Abstract: The present invention discloses a filtering device used for removing impurities in a mixture of biological diatomite, which relates to the technical field of sewage treatment. This device includes a plurality of deflectors evenly distributed in multiple layers in the vertical direction. Each deflector includes a shell and a top plate. There is a filter unit symmetrically arranged on the left and right sides of each deflector. The top of the shell is covered with a top plate hinged with the depressed plate. The bottom of the shell is provided with water inlets which communicate with the shunt pipe, and the upper parts of the left and right side walls of the shell are provided with overflow ports. The shell also has a plurality of diversion folding plates located below the overflow ports and vertically staggered and distributed on the left and right side walls. The filter unit includes an inclined water guiding groove and a filtering plate.

Abstract: A system for high-value utilization of organic solid waste includes an anaerobic digestion unit, a biogas measurement and collection unit and a methane purification and liquefaction unit. The anaerobic digestion unit includes an organic solid waste pretreatment system and an anaerobic digestion device. The biogas measurement and collection unit includes a gas flow meter and a high-pressure biogas collection device. The methane purification and liquefaction unit includes a high-pressure separation tank, a liquefaction pretreatment system, a heavy hydrocarbon and benzene removal device, a two-stage rectification system, a low-temperature pressure liquid storage tank device and a buffer storage tank. The organic solid waste undergoes an anaerobic digestion treatment to produce methane followed by collection, purification and liquefaction.

Abstract: Provided is a method for evaluating a bioavailability of organic solid waste by an anaerobic conversion based on fractal dimension, relating to anaerobic digestion of organic solid waste. Organic solid waste is broken up and dried, and the organic solid waste is analyzed using a laser particle size analyzer, so as to measure a wave vector Q and a scattering intensity I. The wave vector Q and the scattering intensity I are analyzed using a data processing software, and a two-dimensional fractal dimension Df is obtained based on a fractal theory. A volatile fatty acid maximum VFAmax and a biochemical methane potential BMP of the organic solid waste are predicted according to the two-dimensional fractal dimension Df, so as to evaluate a bioavailability of organic solid waste by an anaerobic conversion.

Abstract: Provided is a method for evaluating a pretreatment effect for organic solid waste based on fractal dimension, relating to biological conversion of organic solid waste. Samples of the organic solid waste are collected, and dried and broken up to obtain dried samples. The mixtures obtained are analyzed using a laser particle size analyzer, so as to measure a wave vector Q and a scattering intensity I of each of the mixtures. According to a fractal theory, the wave vector Q and the scattering intensity I obtained are analyzed using a data processing software to obtain a two-dimensional fractal dimension Df of each of the samples. Based on data from documents and experiments, a total organic carbon or an apparent activated energy is evaluated, so as to evaluate the pretreatment effects of samples of the organic solid waste.

Abstract: The present invention discloses a filtering device used for removing impurities in a mixture of biological diatomite, which relates to the technical field of sewage treatment. This device includes a plurality of deflectors evenly distributed in multiple layers in the vertical direction. Each deflector includes a shell and a top plate. There is a filter unit symmetrically arranged on the left and right sides of each deflector. The top of the shell is covered with a top plate hinged with the depressed plate. The bottom of the shell is provided with water inlets which communicate with the shunt pipe, and the upper parts of the left and right side walls of the shell are provided with overflow ports. The shell also has a plurality of diversion folding plates located below the overflow ports and vertically staggered and distributed on the left and right side walls. The filter unit includes an inclined water guiding groove and a filtering plate.

Abstract: A system for high-value utilization of organic solid waste includes an anaerobic digestion unit, a biogas measurement and collection unit and a methane purification and liquefaction unit. The anaerobic digestion unit includes an organic solid waste pretreatment system and an anaerobic digestion device. The biogas measurement and collection unit includes a gas flow meter and a high-pressure biogas collection device. The methane purification and liquefaction unit includes a high-pressure separation tank, a liquefaction pretreatment system, a heavy hydrocarbon and benzene removal device, a two-stage rectification system, a low-temperature pressure liquid storage tank device and a buffer storage tank. The organic solid waste undergoes an anaerobic digestion treatment to produce methane followed by collection, purification and liquefaction.

Abstract: Provided is a method for evaluating a pretreatment effect for organic solid waste based on fractal dimension, relating to biological conversion of organic solid waste. Samples of the organic solid waste are collected, and dried and broken up to obtain dried samples. The mixtures obtained are analyzed using a laser particle size analyzer, so as to measure a wave vector Q and a scattering intensity I of each of the mixtures. According to a fractal theory, the wave vector Q and the scattering intensity I obtained are analyzed using a data processing software to obtain a two-dimensional fractal dimension Df of each of the samples. Based on data from documents and experiments, a total organic carbon or an apparent activated energy is evaluated, so as to evaluate the pretreatment effects of samples of the organic solid waste.

