4results about How to "Optimizing dosage" patented technology

This invention discloses a method for extracting extracellular polymers from benthic microalgae culture medium, as well as the products and applications thereof, comprising the following steps: adding formamide to the benthic microalgae culture medium, adding Na... + The extracellular polymeric substance (ECPL) is obtained by stirring, centrifuging, heating and concentrating, freeze-drying, dissolving in water, adding anhydrous ethanol, precipitating, dissolving again in water, dialyzing, and freeze-drying. This invention improves upon existing ethanol precipitation processes by employing an extraction process of "heating and concentrating benthic microalgae culture medium—freeze-drying to obtain a crude extract—redissolving the crude extract in water—precipitating with anhydrous ethanol—dissolving the precipitate—dialysis—freeze-drying to obtain extracellular polymeric substances." Compared to traditional extraction processes, this method allows for "controllable" ethanol dosage by dissolving a large amount of crude extract in a small amount of water to obtain a solution rich in extracellular polymeric substances. Furthermore, it significantly reduces the amount of anhydrous ethanol used when extracting large quantities of extracellular polymeric substances, greatly lowering experimental costs.

The invention provides a method for simulating diffusion of a regenerant represented by a dynamic coefficient in aged asphalt, and relates to the technical field of road material regeneration, the method comprises the following steps: measuring the dynamic viscosity of the regenerant at a plurality of preset temperatures, calculating the kinematic viscosity, and carrying out temperature-viscosity conversion on the kinematic viscosity to obtain the characteristic parameters of the regenerant; a temperature field changing along with time is constructed, the kinematic viscosity of the regenerant changing along with time is calculated according to the temperature field changing along with time and the characteristic parameters of the regenerant, and the dynamic viscosity of the regenerant changing along with time is calculated; calculating the time-varying diffusion coefficient of the regenerant in the aged asphalt; a three-dimensional space calculation domain is constructed, and initial concentration distribution and zero-flux boundary conditions of the regenerant are set in the three-dimensional space calculation domain; and substituting the time-varying diffusion coefficient of the regenerant in the aged asphalt into a three-dimensional expansion equation of a Fick second law, and solving by adopting a finite difference method to obtain the time-varying diffusion concentration distribution of the regenerant in the aged asphalt.

The invention discloses a method for synergistically preparing tea saponin and a microbial flocculant, which comprises the following steps: preparing tea saponin crude extract and oil-tea cake extract from oil-tea cake, preparing the extract into an oil-tea cake culture medium, inoculating a flocculation functional bacteria seed solution for culturing, and preparing a pure microbial flocculant product. Preparing the tea saponin into a solution, mixing the solution with a tea saponin crude extract after oil removal and a coagulant aid solution for flocculation, and standing to obtain liquid tea saponin; and carrying out primary concentration, extraction, decoloration and secondary concentration on the liquid tea saponin to obtain the solid tea saponin. According to the method for synergistically preparing the tea saponin and the microbial flocculant, the microbial flocculant and the tea saponin which are high in yield and purity can be prepared at the same time, circulating sharing of water and an organic solvent can be achieved, and resource utilization of the oil tea cakes is achieved. The method also has the advantages of simple process, convenience in operation, low cost, environmental friendliness and the like, and is high in use value and good in application prospect.

The present application relates to solid resource processing and disposal field, especially to a kind of kitchen waste processing method.The kitchen waste processing method includes the following steps: (1) kitchen waste is broken, and ferrous salt is added, stirred uniformly, and mixed material is obtained;(2) in the mixed material, batch addition of urea peroxide is carried out, and then the remaining sludge and anaerobic sludge are added to carry out anaerobic fermentation;Methane and treated kitchen waste are obtained.In the present application, ferrous salt is used to catalyze urea peroxide to pretreat kitchen waste.Compared with directly using kitchen waste and sludge to co-digestion, the present application can use urea peroxide to degrade allicin in kitchen waste into low-toxicity products, reduce the toxicity of allicin on anaerobic functional microorganisms, and improve the production of methane in the anaerobic process.By batch addition, the dosage and mode of reagent are optimized, which reduces the dosage of urea peroxide while increasing the degradation of allicin and enhancing the production of methane.