Urban sewage treatment composite material as well as preparation method and application thereof

Abstract

The invention discloses an urban sewage treatment composite material as well as a preparation method and application thereof. The urban sewage treatment composite material is prepared from rice hull, diatomite, polyaluminum chloride and ferment bacteria according to certain weight percentages. The preparation method comprises the following steps: A, uniformly mixing the rice hull and ferment bacteria, and naturally stacking and fermenting for two weeks to obtain a mixed raw material, wherein the fermentation temperature is 65-70 DEG C; B, when in use, uniformly mixing according to a condition that the weight ratio of the mixed raw material to water to brown sugar is equal to 1:0.3:0.01, fermenting for 110-130 minutes for later use, and ensuring that the water temperature of treated sewage is less than 10 DEG C; and C, uniformly mixing the mixed raw material which is fermented for later use with diatomite and polyaluminum chloride according to weight percentages to obtain the composite material. The invention also relates to an application of the composite material in urban sewage treatment. By virtue of the synergistic effects of adsorption, flocculation and biological transformation, the problems that an existing urban sewage treatment system cannot be used for effectively removing some hardly-degradable organic matters and soluble pollutants such as phosphorus and nitrogen can be solved, and thus a condition that effluent can reach the first grade A standard which is superior to the national urban and town sewage discharge standard can be ensured.

Description

technical field [0001] The invention relates to the field of urban sewage treatment, in particular to a composite material for urban sewage treatment, a method for preparing the composite material for urban sewage treatment, and an application of the composite material for urban sewage treatment. Background technique [0002] At present, among the urban sewage treatment plants that have been built and operated in China, the most extensive treatment process is adopted. The first-level enhanced treatment usually adopts the physical and chemical enhanced treatment method, the front-end process of the AB method, the front-end process of the hydrolysis aerobic method, and the high-load activated sludge method. Technology; the secondary treatment process is based on the scale of the urban sewage treatment plant, choose activated sludge method, oxidation ditch method, SBR method, hydrolysis aerobic method, AB method and biological filter method; the secondary treatment process ch...

AI Technical Summary

Problems solved by technology

The purpose is to remove carbon source pollutants while enhancing the effect of nitrogen and phosphorus removal. However, in practical applications, due to the fluctuation of influent water quality and the influence of many factors such as operating costs, these processes still cannot effectively remove nitrogen, phosphorus, and Pathogenic microorganisms, heavy metals and organic pollutants, etc., especially for some refractory organic matter, phosphorus, nitrogen and other soluble pollutants