Plastic Polyhedral hollow ball is composed of two hemispheres which will form into a ball,and each hemisphere consists of a number of half fan-shaped leaves, the upper and lower leaves in a staggered arrangement. Each hemisphere’s fan-shaned leaves is like an air-liquid contacting area. However, when fan-shaped leaves stack each other, it is very easy to form partial occlusion so as to stop air movement. but never cause bridging & hole effect phenomenon. Therefore,  it can be used in sewage treatment, desulfurization of CO2 in power plant, desulfuration and purified water tower packing.