239 results about "Land treatment" patented technology

This invention relates to a combined vertical flow-vertical deflection wet land treatment technique for domestic wastewater. The technique comprises a pretreatment system and an artificial wet land system. The pretreatment system is mainly aim to removing the floating matters and precipitable suspended matters in domestic wastewater. The artificial wet land system is composed of combined vertical flow-vertical deflection in series. The invention has high removing rate on COD, N and P in domestic wastewater.

The invention relates to a reclamation method of subsided farm land after an earthquake disaster, belonging to the technical field of environment, ecology and waste land treatment and utilization. The method comprises the following steps of: carrying out surface soil peeling on subsided farm land caused by earthquake; filling and primarily shaping the peeled subsided area; carrying out insulating material covering and laminating on the primarily shaped subsided area; covering soil on the subsided area covered by the insulating material to further shape; and carrying out a biological improvement project on the soil covered and shaped subsided area. The invention ensures that the land damaged by the earthquake can be recycled and reach a higher production level as soon as possible so as to form a stale self-sustaining farm sustaining system, improve the microorganism contents of the soil, improve the physical and chemical properties of the soil and form a benign ecological system circulation.

The invention discloses a desertificated land treatment method for a windy and sandy area in an arid desert. A four-zone integrated wind prevention and sand stabilization forest system consisting of a wind prevention and sand resistance forest zone, a sand stabilization forest zone, a plant living sand-barrier sand resistance zone and a sand-sealing afforestation and lawn cultivation zone is arranged on the windward side on the front rim of a farmland. An artificial wind prevention and sand stabilization style combining resistance, stabilization, secondary resistance and sealing is formed on the rim of a new oasis, so that quicksand around the new oasis can be effectively prevented from invading the farmlands and villages; meanwhile, sand impact and sand cutting, which are caused by wind-sand flow which passes by, to crops are alleviated; the desertificated land treatment method has an obvious protection effect, is novel in design, is an extremely good innovation scheme and has an extremely good market popularization prospect.

The invention relates to an An/O type composite artificial wetland system for the enhanced treatment of low-C/N ratio wastewater. The invention relates to a wastewater treatment apparatus, which is a land treatment apparatus suitable for treating low-C/N ratio wastewater and recycling treated water. According to the An/O type composite artificial wetland system, wastewater sequentially flows through a horizontal subsurface flow wetland and a vertical subsurface flow wetland, effluent water part then flows back into the horizontal subsurface flow wetland, and a dissolved oxygen (DO) gradient is utilized to couple aerobic ammonia-oxidizing bacteria (AOB), nitrite-oxidizing bacteria (NOB) and anammox in the vertical subsurface flow wetland by means of effluent water level regulation in order to enhance the low-C/N ratio wastewater denitrification efficiency of the An/O type composite artificial wetland system. Broken bricks, oyster shells and other packing with large specific surface area, high porosity and good adsorbability are filled in the composite artificial wetland system, consequently, the amount of organisms held by the system is greatly increased, and high phosphorus-and-nitrogen-removing efficiency is guaranteed. The An/O type composite artificial wetland system has the advantages of simple structure, multiple functions, high efficiency, low cost and the like, is easy to operate and manage, can stably operate, and can synchronously remove carbon, nitrogen and phosphorus, the treated effluent water can be directly recycled, landscape plants can be planted on the ground surface, and the An/O type composite artificial wetland system can be combined with ecological construction and city and town greening functions.

The combined process of reinforced biochemical flocculation and artificial wet land treatment of sewage includes the following steps: A. pre-treatment through eliminating large solid foreign mater in lattice, collecting to well and pumping to the regulating pond for homogenizing; B. reinforced biochemical flocculation inside reaction pond with flocculant and coagulant in concentration 0-100 mg/L and sludge-water separation in settling pond; and C. artificial wet land treatment with exhaust reaching the discharge or reuse standard. The present invention has the advantages of no jamming of artificial wet land, greatly raised surface treating load, reduced covered area of artificial wet land, and low sewage treating cost, etc.