Abstract: Provided is a method for evaluating a bioavailability of organic solid waste by an anaerobic conversion based on fractal dimension, relating to anaerobic digestion of organic solid waste. Organic solid waste is broken up and dried, and the organic solid waste is analyzed using a laser particle size analyzer, so as to measure a wave vector Q and a scattering intensity I. The wave vector Q and the scattering intensity I are analyzed using a data processing software, and a two-dimensional fractal dimension Df is obtained based on a fractal theory. A volatile fatty acid maximum VFAmax and a biochemical methane potential BMP of the organic solid waste are predicted according to the two-dimensional fractal dimension Df, so as to evaluate a bioavailability of organic solid waste by an anaerobic conversion.

Abstract: A method for enhancing biochemical water treatment by a powder carrier includes: (i) screening the powder carrier by removing impurities to obtain a screened powder carrier; (ii) dissolving the screened powder carrier by stirring to prepare a slurry, enabling the screened powder carrier to completely absorb moisture to obtain a soaked powder carrier slurry; (iii) adjusting the pH value and adding the soaked powder carrier slurry into a bioreactor or a biological reaction structure; (iv) distributing the soaked powder carrier slurry uniformly through a hydraulic agitation; (v) loading a microorganism on the inner pore and wrapping on the surface of the soaked powder carrier slurry to obtain powder-loaded biological floccules; (vi) settling the powder-loaded biological floccules in a sedimentation zone and separating the powder carrier from the microorganism for reuse.

Abstract: A recovery system of composite powder carrier in HPB municipal wastewater treatment includes a biochemical tank and a concentration tank. The composite powder carrier is added to the biochemical tank for biochemically treating on the wastewater. The mixed liquid is then made to flow into the concentration tank. The supernatant obtained after filtration is then discharged. The concentrated sludge is returned to the biochemical tank, and the excess concentrated sludge is transported to a separator. The separator separates the substances with large specific gravity from those having smaller specific gravity, and the substances with large specific gravity are recycled to the biochemical tank for reuse. Matter having smaller specific gravity is discharged. The separator can be used to separate the composite powder carriers for recycling, which improves the utilization rate of the composite powder carriers and reduces the operation cost of the HPB technology for wastewater treatment.

Abstract: The present invention relates to microbial carriers for wastewater treatment, and in particular, relates to an organic composite powder carrier and its application for strengthening biological denitrification in municipal wastewater treatment. The organic composite powder carrier is compounded by a microbial carrier with a relatively large equivalent particle size and an organic alternative carbon source in the form of ultrafine powder. The composite powder carrier in the present invention includes a dedicated organic alternative carbon source, such as polyhydroxyalkanoates (PHA). The organic alternative carbon source can exclude the competitive relationship between microorganisms to ensure that denitrifying bacteria exclusively obtain electron donors required for denitrification.

Abstract: The present invention provides a method and system for preparing fuel gas by utilizing an organic waste with high water content. The method comprises the following steps: 1) providing an organic waste with high water content; 2) performing hydrothermal reaction by using the organic waste with high water content as a reactant to obtain a hydrothermal reaction product; 3) enabling the hydrothermal reaction product to generate steam, and separating a solid product and an oily liquid product in the hydrothermal reaction product; 4) performing gasification reaction by using the solid product, the oily liquid product and the steam as reactants to obtain a gasification reaction product; and 5) purifying the gasification reaction product to obtain clean fuel gas. The present invention further provides a system for preparing fuel gas. The method can be used for preparing clean fuel gas from the organic waste with water content of 60% or more.

Abstract: The present invention provides a method and system for preparing fuel gas by utilizing an organic waste with high water content. The method comprises the following steps: 1) providing an organic waste with high water content; 2) performing hydrothermal reaction by using the organic waste with high water content as a reactant to obtain a hydrothermal reaction product; 3) enabling the hydrothermal reaction product to generate steam, and separating a solid product and an oily liquid product in the hydrothermal reaction product; 4) performing gasification reaction by using the solid product, the oily liquid product and the steam as reactants to obtain a gasification reaction product; and 5) purifying the gasification reaction product to obtain clean fuel gas. The present invention further provides a system for preparing fuel gas. The method can be used for preparing clean fuel gas from the organic waste with water content of 60% or more.