74results about How to "Reduce non-point source pollution" patented technology

The invention belongs to the technical field of treatment of city rainfall runoff, and in particular relates to a quality-graded collecting and purifying process and system for rainfall runoff. Firstly, the rainfall runoff on the ground surface flows into an intercepting pool through a rain well and a rain pipe, the early stage runoff stored in the intercepting pool is pumped into a sewage pipe network by a submersible sewage pump and flows to a sewage factory along with sewage; and the later stage runoff overflows and enters a percolating pool through an effluent weir, and is directly drained into the natural water body after being filtered and absorbed by a soil covering layer, a quartz sand layer, an anthracite layer and a pebble layer in the percolating pool. The seriously polluted early stage runoff and the lightly polluted later stage runoff can be effectively separated by the process and system, and the runoff flows to the respective treating units, and simultaneously, the later stage runoff is treated to achieve the water standard that treated later stage runoff can be discharged to the natural water body and water bloom of the water body is not easily induced, thereby finally reducing non-point source pollution caused by the runoff and protecting the water quality of the natural water body.

The invention discloses an ecological comprehensive treatment system of a northern mountain river channel. The system comprises three sub ecological systems of an ecological permeable dike built on the upstream of a main stream and a branch stream of a mountain river, a reservoir pond arranged at the middle and downstream area of the mountain river and a wet land communicated with the reservoir pond, and adopts an ecological treatment mode of closure-storage-preservation. The construction method comprises the steps of: a) building of the ecological permeable dike; b) setting of a triangular pyramidal wood pile stone cage; c) building of the reservoir pond; d) planting of plants of the reservoir pond; e) building of a wet land system; and f) recovery of a river bank band. The system and the construction method can effectively intercept the mountain debris flow and the river non-point source pollution, adjust the river runoff, improve the hydrologic conditions of the mountain river in non-flood season, decrease the dry season of the mountain river, and facilitate to recover the ecological system of the mountain river. Meanwhile, traditional depressions and empty ponds in the mountain river can be used in construction, so that the engineering building cost is reduced, and the self-cleaning capacity of river water is improved.

The invention provides a solanum tuberosum and double cropping rice rotation crop rotation culture method for improving a south double cropping rice paddy soil micro-aggregate structure, and belongs to the field of agricultural production. The method mainly comprises the first step of solanum tuberosum high-yield cultivation and the second step of early rice and late rice high-yield cultivation, wherein the first step comprises the substeps of preparation before seeding, variety selection, cutting of seed solanum tuberosum, seeding at suitable time and coverage of straw and a mulching film, field management comprising timely film breaking, topdressing, drainage and insect disease prevention, timely harvesting, and field returning of solanum tuberosum stem leaves and straw for coverage, and the second step comprises the substeps of variety selection, seedling transplanting, filed management comprising scientific fertilization, weeding, irrigation and insect disease prevention, timely harvesting and field returning of straw. By means of the method, south double cropping rice paddy winter agriculture can be reasonably developed, the rice paddy soil micro-aggregate structure is effectively improved, soil is fertilized, economic benefits of solanum tuberosum in one season are increased on the basis of ensuring the double cropping rice yield, the purposes of improving the rice paddy soil structure and obtaining high-yield year-round crops are achieved, and the popularization value is high.

The invention discloses a sand settling and deoiling device, which comprises a separation well, a bottom baffle is arranged inside the separation well, a separation area is above the bottom baffle, and a sand settling area is below the bottom baffle, and the separation area is provided with a separator, drainage Pipe and tangential water inlet pipe, the separator is located in the center of the separation zone, including inner and outer cylinders that are concentric and connected at the top, the bottom of the inner cylinder is connected with an inclined deflector, and the drain pipe communicates with the cavity between the inner cylinder and the outer cylinder And outside the separation well, the tangential water inlet pipe connects the external sewage and the cavity between the outer cylinder and the inner wall of the separation well, and the tangential water inlet pipe is tangent to the outer wall of the outer cylinder; the bottom baffle has the same cross-sectional size as the inner wall of the separation well, and is located in The position directly below the cylinder is provided with a grit chamber, and the grit chamber connects the separation area and the grit chamber. The invention can effectively reduce the silt content and oil concentration in the rainwater, and reduce the non-point source pollution discharged into urban water bodies.

