30results about How to "Reduce nitrate nitrogen content" patented technology

The invention provides a secondary salinized soil remediation bacterial agent and application thereof, and belongs to the technical field of soil improvement. The bacterial agent is prepared from, byvolume, 0.5-1.5 parts of a bacillus licheniformis bacterial agent and 0.5-1.5 parts of a paenibacillus mucilaginosus bacterial agent; the living bacterium count of bacillus licheniformis in the bacillus licheniformis bacterial agent is 3-4 billion cfu/mL; the concentration of paenibacillus mucilaginosus in the paenibacillus mucilaginosus bacterial agent is 1.5-2.5 billion cfu/mL; the preservationnumber of the bacillus licheniformis is CGMCC No.10741; the preservation number of the paenibacillus mucilaginosus is CGMCC No.3995. The bacterial agent is utilized for remediating secondary salinizedsoil, the remediation effect is obvious, the content of nitrate nitrogen in the soil can be reduced, the soil fertility can be improved, and meanwhile, the yield and food safety of crops can be improved.

The invention belongs to the field of agricultural pollution prevention and control, and in particular relates to a greenhouse soil nitrate pollution modifying agent used for comprehensively modifying greenhouse soil nitrate pollution and effectively preventing and controlling underground water nitrate pollution risk in intensive vegetable planting regions, and a preparation method and a using method thereof. The greenhouse soil nitrate pollution modifying agent consists of composite liquid and effective microorganism (EM) bacteria liquid with equal mass ratio, wherein the composite liquid is prepared from sodium humate and dicyandiamide through composite proportioning; the EM bacteria liquid is bacterial liquid of fermented EM bacteria; and the composite liquid and the EM bacteria liquid are mixed according to the mass ratio of 1:1. The composite liquid and the EM bacteria liquid are combined to be irrigated and applied to soil, so that the greenhouse soil nitrate pollution can be prevented and controlled through biological and chemical control technological means, the nitric nitrogen content of the greenhouse soil can be reduced by above 10 percent, and the nitrogen utilization ratio of crops can be increased by above 15 percent.

The invention discloses a biochar filtration system for high-nitrogen wastewater treatment. The biochar filtration system comprises four layers of different biochar layers; the biochar layers are filled from top to bottom and are respectively a large-particle biochar layer, a biochar/sponge composite layer, a biochar/clay mineral composite layer and an activated biochar layer. The whole filtrationsystem is divided into three layers including an aerobic region, an anoxic-anaerobic region and an anaerobic region from top to bottom, nitrogenous pollutants in sewage are adsorbed by biochar on onehand and are utilized for nitration and denitrification on the other hand. The biochar filtration system is simple and practicable in process requirements and equipment investment, free of high-poweraeration equipment, free of professional environment-friendly equipment for system establishment, short in construction period and low in construction and operation costs.

The invention provides a landfill leachate treatment device. The device is formed by four treatment units such as a microbial electrolysis cell reactor, an anoxic denitrification reactor, a partial nitrification reactor and an anaerobic ammonia oxidation reactor which are sequentially in serial connection, wherein the microbial electrolysis cell reactor is provided with a water inlet end and a water outlet end for landfill leachate, the water outlet end of the microbial electrolysis cell reactor is connected with a water inlet end of the anoxic denitrification reactor, a water outlet end of the anoxic denitrification reactor is connected with a water inlet end of the partial nitrification reactor, a water outlet of the partial nitrification reactor is connected with a water inlet end of the anaerobic ammonia oxidation reactor, and a water outlet end of the anaerobic ammonia oxidation reactor is connected with a draining opening or a lower-level treatment unit. The treatment device canremove organic pollutions of the landfill leachate in high efficiency and denitrify in high efficiency, so that the treated landfill leachate can stably reach the standard. In addition, when the device disclosed by the invention is utilized to treat the landfill leachate, operation energy consumption and later sludge treatment cost are further saved.

The invention discloses a lake-beach land soil conditioner. The lake-beach land soil conditioner is characterized by being prepared from grass carbon powder, slag ash, attapulgite, natural zeolite, lime powder, bentonite, rotten livestock and poultry manure dried powder, rotten straw powder, urea, diammonium phosphate, potassium sulfate and shell powder; when the soil conditioner is used in lake-beach land, soil of the lake-beach land is loosened, the content of nitrate nitrogen in the soil of the lake-beach land is decreased, the content of organic matter and nutrient elements in the soil is increased, and growth of crops of wheat and the like is promoted; the conditioner is a soil regulating nutritional agent capable of improving the soil planting environment of the lake-beach land, nutrient elements and nutrition coordination substances which are needed by plants are added, and the effects of improving the soil, improving the fertilizer efficiency and protecting the environment are achieved; the lake-beach land soil conditioner has the advantages that the raw material resources are rich, the preparation technology is simple, field application is convenient, the production cost is low, and toxic and side effects do not exist.

