Design Scheme of Underground Wastewater Treatment Plant Using Phoredox + MBR in Luzhou

The total scale of underground wastewatertreatment plant in a liquor industry park under construction of Luzhou was 20 000 m³/d. The effluent TN was required as 10 mg/L, the other main indexes were required to meet the surface water class Ⅲ standard in the Environmental Quality Standards for Surface Water (GB 3838-2002). The effluent was discharged into the creek outside the plant. The wastewater plant adopted the underground construction mode,which reduced the land occupation, noise and odor. With a landscape park on the ground, the wastewater plant combined treatment structures inside the box forms treatment unit, compect layout reduced cost. Phoredox+MBR process was used as the core biological treatment process to ensure the effective removal of degradable organics and TN. Multistage flow bed activated coke adsorption tower+sand filter was used as the advanced treatment process to ensure the effective removal of difficult biochemical organics, chroma and other pollutants. Combined with the characteristics of underground tanks, the ventilation system combining mechanical ventilation and natural ventilation was adopted.Furthermore, the firefighting system combining fire hydrant system and fire extinguisher was adopted. The emergency treatment plan was designed according to the situation of power failure and abnormal water quality and quantity.