The invention relates to a water level and water quality layering control weir of a drainage ditch of a rice field. Three types of five weir plates in different heights are designed according to the characteristics of each growth period of rice; the heights of the five weir plates are determined according to the buried depth of underground water required by the rice in different growth periods; by combining the five weir plates, outlet control weirs in different heights of the drainage ditches can be formed, and the drainage control requirements of rice reviving, early stage of tillering, late stage of tillering, booting stage, tasseling stage, milky ripeness stage, yellow ripening stage and late stage of fertilizing; two hand grabs are arranged on the lateral surface of each weir plate; an arc rubber waterstop band is arranged at the bottom of each weir plate which ensures overall seamless joint water stop among the weir plates; doorframe grooves are arranged on two sides of the drainage ditch; rubber waterstop bands are arranged on two sides in the doorframe grooves; the weir plates can be slidingly taken out or placed into the frame grooves and cannot leak water; two pull rod handles for taking and placing the weir plates are additionally arranged; and rhombus rings of the pull rod handles can be sleeved with hand grabs on the weir plates to place or take out the weir plates from the doorframe grooves on two sides of the drainage ditch. The invention has the advantages that the combined height of the weir plates cannot cause the flooding damage on the rice, can be used for retaining nitrogen, phosphor and other nutrients in the rice field and reducing the pollution of high-concentration nitrogen and phosphor in the drain to a water body. The invention saves the water consumption for irrigation, improves the utilization rate of underground water resources, has favorable waterstop effect among the weir plates and is convenient to manually operate.

The invention discloses a mixing synergist capable of improving the utilization rate of a rice fertilizer, and a use method of the mixing synergist, relating to the technical field of fertilizers used by rice planting. The mixing synergist is prepared by the following raw materials in parts by weight: 1-3 parts of a urease inhibitor, 1-2 parts of a long-acting compound fertilizer additive, 0.5-1.2 parts of a synergist, and 0.5-1 part of nano carbon. The mixing synergist has the characteristics of improving the utilization rate of the rice fertilizer and the grain yield, reducing the flow rate of nitrogen and phosphorus of a farmland to a water body and soil, and controlling the agricultural non-point source pollution generated by the farmland from the source and the like. The mixing synergist capable of improving the utilization rate of the rice fertilizer provided by the invention is a mixing synergist capable of improving the utilization rate of the rice fertilizer and reducing the nitrogen and phosphorus loss, and is suitable for being applied in early and late rice planting.

The invention relates to rainwater treatment and recovery, and provides rainfall runoff pollution treatment equipment with a self-cleaning function. A water storage skip bucket communicated with inlet water is arranged in a cell body; the both ends of the water storage skip bucket are movably connected with two opposite inner lateral faces of the cell body, and are fixedly connected with the cell body through a bolt; a sediment hopper is arranged on the cell bottom of the cell body; a submersible sewage pump is mounted in the sediment hopper; an overflow weir hopper is further arranged in the cell body; and the weir top of the overflow weir hopper is lower than the upper edge of the cell body. For the purpose of convenience for automatic control, the rainfall runoff pollution treatment equipment further comprises a PLC (Programmable Logic Controller) electric control cabinet; a floater liquid level switch is arranged in the sediment hopper; and the PLC electric control cabinet controls the on and off of the submersible sewage pump according to received signals transmitted by the floater liquid level switch and controls the opening and closing of the bolt simultaneously. According to the rainfall runoff pollution treatment equipment provided by the invention, initial-stage runoff with heavier pollution and later-stage runoff with lighter pollution can be effectively separated and flow to own treatment units. Finally, the area pollution caused by runoff is removed. Therefore, the water quality of the natural water body is protected, and the self-cleaning of the equipment is realized.

The invention belongs to the field of organic compound fertilizers and relates to a production method of a natural pumice loss-controlling organic compound fertilizer. The fertilizer in the prior art has serious loss, causes the environmental degradation and brings great harm to human beings. The production method has the following steps: taking raw material fertilizers of nitrogen, phosphorus and potassium, mixing with natural pumice powder which is smashed into 120 meshes and an organic fertilizer, uniformly stirring, preparing into mixed raw materials, then granulating, drying, screening, weighing and packaging. The weight of natural pumice in the fertilizer accounts for 10-30% of the total weight of the fertilizer; and the content of organic matters is 10-20%. The content of the nitrogen, the phosphorus and the potassium in the fertilizer is 20-40%. The production method has the advantages of simple production process and convenient use, and can control the nutrient loss, protect the ecological environment, reduce the fertilizer application cost, improve the utilization rate of the fertilizer, improve the physical and chemical properties of the soil and promote the stable and high yield of crops.

