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

The invention relates to a carbon-based fertilizer potentiating agent and application of the carbon-based fertilizer potentiating agent. The carbon-based fertilizer potentiating agent is characterized by comprising the raw materials in proportion by weight: 50-70 carbon powder, 5-15 humic acid, 2-5 inhibitors mixing urease inhibitor with nitrification inhibitor, 10-20 microelement fertilizer, and 5-10 acid bentonite or clay; biomass granule carbon is selected as a matrix carrier, the production process is simple, raw materials are easily obtained, and the cost is low. The biomass carbon has strong adsorbability, water retention property and light absorption warming property, and can be used as good ammonia stabilizer and soil conditioner except for the carrier. After being applied into soil, the potentiating agent can lead the fertilizer to slowly release, and can relieve the influence of drought and lacked water and low temperature on crop growth. The potentiating agent not only can improve the fertilizer utilization rate, but also is environment-friendly and safe, can effectively improve the utilization rate of nitrogenous fertilizer and phosphate fertilizer, reduce fertilizer loss, and simultaneously can lighten the water body pollution and greenhouse effect by nitrogenous fertilizer, reduce the content of nitrate nitrogen in agricultural products, and ensure the safety production of food.

The invention discloses a combined soil additive composed of biological carbon and a nitrification inhibitor and a preparation method of the combined soil additive, wherein the combined soil additive are subjected to combined application under certain conditions to achieve the purposes of: 1) promoting the increase of aboveground biomass and yield of wheat, wherein the pot experiment shows that the wheat yield subjected to the combined application is respectively 80%, 65% and 103% higher than the wheat yield subjected to the single application of biological carbon, the single application of nitrification inhibitor and the application of no additive in the control treatment; 2) promoting the absorption and utilization of wheat to nitrogen, improving the nitrogen fertilizer use efficiency, wherein the pot experiment shows that the nitrogen harvest index compared with the control treatment without applying the additive is increased by 22%; 3) reducing the TN concentration in a runoff liquid and a leakage liquid as well as the TP concentration in the runoff liquid, so as to reduce the loss of nitrogen and phosphorus, avoid environmental pollution to the greatest extent; the combined soil additive has good economic and social benefits, and provides a useful reference for guiding the agricultural production.

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 method for promoting the reduction of soil nitrate by an iron film at the root of rice. The iron film of the rice can strengthen the reduction of nitrate, and is coupled with the process of iron oxidation and reduction, thereby increasing N 2 The invention can enrich soil denitrifying microorganisms and iron redox microorganisms, and can enhance the nitrate reduction of crop microorganisms, and couple the redox of iron, thereby reducing the risk of nitrate leaching, and is a kind of original It is an environment-friendly method under bit conditions, and has strong practical operability.

The invention relates to the technical field of rural sewage treatment equipment, in particular to a kitchen sewage treatment device. The device includes a sewage collection well and a reaction pool arranged around the sewage collection well. The bottom of the sewage collection well and the side walls of the sewage collection well are all impermeable structures. The reaction pool is sequentially provided with fine sand layers, The geotextile and gravel layer, and the fine sand layer are planted with moisture-resistant herb plants. The bottom of the reaction tank and the side wall of the reaction tank are all impermeable structures; The side wall and the position of the fine sand layer are provided with a second permeable hole. The second permeable hole is higher than the first permeable hole, prolonging the residence time of the kitchen sewage in the reaction tank, and enhancing the fine sand and moisture-resistant herb root system against the sewage. The adsorption and absorption effect of pollutants can denitrify as much sewage as possible, reduce the nitrate nitrogen content of sewage, realize centralized and effective treatment of kitchen sewage, and reduce the pollution of kitchen sewage to the environment.

The invention discloses clear liquid type high-potassium liquid fertilizer and a special potassium solution thereof. The potassium solution is a mixed liquid containing potassium nitrate and / or potassium chloride, potassium citrate and citric acid and is obtained through a neutralization reaction after citric acid and potassium hydroxide are added to a basic potassium solution prepared from water, potassium nitrate and / or potassium chloride. The clear liquid type high-potassium liquid fertilizer comprises (A) or (B) in parts by volume, wherein (A) comprises a urea ammonium nitrate solution, an ammonium polyphosphate solution and the potassium solution; (B) comprises the urea ammonium nitrate solution, the ammonium polyphosphate solution, the potassium solution and water. The content of potassium oxide in the potassium solution is high, no precipitation or crystallization is formed, and the potassium solution is resistant to temperature difference change; the potassium solution is slightly acidic, has good compatibility with ammonium polyphosphate and urea ammonium nitrate, has smaller influence on pH value of the mixed liquid fertilizer and is easy to use by adding pesticides or other fertilizer synergists. The liquid fertilizer contains organic potassium and inorganic potassium, facilitates absorption of crops and improves the quality. A process is simple, does not require heating and is environment-friendly and low-carbon.

The invention provides a method for treating landfill leachate, which comprises: the landfill leachate to be treated enters a microbial electrolytic cell reactor for microbial electrochemical reaction; the effluent after the microbial electrochemical reaction enters an anoxic denitrification reactor for Anoxic denitrification reaction; the effluent after the anoxic denitrification reaction enters the short-range nitrification reactor for short-range nitrification reaction; the effluent after the short-range nitrification reaction enters the anaerobic ammonium oxidation reactor for anaerobic ammonium oxidation reaction; the garbage seepage The leachate is directly discharged after the above-mentioned steps have been reacted and processed successively. The method for treating landfill leachate provided by the invention can efficiently remove organic pollutants and denitrify the landfill leachate, so that the treated landfill leachate can reach the standard stably. In addition, using the process of the present invention to treat landfill leachate can also save energy consumption in operation and treatment cost of later sludge.