664 results about "Eutrophic water" patented technology

The invention discloses a method for biologically remediating a water body and soil comprehensively utilizing resources. The method comprises the steps: (1), determining main pollutants in a selected land area or water body area; (2), selecting to plant and / or cultivate fast-growing herbaceous plants, fast-growing alga, trees, bushes, fungi or microorganisms with high remediation efficiency in the selected land area or water body area; (3), harvesting or collecting the fast-growing herbaceous plants and the fast-growing alga after growing to reach a suitable height or size; (4), concentratedly processing the harvested or collected fast-growing herbaceous plants and the fast-growing alga, and comprehensively utilizing to prevent the pollutants from dispersing; (5), remediating an eutrophic water body by adopting an artificial floating island; (6), remediating a heavy metal polluted water body by confining floating plants; (7), repairing cadmium and zinc polluted soil by mixed-cropping festuca arundinacea and bluegrass; (8), remediating polycyclic aromatic hydrocarbons (PAHs) polluted soil by mixed-cropping alfalfa and italian ryegrass; and (9), extracting and recovering silver from silver-containing wastewater remediation plants.

Provided herein are systems and methods for sustainable aquaculture. The methods provided herein allows recovery and / or recycling of autochthonous nutrients in fish farming, and recovery of allochthonous nutrients present in eutrophic water. The systems provided herein comprises two closely spaced cages, an array of rotary panels that regulates the flow of matters between the two cages; and a means for producing a directional water current.

A composite adsorbent of attapulgus clay-aluminum hydroxide / iron nano-scale and a preparation method and application thereof are provided. The composite adsorbent is characterized in that prepared by loading aluminum hydroxide or mixture of hydroxides of aluminum and iron on the surface of attapulgus mineral, the aluminum hydroxide or the mixture of hydroxides of aluminum and iron has a content of 5-50wt% in the adsorbent; and the content of aluminum hydroxide in the mixture is not lower than that of iron hydroxide. The composite adsorbent has high adsorption capacity to P, As and F in water, and can be used for deep dephosphorization treatment of waste water from domestic sewage treatment plants, dephosphorization of eutrophic water bodies and treatment of high-As or high-F ground water.

The invention relates to an environmental engineering and water treatment technology and aims to provide a self-sustaining type landscape restoration ecological floating island device. The device comprises floating beds, floating islands which consist of aquatic plants planted between the floating beds, photocatalysis ribbons, and aeration devices which supply power by using solar systems; and each photocatalysis ribbon comprises a horizontal loading main body which is submerged below a water surface, a plurality of holes for circulating water bodies are distributed at the bottom of each photocatalysis ribbon, a carrier material loaded with a photochemical catalyst is fixed on the surface of each photocatalysis ribbon, and an overflow weir is arranged at the periphery of each photocatalysis ribbon. Each aeration device comprises an aeration pipeline and a motor. The organic matter and nitrogen and phosphorus are removed from eutrophic water by combining a photocatalysis technology, an ecological floating island technology and a solar energy technology; nitrate nitrogen and ammonia nitrogen are converted into nitrogen by the photocatalysis technology simultaneously; the accumulation of nitrogen pollutants is reduced, and nitrate is prevented from being converted into nitrite or ammonium; and dissolved oxygen in the water body is increased by using the aeration devices, and the self-purification capacity of the water body is improved, so the aim of restoring the eutrophic water well is fulfilled.

The invention relates to systems and methods for regulating algal biomass in offshore waters near an oil and gas production platform. The systems of the invention encompasses a plurality of modules for managing nutrients, algae, and aquaculture, including enclosures for containing aquatic organisms, and various operating subsystems that are operably associated with surface and underwater structures of the platform. In one embodiment of the invention, aquatic organisms are cultured in eutrophic water to feed on algae, thereby reducing the algal biomass. In other embodiments, the diversity of algae in an algal bloom is modified and the productivity of oligotrophic water is increased.