The invention relates to a corrosion-resistant and beneficiating non-point source pollution control method for a spring corn slope cropland. The method comprises the following steps of isometry mulch laminating and transplanting of narrow rows, soil anti-corrosion conditioner applying of wide rows and one-time reasonable fertilization. Advantages of single technologies such as isometry mulch laminating of a slope, applying of a soil anti-corrosion conditioner and slow release fertilizer applying are integrated to overcome disadvantages, so loss of water, soil and nutrient is reduced and soil quality is improved. Isometry mulch laminating of a cross slope is combined with a high molecular chemical-physical conditioner and the synergism slow release fertilizer, and labor and capital investments are reduced. Compared with the traditional method in which only pure ridge culture of cross slopes, straw mulching and excessive fertilizer applying are adopted, the corrosion-resistant and beneficiating non-point source pollution control method for the spring corn slope cropland has the advantages of improving the water content by 5-9%, reducing soil bulk weight by 0.05-0.1g/cm<3> and reducing surface runoff by about 15%.

The invention provides a U-shaped modular extensible multifunctional spraying and dripping irrigation system, and belongs to the field of irrigation of farmland water conservancy, garden economic crops and greenhouse crops. The system comprises a power machine pump, a suction inlet filter, a spraying irrigation fertilizer application device, a head drying pipe, a spraying irrigation control valve,a dripping irrigation control valve, a spraying irrigation branch pipe, a sprayer and auxiliary device, a dripping irrigation pressure reduction valve, a water power balance branch pipe, a dripping irrigation fertilizer application device, a dripping irrigation filter, a micro-dripping irrigation branch pipe, a micro-dripping irrigation module, a capillary tail pressure meter and a drainage ditch. According to the system, spraying irrigation and dripping irrigation can be simultaneously and independently implemented, the system has irrigation, fertilization and drainage functions, water powerdesign is reasonable, investment cost can be controlled, movable and fixed modes can be adjusted, irrigation areas are easily widened, and the system is high in adaptability and utilization rate.

The invention discloses a technology for controlling and eliminating weeds in an alfalfa field by film-side planting. According to the technology, the coverage of the weeds in the alfalfa field can be effectively controlled, and can be reduced by 21 to 46 percent; in addition, the annual yield of alfalfa hay is greatly increased by 19.8 to 152.6 percent; total yield per hectare in three years is increased by 9,387.6 to 9,438.4kg, and if per ton of alfalfa hay is 2,400, economic benefits per hectare can be increased by 22,530 to 22,652 yuan, and efficiency per hectare is equivalently improved by 1,502 to 1,510 yuan; moreover, the using amount of a weed killer is reduced, pollution to the environment is reduced, and the target of low-environmental consumption production of the alfalfa industry can be effectively promoted.

The invention discloses a system and a method for multi-media ecological treatment of rural domestic sewage in cold and arid regions. The system comprises a sewage regulating and deoiling unit (1), a multi-media soil layer system low temperature-resistant strengthening treatment unit (2), a subsurface-surface flow wetland gradient treatment unit (3), a water resource regulation and storage unit (4), a ferment recycling unit (5) and a wind-solar complementary micro-power and heat supply unit (6); the sewage regulating and deoiling unit is sequentially connected with the multi-media soil layer system low temperature-resistant strengthening treatment unit, the subsurface-surface flow wetland gradient treatment unit and the water resource regulation and storage unit; the wind-solar complementary micro-power and heat supply unit is respectively connected with the sewage regulating and deoiling unit and the multi-media soil layer system low temperature-resistant strengthening treatment unit; and the ferment recycling unit is respectively connected with the sewage regulating and deoiling unit, the multi-media soil layer system low temperature-resistant strengthening treatment unit and the subsurface-surface flow wetland gradient treatment unit.