The invention discloses a method for treating waste pollutants in a pig farm. The method comprises the following steps of: A, performing anaerobic treatment on a biogas generating pit, namely building the biogas generating pit, performing anaerobic treatment on waste pollutants, which enter the biogas generating pit, in the pig farm, and killing parasites and pathogenic microorganisms through anaerobic fermentation, wherein the chemical oxygen demand (COD) content is reduced, and the normal growth of aquatic plants in a wet land is facilitated; B, performing primary ecological wet land treatment, namely planting green watermifoil, growing the green watermifoil, absorbing nitrogen and phosphorus, harvesting the watermifoil as materials covering a tea yard and a fruit yard; C, treating secondary wet land treatment, namely planting perennial bengal waterdropwort herb in winter, planting aquatic water spinach in summer, and harvesting the water spinach and the perennial bengal waterdropwort herb from the wet land each year; D, treating a tertiary economical wet land, namely planting perennial bengal waterdropwort herb in windter, planting lotus root in summer, putting natural crucians into the wet land, and harvesting the lotus root, the bengal waterdropwort herb and water products from the wet land each year. The construction cost and the running cost are low; the method is easy to operate; the nitrogen, the phosphorus and the COD (Chemical Oxygen Demand) in the waste in the pig farm can be greatly treated; and the method is extremely good in popularization and application prospect.

The invention discloses a sewage aerobic land treatment system. The system comprises a groove body formed by digging under the ground, wherein impermeable membranes are laid at the periphery and at the bottom of the groove body; and a sand layer, a water distribution layer, a packing and water collecting layer and a soil layer are formed in turn from bottom to top. The sewage aerobic land treatment system is characterized by also comprising a blast aeration system consisting of a blast blower, an air diffusion device and a connecting pipeline, wherein the air diffusion device is positioned below the water surface of the land treatment system and connected with the blast blower through a pipeline; pretreated sewage enters the land treatment system; and air is pressurized by the blast blower and diffused into sewage of the system in the form of small air bubbles through the air diffusion device. Therefore, the aims of charging oxygen into the sewage and stirring are fulfilled, good reoxygenation effect, high mass transfer efficiency, quick bio-membrane updating and high treatment efficiency are achieved, and the problem of blockage of the land treatment system in the operating process is solved effectively.

The invention discloses a method for under-forest plantation of bletilla striata. The method comprises forest land treatments of the steps that a tall tree forest land is selected as a planting plot for seedling exercising and acclimation, wherein after plantation of 100-120 days, tissue culture seedlings grow into seed balls with different sizes, so that bletilla striata seedlings are obtained; and under-forest transplantation is carried out, wherein cake fertilizers treated by composting are applied into the planting plot, wherein the 0.5-1.0cm high robust bletilla striata seedlings without disease or insect attack are selected for the transplantation; and field management and harvesting are carried out. The method disclosed by the invention has the advantages of simple operations, low cost, easy promotion and environmental protection. A good foundation is laid for under-forest medicine development; and good economic, ecological and social benefits can be obtained.

The invention discloses a rice straw composite vegetation substrate module used for desertification land treatment. The module sequentially comprises an upper non-woven cloth lining mesh layer, an upper straw fiber layer, a dry and compressed composite plant growth substrate layer, a lower straw fiber layer and a lower non-woven cloth lining mesh layer. The straw composite substrate can provide a relatively good water and fertilizer microhabitat for plant growth on desertification land, the plant survival rate is higher, growth speed is higher, the survival time is longer, and the vegetation ecological restoration efficiency is improved. The rice straw composite substrate module is used, substrate modules can be freely combined and spliced according to geological characteristics and demands in a tile adhering mode, and installation is very convenient. The straw substrate module is convenient to transport and store.

