The three-dimensional elastic filler is made of polyolefins and polyamide. It is moderately rigid and flexible. The three-dimensional uniform arrangement of the silk strips is in a radiating state. It can be spread all over the specified area in a three-dimensional uniform manner, so that the gas water and biofilm can be fully mixed and exchanged. The biofilm can be uniformly attached to each silk strip, maintaining good activity and gap variability, and obtaining large specific surface area and good metabolism during operation. The elastic filler has the advantages of fast film hanging, easy film removal, good biofilm growth and renewal, high load impact resistance, high CODcr removal rate, good treatment effect and good oxygenation performance. It can conduct multi-level collision and intensive cutting on bubbles to increase the utilization rate of oxygen. The total transfer coefficient of oxygen, oxygenation capacity and oxygenation power efficiency, its five indexes of oxygenation performance are better than those of all kinds of fillers commonly used in China at present, which reduces power consumption, has novel structure, large specific surface area, no agglomeration, no blockage, long service life, can also be reused, and is simple for productive operation and management. It has strong adaptability and has good treatment effect on low concentration domestic sewage, medium concentration printing and dyeing wastewater, papermaking wastewater, oily wastewater, high concentration food industrial wastewater, chemical wastewater, etc. It can be widely used in aerobic, facultative and anaerobic treatment processes.