The invention discloses a green manure returning and fertilizing method. The method comprises the following steps of S1, artificially and uniformly sowing common vetch seeds in a field at the end of July to the first ten-day period of August 10-15 days before highland barley is about to be harvested in a valley agricultural area with the altitude of 3800m or below in Tibet; S2, in the first ten days of October, cutting the whole plant of flourishing common vetch into small sections or performing crushing, performing uniform sowing, performing complete field returning, and then performing turning and pressing with the turning and pressing depth of not less than 20cm; S3, leveling land, and performing flood irrigation for 2-3 times to promote decomposition of green manure; S4, in April of the next year, performing intensive cultivation, preparing soil, planting spring highland barley, and strengthening field weed removal and water and fertilizer management; and S5, in the first ten days of August, after the previous crop of highland barley is harvested, fully using hydrothermal resources in the later growth period of the preceding crop, performing ploughing and soil preparation in time for common vetch multiple cropping, and repeating steps from S1 to S3. According to the green manure returning and fertilizing method, reduction of nitrogen fertilizer input is of great significance in slowing down agricultural non-point source pollution.

The invention discloses a method for reducing and controlling non-point source pollution of an oriental cherry nursery. The method realizes reduction and control of non-point source pollution of a nursery through annual interplanting of fresh-eaten broad beans and Vicia sativa L. in an oriental cherry nursery. Through use of broad bean sowing, broad bean planting, broad bean harvest, broad bean plant turning and pressing, Vicia sativa L. sowing, Vicia sativa L. turning and pressing and oriental cherry nursery management, based on nitrogen fixation properties of broad beans and Vicia sativa L., the nitrogen content in the soil is increased and the nitrogen application rate in the nursery is reduced. Through reuse of broad bean and Vicia sativa L. plants in fields, soil organic matter content is increased and physicochemical properties of soil are improved. Through rainfall interception, infiltration, retention and utilization performances of broad bean and Vicia sativa L. plants, the water and soil loss of a nursery is reduced. Compared with the conventional management method, the method reduces chemical nitrogen use amount by 40%, improves nursery incomes, increases soil organic matter content, effectively controls soil loss and nitrogen transferable nutrients and reduces non-point source pollution so that sustainable development of an oriental cherry nursery is realized.

The invention discloses a preparation method and a field using technology of a special all-element compound fertilizer for sugarcane. The preparation method and the field using technology comprise the following steps: (1), preparing a high-yield cultivation nutrient formula for the sugarcane; (2), preparing the special all-element compound fertilizer for the sugarcane; (3), applying the compound fertilizer in a field; and (4), topdressing. The preparation method and the field using technology of the special all-element compound fertilizer for sugarcane are strong in specificity and capable of achieving comprehensive benefits of increasing the yield, saving the fertilizer and saving the labor.

The bacteriostatic organic-inorganic composite fertilizer consists of botanical bacteriosatic matter 10-15 weight portions, chicken manure 35-4 5 weight portions, nitrogen fertilizer 5-15 weight portions, phosphate fertilizer 2-8 weight portions, potash fertilizer 4-10 weight portions and additive 1-10 weight portions. It is prepared into granular fertilizer through drying and crushing of the organic material, mixing and fermentation, air drying the fermented matter and compounding, and mechanical pelletizing. The present invention combines fertilizer with pesticide and germicide.

The invention discloses a method for producing aquatic vegetables and a green manure during crop rotation of water mimosa and paddy rice. With the method, paddy rice and water mimosa are planted according to a certain ratio during a double-cropping rice period. Water mimosa can grow together with paddy rice in a paddy environment. Rhizobium of the water mimosa on the part on the surface of the paddy can fix nitrogen, such that soil nitrogen content can be increased. After the harvesting of early-season rice, the edible parts of water mimosa are harvested, and all the non-edible parts are turned back to the field as green manure; after the harvesting of late-season rice, winter cropping of water mimosa is carried out; about 1 month before early-season rice planting in the next year, the edible parts of the winter-cropping water mimosa are harvested, and all the non-edible parts are turned back to the field as green manure. With the paddy rice and water mimosa crop rotation method, soil fertility can be maintained on a basis of increasing paddy rice yield. Also, the use of chemical fertilizer nitrogen can be reduced, such that non-point source pollution caused by paddy rice production can be retarded.