A cultivation method for interplanting clover and Polygonatum multiflora under forests, which belongs to the technical field of agroforestry compound management and cultivation, and is characterized in that it includes 1) selection of forest stand and forest land; 2) forest stand treatment; 3) forest land treatment; 4) multi-flower Polygonatum seed stem selection; 5) Shamrock seedling selection; 6) Polygonatum multiflora cultivation; 7) Sanyeqing cultivation; 8) Post-planting management; 9) Harvesting and other steps; , using precise planting techniques such as underground bagging planting, matrix soil mixed with broken tiles, standing vine topping, and quantitative control of vine length, etc. for clover, which not only meets the technical needs of industrial transformation and upgrading, but also saves the cost of forest facilities. It has also greatly improved the comprehensive utilization rate of forest land and the output value per unit area of ​​forest land, and the economic benefits are very significant.

The invention discloses a comprehensive saline-alkali land improvement system and a comprehensive saline-alkali land improvement and belongs to the technical field of land treatment. According to the system and the method, stems of alkali-resistant crops are utilized as silage so as to be eaten by domestic animals of a herding system, faeces generated by the domestic animals are thoroughly decomposed, then most of the faeces is returned to a saline-alkali land planting system, a small part of the faeces is conveyed to an aquaculture system, water in the aquaculture system is diverted to the saline-alkali land planting system so as to be used for irrigating a saline-alkali land, and lotus leaves in the aquaculture system as well as used culture medium and old crop leaves in a soil-less cultivation system are returned to the saline-alkali land planting system. The comprehensive saline-alkali land improvement system and the comprehensive saline-alkali land improvement method integrates ecological exploitation, livestock breeding, aquaculture, agriculture planting, agricultural technology popularization and sightseeing tour, have the advantages of short saline-alkali land improvement period, good effect and the like, and have wide application prospect and important practical significance.

The invention discloses a morchella cultivation method which includes the steps: base material culture; sterilization; inoculation; hyphae culture; land treatment; awning building; secondary plowing;field deed breeding; final-period management. By the aid of common raw materials, grain raw materials are avoided or decreased, grain resources are saved, cost is reduced, a lot of straws are consumed, waste is turned into wealth, air pollution caused by straw burning is avoided, parts of applied strains not consumed by morchella further can serve as organic fertilizers, soil is improved, and nutriment can be provided for crops of a next season.

The invention relates to a waste water treatment device which is a land treatment device applicable to slightly polluted river water treatment and treated water recycling, particularly to a bypass purification system for intensively treating slightly polluted river water. According to the bypass purification system, waste water sequentially flows through a nitrification section, a denitrification section and an adsorption dephosphorization section. The bottom of the denitrification section is filled with rotten wood as a controlled-release carbon source to solve the problem of insufficient denitrification carbon sources for the river water, so that the denitrification efficiency of the system to the slightly polluted river water is improved. The system is filled with packing with large specific surface areas, developed pores and good adsorption capacities, such as zeolite and cement bricks, so that the biological holding volume of the system is improved greatly, and high phosphate and nitrogen removing efficiencies are guaranteed. The bypass purification system has the advantages of being simple in structure, multiple in function, efficient, low in cost, easy to operate and manage, stable in operate, capable of achieving synchronous decarburization and dephosphorization and the like, treated water can be recycled directly, and the system can be combined with ecological construction and town afforestation functions.

The invention discloses a technology of in situ harmless treatment on waste drilling mud. A technical scheme is as below: based on a solid-liquid separation-solidification technology, land treatment is introduced to realize reutilization. First, solid-liquid separation is carried out; separated water is filtered by soil, and the filtered water can be used for producing cement mortar or concrete during well site standardization construction; filtered loess returns to a mud pool, uniformly stirred with slurry treated with solid-liquid separation and treated with solidification landfill. The invention has characteristics of low cost, good treatment effect and simple operation.

The invention provides a domestic sewage treatment system utilizing the solar energy and a treatment method of the same. The system comprises a solar system, an adjustment pool, a tower-type biofilter and a land treatment system. The method comprises the steps of utilizing the solar energy as a power for sewage circulation, sequentially treating the domestic sewage by the three phases of the adjustment pool, the tower-type biofilter and the land treatment system, and then draining water which reaches the standards. According to the system and the method provided by the invention, compared with the traditional biotreatment technology, microorganisms are fixed on carriers, thus preventing the loss of the microorganisms and reducing the dosage of the microorganisms; the microorganisms are high in activity, fast in reproduction, wide in adaptability and high in degradation capacity, thus increasing the biotreatment efficiency; meanwhile, the circulation of the sewage in the tower-type biofilter is carried out by utilizing the solar energy, thus reducing the running cost.

