生物炭基絮凝剂对河道底泥的脱水效果及应用  

Effect and Application of Biochar Based Flocculants on River Sediments Dewatering

作　　者：董志强 彭斯涵 刘雪平 李瑾如 杨蒙岭 何海涛 DONG Zhiqiang;PENG Sihan;LIU Xueping;LI Jinru;YANG Mengling;HE Haitao(Municipal Environmental Protection Engineering Co.,Ltd.of CREC Shanghai Group,Shanghai 200436,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;China Railway Engineering Group Co.,Ltd.,Beijing 100039,China;Shanghai Civil Engineering Group Co.,Ltd.of CREC,Shanghai 201906,China;China Railway Construction Machinery Rental Co.,Ltd.,Beijing 101300,China)

机构地区：[1]中铁上海工程局集团市政环保工程有限公司,上海200436 [2]同济大学环境科学与工程学院,上海200092 [3]中国铁路工程集团有限公司,北京100039 [4]中铁上海工程局集团有限公司,上海201906 [5]中国铁工投资建设集团有限公司,北京101300

出　　处：《净水技术》2025年第3期153-158,200,共7页Water Purification Technology

基　　金：中国中铁股份有限公司重大课题(2022-重大-23);上海市青年科技启明星项目资助(23QB1406400)。

摘　　要：河道底泥的固化脱水是底泥疏浚过程中的关键步骤。【目的】文章主要探究了生物炭基絮凝剂投加量对河道底泥脱水性能的影响。【方法】通过污泥比阻、污泥压滤液水质检测等试验探究了三氯化铁、聚合氯化铝(PAC)、聚丙烯酰胺(PAM)和污泥基生物炭在不同配比组成下对底泥脱水效果的影响。【结果】最终确定污泥基生物炭具有较好的水质改善效果,且结合成本、脱水效率确定絮凝剂PAM:PAC:污泥基生物炭最佳投加比例为0.03%∶1%∶3%。【结论】在此基础上进一步进行实际项目应用,结果表明,投加上述生物炭基絮凝剂后河道底泥的脱水效果得到了明显改善。The solidification and dewatering of river sludge is a key step in process of sludge dredging.[Objective]This paper mainly studied the effect of the dosage of biochar based flocculants on the dewatering performance of river sludge.[Methods]Through experiments such as sludge specific resistance and tail water quality detection,the influence of FeCl3,polymerised aluminum chloride,polyacrylamide,and sludge based biochar on the dewatering effect of sludge under different ratios was explored.Finally,it was determined that sludge based biochar has a good water quality improvement effect.[Results]Based on cost and dewatering efficiency,the optimal dosage ratio of flocculant PAM∶PAC∶sludge based biochar was determined to be 0.03%∶1%∶3%.[Conclusion]On this basis,further practical project applications are carried out,and the result shows that the dewatering effect of river sludge is significantly improved after the addition of the aforementioned biochar based flocculant.

关 键 词：底泥 生物炭 絮凝剂 污泥比阻 脱水固化 

分 类 号：X703[环境科学与工程—环境工程]