5results about How to "Adjust pH" patented technology

This utility model discloses an environmentally friendly wastewater filtration device, relating to the field of wastewater treatment technology. It includes a fixed base plate and a treatment assembly. The fixed base plate is an integrated structure, with a supporting column installed on the left end of its upper surface. The treatment assembly is located on top of the supporting column and includes a sludge sedimentation tank, a supporting top plate, a servo motor, a connecting shaft, a stirring rod, a connecting frame, a scraper, a sludge discharge pipe, and a sludge pump. The sludge sedimentation tank is located on top of the supporting column, with the upper surface of the supporting column tightly connected to the lower surface of the sludge sedimentation tank. The supporting top plate is installed on the upper inner side of the sludge sedimentation tank, and a servo motor is installed on the upper surface of the supporting top plate. This environmentally friendly wastewater filtration device, through the treatment assembly, facilitates sludge pretreatment, preventing sludge from clogging the filtration mechanism. The filtration assembly enables the device to fully filter wastewater and facilitates cleaning of the filtration mechanism.

The present application belongs to the field of fertilizer preparation, and particularly relates to an active silicon-calcium-potassium-magnesium fertilizer, and preparation and application thereof. The active silicon-calcium-potassium-magnesium fertilizer contains biomass ash 60%, mineral humic acid 30% and binder 10% by weight. The active silicon-calcium-potassium-magnesium fertilizer is used as base fertilizer or topdressing. When used as base fertilizer, the application amount is 200 kg, and when used as topdressing, the application amount is 50 kg. The present application uses biomass ash of a biomass thermal power plant as the main raw material, adds appropriate amount of mineral humic acid, uses clay as binder, and uses granulation process to prepare granules, and then uses film spraying technology to inoculate functional bacterial agent. On the one hand, the present application solves the resource recycling of a large amount of biomass ash of a biomass power plant, and on the other hand, the present application improves the activity of silicon, calcium, potassium and magnesium in the product, and meets the needs of crops for silicon, calcium, potassium and magnesium.

The application discloses a kind of complex phase alumina fibers and preparation method thereof, belong to ceramic fiber technical field, the preparation method is composed of the following steps: spinning, drying, heat treatment;The spinning, alumina spinning sol is carried out dry spinning, and alumina gel fiber is obtained;The crystal phase of the complex phase alumina fiber is one of the composite crystal phase of mullite and gamma-alumina or the composite crystal phase of mullite and alpha-alumina;The preparation method of the application improves ceramic yield, solves the problem of high mullite phase transition temperature of gel fiber, and the complex phase alumina fiber prepared has good mechanical properties and temperature resistance.

This invention discloses a method for preparing phenolic chemicals by hydrogenolysis of lignin catalyzed by a cobalt-based nitrogen-carbon composite material. Using organosoluble lignin as raw material, a cobalt-based nitrogen-carbon composite material as catalyst, and a mixed solvent of small organic molecule alcohol and formic acid, the reaction is carried out under an inert gas atmosphere of 0.5–3 MPa, maintaining a reaction temperature of 210–250 °C, and a reaction time of 2–6 h. This method catalyzes the depolymerization of lignin to obtain a series of p-hydroxyphenyl products, achieving high-value utilization of lignin. The lignin conversion rate of this invention is as high as 89.6%, the total yield of monophenolic products can reach 17.7%, of which the yield of p-hydroxyphenyl products reaches 9.0%, with a selectivity of 50.8%. The catalyst preparation process used in this invention is simple and can catalyze the hydrogenolysis of lignin by short-chain alcohols and carboxylic acid solvents under mild conditions to obtain high-value-added chemicals such as p-hydroxyphenyl products.

The present application relates to the field of freeze-dried preparations of leeches, and provides a freeze-dried powder containing multiple active enzymes and a preparation method thereof, to solve the problem that the prior art cannot simultaneously ensure the release of active ingredients and the maintenance of the stability of active ingredients, comprising the following steps: S100, cooling leeches to obtain freeze-dried leeches; S200, putting the freeze-dried leeches into a solution system, crushing, centrifuging, and taking the supernatant; the pH value of the solution system is 6.5-8.5; the solution system at least comprises water; the crushing speed is 150-250 r / min, and the time is 5-8 min; S300, after the supernatant is separated and purified, freeze-drying is performed to obtain the freeze-dried powder of leeches. The present application adopts a freeze-crushing process, and after freezing, not only can the crushing operation be simply realized, but also the loss of active ingredients caused by high temperature can be reduced by utilizing the crushing process at low temperature of raw materials.