Zn2+对SBR单级好氧模式生物除磷性能的影响.pdfVIP

中国环境科学 2014,34(9) ：2266~2272 China Environmental Science Zn2+对 SBR 单级好氧模式生物除磷性能的影响 * 贾利涛,陈洪波,李小明 ,杨 麒,许德超,赵建伟, 向 沙,刘芳芳,李娟娟 (湖南大学环境科学与工程学院, 湖南 长沙 410082) 摘要： 以合成废水为研究对象, 以丙酸盐为单一外加碳源,通过比较进水中不同 Zn2+浓度(0,1,5,10,20mg/L)下单级好氧模式下序批式反应器 (SBR)的除磷效果,考察进水 Zn2+浓度对单级好氧 SBR 生物除磷性能的影响,并通过分析各反应器中典型周期内磷及微生物体内储能物质 的变化,探究 Zn2+对单级好氧 SBR 生物除磷性能的影响机理.当进水 Zn2+浓度为 0 和 1mg/L 时,除磷率分别高达 96.84%和 97.90%.当进水 Zn2+浓度为 5,10,20mg/L 时,系统除磷率分别为 89.32%,76.43%和 57.29%,说明较高浓度 Zn2+对单级好氧 SBR 生物除磷有抑制作用.结果表 明,较高浓度 Zn2+可抑制 COD 的降解,微生物体内聚羟基脂肪酸酯好氧合成及磷酸盐激酶活性,并促进 GAOs 的代谢,使聚磷合成和水解量 减少,从而降低系统的除磷性能. 关键词：序批式反应器；丙酸盐；Zn2+ ；单级好氧工艺；生物除磷 中图分类号：X701.3 文献标识码：A 文章编号：1000-6923(2014)09-2266-07 2+ Effect of Zn on biological phosphorus removal performance in single-stage oxic sequencing batch reactor. JIA * Li-tao, CHEN Hong-bo, LI Xiao-ming , YANG Qi, XU De-chao, ZHAO Jian-wei, XIANG Sha, LIU Fang-fang, LI Juan-juan (College of Environmental Science and Engineering, Hunan University, Changsha 410082, China). China Environmental Science, 2014,34(9)：2266~2272 Abstract ：Effect of Zn2+ (0, 1, 5, 10 and 20mg/L) on phosphorus removal in single-stage oxic sequencing batch reactor (SBR) was investigated, the cyclic variations of phosphorus and intracellular polymers were analyzed, and the influencing mechanism of Zn2+ on phosphorus removal induced by the single-stage oxic regime was explored. The experimental results showed that 96.54% and 97.48% of the influent phosphorus could be removed in the reactors fed with 0and 1mg/L 2+ Zn . However, the phosphorus removal efficiency decreased to 89.20%, 76.43%, 57.29% respectively in the reactors fed with 5, 10and 20mg/L Zn2+, suggesting that a high