Porous dephosphorization filter material based on kieselguhr and silicon earth and preparation method thereof

Abstract

The invention relates to the technical field of sewage treatment, in particular to a porous dephosphorization filter material based on kieselguhr and silicon earth and a preparation method thereof. The porous dephosphorization filter material is prepared from the following ingredients in parts by weight: 20 to 30 percent of kieselguhr, 45 to 55 percent of silicon earth, 8 to 11 percent of cement,6 to 10 percent of lime, 2 to 4 percent of gypsum and 1.5 to 2 percent of aluminum powder. The invention also discloses the preparation method of the porous dephosphorization filter material. The method comprises the following steps of (A) crushing the kieselguhr and silicon earth; (B) uniformly mixing kieselguhr powder, silicon earth powder, cement, lime, gypsum and aluminum powder according to the mixture ratio; adding water; performing stirring; then pouring the materials into a mold; (C) after demolding, performing natural caring for 3 to 5 days in the normal temperature state; (D) after the caring, crushing the materials into particles with the diameter being 1 to 3cm to obtain the filter materials. The porous dephosphorization filter material provided by the invention has the advantages that the removal rate of phosphorus in tail water in sewage treatment plants and surface non-point sourcearea sewage can be greatly improved; the water quality stability of the outlet water can bemaintained.

Description

technical field [0001] The patent of the invention relates to the technical field of sewage treatment, in particular to a diatomite and silica-based porous phosphorus removal filter material and a preparation method thereof. Background technique [0002] The presence of phosphorus is one of the main causes of eutrophication in water bodies. Urban non-point source sewage and agricultural non-point source sewage are mostly in the "Surface Water Environmental Quality Standards" (GB3838-2002) Class V and Class V standards, and the highest requirement for the effluent of sewage treatment plants at this stage is "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) Class A standard. This type of water has a relatively low concentration of pollutants and is often referred to as low-pollution water. It still belongs to the category of sewage and has a relatively large impact on natural water bodies such as rivers and lakes. Carry out advanced treatment o...

AI Technical Summary

Problems solved by technology

Powdery materials such as kaolin, diatomite, and fly ash are easy to clog and drain, and the water flow is poor; materials such as zeolite, volcanic rock, slag, ceramsite, and activated carbon are easy to saturate and have limited adsorption capacity

Some new materials are also gradually applied to water treatment adsorption materials, such as graphene, etc., but these materials are expensive and difficult to be widely promoted

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