The invention relates to a method for treating a land with domestic sewage at a water-source forest land of a mountain area, which is formed by connecting two stages of land treatment units of a horizontal undercurrent wet land and a vertical undercurrent wet land in series, wherein the two stages of land treatment units are of the step shape in a buried form; a water distribution device for preposition hydrolysis-acidification pre-treatment is arranged at the front end of the horizontal undercurrent wet land; the yielding water of the vertical undercurrent wet land is directly spouted into an ecological reservoir. The method effectively removes COD, BOD, SS, heavy metal, ammonia, nitrogen and phosphorus in the sewage and can realize self oxygenation without power; the sewage can be well biodegraded, and the modified soil is taken as the main filler of the wet lands, thereby effectively avoiding that the traditional artificial wet land is easy to be blocked by the filler. The treatment method has the advantages of low construction cost and operating cost, easy management, good sewage treatment effect and strong impact-load resistance.

The invention relates to a method for improving saline-alkali soil to plant plants based on a prepared sludge nutrient substrate, and belongs to the technical field of sludge treatment and saline-alkali land treatment. The method comprises the steps that on the basis of the prepared sludge nutrient substrate, firstly, the sludge nutrient substrate is spread in the surface layer of the saline-alkali soil, and then ploughing, soil preparing and digging of parallel planting ditches are conducted; then the sludge nutrient substrate, a water retaining agent and crushed plant waste are mixed evenly, and sludge migrated soil is obtained; the sludge migrated soil is applied to the bottoms of the planting ditches to form the a migrated soil layer, plant seeds are sowed in the migrated soil layer, the upper side of the migrated soil layer is covered with non-woven fabric, and then regular irrigation and routine management are carried out. The method achieves the purposes of soil optimization and sludge treatment in saline-alkali land, soil optimization and sludge treatment are organically combined, environmental problems are solved by making full use of sludge wastes, and favorable conditions are provided for agro-forestry production.

The invention provides a domestic sewage treatment method, and belongs to the field of sewage treatment. The method comprises the steps of mesh filtration; precipitating adjustment, wherein a phosphorus removing agent is adopted; biochemical treatment, wherein sewage treatment is conducted through active sludge, an intermittent electrostatic field is set, and after the active sludge is pretreated by ultrasonic waves, tourmaline powder is added into the active sludge; precipitating adsorption, wherein porous adsorption filler is adopted as an adsorption material; wet land treatment. According to the method, the activity of microorganisms can be greatly activated, the adaptive capacity of the microorganisms to the electric field is improved, the sewage treatment time is shortened, reproduction of the microorganisms can be accelerated, the utilization rate of the active sludge is increased, and water body purification is promoted.

The invention belongs to the technical field of sewage treatment in environmental engineering, and particularly relates to a method for sewage treatment in a compound tower-type ecological filtering pool. The method disclosed by the invention comprises the following steps of: collecting the domestic sewage of residents by a sewage tube network, removing suspended substances in the sewage via thick and thin grids, and pre-treating the sewage; pumping the sewage in the compound tower-type ecological filtering pool formed by connecting a one-stage high-level water distribution anaerobic filtering pool and a multi-stage earthworm trickling filtering pool in series via a sewage pump; automatically flowing, collecting and distributing the sewage via the action of gravity; and achieving the purpose of purifying the sewage via the synergistic effect of microorganisms, filter material, animals (earthworms) and plants in the filtering pool. The method for sewage treatment in a compound tower-type ecological filtering pool disclosed by the invention combines with traditional sewage treatment process and land treatment method, has the advantages of being good in water yielding effect, simple in operation and management, small in floor area, low in construction cost and the like, and has good economic effects and environmental benefits.

