低浓度Fe^(3+)和Cu^(2+)对厌氧颗粒污泥性能的影响

Effect of Low Fe^(3+) and Cu^(2+) on Performance of Anaerobic Granular Sludge

在中温(35℃±1℃)厌氧条件下,以葡萄糖为有机碳源,采用间歇实验方法,研究了不同Fe3+,Cu2+浓度对厌氧颗粒污泥比产甲烷活性及COD去除率的影响。结果表明,当Fe3+浓度为1 mg.L-1~25 mg.L-1时,其比产甲烷活性(SMA)在162.1~254.4 mL.g-1d-1之间,COD去除率最高可达92%,Fe3+起促进作用的最佳浓度为22 mg.L-1。当Cu2+浓度为1~25 mg.L-1时,其SMA在153.6~266.4 mL.g-1d-1之间,COD去除率最高可达92.8%。Cu2+起促进作用的最大浓度为20 mg.L-1,其中最佳促进浓度为10 mg.L-1。

The effect of different Fe^3＋ and Cu^2＋ concentrations on specific methanogenic activity （SMA） of anaerobic granular sludge and COD removal rate were investigated using intermittent experiments under medium temperature （ 35±1℃ ） with artificial simulated wastewater of glucose as organic carbon nutrition. The experiment results indicated that, when the Fe^3＋ concentration was 1 - 25 mg· L^-1, the SMA of anaerobic granular sludge was 162.1 mL·（ g·d）^-1 - 254.4 mL·（ g ·d）^-1, the maximum COD removal rate reached 92%. The optimum stimulating concentration of Fe^3＋ was 22 mg·L^-1. While when the Cu^2＋ concentration was 1- 25 mg ·L^-1, the SMA of anaerobic granular sludge was 153.6 mL·（ g·d）^-1 - 266.4 mL·（g·d）^-1, the maximum removal rate of COD was 92.8%. The optimum Cu^2＋ concentration was 10 mg·L^-1, and the maximum stimulating concentration of Cu^2＋ was 20 mg·L^-1