State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Bioresour Technol. 2011 Jan;102(2):1406-14. doi: 10.1016/j.biortech.2010.09.047. Epub 2010 Sep 17.
A pilot-scale NiiMi system for river landscape water treatment has been steadily operated for more than one year. The aim of the study was to investigate the spatial distributions of biofilm properties and water flow pattern in NiiMi system. Results showed that spatial distributions regularities of volatile suspended solid (VSS), respiration intensity, protein, polysaccharide, viable cell number and dehydrogenase activity were consistent with the aqueous rate. In addition, the viable cell, protein and polysaccharide specific dehydrogenase decreased with depth. Moreover, the protein: polysaccharide ratio increased with depth. Fourier transform infrared (FT-IR) spectroscopy indicated that protein was one of the components of extracellular polymeric substance (EPS). Gel filtration chromatography (GFC) analysis indicated that EPS had a broader MW distribution than that in the effluent water. Trace studies indicated that the occurrence of a dead zone volume of 18.7%, the top left section was the dead zone of the NiiMi system.
已稳定运行了一年多的 Niimi 系统用于河景水处理的中试规模。本研究旨在调查 Niimi 系统中生物膜特性和水流模式的空间分布。结果表明，挥发性悬浮固体 (VSS)、呼吸强度、蛋白质、多糖、活菌数和脱氢酶活性的空间分布规律与水速一致。此外，活菌数、蛋白质和多糖的特异性脱氢酶随深度的增加而减少。而且，蛋白质:多糖的比例随深度的增加而增加。傅里叶变换红外（FT-IR）光谱表明，蛋白质是胞外聚合物（EPS）的成分之一。凝胶过滤色谱（GFC）分析表明，EPS 的 MW 分布比出水中的更宽。示踪研究表明，死区体积为 18.7%，顶部左半部分是 Niimi 系统的死区。
