Li Dong, Craik Stephen A, Smith Daniel W, Belosevic Miodrag
AECOM, #300, 340 Midpark Way SE, Calgary, Alberta T2X 1P1, Canada.
Water Res. 2009 Feb;43(2):481-9. doi: 10.1016/j.watres.2008.10.025. Epub 2008 Nov 1.
Studies have shown that association between particles and coliform bacteria in wastewater influence the inactivation of these microorganisms by ultraviolet (UV) irradiation. This research investigated the potential use of indigenous aerobic spore-forming (ASF) bacteria for studying the particle - microorganism interaction and its effect on UV disinfection of protozoan pathogens, such as Giardia spp. and Cryptosporidium spp., present in effluents from full-scale municipal wastewater treatment plants. The effect of particle - ASF association was determined by homogenizing wastewater effluent samples before and after exposure to controlled UV doses delivered by a bench-scale collimated beam apparatus. Particle association between Bacillus subtilis spores added to wastewater and wastewater particles was also assessed. The results indicate that spores are not significantly associated with wastewater particulate matter and particle association does not significantly affect the inactivation of indigenous spores present in wastewater by UV radiation in this study.
研究表明，废水中颗粒与大肠菌群之间的关联会影响这些微生物通过紫外线（UV）照射的灭活效果。本研究调查了利用本地需氧芽孢形成（ASF）细菌来研究颗粒与微生物相互作用及其对原生动物病原体紫外线消毒效果的潜在用途，这些原生动物病原体如贾第虫属和隐孢子虫属，存在于大型城市污水处理厂的出水中。通过在台式准直光束装置提供的受控紫外线剂量照射前后对废水流出物样品进行均质化处理，来确定颗粒与ASF关联的影响。还评估了添加到废水中的枯草芽孢杆菌孢子与废水颗粒之间的颗粒关联。结果表明，在本研究中，孢子与废水颗粒物没有显著关联，并且颗粒关联不会显著影响废水中本地孢子通过紫外线辐射的灭活效果。