A process for restoring the ecological environment of a nutrient-enriched shellow water body features that the pioneer plant for improving the water transparency and the multiple submerged plants are introduced to said water body to create a stereo evergreen aquatic vegetation system, which includes also emerging plant, floating plant, leaf-floating plant and submerged plant. Its advantages are durable and high effect, and low cost.

The invention discloses a nitrogen and phosphorus absorbing agent which comprises the following raw materials in parts by mass: 100 parts of olefin monomer, 80-200 parts of attapulgite clay, 5-20 parts of auxiliary raw material, 0.05-4.0 parts of initiator and 0.05-6.0 parts of cross-linking agent. The nitrogen and phosphorus absorbing agent forms a granular product in a reaction process, is simple in preparation process and post-treatment process, has no secondary pollution, is mainly used for treating lake eutrophic water, and can also be used for purifying water bodies of life wastewater, food wastewater, animal husbandry wastewater and the like.

A pond-lake heavy-metal pesticide fertilizer pollutant solidifying removing agent relates to the technical field of disinfectants, and is composed of the following raw materials: 450-600 parts of montmorillonite, 150-300 parts of silicate clinker, 80-150 parts of quicklime, 50-100 parts of modified starch, 10-30 parts of plaster, 3-6 parts of glucoside, 5-10 parts of alum, and 3-8 parts of calcium chloride. The beneficial effects comprise that the employed raw materials are abundant and cheap, the preparation technology is simple, the agent is applicable to pollution cleaning of large-scope water body of ponds, lakes and rivers, is capable of rapidly thoroughly eliminating organic harmful substances, chemical pesticides and harmful microbes and heavy metals in water body, has improving eliminating effect on total phosphorus and total nitrogen in eutrophic water, has growth-controlling effect on algae in water body, and has water-bottom anti-permeation effect and effect of preventing heavy metals from permeating and polluting water resource.

The invention discloses a kieselguhr modified adsorption material and a preparation method and application thereof. The kieselguhr modified adsorption material is formed by directly loading ferric hydroxide solution on the acid-washed pretreated raw kieselguhr and drying the kieselguhr. Through the kieselguhr modified adsorption material, the modified kieselguhr micropores and the surface roughness are obviously changed, the specific surface area is enlarged by 10 times, H<+> of ferric hydroxide loaded on the kieselguhr has extremely strong affinity with O<2-> in the structure in the solution of low pH value range, and Fe<3+> is released to the solution, so that the solubility of the adsorption material is increased, the adsorption capacity is enhanced, and the adsorption material is suitable for decontamination research of meta-acid water and has potential application value in the treatment of eutrophic water of Pearl River valley. The preparation method for the kieselguhr modified adsorption material is convenient for operation, simple in process and low in cost. The kieselguhr modified adsorption material is convenient and practical in application.

The invention relates to a method and fluidized bed for purifying eutrophic water by using microorganism filler. The method for purifying the eutrophic water by using the microorganism filler comprises the following steps: (a) immobilizing anaerobic bacteria in a material by using an embedding method to form filler particles of which the particle size is 5mm to 10mm; (b) coating the outer layers of the particles with mixed facultative aerobe and aerobic bacteria by virtue of chitosan so as to prepare layered and immobilized microorganism filler for purifying water, wherein the particle size of the microorganism filler is 15mm to 20mm; (c) putting the microorganism filler into a microorganism fluidized bed and fixing the fluidized bed at the tail part of a pleasure boat or close to flowing water so that the flowing water flows through the microorganism filler in the fluidized bed and the microorganism filler can be used for removing organic matters, nitrogen and phosphorus out of the eutrophic water body. Therefore, the utilization rate of oxygen, the mass transfer efficiency of organic pollutants in the water and the like are greatly improved; in addition, aged biological membranes can easily fall off from the surface of the filler, so that the membranes are renewed conveniently and the activity of the membranes is maintained.

