The natural exhaust system in screw type dryer often resulted in higher and fluctuated moisture content in dried scraps, therefore it was replaced by a mechanical exhaust system.

And while we continuously significantly pollute and exhaust our water, soil, and air resources, we still like to talk much about preserving, saving, and restoring natural riches.

The other raw material for photosynthesis, carbon dioxide, will be supplied as the exhaust from industrial plants such as power stations, oil refineries and natural-gas processors.