Most of the organic matter in the original sewage water is degraded and purified here. Aerobic bacteria take the filler as the carrier and use the organic matter in the sewage as food to decompose the organic matter in the sewage into inorganic salts, so as to achieve the purpose of purification. The survival of aerobic bacteria must have enough oxygen, that is, enough dissolved oxygen in sewage to achieve the purpose of biochemical treatment. The air in the aerobic tank is provided by the fan, and the new semi soft biological filler is used in the tank. The filler has large surface area ratio, long service life, easy to form film and corrosion resistance. The micro pore aerator is used at the bottom of the tank, so that the transfer rate of dissolved oxygen is high. At the same time, it has the advantages of light weight, no aging, no blocking and long service life. Two parts in the contact oxidation tank:
Filler: this process adopts new three-dimensional elastic filler and layer dense high-efficiency biochemical filler. The filler has the advantages of large specific surface area, long service life, easy film formation and corrosion resistance. At the same time, the filler has a certain stiffness, which can cut the bubbles in the sewage at multiple levels, so as to increase the dissolved oxygen efficiency. Moreover, it is not easy to agglomerate between the filler and the filler, so as to avoid the blockage of the oxidation tank.