Combination fillers are developed on the basis of soft fillers and semi-soft fillers, and it has the benefits of both. Its structure is to change the plastic disc buckle into a double-circle large plastic ring, and press the aldehyde fiber or polyester filament on the ring of the ring to make the fiber bundle evenly distributed; the inner ring is a snowflake-shaped plastic branch, which can hang the film. , and can effectively cut the bubbles, improve the transport rate and utilization of oxygen. The water vapor biofilm can be fully communicated, so that the organic matter in the water can be efficiently treated.

        It is used in sewage and wastewater treatment projects, and is matched with contact oxidation towers, oxidation tanks and other equipment. It is a biological carrier for biological contact oxidation and anaerobic fermentation to treat wastewater.