Tan Guangcai, Xu Nan, Liu Yong, Hao Hongshan, Sun Weiling
a Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy , Peking University Shenzhen Graduate School , Shenzhen , People's Republic of China.
b College of Environmental Sciences and Engineering, Peking University , The Key Laboratory of Water and Sediment Sciences, Ministry of Education , Beijing , People's Republic of China.
Environ Technol. 2016 Nov;37(22):2905-15. doi: 10.1080/09593330.2016.1168870. Epub 2016 Apr 24.
The present study investigated the effects of lead on the morphological structure, physical and chemical properties, wastewater treatment performance and microbial community structure of aerobic granular sludge (AGS) in sequencing batch reactors (SBRs). The results showed that at Pb(2+) concentration of 1 mg/L, the mixed liquid suspended solids decreased, the settling velocity increased and the sludge volume index increased sharply. Meanwhile, AGS began to disintegrate and show an irregular shape. In terms of wastewater treatment in an SBR, the phosphorus removal rate was affected only until the Pb(2+) concentration was up to 1 mg/L. The [Formula: see text] removal efficiency began to decline when the Pb(2+) concentration increased to 6 mg/L, while the removal of chemical oxygen demand increased slightly within the Pb(2+) concentration range of 1-6 mg/L. Significant changes were observed in the microbial community structure, especially the dominant bacteria. Compared to the Pb(2+) accumulation on the sludge, the Pb(2+) concentration in the aqueous phase played a more important role in the performance and microbial community of AGS in SBRs.
本研究考察了铅对序批式反应器（SBR）中好氧颗粒污泥（AGS）的形态结构、物理化学性质、废水处理性能及微生物群落结构的影响。结果表明，当Pb(2+)浓度为1 mg/L时，混合液悬浮固体减少，沉降速度增加，污泥体积指数急剧上升。同时，AGS开始解体并呈现不规则形状。在SBR中进行废水处理时，仅当Pb(2+)浓度达到1 mg/L时，磷去除率才受到影响。当Pb(2+)浓度增加到6 mg/L时，[公式：见原文]去除效率开始下降，而在1 - 6 mg/L的Pb(2+)浓度范围内，化学需氧量的去除略有增加。微生物群落结构发生了显著变化，尤其是优势细菌。与污泥上的Pb(2+)积累相比，水相中Pb(2+)浓度对SBR中AGS的性能和微生物群落起更重要的作用。
