43results about How to "Avoid ecological damage" patented technology

The invention discloses a special fertilizer for forest ornamental plants and belongs to the technical field of plant fertilizer. The special fertilizer comprises the following compositions: 15.0 to 29.8 percent of harmless selectomycin bacterial residue, 10.0 to 15.0 percent of urea, 8.4 to 8.5 percent of diammonium phosphate, 10.0 to 13.3 percent of a potassium compound, 20.0 to 22.0 percent of calcium superphosphate, 5.0 to 15.0 percent of nitro humic acid and 2.0 percent of rare earth chelated with amino acid; and the compositions are calculated according to weight percentage. The special fertilizer is suitable for the forest ornamental plants at homes, nurseries, gardens, mountain forests and the like. In the process of planting forest trees, the special fertilizer is used to well promote the growth of the forest trees, has good fertilizing effect and mild nature and is a green product. The special fertilizer overcomes the disadvantages the prior forest fertilizer is easy to form soil hardening and reduce soil productivity and the like after being used and has good development and application values.

The invention discloses a monitoring system for air quality. The monitoring system comprises a processor, a sulfur dioxide monitoring module, a carbon monoxide monitoring module, a nitrogen dioxide monitoring module, an airborne particle monitoring module, a receiving module, a display module and an early warning module, wherein the processor is in charge of setting threshold values of various air indexes, receiving information sent by other modules in the system and processing the information; and the sulfur dioxide monitoring module, the carbon monoxide monitoring module, the nitrogen dioxide monitoring module and the airborne particle monitoring module are in charge of monitoring information collection of air factors in an area, and the early warning module receives an instruction from the processor to perform early warning prompting. The monitoring system disclosed by the invention can provide data support for people to improve environment and air quality, prevent ecological damages and create clean and appropriate environments.

The invention relates to the application field of carbide slag, and in particular relates to a method for trapping carbon dioxide from smoke by renewable carbide slag. According to the invention, the method for trapping carbon dioxide from smoke by renewable carbide slag comprises the following steps: 1) calcining the carbide slag to obtain an absorbent with an effective constituent of calcium oxide; 2) adding the absorbent of step 1) to a carbonization reactor to absorb carbon dioxide from the smoke to obtain calcium carbonate and clean smoke; 3) calcining the calcium carbonate of step 2) to regenerate the absorbent; 4) eliminating the inactive constituents from the regenerated absorbent of step 3), adding new carbide slag, returning to step 2) for recycling, and repeating steps 2) to 4). The invention has the advantage of following the environment protection concept of treating wastes by wastes, so as to lower the discharge of carbon dioxide from the smoke, and has favorable application prospects.

The invention discloses a method for recovering calcium phosphate fertilizers from sludge incineration bottom ash. The method comprises the following steps: (1) drying sludge incineration bottom ash to a constant weight, and cooling for later use; (2) mixing a hydrochloric acid solution with the sludge incineration bottom ash, stirring for 5-60 minutes, and filtering to obtain a phosphorus-rich extract; (3) adding calcium hydroxide into the phosphorus-rich extract, reacting for 1-60 minutes, and evaporating and concentrating the reaction solution at 100-120 DEG C to form a crystal film on thesurface of the solution; and (4) naturally cooling and crystallizing at the room temperature, filtering, collecting upper crystals, and air-drying the crystals to obtain the phosphate fertilizer. According to the method, extraction is carried out in a low liquid-solid ratio manner; the generation of a large amount of waste liquid is avoided, due to the low liquid-solid ratio, an enriching effect is realized during the phosphate extraction process, the cost of subsequent treatment is reduced, meanwhile, hydrochloric acid is adopted for processing, no new substance is generated, the extraction is not hindered, the extraction rate is high, and the purity of the obtained phosphate fertilizer is high.

The present invention provides a system and a method for processing and reusing graywater. At least two vertical flow wetland units are provided, each of which comprising a container filled with at least one granular substrate and at least one species of a hygrophilous plant, and an outlet. At least one of the wetland units is set to an inactive state during a predetermined period of time such that influx of graywater to each of the inactive units is prevented, whereby to regenerate each inactive wetland units. At least one of the wetland units is set to an active state to allow introduced graywater to be purified. Purified graywater is discharged from the outlet of each active unit to a sink. At least a portion of the purified graywater is recirculated to each active wetland units so that a portion of the purified graywater, when desired, is discharged to a domestic site for reuse.

The invention discloses a protective structure for preventing and controlling a riverway concave bank from being eroded. The protective structure comprises an overflow weir formed through double-layerinlaying, a protective arm and dam abutments formed by inlaying large dimension stones. The relatively higher protective arm is arranged on the concave bank side prone to erosion of a riverway, and the relatively low overflow weir is arranged at the center of the riverway, so that river water is centralized in the overflow weir and a protection-free convex bank to flow through a river bend, flowing of the river water close to the concave bank is retarded, the shear stress at the concave bank is reduced, silt at the concave bank is prevented from being eroded by the river water, meanwhile water level rise before the overflow weir is quick, a scour pit is formed behind the weir, pressure gradient is formed on a river bed due to water level difference, and surface water and underground waterexchange is promoted. Compared with a traditional method, the protective structure is low in cost and long in service life, can also prevent the concave bank from being eroded, promotes surface waterand underground water exchange, thus improves the self-cleaning capacity of the riverway, relieves riverway pollution and has a wide application prospect in the fields such as channel improvement ofriverway and mountainous area drainage basins.

