Dried alum sludge for sewage sludge dewatering performance improvement
Aluminum sulphate is commonly used as coagulant in current water treatment plants, correspondingly resulting in a large number of alum sludge production. Since dewatered alum sludge is composed of amorphous aluminium ions, it can be used as a valuable material, that is sewage sludge dewatering conditioner, in sewage sludge treatment. The study investigated the role of alum sludge in improving sewage sludge dewatering and settling performance and supernatant quality. The alum sludge was dried, grinded, and screened by 100 meshes filter. Taking this alum sludge 0.00g, 0.25g, 0.50g, 1.00g, 1.50g, 2.00g, 2.5g into seven 100 ml cylinders which were filled with sewage sludge, stirring 20s, 40s, 60s, 80s, 100s, and testing sewage sludge specific resistance (r), settling velocity (SV) and supernatant TP concentration. The optimum conditions of improving sewage sludge dewatering and settling performance and supernatant quality were 20g/L aluM sludge and 80s stirring time.
Alum sludge sewage sludge sludge specific resistance phosphorus removal
Yubo Cui Hongyan Li Yu Liu Qiang Ma Boya Tang
Department of Environmental Engineering, Dalian Nationalities University, Dalian 116600 School of Environmental and Biological Science and Technology, China University of Technology, Dalia School of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083
国际会议
2009 Beijing International Environmental Technology Conference(2009北京国际环境技术会议暨第五届“中、德、波环境技术研讨会)
北京
英文
234-237
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）