Method for treatment of black and odorous water by photocatalysis technology

Abstract

The invention relates to the technical field of sewage disposal, in particular to a method for treatment of black and odorous water by photocatalysis technology. The method is at least one of photocatalytic exogenous control treatment, photocatalytic endogenous treatment and photocatalytic water maintenance. The method adopts a photocatalytic material for in-situ treatment of black and odorous water, the photocatalytic material is photocatalytic powder and/or a carrier attached with the photocatalytic powder, the carrier is at least one of a net material, a porous foam substrate and fiber filler, and the photocatalytic powder is at least one of fractal structure titanium oxide, surface modified titanium oxide and activated carbon-reduced mesoporous titanium oxide. The method employs the photocatalytic material for effective decomposition of nitrogen and phosphorus organic matters in water, adsorption and redox of heavy metal ions in water, and supplementation of the dissolved oxygen content in water, finally realizes treatment of black and odorous water, saves the raw material cost and improves the treatment efficiency of black and odorous water.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for treating black and odorous water bodies by photocatalytic technology. Background technique [0002] In recent years, with the rapid development of my country's economy, the process of urbanization and industrialization has accelerated, and the discharge of urban sewage has continued to increase. However, urban water body protection infrastructure is still not perfect, and water pollution control and treatment measures are seriously lagging behind, resulting in a large amount of pollutants being discharged into rivers. In some urban water bodies, especially small and medium-sized urban water bodies, rivers have become the main discharge sites for industrial, agricultural, and domestic wastewater. Various indicators in the water body, including chemical oxygen demand (COD), nitrogen and phosphorus and other pollutants, greatly exceed the standard, causing eutr...

AI Technical Summary

Problems solved by technology

[0006] Second, endogenous sediment pollution

[0007] The third is the impact of insufficient hydrodynamic conditions and poor water circulation

Water bodies that have lost their ecological functions often have reduced or completely lost fluidity, which directly leads to a decline in the reoxygenation capacity of the water body. The problem of hypoxia in some water areas or water layers is serious, forming hydrodynamic conditions suitable for the rapid reproduction of blue-green algae, and increasing the risk of algal blooms. cause water quality deterioration

[0008] Fourth, the impact of water temperature rise and thermal pollution of water body

A typical application is to use graphene-titanium dioxide photocatalytic network for sewage treatment. This technology uses solar energy to treat sewage in situ. The project is small, the treatment cost is low, and it is green and safe. However, graphene is expensive and not conducive to business. Chemical application; at present, the price of graphene on the market is tens to hundreds of yuan per gram according to the purity requirements, and sewage treatment usually requires tons of raw materials, which is obviously not conducive to the application of graphene photocatalytic materials in water treatment

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