1. Main advantages

a. Take high-quality PVC, no degrade after immerging in wastewater for long time, no toxic material separate out, so it is better than other material such as PE.

b. High activity of microbial. The microbial membrane is growing on the surface of the new-type biological filler, and the filler fluidization and aeration make the microbial on the logarithmic increasing period, so it has high efficiency in treatment.