西安市污水厂污泥脱水试验  

Experiment on Sludge Dewatering in a Wastewater Treatment Plant

作　　者：张庆丰[1] 张兴兴 王韬[1] 金虎[1] 王志盈[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]西安市污水厂,陕西西安710077

出　　处：《环境科学与技术》2008年第5期101-103,共3页Environmental Science & Technology

摘　　要：文章简要介绍了城市污水厂污泥的性质,并用不同的絮凝剂对城市污水污泥进行调质,结果表明阳离子型高分子絮凝剂能够取得较好的效果,并初步分析了絮凝剂的作用机理。对选定的药品进行生产性污泥脱水试验,结果使A2/O工艺的剩余污泥的平均含水率由97.4%降低至84.0%,普通活性污泥的平均含水率由93.2%降至70%。并分析了影响城市污泥脱水的因素及污泥脱水的成本分析。Property of sludge from urban wastewater treatment plant was introduced. Different kinds of polyelectrolyte were employed for sludge conditioning, and results showed that cationic polyelectrolyte with higher molecular can improve the sludge dewatering property. Mechanism of polyelectrolyte was analyzed and selected polyelectrolyte was used for sludge dewatering. The residual sludge with an average of 97.4% of water content rate was deduced to the sludge cake with water content rate of 84.0% and middle-load sludge with an average of 93.2% of water content rate was deduced to the sludge cake of water content rate of 70.0%. Factors influencing the sludge dewatering and the cost of dewatering were also analyzed.

关 键 词：城市污水厂污泥 调质 含水率 絮凝 脱水率 

分 类 号：X705[环境科学与工程—环境工程]