A2O Process Coupled with Membrane Filtration for Better Wastewater Treatment and Effluent Reuse Potential in Macau
Macau, a Special Administrative Region (SAR) of China, has a limited water resource due to its geographical setting and physical environment. Currently, a majority of water for Macau comes from Xijiang of the Pearl River in Guangdong. According to the environmental status reports published by the Macau Health Bureau in recent years, Macau water quality has continued to worsen and coastal waters with high eutrophic index are still recorded. There are four major wastewater treatment plants in Macau, mainly operated with the conventional activated sludge system and so called UNI-Tank system. More advanced technologies are required in order to simultaneously remove organics and nutrients and to provide a better effluent quality for reusing in future. In this research, a laboratory-scale anaerobic/anoxic/oxic (A2O) reactor was combined with a membrane filter to first better treat a regional wastewater using the reactor optimized, followed by membrane filtration of its effluent for the reuse potential, with or without UV disinfection. Results showed that the A2O process performed excellently in removing both organics and nutrients, with the removal efficiency for chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) at 97%, 80%, and 82%, respectively. After the subsequent treatment of its effluent by membrane filtration, the final effluent could meet all the quality goals for various regional reuse purposes. Further microbial studies are in progress, using plate counting and polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE), to elucidate characteristics and behaviors of microbial communities, including both heterotrophs and autotrophs, involved in this process.
anaerobic/anozic/ozic (A2O) membrane filtration nutrients removal organics removal wastewater reuse
SUN Jie PUN Laifung SHIM Hojae
Department of Civil and Environmental Engineering,Faculty of Science and Technology,University of Macau,Macau SAR,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1099-1103
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）