The invention discloses a water cultivation method of herbs to treat eutrophic water, comprising the steps: PVC plastic tubes are taken as a frame, a nylon net is bound on the frame to form a floating bed; seeds of grass species are soaked for accelerating germination at a room temperature of 28-32 DEG C, the seeds after germination are sowed in a seedling bed formed by a PE membrane with even eyelets to keep the moisture content and temperature, facilitating the germinated seeds to take root and grow; the seedling bed is put on the floating bed that floats in the eutrophic water after the roots of the grass species grow into three-leaf seedlings and come out through the eyelets of the PE membrane, then nutrient salts of nitrogen and phosphors, etc. in the water body are absorbed by the herbs, meanwhile, allelochemicals are secreted to inhibit the propagation of algae, so as to realize in-situ bioremediation of the eutrophic water and promote feed production when improving the water quality. The whole treating method realizes a good circulation system between 'environment-plant-animal-human'.

An ecological technology for treating the nutrients-enriched water polluted by blue alga features that the water hyacinth is cultured in the water by a certain density and then periodically collectedin its growth phase. Its advantages are high effect and low cost.

The invention relates to a soft plant floating bed which is applied in revetment and water purification, which is a composite plant cultivation apparatus on water that adopts a disk-shaped single floating bed as one unit, wherein, a plurality of hygrophytes or amphiphytes are cultivated in the floating bed to form a floating bed that can float in the water; meanwhile, the aim of in-situ remediation and the control of the eutrophic water can be reached by using the plant to provide the biological cleaning function on the eutrophic water in lakes, rivers and channels. The main characteristics or effects of the floating bed are that: 1. the invention is used for acting the biological purification on eutrophic water in different waters; 2. one end of the floating bed is fixedly connected to the bank, which provides protection to the hydro-fluctuation belt and bank of reservoirs, lakes, rivers and channels. When the water level rises, the plant in the floating bed which grows on the water can absorbs the water nutrition enrichment to decrease the eutrophication degree; when the water level decreases, the floating bed covers the hydro-fluctuation belt to provide wave absorption and a protection layer for the bank.

The invention discloses a submerged plant planting matrix and a device utilizing submerged plants to restore eutrophic water. The submerged plant planting matrix comprises raw soil, rubble and coconut chaff. The raw soil, the rubble and the coconut chaff are mixed according to the weight ratio of (0.5-1.5): (0.5-1.5): (2-5), the planting matrix is beneficial for plant growth and has an ecological restoration function. The device utilizing the submerged plants to restore the eutrophic water comprises planting boxes, submerged plant planting layers, submerged plants, pull ropes, fixing piles and pulleys; the device has the good effect of restoring the eutrophic water, and is firm in structure, capable of being applied to the eutrophic water environment with low water transparency, frequent water level changes, much nature convulsion, hard bottom materials and the like which are bad for growth of submerged plants, wide in application range and high in adaptability.

The invention relates to systems and methods for reducing algal biomass in eutrophic water, wherein organism that feed on algae are introduced into the eutrophic water and cultured in the eutrophic water, until the algal biomass is reduced or the organisms have reach desirable size. The body of eutrophic water can be restocked with juveniles after harvesting. The organisms can be fishes and / or shellfishes. The methods further comprising producing biofuel, specialty chemicals, nutraceuticals, food, and / or fish meal from the harvested fish.

The invention discloses an algous cathodal double-chamber microbiological fuel cell and application thereof, which belong to the field of biological cells. The double-chamber microbiological fuel cell comprises an anodal chamber and a cathodal chamber, in which electrolyte is loaded. The anodal chamber is inoculated with anaerobic sludge, and the cathodal chamber is inoculated with blue-green algae and irradiated by a light source. The algae are suspended in the cathodal electrolyte, the biomass of the algae is far more than the biomass of the algae attached on the electrode, and thereby the photosynthesis of the algae can be utilized to release more oxygen. While having the function of treating anodal waste water, the invention also can directly utilize a large quantity of blue-green algae and the like in eutrophic water body, consequently, the treatment cost is greatly reduced, pretreatment is not needed, and therefore the invention has good economic benefit and application prospect.