The invention discloses a drained water recycling and nitrogen and phosphorus cascaded percolation, blocking and removal system for a paddy field on a southern gentle slope land and an application method of the system. The system comprises a paddy field irrigation and percolation system, a trench nitrogen and phosphorus blocking and removal system, a cascaded paddy field drained water reinjection and use system and a pond water storage ecological wet land treatment system. A farmland percolation system is arranged in the paddy field; paddy field ground drained water is gathered into water drainage farm trenches arranged along contour lines from a water outlet of a paddy gridding land; by the full use of the special topographic condition of the southern gentle slope land, all levels of paddy field pieces form cascaded distribution with a natural fall; during irrigation, water drained from the upper level of paddy field at high place enters the lower level of paddy field for reuse; in raining, rainwater which cannot be accumulated in the (upper level of) paddy field at the high place is directly gathered into percolation farm trenches for drainage; a pond is dug near to the tail end of the percolation trench of the last level of paddy field piece, and a pump station is built at the pond. The invention further discloses the application method of the system. The system is convenient to construct and small in engineering amount, and has good effects on blocking and removing nitrogen and phosphorus pollutants and efficient using of water-fertilizer cascade.

The invention relates to the technical field of water treatment, in particular to a house rainwater collecting and purifying system and method. The house rainwater collecting and purifying system collects and stores rainwater drained down from a roof through a first rainwater collecting device, the rainwater is purified through a dirt holding filter screen of a second rainwater collecting device and plant ecological filter treatment in a vertical flow wet land treatment pond, the content of pollutants in the rainwater is lowered, and the purified rainwater can be adopted as a reusable water source. The house rainwater collecting and purifying system is simple in structure, economical and applicable.

The invention relates to a cultivation method for organic konjac under a forest. The cultivation method comprises the following steps: 1) forest land selection; 2) forest land treatment; 3) seed selection; 4) sowing; 5) forest management; and 6) timely digging and harvesting. According to the invention, a proper cedar forest is selected for konjac planting, and by utilization of the characteristics of cedar trees, the occurrence of ground diseases and pests in the process of konjac planting is basically eradicated; meanwhile, needle leaves fallen from the cedar trees are utilized to improve soil, so the occurrence of underground diseases and pests in the process of konjac planting is basically eradicated; by adoption of planting under a cedar forest, no need of using any chemical pesticides for disinfection and almost no need of using chemical fertilizers are realized, and base fertilizer application and topdressing mainly adopt farmyard manure, so planted konjac is green and pollution-free and meets the standards of organic food; and by combination of links like scientific seed selection and sowing, unearthed konjac is uniform in sizes and shapes and has a yield increased by 15 to22% compared with the yield of the konjac obtained by pure planting or planting under a forest, and the phenomenon of diseased and dead plants in the process of planting is controlled to 2% or below.

The invention discloses a saline-alkali land treatment method. The method is a rapid treatment method with which investment is low, efficiency is high, desalination can be realized, and the saline-alkali land can be fertilized. According to the invention, a simple water-storage salt-removing facility is built; soil is desalinated with full utilization of the natural precipitation of rainy seasons; production and reproduction of aquatic algae such as spirogyra and moss are promoted, such that water surface coverage is formed; during a water shortage, the cover blocks soil moisture evaporation to prevent re-salinization, and the desalination effect of soil during the rainy seasons is maintained; with the death and decomposition of the algae, soil organic matters can be increased, soil structure can be improved, and soil fertility can be improved.

The invention provides a high-yielding cultivation method of millets. The method comprises the following six steps: land treatment, sprinkling irrigation device laying in a reserve land, seed treatment, seed sowing, and field management. According to the method, millets are cultivated in land blocks where previous crops are tuber crops, and nutrient in shallow and deep layers of soil is reasonably utilized; seeds are subjected to pre-transplanting treatment, and are subjected to seed dressing with carbendazim and metalaxyl with certain concentration; thinning and final singling are reasonably performed during production period, topdressing is timely performed, sprinkling irrigation is timely performed, line spacing is controlled to be small, even in regions where precipitation is low, high yield can be obtained, the benefit is improved, and the method is particularly suitable for promotion in arid regions and semi-arid regions, such as north China, northwest China and northeast China.