Volcanic stone powder

Physical properties

Appearance shape: no pointed granular, small resistance to water flow, not easy to block, uniform water and air distribution, rough surface, fast film hanging speed, repeated washing microbial film is not easy to fall off.

Porosity: volcanic rocks are naturally honeycomb porous, which is the best growth environment for bacterial micelles.

Mechanical strength: the national quality inspection department for 5.08MPa, practice proved that it can withstand different strength of hydraulic shear action, service life is far longer than other filter materials.

Density: moderate density, easy suspension and no material running when backwashing, can save energy and reduce consumption.

Biochemical stability: volcanic rock biofiltration material is corrosion resistant, inert, and does not participate in the biochemical reaction of biofilm in the environment.

Surface electrical property and hydrophilicity: the surface of the volcanic rock biofilter material is positively charged, which is conducive to the growth of microorganisms. It has strong hydrophilicity, and the amount of attached biofilm is large and fast.

Influence on the activity of biofilm: as a carrier of biofilm, volcanic rock biofilm filter material is harmless and has no inhibitory effect on the fixed microorganisms, and it has been proved by practice that it does not affect the activity of microorganisms.