Department of Applied Ecology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 5, 10-957 Olsztyn, Poland.
Eur J Protistol. 2011 Nov;47(4):287-94. doi: 10.1016/j.ejop.2011.06.001. Epub 2011 Jul 29.
This study aimed to determine the relationship between activated sludge microfauna, the sludge biotic index (SBI) and the effluent quality of a full-scale municipal wastewater treatment plant (WWTP) working with shock organic and ammonium loadings caused by periodic wastewater delivery from septic tanks. Irrespective of high/low effluent quality in terms of COD, BOD5, ammonium and suspended solids, high SBI values (8-10), which correspond to the first quality class of sludge, were observed. High SBI values were connected with abundant taxonomic composition and the domination of crawling ciliates with shelled amoebae and attached ciliates. High SBI values, even at a low effluent quality, limit the usefulness of the index for monitoring the status of an activated sludge system and the effluent quality in municipal WWTP-treated wastewater from septic tanks. It was shown that a more sensitive indicator of effluent quality was a change in the abundance of attached ciliates with a narrow peristome (Vorticella infusionum and Opercularia coarctata), small flagellates and crawling ciliates (Acineria uncinata) feeding on flagellates.
本研究旨在确定活性污泥微型动物、污泥生物指数（SBI）与全规模城市污水处理厂（WWTP）出水质量之间的关系，该污水处理厂受到来自化粪池的周期性污水输送导致的有机和铵负荷冲击。无论 COD、BOD5、铵和悬浮物的出水质量高低如何，均观察到高 SBI 值（8-10），这对应于污泥的第一质量等级。高 SBI 值与丰富的分类组成以及带壳变形虫和附着纤毛虫的爬行纤毛虫的主导地位有关。即使在出水质量较低的情况下，高 SBI 值也限制了该指数用于监测活性污泥系统状况和化粪池处理的城市 WWTP 出水中的出水质量的有用性。结果表明，附着纤毛虫（钟形聚缩虫和狭口旋口虫）、小口纤毛类（Oxytricha fallax）和以纤毛虫为食的爬行纤毛虫（Acinetobacter uncinatus）丰度的变化是更敏感的出水质量指标。