The invention discloses a preparation method of a modified fly ash adsorbent, comprising the following steps of: 1) pre-treating a raw material, i.e., fly ash; 2) performing thermal modification treatment on the fly ash; 3) preparing a modified fly ash body; and 4) mixing the fly ash and an adsorbent aid and granulating to obtain the modified fly ash adsorbent. The adsorbent can be used for treating elements of nitrogen and phosphorus in a eutrophic water body. The adsorbent synthesised by the preparation method of a modified fly ash adsorbent disclosed by the invention has the advantages of being simple in operation, economic and rapid, high in synthesis safety, less in environmental pollution and the like, can be used for treating domestic sewage and industrial sewage containing nitrogen and phosphorus, thereby opening up a new development prospect for reasonable utilization of resources and economic and rapid treatment of sewage containing nitrogen and phosphorus.

The invention discloses a method for reconstructing submerged plant communities of lakeside wetland and controlling water quality purification. The method comprises the steps of monitoring and analyzing the water quality purification capacity and the community change rule of water plants in an ecological restoration area of a lakeside wetland, and determining some kinds of water plants with high-intensity purification and survival ability to serve as pioneer species; determining which kind of season dominant species to which the pioneer species belong respectively, and constructing submerged plant communities of the lakeside wetland through reasonable matching of different season dominant species; quickly cultivating the pioneer species on a large scale in the ecological restoration area of the lakeside wetland to realize purification control of water quality. Compared with the prior art, by adopting the method disclosed by the invention, the amount of the submerged plant communities of the lakeside wetland can be effectively controlled, and the stability of a plant cover in an eutrophic water body is maintained, so that the method is of great significance to ecological restoration of the eutrophic water body; moreover, the method disclosed by the invention is technically reliable, simple and feasible in operation and low in cost.

The invention discloses a slow-release microorganism microbial inoculum for government of a black and odorous water body and a preparation method of the slow-release microorganism microbial inoculum.The slow-release microorganism microbial inoculum comprises the preparation raw materials of microorganism microbial liquid, an adsorption agent, an activator and an entrapping carrier. The slow-release microorganism microbial inoculum has various microorganism kinds, and is high in microorganism loading quantity, coexistent and alternative in microorganisms, long-acting in stability, shock-resistant, free from secondary risks, high in removal efficiency of pollutants and the like. When being applied to the black and odorous and eutrophic water bodies, the slow-release microorganism microbialinoculum can rapidly adapt to environment, the activator can promote quick propagation of the microorganisms, pollutants in the water bodies can be effectively removed, COD, NH3-N, TP and total nitrogen in the water bodies are effectively reduced, odor taste of the water body is eliminated step by step, and the transparency of the water bodies is improved.

The invention relates to a eutrophic water source in-situ remediation device and method. The device is an integrated buoy type solar driven stream-making aerator. The aerator comprises a solar cell system, a suspended carrier, a guide cylinder, an aeration system and a positioning system, wherein the solar cell is pyramidal and on the upper part of the suspended carrier; the lower part of the suspended carrier is integrated with the guide cylinder to provide buoyancy for the device; the cavity of the carrier is provided with an air pump, the solar cell is on the upper surface of the carrier; an aeration disc is at the bottom of the inside of the guide cylinder and connected with the air pump through an air delivery pipe; and the guide cylinder is provided with a water inlet and a water outlet correspondingly. The aerator uses the solar cell for power supply, thus the efficient oxygenation of the stream-making aerator can be effectively realized without causing secondary pollution, the outbreak of algae in the polluted water body can be controlled, the decomposition of organic substances in a water body can be promoted, the water body can be remedied and a self-cleaning function can be realized. The integrated buoy type structure floating on the water surface does not occupy land, has a compact structure and a small volume and is easy to transport and install.

