to adsorb pollutants float upwards, the centrifugal solid-liquid separation unit performs centrifugal separation and removal on supernatant which is rich in the fine particles and suspended solids of the pollutants under the centrifugal action, and the pollutant adsorption and purification unit purifies a water body which is subjected to centrifugal differentiation. The device and the method are suitable for field eutrophication or heavy metal pollution lake sediment remediation, have the characteristics of high intelligent degree, green and convenient energy source, wide cleaning area, high elution efficiency and the like, and enable sediment elution and ecological remediation to be more economical and intelligent.

The present invention relates to soil and sediment remediation. The present invention discloses a batch method for remediation of soil / sediments contaminated with toxic metals selected from the group consisting of Pb, Zn, Cd, Cu, Hg, Ni, Mo, Tl, Cr in a serial batch process , U, Cs and Sr group. In the method of the present invention, toxic metals are removed from the treatment solution by alkaline adsorption of polysaccharide adsorbents in addition to alkaline precipitation of toxic metal hydroxides. By applying alkaline adsorption, the efficiency of acidic and alkaline recycle for removal of toxic metals and chelating agent, ie EDTA, from the treatment solution is significantly improved.

The invention relates to the technical field of environmental remediation and sewage treatment, in particular to a directional amplification method for bioremediation of indigenous microorganisms in rivers and lakes and application of the directional amplification method. According to the invention, three indigenous microorganism functional florae, i.e., nitrifying bacteria florae, aerobic heterotrophic florae and denitrifying bacteria florae, are screened through directional amplification and enrichment, and are applied to water quality purification and ecological restoration of rivers and lakes in combination with technologies such as river aeration and bottom mud bioremediation. The indigenous microbial preparation is taken from river sediment, is high in adaptability, can be directly planted in functional microbial populations or communities of ecological systems of rivers and lakes, realizes high-efficiency water purification and sediment remediation, and is good in effect persistence; no biological safety problem exists, and the problems of biological invasion, ecological risks and the like do not exist; the method is low in production price, can be widely applied to black and odorous riverway treatment and urban riverway water quality improvement, and can be matched with riverway aeration, bottom mud bioremediation and other technologies according to specific conditions to achieve one-river-one-strategy and one-river-one-bacterium effects and improve the riverway treatment efficiency.

The invention discloses a method for evaluating restoration effect of polluted sediment used for limnodrilus hoffmeisteri. The method comprises the following steps: S1) pre-culturing deposit sediment,adding a restoration material, and performing simulated restoration; S2) separating the limnodrilus hoffmeisteri in the natural deposit sediment, and performing laboratory culture and adding the material in the repaired deposit sediment; and S3) after culture for 28 days, screening the limnodrilus hoffmeisteri to obtain the survival limnodrilus hoffmeisteri, wherein feeding and water change are not required during a culture process, and obtaining an effect assessment parameter of the deposit sediment through counting of number of limnodrilus hoffmeisteri, weighing and larva quantity. The method is used for restoration and assessment of the deposit sediment, and can effectively solve the disadvantages of complex operation and over-high cost of the method for evaluating effect of the waterenvironment sediment after restoration.