The polypropylene packings offered by NCS as biological media in trickling filters offers specific design for the use in fixed film biological filters. The UV stabilized packings offers increased capacity and efficiency to aerobic treatment of waste water in the systems.

The Bio – Rings are cylindrical elements with large windows allowing passage of solids and outside ribbed to provide extra surface area and strength. Usually of 90mm diameter (3.5 inches) size are used in the filter applications.

These random packing in large tower will have the following technical data.