And their specific gravity is near to water, and they can provide habitat to accrete and grow for microorganism in the Moving Bed Biofilm Reactor Process (MBBR).

• 其比表面积大、密度接近于水，具有良好的亲生物特性，可作为悬浮填料在移动床工艺中为微生物提供附着生长的载体。