Cao Xiang-sheng, Long Teng-rui, Meng Xue-zheng, Lai Zhen-hong
Key Lab of Beijing for Water Quality Science and Water Environment Recovery Engineering, School of Civil Engineering, Beijing University of Technology, Beijing 100022, China.
Huan Jing Ke Xue. 2004 Jul;25(4):70-3.
By specific oxygen uptake rate, (SOUR) measurements of activated sludge with different metal ion concentration, the optimal stimulation concentrations of Mn2+, Mo6+ and Zn2+ were determined. Then within each metal ion stimulation concentration range, extracellular polymeric substances (EPS) were extracted from activated sludge and its components (protein, polysaccharide and nucleic acid) contents changes were investigated. The results showed that the optimal stimulation concentration of each metal ion is 1mg x L(-1). EPS components of activated sludge vary obviously with Mn2+ and Zn2+ concentration change but not with Mo6+. After storage at low temperature, EPS quantities in activated sludge are reduced with polysaccharide reduction is the most.
通过测定不同金属离子浓度的活性污泥的比氧摄取速率（SOUR），确定了Mn2 +、Mo6 +和Zn2 +的最佳刺激浓度。然后在每个金属离子刺激浓度范围内，从活性污泥中提取胞外聚合物（EPS），并研究其成分（蛋白质、多糖和核酸）含量的变化。结果表明，每种金属离子的最佳刺激浓度为1mg x L(-1)。活性污泥的EPS成分随Mn2 +和Zn2 +浓度变化而明显变化，但随Mo6 +浓度变化不明显。在低温储存后，活性污泥中的EPS量减少，其中多糖减少最为明显。
