Cassava stillage and its anaerobic fermentation liquid as external carbon sources in biological nutrient removal  

木薯酒糟及其厌氧发酵液作为外加碳源强化城市生活污水生物营养盐去除研究（英文）

作　　者：Fan BU Xiang HU Li XIE Qi ZHOU 

机构地区：[1]State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering,Tongji University

出　　处：《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》2015年第4期304-316,共13页浙江大学学报（英文版）B辑（生物医学与生物技术）

基　　金：supported by the National Water Pollution Control and Management of Major Special Science and Technology Foundation(No.2011ZX07303-001),China

摘　　要：The aim of this study was to investigate the effects of one kind of food industry effluent, cassava stillage and its anaerobic fermentation liquid, on biological nutrient removal （BNR） from municipal wastewater in anaerobic- anoxic-aerobic sequencing batch reactors （SBRs）. Experiments were carried out with cassava stillage supernatant and its anaerobic fermentation liquid, and one pure compound （sodium acetate） served as an external carbon source. Cyclic studies indicated that the cassava by-products not only affected the transformation of nitrogen, phosphorus, poly-13-hydroxyalkanoates （PHAs）, and glycogen in the BNR process, but also resulted in higher removal efficiencies for phosphorus and nitrogen compared with sodium acetate. Furthermore, assays for phosphorus accumulating or- ganisms （PAOs） and denitrifying phosphorus accumulating organisms （DPAOs） demonstrated that the proportion of DPAOs to PAOs reached 62.6% （Day 86） and 61.8% （Day 65） when using cassava stillage and its anaerobic fer- mentation liquid, respectively, as the external carbon source. In addition, the nitrate utilization rates （NURs） of the cassava by-products were in the range of 5.49-5.99 g N/（kg MLVSS.h） （MLVSS is mixed liquor volatile suspended solids） and 6.63-6.81 g N/（kg MLVSS.h）, respectively. The improvement in BNR performance and the reduction in the amount of cassava stillage to be treated in-situ make cassava stillage and its anaerobic fermentation liquid attractive alternatives to sodium acetate as external carbon sources for BNR processes.

关 键 词：Biological nutrient removal （BNR） DENITRIFICATION Enhanced biological phosphorus removal （EBPR） External carbon source 

分 类 号：X799.3[环境科学与工程—环境工程]