泸州某Phoredox+MBR工艺地下污水处理厂工程设计方案

泸州某在建酒业园区地下污水处理厂总规模为2×10⁴ m³/d，设计出水除TN浓度为10 mg/L外，其余主要出水水质指标均满足《地表水环境质量标准》（GB 3838—2002）中地表水Ⅲ类水标准，处理出水排入厂外小溪沟。污水厂采用全地下式建设型式，以减小占地，降噪防臭。地面打造景观公园，箱体内部组合处理构筑物形成处理单元，紧凑布局降低成本。采用Phoredox+MBR工艺作为核心生物处理工艺组合，保障可降解有机物、TN的有效去除；采用多级流动床活性焦吸附塔+砂滤池作为深度处理工艺组合，保障难生化有机物、色度等污染物的有效去除。结合地下箱体特点采用机械通风与自然通风相结合的通风系统，以及消火栓系统结合灭火器的消防系统，并针对断电和异常水质水量等情况设计应急处理方案。

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.