Adopting polyolefin and polyamide as material, evenly and intensive strips distribution will ensure that bio film is fully mixed infiltration contact exchange to sustain good activity and space variability. In the actual application, intensive strips can be carried out many collisions and cutting against bubble. It will largely increase the oxygen utilization rate. therefore, it widely used in aerobic and anaerobic treatment process. it is widely used in biological contact oxidation pool, hydrolysis acidification pool for packing.