The invention discloses a eutrophic water in-situ remediation device which is simple in structure, convenient to use, light in weight and capable of avoiding secondary pollution. The device comprises a solar cell panel, a storage battery, an air pump, a controller, a time switch, a guide cylinder, a suspension carrier, an aeration disk, a biological floating island, an air guide pipe and a lead screw, wherein the lower portion of the suspension carrier is communicated with the guide cylinder under the influence of the lead screw and provides main buoyancy by the aid of a floating island system, the air pump is installed in the cavity of the carrier, a solar cell is located on the upper surface of the carrier, the aeration disk is arranged at the bottom of the guide cylinder and is connected with the air pump through the air guide pipe, and both the upper portion and the lower portion of the guide cylinder are designed into an expanding shape. According to the device, the solar cell is used, driving, flow production, aeration and oxygen filling are achieved under the condition of no secondary pollution, the algae outbreak is prevented, the organic-matter degradation of water is promoted, the biological floating island comprises aquatic plants, special strains and fillers, and the in-situ remediation of water is achieved.

The invention relates to a method for planting vegetables in eutrophic water in a floating way. The method comprises the following steps: selecting a vegetable planting area; (2) detecting the quality of water in the vegetable planting area; (3) tidying the vegetable planting area; (4) selecting the variety of vegetables which are suitable for being planted in different seasons in turns; (5) selecting the variety of vegetables; (6) installing foamed floating vegetable planting beds; (7) preparing a matrix which comprises a component A, a component B and a component C; (8) breeding small vegetable seedlings in a vegetable seedling breeding house; (9) breeding the small vegetable seedlings in a floating way; (10) transplanting the small vegetable seedlings to planting holes of the foamed floating vegetable planting beds, fixing by the matrix, putting the foamed floating vegetable planting beds, in which vegetables are planted, in a selected water area in the vegetable planting area, arranging orderly, leaving working channels and fixing the small vegetable seedlings with rods; (11) managing: when nitrogen, phosphate and potassium in cultivating water are decreased, discharging a part of low-nutrient water and adding eutrophic water so that the nitrogen, phosphate and potassium in the cultivating water are increased; (12) harvesting; and (13) detecting to see whether the vegetables are in line with national related standards. The eutrophic water area is fully utilized to cultivate traditional excellent vegetables popular to people for people, and the eutrophic water quality is also improved effectively. The method adopts the scientific production process and the advanced technology and is a novel method for planting vegetables.

The invention relates to preparation and application of a modified magnetic straw anion adsorbent. The preparation method is characterized in that the modified magnetic straw anion adsorbent is prepared in the presence of a N,N-dimethylformamide medium by taking crop straws, epoxy chloropropane and triethylamine as main raw materials, taking a bivalent iron salt and a trivalent iron salt as magnetic reagents, and taking ethidene diamine as a crosslinking agent. The novel modified magnetic straw anion adsorbent prepared by the method has the advantages of simple production process, low cost, simple solid-liquid separation, simplicity in modification, high mechanical strength, wide application range, good adsorption effect, high secondary pollution adsorption amount, particularly has high adsorption amount on Cr (VI) ions and is uniform in magnetic particle attachment, large in specific surface area and high in adhesive force. The adsorbent can be widely applied to various contaminated water bodies containing various anions, such as a eutrophic water body, chromium-containing wastewater, printing and dyeing wastewater and other contaminated water bodies.

The invention provides a constructed wetland matrix filling material for simultaneous nitrogen and phosphorus removal and its preparation method. The raw materials of the filling material comprise modified fly ash, fly ash, cement and water. The modified fly ash, the fly ash and the cement are in a weight ratio of 20-60:20-60:20-30, and the water content accounts for 30%-100% of the total weight of the modified fly ash, the fly ash and the cement. The modified fly ash is prepared by: mixing fly ash and a sodium hydroxide solution with a concentration of 2-5mol / L in a weight ratio of 1:6-10, then heating and stirring the mixture in a closed container at a temperature of 100DEG C for 24-48 hours, carrying out centrifugal separation, then washing the obtained solid material repeatedly till pH of 7, drying the solid material in an oven and making it into powder. The constructed wetland filling material provided in the invention has excellent purification effects on nitrogen and phosphorusat the same time, can be used for treatment of eutrophic water bodies and treatment of agricultural non-point source polluted water bodies, and can meet the demands for further removal of nitrogen and phosphorus from secondary effluent of a sewage treatment plant.

