Wen Qinxue, Tutuka Candani, Keegan Alexandra, Jin Bo
School of Natural and Built Environments, University of South Australia, Adelaide, SA 5095, Australia.
J Environ Manage. 2009 Mar;90(3):1442-7. doi: 10.1016/j.jenvman.2008.09.002. Epub 2008 Nov 1.
This study was undertaken to investigate the removal of pathogenic microorganisms and their indicators in a laboratory scale biological treatment system that simulated the secondary treatment process of a wastewater treatment plant (WWTP). Four groups of microorganisms including bacteria, viruses, protozoa and helminths as well as the selected indicators were employed in the investigation. The results demonstrated that approximately 2-3 log10 removal of the microbial indicators was achieved in the treatment process. The log removal of Clostridium perfringens spores was low due to their irreversible adsorption to sludge flocs. The laboratory treatment system demonstrated a similar removal capability for Escherichia coli and the bacterial indicators (total coliforms, enterococci and particles <2.73 microm/L). The MS-2 bacteriophage, measured as a viral indicator, showed a lower removal than poliovirus, which may be considered as a worst case scenario for virus removal. The results of using particle profiling as an indicator for protozoa and helminths appeared to be inaccurate. The removal performance for bacterial and protozoan pathogens and their indicators in a full scale WWTP and the laboratory treatment system was compared.
本研究旨在调查在实验室规模的生物处理系统中病原微生物及其指标的去除情况，该系统模拟了污水处理厂（WWTP）的二级处理过程。研究中使用了包括细菌、病毒、原生动物和蠕虫在内的四组微生物以及选定的指标。结果表明，在处理过程中微生物指标实现了约2-3个对数10的去除。产气荚膜梭菌孢子的对数去除率较低，因为它们不可逆地吸附在污泥絮体上。实验室处理系统对大肠杆菌和细菌指标（总大肠菌群、肠球菌和粒径<2.73微米/L的颗粒）显示出相似的去除能力。作为病毒指标进行测量的MS-2噬菌体的去除率低于脊髓灰质炎病毒，这可能被视为病毒去除的最坏情况。将使用颗粒剖析作为原生动物和蠕虫指标的结果似乎不准确。比较了全规模污水处理厂和实验室处理系统中细菌和原生动物病原体及其指标的去除性能。