According to the compound organic fertilizer and the preparation method thereof, the livestock and poultry manure, the straw powder and the caragana microphylla powder are selected as raw materials, the raw materials are decomposed into the fertilizer rich in micromolecular organic matter through the steps of steam explosion, compost fermentation and the like, nutrients are balanced, fertility is lasting, and growth and development of plants can be effectively promoted after the compound organic fertilizer is applied. Meanwhile, bentonite, rectorite powder, coco coir, humic acid, a water-retaining agent, chitosan and other raw materials are further added into the fertilizer, the composite organic fertilizer with the particle size of 3-5 mm is prepared through mixing granulation, agricultural waste resources are utilized, the application amount of the chemical fertilizer is reduced, ecological damage and environmental pollution caused by excessive application of the chemical fertilizer are avoided, and a good ecological cycle is formed; meanwhile, agricultural travel income increase can be achieved, and agricultural sustainable development is promoted.

The invention discloses a force intertransmission type interlocking block and a preparation method thereof. The interlocking block comprises an interlocking block body and triangular prisms, wherein the interlocking block body adopts a cuboid structure or a cube structure; the bottom surfaces of the triangular prisms are in the shape of a right triangle; the plane where a first right-angle side of one prism is located is attached to the side surface of the interlocking body, and the length of the first right-angle side is equal to the height of the interlocking body; the plane where the second right-angle side is located coincides to the plane where the top surface or the bottom surface is located; 2 triangular prisms are arranged on each side surface of the interlocking block body, and the plane where a second right-angle side of one triangular prism alternatively coincides to the top surface and the bottom surface. When the force intertransmission type interlocking block is paved on the ground, pressure of an object on a single force intertransmission type interlocking block can be dispersed to adjacent other force intertransmission type interlocking blocks. Meanwhile, the stressed area of the ground by the object is increased, so that the pressure on the ground is better dispersed, and the probability of damage to the force intertransmission type interlocking block or the ground is reduced.

The invention discloses a method for planting pineapples by using an organic formula fertilizer, and belongs to the technical field of agricultural planting. The organic formula fertilizer comprises the following raw material components by dry weight: 25-30 parts of astragalus sinicus straws, 10-20 parts of chicken manure, 10-15 parts of mushroom stick waste residues, 15-20 parts of waste plant herbal residues, 12-16 parts of soybean meal, 3-6 parts of a complex microbial inoculant, 15-20 parts of humic acid, 4-8 parts of compound amino acid and 4-8 parts of a water-retaining agent. The organic formula fertilizer is prepared according to the steps of raw material treatment, material composting fermentation, adding of residual raw materials, uniform mixing and fertilizer granulation. The organic formula fertilizer is balanced in nutrient, strong in soil fertility and strong in water retention capacity, meets the growth and development requirements of the pineapples, can effectively promote the growth of the pineapples and improve the yield and quality of the pineapples when being used for planting the pineapples, and can effectively prevent the pineapples from cracking and further improve the quality of the pineapples by using an anti-cracking regulator in the planting process.

The invention discloses a method for predicting rainfall in the grassland area of northern China based on TDNN. The method comprises steps: the input variables P (t-1), P (t-2), P (t-3) and output variables P (t) of the TDNN prediction model being determined; obtaining the training data and test data of TDNN prediction model; importing the training data into the TDNN prediction model, and trainingthe TDNN prediction model; the input variables of the test data being imported into the trained TDNN prediction model, the output results of the TDNN prediction model and the actual observed rainfallbeing compared, and the MAE and RMSE being calculated; comparing the training precision of MAE and RMSE of each TDNN prediction model; if MAE and RMSE are less than the expected precision, the training of TDNN prediction model being completed; otherwise, the model parameters being adjusted and retrained. The invention solves the technical problem that the prediction accuracy is not high due to the inability to accurately describe the time relationship between the inputs of the model in the conventional rainfall prediction model.

The invention discloses a BPNN-based method for predicting NDVI in grassland areas in northern China: establishing a BPNN prediction model for monthly average rainfall in future annual growing seasons; establishing a mapping model for monthly average rainfall-NDVI in future annual growing seasons; predicting rainfall using BPNN The monthly average forecasted value of rainfall in the future annual growing season produced by the model is substituted into the rainfall-NDVI mapping model to obtain the monthly average forecasted value of NDVI in the future annual growing season. The present invention can accurately predict the average value of NDVI in the growing season (June-August), thereby realizing the estimation of the livestock quantity (carrying capacity) that can be grazed in future years according to the predicted value of NDVI. grazing strategies to avoid overgrazing in disaster years.

The invention discloses an ecological artificial channel with filtering and electricity generation functions at a downstream position of a reservoir. The ecological artificial channel comprises two rows of river retaining walls respectively arranged in the artificial channel in the river flow direction, the two rows of river retaining walls are respectively arranged close to the two sides of the channel, an inner area between the two rows of the river retaining walls is an inner channel, and an area between one river retaining wall and the corresponding side of the channel is an outer channel; the lower portion of each river retaining wall is provided with water flow holes, the water holes are internally provided with rotary turbines used for electricity generation, and closing valves are arranged at the positions of the water flow holes; one surface, close to the corresponding outer channel, of each river retaining wall, is provided with lifting inserting boards, each lifting inserting board is provided with a filter casing used for filtering mud in water, the inner channel is internally provided with a dirt interception layer, the dirt interception layer is internally provided with water flow through holes, and the upper surface of the dirt interception layer is provided with dirt accumulation areas. Compared with the prior art, the timing reservoir sluicing is utilized by the ecological artificial channel with the filtering and electricity generation functions at the downstream position of the reservoir, so that when the double-layer-design artificial channel is filled with water, the hydroelectric generation is achieved through the utilization of the water level difference by the inner and outer channels; besides, rubbish and foreign matters in a river can be filtered, the water quality is purified, and energy conservation and environment protection are achieved.