The invention belongs to the field of photocatalytic environmental protection, and particularly relates to a preparation method and application of a g-C3N4 / BiOI composite visible light catalytic material for carrying out photocatalytic degradation on microcystin. Photocatalytic degradation on organic pollutants has been generally recognized as one of green environment purification technologies with the widest prospect. Compared with a conventional treatment process, a technology for carrying out photocatalytic degradation on the microcystin, which is adopted by the invention, has the advantages of no secondary pollution, complete removal on pollutants, safety, stability, low cost and the like, has an obvious degradation effect on toxic organic pollutants which take microcystin (MC-LR) as the representative, and has no related research results reported publicly. According to the invention, by adopting a solid-phase calcination method, a novel narrow band-gap semiconductor BiOI and nonmetal organic semiconductor graphite-phase carbon nitride (g-C3N4) are compounded to prepare the g-C3N4 / BiOI composite visible light catalytic material; the composite material can effectively expand a spectral response range, promote separation and transfer of semiconductor photo-induced electron-hole pairs, reduce the compound probability of the semiconductor photo-induced electron-hole pairs and improve photocatalytic efficiency. The preparation method disclosed by the invention is simple in preparation process, mild in condition, high in stability and low in cost, and can efficiently utilize solar energy; the prepared composite photocatalytic material can be applied to the field of treatment on eutrophic water, and has high practical value and wide application prospect.

The invention discloses sludge-zeolite water purification type ecological concrete and a preparation method thereof and belongs to the technical field of environmental engineering water body remediation. The preparation method is characterized by comprising the following steps: by taking sludge, natural zeolite, cement, water and a water reducing agent as raw materials of concrete, uniformly stirring, performing casting molding by utilizing a forming die, and curing for not less than 28 days under natural conditions to obtain an ecological concrete product, wherein the ecological concrete has crunchy rice candy-shaped continuous connected structure pores and is suitable for river slope protection, greening and the like. The sludge-zeolite water purification type ecological concrete and the preparation method thereof have the beneficial effects that the preparation process is simple, the finished product is low in price, common natural gravels are replaced by using zeolite, the adsorptive property of the concrete is enhanced, the concrete is recycled by adding the sludge, N, P and K can be slowly released due to sludge solidification, microbial biofilm formation growth is promoted, and the ecological concrete has wide application prospects in ecological river slope protection, eutrophic water body purification and river bank greening.

The invention relates to a treatment device for a eutrophic water body, in particular to a combined bio-floating bed. The bio-floating bed comprises a bed body which is formed by connecting a plurality of floating bed single bodies and an aeration cavity in the bed body, wherein an aeration device is arranged in the aeration cavity. According to the combined bio-floating bed, a minitype aquatic ecosystem is built through increasing dissolved oxygen in the water body, introducing aquatic plants and increasing population and quantity of microorganism, nitrogen and phosphorus nutrients in the eutrophic water body in an urban landscape can be stably and effectively removed, and a new process is provided for water quality preservation in the northern urban landscape water body which takes tail water of an urban sewage treatment plant as the main nourishment source.

The invention discloses drilling geophysical prospecting advanced detecting device. A first probe wire and a second probe wire are arranged inside a probe of the device, one end of the first probe wire is connected with the signal input end of a first electric brush ring, the other end of the first probe wire is connected with the high-potential signal output end of a first signal sending module, one end of the second probe wire is connected with the signal input end of a second electric brush ring, the other end of the second probe wire is connected with the high-potential signal output end of a second signal sending module, a metal conductive rod is connected with a zero-potential interface of the first signal sending module and a zero-potential interface of the second signal sending module respectively, the current signal input end of a first signal receiving module is communicated with the first probe wire, the current signal input end of a second signal receiving module is communicated with the second probe wire, and the signal output end of the first electric brush ring and the signal output end of the second electric brush ring are connected with the inner wall of a drill stem. The drilling geophysical prospecting advanced detecting device can conduct fine and effective detection prediction on harmful geologic bodies of eutrophic water and water conduction channels around drilled holes of tunnels and roadway heads.