研究报告
黄晓婷,袁海平,周熠鸣,楼紫阳,朱南文.基质投加量对生物调理改善污泥脱水性能的影响[J].环境科学学报,2017,37(6):2137-2142
基质投加量对生物调理改善污泥脱水性能的影响
- Effect of agent dosage on sludge dewaterability by biological conditioning
- 基金项目：国家高技术研究发展计划项目（863计划）（No.2011AA060906）
- 作者
- 单位
- 黄晓婷
- 上海交通大学环境科学与工程学院, 上海 200240
- 袁海平
- 上海交通大学环境科学与工程学院, 上海 200240
- 周熠鸣
- 上海交通大学环境科学与工程学院, 上海 200240
- 楼紫阳
- 上海交通大学环境科学与工程学院, 上海 200240
- 朱南文
- 上海交通大学环境科学与工程学院, 上海 200240
- 摘要：通过在剩余污泥中投加FeSO4及S0的生物基质进行生物调理的方法改善污泥脱水性质.在确定两者的投加质量比为7∶3（FeSO4的质量以Fe2+计）的条件下，分别投加质量为污泥干重的10%、15%、20%、25%、30%的混合基质，结果表明当基质投加量为污泥干重的20%时，污泥的脱水性能最佳.其中，毛细吸水时间（CST）较对照组降低了38.71%，粘度下降了81.91%，泥饼含固率为对照组的135.19%.同时，污泥中的胞外聚合物（EPS）总量有了显著的下降，污泥絮体中的有机质从与污泥细胞更紧密结合的紧密型EPS（TB-EPS）中释放到较外层的疏松型EPS（LB-EPS）中，且Zeta电位接近中性，从而使得污泥脱水性能得到改善.
- Abstract：Effect of FeSO4 coupled with S0 addition on the dewaterability of sewage sludge by bioleaching was investigated. The dosage of agent was 10%, 15%, 20%, 25%, and 30% of the dried sludge in which the ratio of FeSO4 and S was 7:3 (the quantity of FeSO4 was considered by Fe2+). The results show that among the five dosages, 20% addition rate exhibited the most effectiveness in improving the sludge dewaterability. Under the optimal condition, the CST was reduced to 38.7%, lower than that of the control group, while the viscosity and solid content of sludge cake were 81.9% and 135% of that of the control group, respectively. Furthermore, the EPS in the sludge reduced rapidly, implying the organisms in the flocs could release from the TB-EPS into the LB-EPS or supernatant. The Zeta potential was also increased to near zero at the 20% dosage. The results obtained from this study indicated FeSO4 coupled with S could effectively improve sludge dewaterability.
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