The invention relates to a method for treating high-solid-content organic wastewater by anaerobic-aerobic deep coupling. The method comprises the following steps: crushing and screening organic wastes, adding a slurry liquid obtained by filtration into an anaerobic reaction unit, and carrying out anaerobic fermentation to obtain biogas and biogas slurry; introducing anaerobic outlet water into a solid-liquid separation unit for solid-liquid separation, and enabling separated biogas residues to return into the anaerobic reaction unit through a sludge backflow pump; enabling separated biogas slurry to enter an aerobic reaction unit, and removing nitrogen through a synchronous nitrification and denitrification process; and enabling part of outlet water of the aerobic reaction unit to flow back to the anaerobic reaction unit and undergo full dilution and mixing with organic waste raw slurry liquid for an anaerobic reaction, and enabling the other part of the outlet water to enter a next treatment process or be discharged after reaching the standard. According to the method, the anaerobic outlet water enters the solid-liquid separation unit, suspended solids are separated out, outlet water enters the aerobic reaction unit, the DO value in the water body of the aerobic reaction unit is well controlled, denitrification is completed, then a backflow ratio of aerobic outlet water is controlled and part of the aerobic outlet water returns to the anaerobic reaction unit again, the reaction is circulated, the anaerobic biogas production rate is increased, and meanwhile the water quality of the aerobic outlet water is higher.

The invention discloses a phosphate-solubilizing bacterial fertilizer which comprises phosphate-solubilizing bacteria and an organic matrix. By adding the phosphate-solubilizing bacteria into an organic fertilizer, soil phosphorus release can be promoted, the soil quality can be improved, the soil fertility can be improved, and the plant growth can be promoted. By applying the phosphate-solubilizing bacterial fertilizer, the contents of crude ash, crude protein, crude fat and cane sugar in the moso bamboo shoots in spring can be better increased, and the nutritional ingredients and taste of the moso bamboo shoots in spring are improved.

The invention belongs to the technical field of fertilizer, relates to chelating fertilizer, and in particular to the chelating fertilizer special for potatoes, which is applied to the field of potato planting, solves the problems of poor stress resistance caused by lack of trace elements, and low commercial potato rate, high nitric nitrogen content in tubers, poor taste and soil property deterioration which are caused by a low fertilizer utilization rate, and is capable of enhancing the stress resistance, increasing the fertilizer utilization rate, increasing the yield and the commodity rate of the potatoes, increasing the taste of the tubers, achieving high efficiency and environment friendliness, realizing production and income increment of growers and further realizing sustainable development of agriculture. The chelating fertilizer is prepared from the following raw material components in parts by weight: 10 to 20 parts of sorbitol, 8 to 30 parts of high-purity water, 1 to 5 parts of calcium acetate and 30 to 60 parts of calcium nitrate. The chelating fertilizer disclosed by the invention has the advantages of good application effect, good application environment, high fertilizer utilization rate, high yield, good quality, good economic benefit and wide market prospect.

The invention relates to a high-yield and high-efficiency fertilization management technology with a low non-point source pollution risk for chive. According to the technology, indexes such as plant height and single plant weight of chive plants after organic fertilizer and chemical fertilizer are applied can be accurately controlled through control for various factors such as nitrogen input total amount, organic and inorganic different-source nitrogen input structures, fine topdressing and the like, and meanwhile, the net production of harvest is obviously higher than the net production of harvest of pure application of chemical fertilizer and matched application of common chemical fertilizer and organic fertilizer. Besides, after chive planting is carried out by adopting the nitrogen nutrient structure control technology, the content of nitrate nitrogen in soil of a soil subsurface layer (20-40 cm) and the total nitrogen concentration in runoff water due to leaching loss are obviously reduced, and therefore, it is indicated that the fertilization technology can effectively reduce the risk of nitrogen non-point source pollution, is also beneficial to weakening the degree of soil acidification and salinization, reduces the content of nitrate nitrogen in the soil, improves soil fertility, increases the content of available phosphorus and rapidly available potassium in the soil and can also increase the content of organic matter in the soil.

The invention relates to a preparation method of a microbial prepration for purifying a water body, which comprises the steps of separating purifying strains from the water body, screening two strainsfrom the obtained strains and respectively inoculating the two strains into a broth liquid culture medium for culture for 10-24h under the conditions for preparing bacterial suspension with the bacterial concentration of about 10<8>.ml<-1>, and mixing the two types of bacterial suspension for obtaining the microbial prepration with the bacterial concentration of about 10<8>.ml<-1>. The product ischaracterized by good flocculation and bleaching effect, rapid speed, high removal rate of COD, soluble phosphorus, ammonia nitrogen and nitrate nitrogen in water and the like; furthermore, the prepration cost is low, the use is convenient, and the preparation method can be widely applied in bioremediation of rivers, reservoirs, ponds, lakes and other waste water.