Composite fillers are widely used in printing and dyeing, silk and wool spinning, food, pharmaceutical, petrochemical, papermaking, etc. due to their advantages such as large specific surface area, high oxygen utilization rate, variable voids, non clogging, and wide applicability· In the treatment of wastewater containing cyanide, it is highly welcomed by users. The composite filler is supported by a plastic ring as the skeleton, loaded with vinylon silk, which is fastened to the plastic ring and evenly distributed in the sewage material. It is easy to form and replace films, and has good adaptability to concentrated sewage.

Keyword：Sewage disposal 丨 Drug