Volcanic rocks and efficient biological filter was first used in biofilm abroad, China has imported volcanic biological filter as water carrier. Environmental Protection Material Co., Ltd. of Tianjin Arts technology development at home and abroad, with domestic and foreign colleagues experts in the country to find the raw materials for processing of volcanic media. The selection of treatment, bio-activation processes processing, the apparent irregular particles, color is dark brown. Porous light. Particle size can be produced according to different requirements. The use of the biological filter, biological treatment can be organic industrial wastewater, municipal sewage, domestic miscellaneous drainage, micro-polluted source water. Volcanic rock biological filter is to achieve BAF sewage treatment process the key material, the product compared with traditional bio-ceramic, not only has the light texture, good chemical stability, strength suitable, easy to hang film surface roughness advantages and developed porosity, the distribution is reasonable, very suitable for microbial inoculation, domestication, breeding growth. Wash-resistant, non-blocking, has good physical, chemical and hydraulic characteristics, can be adapted to different requirements of water purification. As the filter surface area, can accumulate high concentrations of microbial biomass, high concentrations of microorganisms to biological aerated filter volume load increases, the removal efficiency. Treatment efficiency per unit volume increased 5-7 times than conventional filter media to meet environmental emissions standards. This product has been "the Ministry of Construction Quality Supervision and Testing Center of Water Treatment filter media," testing, quality indicators and reliable performance. 

 Appearance: 

 Irregular particles, color is dark brown. Porous light. 

 Uses: 

 Biodegradability of organic processing industrial wastewater, municipal sewage, domestic miscellaneous drainage, micro-polluted source water. 

 Features: 

 Volcanic rock biological filter is to achieve BAF sewage treatment process the key material, the product compared with traditional bio-ceramic, not only has the light texture, good chemical stability, strength suitable, easy to hang film surface roughness advantages Moreover, developed gap distribution is reasonable, very suitable for microbial inoculation, domestication, breeding growth. Wash-resistant, non-blocking, has good physical, chemical and hydraulic characteristics, can be adapted to different requirements of water purification. 

 Hydraulic Characteristics: 

 1, the idle rate: table uniform porosity of about 40% of the water resistance, while compared with the same filter, filter required less, the same filter to reach the expected goal. 

 2, than the appearance of plot: plot than the appearance of large, opening high and noble, beneficial microbes to fight the growth of biofilm and to link more microbial biomass, microbial metabolism in favor of the required course and metabolism of oxygen and nutrients birth place of the mass transfer process of the waste. 

 3, the filter shape and the water flow pattern: As the filter is not sharp volcanic grains, and the pore size is larger majority than the ceramic, Yi Shi in the use of water flow when the resistance is small, cutting energy consumption.