Volcanic filter through beneficiation, crushing, screening, grinding process with a series of granular media, the main component of silicon, aluminum, manganese, iron and other dozens of minerals and trace elements, showed nearly circular particle , the color is red, black and brown, porous light weight, particle size can be produced according to different requirements. Volcanic biological filter performance in the microscopic structure of the chemical are: 1, microbial chemical stability: Volcanic biological filter anti-corrosion, inert, does not participate in biochemical reactions biofilm in the environment. 2, the surface electric resistance and the hydrophilic: Volcanic biological filter surface with a positive charge, is conducive to the growth of sessile microorganisms, hydrophilicity, and the amount of a biofilm attached to a multi-speed. 3, the impact of biofilm activity: as a biofilm carrier, volcanic biological filter for the fixed microorganisms harmless, no inhibitory effect, proved not affect microbial activity. Efficient light filter biofilm surface roughness showed a microporous microstructure in the physical structure, particularly suitable for these features on the surface of microbial growth, reproduction, the formation of biofilms. Volcanic filter in terms of not only BAF treatment of municipal sewage, and biodegradability of organic industrial waste, micro-polluted water, etc., can also be replaced by quartz sand to water treatment, activated carbon, anthracite as filter media, while also tail water may have been secondary treatment process sewage treatment plant after doing the depth of treatment, the treated effluent reuse water up to the standard can be used for water reuse. Gongyi City Water Treatment Material Co., Ltd. specializing in the production DingFeng polyacrylamide price, PAC, PAC price, PAC, polyacrylamide, PAM, professional manufacturers of water treatment chemicals to create professional quality, our website is : www.pamjg.com www.dfwtm.com www.bsclc.com