Biohaydite filter material and its prepn

Abstract

The present invention is biohaydite filter material and its preparation process and belongs to the field of water treating engineering technology. The biohaydite filter material is prepared with shale 30-40 wt%, fly ash 30-45 wt%, sludge 10-20 wt%, pore creating agent 3-8 wt% and adhesive 0.5-2 wt%. The preparation process includes the steps of mixing material, forming, stoving, roasting, sintering and modifying. The preparation process has great amount of industrial waste utilized and low power consumption, may have microbes immobilized on its surface for biodegradation to result in raised organic matter degrading capacity, and may have its surface modified chemically for positively charging and hydroxylating favorable to eliminate natural organic matter from raw water.

Description

Technical field

[0001] The invention belongs to the field of water treatment engineering, and relates to a carrier for drinking water filtration technology, biological pretreatment of raw water, and advanced treatment of sewage. Background technique

[0002] At present, most commonly used particle carriers in biological treatment are activated carbon, zeolite and ceramsite. The problems of these biological carriers are: (1) Activated carbon: Although it has a huge specific surface area and strong adsorption capacity, activated carbon has low strength, short life span, unsuitable for washing, and high processing costs. (2) Zeolite: Due to the large pore size, the specific surface area is small and the adsorption capacity is poor. (3) The currently commonly used ceramsite also has many defects: low porosity, especially low content of micropores, insufficient surface roughness, and poor hydrophilicity, resulting in too small specific surface area of ​​ceramsite and poor adsorption p...

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