32results about How to "High in nitrogen and phosphorus" patented technology

The invention discloses a domestication method for microcoleus vaginatus and application thereof. The method comprises the following steps of: preparing a special culture medium, performing domestications such as salt tolerance domestication, nitrogen-phosphorus content reducing domestication, adaptability to water to be treated and the like on the screened algae seeds, introducing the algae seeds into a saline-alkali land after gradual amplification culture, propagating a great amount of microcoleus vaginatus by using photosynthesis, wherein the microcoleus vaginatus absorbs and fixes nitrogen and phosphorus elements in the atmosphere and the water source; and draining the microcoleus vaginatus culture water after propagation, and depositing the microcoleus vaginatus in the soil, wherein the microcoleus vaginatus contains a large amount of elements such as nitrogen, phosphorus and the like. After one-time treatment of the method, the nitrogen in the soil is increased by 19 to 22 percent, the phosphorus is increased by 13 to 15 percent, and the full salt quantity is reduced by 25 to 30 percent; and the method avoids nutrient element loss caused by a washing method, avoids hardening of the soil and secondary pollution of the water source and the environment due to the application of fertilizers, can gradually enhance the soil fertility by multiple times of treatment, can accelerate soil recovery, and finally fulfills the purpose of improving the ecological environment.

The invention discloses a method for domesticating cylindrospermum and application thereof. The method comprises the following steps of: preparing a specific culture medium; carrying out salinity tolerance domestication on the screened algaes; reducing the domestication of nitrogen and phosphorus contents; adapting to the domestication on the quality of water to be treated and the like; introducing the algaes into saline and alkaline land after gradual amplifying culture; reproducing the algaes in a large mount by using photosynthesis; absorbing and fixing nitrogen and phosphorus elements in the atmosphere and water sources; after reproduction, draining algaes breeding water; and depositing the algaes into soil, wherein the algaes contain a large amount of nitrogen, phosphor and other elements. After the algaes are primarily treated, the nitrogen in the soil is increased by 18-20 percent, the content of phosphor is increased by 11-13 percent and the content of all salts is reduced by 12-15 percent. The invention not only prevents nutrient elements by a washing method from being lost, but also prevents applied fertilizer from hardening soil and secondary pollution to the water source and the environment; and after multiple treatments, the soil fertility can be gradually enhanced, the soil restoration can be accelerated and the finally the aim of improving the ecological environment can be achieved.

The invention discloses a method for removing and recycling copper from magnesium ammonium phosphate sludge and belongs to the field of urban living wastewater and industrial wastewater treatment and recycling. The heavy metal content of obtained magnesium ammonium phosphate sludge exceeds the standard due to low-concentration heavy metal in wastewater. In order to directly apply magnesium ammonium phosphate sludge to a farmland as a fertilizer, the method comprises the following steps: adding concentrated ammonia water and ammonium salt into the magnesium ammonium phosphate sludge comprising copper, mixing in a vibration manner, carrying out vacuum filtration after fully reacting, drying filter residues in the shade so as to obtain purified magnesium ammonium phosphate, carrying out electrolysis on filtrate which is obtained after solid-liquid separation, recycling elementary copper, mixing electrolyte with the magnesium ammonium phosphate containing copper, and realizing recycling. The copper content of the magnesium ammonium phosphate sludge treated by the method meets Control Standards for Pollutants in Agricultural Sludge (GB4282-84). The technology is simple and easy to operate. The problem that the quality of the magnesium ammonium phosphate sludge is reduced due to the existence of the copper in the wastewater is solved. The copper also can be recycled in the elementary form after being separated. Ammonia leach liquor can be recycled, and chemical cost is saved.

The invention discloses a vegetable-fat-base-contained nitrogen and phosphorus synergistic fire retardant and a preparation method and application thereof. The preparation method comprises the following steps: through modifying a biomass, acquiring a series of the vegetable-fat-base-contained nitrogen and phosphorus synergistic fire retardants, and phenolic resin for synthesizing the vegetable-fat-base-contained nitrogen and phosphorus synergistic fire retardant, finally uniformly blending with other assistants of a curing agent, a foaming agent, a surfactant and the like, pouring into a mould, curing in a certain temperature, to obtain foam. The phenolic foam of the vegetable-fat-base-contained nitrogen and phosphorus synergistic fire retardant has more excellent flame resistance and mechanical property compared with current pure phenolic foam, and because the fire retardant uses tung oil from a biomass source as a raw material at the same time, the vegetable-fat-base-contained nitrogen and phosphorus synergistic fire retardant has the double effects of saving resources and protecting environment.

The invention aims to the problem of difficult treatment on orange peel residues and municipal sludge and low recycling utilization rate and discloses a method of producing biogas by recycling orange peel and dehydrated sludge through fermentation. In the method, the orange peel residue and the dehydrated sludge are employed as raw materials to perform anaerobic fermentation, wherein the fermentation pH is regulated through a quick lime supernatant. The method allows continuous fermentation and batch fermentation. In the method, the characters that the orange peel residue is high in organic substance content and the dehydrated sludge is high in nitrogen and phosphorus contents and is abundant in microorganism colonies are fully utilized, thereby not only effectively solves the problems of recycling the orange peel residue and the municipal sludge, but also increasing common fermentation efficiency of the orange peel residue and increasing the utilizability of biogas residue and biogas liquid as fertilizers after common fermentation of the orange peel residue. The method is excellent in economic and environmental benefit.

The invention relates to a cellulose-based nitrogen-phosphorus flame retardant and a preparation method thereof. The preparation method comprises the following steps: dissolving a cellulose derivative into a solvent under the stirring condition that the speed is 100-1000 revolutions per minute so as to form uniform phases, adding micromolecule amine compounds as an acid-binding agent, and introducing nitrogen, wherein the water content of the cellulose derivative is less than 1%; dropwise adding phosphorus oxychloride into the solution, and continuously stirring for 1-10 hours while the reaction temperature is maintained at 25-100 DEG C; washing until no chloride ion exists, adding amino compounds into water which serves as a solvent according to the solid-to-liquid ratio of (1 to 1)-(1 to 50), and continuously stirring for 1-10 hours while the reaction temperature is maintained at 25-100 DEG C; filtering and drying to obtain the cellulose-based nitrogen-phosphorus flame retardant, wherein the drying temperature is 40-100 DEG C. The cellulose-based nitrogen-phosphorus flame retardant and the preparation method of the cellulose-based nitrogen-phosphorus flame retardant are environmentally friendly, and the preparation method is easy, convenient and feasible.