1. Lava stone Lava stone is formed when the lava stream flows and cools down with the air remains and becomes small holes in the final rock.

2. features Lava stone owe the special features such as sound absorbing and insulation,heat absorbing and preservation,water absorbing and slide –proof,acid &alkali proof ,“breathing function”

1) not radiation

2) not permeation

3) not poisonous and not odor

4) green and environmental-protection products with high quality

5) hyperfine and with high quality products

6) be used to interior decoration,outside decoration and paving publish square

7) natural stone

Application:

1)It is so called as functional stone which can be used safely in any place for its low radiation,wind erosion –proof and durability,sound absorbing and noise lowering,water absorbing and air humidity keeping,dizzy light avoiding,etc in improving our environment and feelings

2)Therefore,this volcanic stone material can be used widely in outer wall decoration,such as road ,square paving ,living distract gardening,etc to meet our needs of nature,primitiveness,simplicity,classicalism. 3)We can supply various kinds of finished volcanic stones with differently treated surfaces,such as honed ,polished,bush hammered ,etc.with all kinds of shapes and thickness. Volcanic 1The stability of microorganisms chemical characteristics:The volcanic biological filter is corrosion resisted, it is inertia, so it never reacts with biological films. 2Surfaces electric property and hydrophilcity: Volcanic filters surface brings positive charge, so it is favorable for the growth of the microorganisms. Its hydrophilcity is very strong, so the attached biological film quantity is large and very fast.

3The effectives to the biological film activity: as a biological film carrier, the volcanic biological filter is harmless , no suppressive to the fixed microorganisms, the fact proves that it never affects the microorganisms activity.

hydraulics characteristics