• 关键词：SBR  好氧颗粒污泥  胞外聚合物  PN  PS

• 基金项目：国家水体污染与治理科技重大专项(No.2009ZX07210-003)

• 刘绍根
• 安徽建筑大学环境与能源工程学院, 合肥 230022

• 孙菁
• 安徽建筑大学环境与能源工程学院, 合肥 230022

• 徐锐
• 安徽建筑大学环境与能源工程学院, 合肥 230022

• 摘要：为研究金属离子的投加对好氧污泥颗粒化进程的影响,在3个构造一致的序批式活性污泥反应器(SBR)中分别接种普通活性污泥、投加50 mg·L^-1 Ca²⁺的活性污泥和投加50 mg·L^-1 Mg²⁺的活性污泥来培养好氧颗粒污泥.结果表明:金属离子的投加能缩短好氧污泥颗粒化时间,改善颗粒污泥的性质,Ca²⁺更多地影响颗粒污泥的物理性质,Mg²⁺主要影响生化性质.Ca²⁺、Mg²⁺的投加可促进细胞分泌胞外聚合物(EPS),以及蛋白质(PN)和多糖(PS)的含量增加,且Mg²⁺较Ca²⁺对EPS中组分及组分比例影响更大.此外,Ca²⁺、Mg²⁺投加下培养的好氧颗粒污泥具有更强的除污性能.

• Abstract：The effect of metal ions on the formation of aerobic granular sludge was investigated using three SBR reactors. Two of the reactors were dosed with 50 mg·L^-1 Ca²⁺ and 50 mg·L^-1 Mg²⁺, respectively, while the other was run as a control. Results demonstrated that dosing metal ions could accelerate the formation of aerobic granules and improve their properties. Ca²⁺ mainly affected the physical properties of granular sludge, while Mg²⁺ primarily affected their biochemical properties during granulation. Furthermore, both Ca²⁺ and Mg²⁺ could promote the sludge cells to secrete more PN and PS in EPS. Compared with Ca²⁺, Mg²⁺ had significant influence on the compositions of EPS of granular sludge. In addition, aerobic granular sludge cultivated with the dosage of Ca²⁺ and Mg²⁺ had stronger decontamination performances.

• Key words：SBR  aerobic granular sludge  extracellular polymeric substances (EPS)  PN  PS

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