Operational monitoring and evaluation of a compact sanitary wastewater treatment plant: UASB reactor followed by submerged aerated filter

ABSTRACT Compact Wastewater Treatment Plants (CWTPs) are a great alternative to implementing decentralized sewage systems that can serve small communities. However, such systems are still poorly used and there is little experience regarding their operation. Based on such demand, this research aimed to evaluate the efficiency and to conduct an operational monitoring of a CWTP composed by an Upflow Anaerobic Sludge Blanket (UASB) reactor, followed by Submerged Aerated Filter (SAF), in the city of Uru, São Paulo, Brazil. During the research, the system proved to be a viable alternative for small communities, because it showed good efficiency, with average removal values of biochemical oxygen demand (BOD5) and chemical oxygen demand (COD) of 91 and 85%, respectively. The monitoring carried out during the research also contributed to general improvements in the system.

摘要 紧凑型污水处理厂（CWTPs，Compact Wastewater Treatment Plants）是服务小型社区的分散式污水处理系统的优质替代方案。然而，此类系统的应用仍未得到充分推广，且相关运维经验相对匮乏。基于上述现实需求，本研究针对巴西圣保罗州乌鲁市的一套组合式污水处理系统展开效能评估与运维监测工作，该系统由上流式厌氧污泥床（Upflow Anaerobic Sludge Blanket，UASB）反应器与淹没式曝气滤池（Submerged Aerated Filter，SAF）串联构成。研究期间，该系统被证实为适配小型社区的可行方案：其处理效能优异，五日生化需氧量（biochemical oxygen demand，BOD5）与化学需氧量（chemical oxygen demand，COD）的平均去除率分别达91%与85%。本研究实施的运维监测工作，亦推动了该系统的全方位优化。