42results about How to "Environmental impact factors are small" patented technology

The invention provides a fluorine-containing wastewater treatment method, which comprises the following steps of: detecting pH value of the fluorine-containing wastewater; adjusting the adding amount of alkali or acid solution according to the pH value detection result to control the pH value of the fluorine-containing wastewater; detecting fluorine ion concentration of the fluorine-containing wastewater, and determining the adding amount of a calcium salt according to the result; delivering the fluorine-containing wastewater to a first reaction tank and a second reaction tank in turn, stirring the wastewater and performing full mixing reaction; delivering the treated wastewater to a third reaction tank, stirring the wastewater, adding coagulant into the wastewater to generate flocculation reaction to realize solid-liquid separation, and separating calcium fluoride from the wastewater; delivering the treated wastewater to a fourth reaction tank, stirring the wastewater, and adding coagulant aid to improve the settling effect; and finally, delivering the treated wastewater into a settling tank, discharging clear solution, and filter-pressing silt into mud cakes. The fluorine-containing wastewater treatment method provided by the invention has ideal treatment effect, meanwhile saves the consumption of chemicals, and reduces the treatment cost.

The invention belongs to the field of antibody engineering and particularly relates to a method for preparing genetic engineering IgG antibodies in escherichia coli. The method comprises the following steps of: by phage display panning and genetic engineering technologies, respectively constructing prokaryotic expression vectors of heavy chains and light chains of antibodies, then converting the constructed prokaryotic expression vectors into escherichia coli, and inducing the expression of genetic engineering IgG antibodies by IPTG (isopropyl-beta-d-thiogalactoside). The method has the advantages that the generated genetic engineering IgG antibodies can be applied to the immunoassay kits, so that immunoassay for residues such as food, agricultural product additives and pesticide / antibiotics and the like, pathogenic microorganisms and related medical fields is realized, and a foundation is laid for commercialized development and production of high-quality immunoassaykit.

The invention provides a carbon quantum dot fluorescent microsphere standard substance, which is composed of aminated polystyrene microspheres and fluorescent substances loaded on the surface of the aminated polystyrene microspheres, and the fluorescent substance is carboxylated carbon quantum dots. The present invention also provides a method for preparing the carbon quantum dot fluorescent microsphere standard substance, comprising the steps of: (1) preparation of polystyrene microspheres; (2) preparation of nitrolated polystyrene microspheres; ( 3) Preparation of aminated polystyrene microspheres; (4) Preparation of carboxylated graphene quantum dots; (5) Preparation of standard substances of carbon quantum dot fluorescent microspheres. The carbon quantum dot fluorescent microsphere standard substance prepared by the present invention has the characteristics of not easy to fall off the fluorescence, short reaction time, long fluorescence activity, etc.; the particle size is uniform, strictly monodisperse, and has excellent stability; the method of the present invention is simple and can be operated at room temperature. The environmental impact factors are small and the cost is low, which is of great significance for the study of fluorescent standard substances.

The invention discloses a dry granular glaze for soft polished bricks and an application thereof. The dry granule glaze for soft tiles includes mixed dry granules composed of low-temperature dry granules, medium-temperature dry granules and high-temperature dry granules, wherein low-temperature dry granules account for 15% to 35%, medium-temperature dry granules account for 40-70%, and high-temperature dry granules account for 15% to 35%. Accounted for 15% to 35%.

The invention relates to a medium of producing pleuromutilin by fermenting Pleurotus sp and its fermentation method. The medium comprises a primary seed medium, a secondary seed medium and a fermentation medium, and is characterized in that the primary seed medium and the secondary seed medium contains cold pressing yellow bean cake powder and an organosilicon antifoaming agent; the fermentation seed medium contains cold pressing yellow bean cake powder, the organosilicon antifoaming agent and corn oil. According to the invention, corn oil and cold pressing bean cake powder can replace soya-bean oil and heat pressing bean cake powder, a medium formula can be optimized, the technical defects of low fermentation unit, less quantity of single pot mycelium and the like. The invention provides a fermentation unit, the thalline fermentation quality can be improved, the original accessory source can be maximally reduced without environmental influence, the sufficient supply can be guaranteed, and the production with stabilization and high efficiency of pleuromutilin can be realized.

The invention provides a frost-weathering construction method of channel lining concrete. The frost-weathering construction method comprises the following steps of: leveling a concrete surface; vibrating the concrete by using a plate vibrator until grout is formed on the surface; removing excess water in the concrete by using a vacuum hydro-exhaustion machine; stopping the vacuum hydro-exhaustion machine; revibrating the concrete by using the plate vibrator; revibrating the concrete to extract the grout before the initial condensation of the concrete; manually plastering to finish the surface; covering a moisturizing film on the surface; heating and maintaining the concrete surface by adopting a mobile infrared ray heating beam; and watering to moisturize and maintain the concrete surface so as to complete the frost-weathering construction of the channel lining concrete of the channel. The frost-weathering construction method is applicable to the channel lining concrete with large area and thin thickness; and when the frost-weathering construction method is adopted, both frost thawing resistance and frost heaving resistance of the channel lining concrete can be improved, the time of peeling the frosted surface of the concrete can be prolonged, and compactness and strength of the concrete can also be increased; and moreover the frost-weathering construction method has the advantages of simplicity in operation as well as low difficulty and quickness in construction, can be used for greatly accelerating the construction progress, and is slightly affected by environmental factors as a construction process in a special season.