EXPERIMENTAL STUDY ON DRYING CHARACTERISTICS OF SEWAGE SLUDGE AT LOW TEMPERATURE
Drying characteristics of sewage sludge were studied of laboratory scale. Special made sludge additive agent was used to improve sewage sludge drying performance, and drying experiment was performed under different sludge additive agent ratio (0, 20％ and 30％), drying temperature (50℃, 60℃ and 75℃) and drying air velocity (2.2m/s, 1.94m/s and 1.67m/s). A new mode about water existent form in sewage sludge was brought forward. Experiments proved that sludge additive agent can improve the drying performance of sewage sludge by breaking down the water chains and reducing the water affinity between sludge solid granules. It was found that there was an optimal sludge additive agent ratio which can lead the best drying performance. The higher drying temperature and drying air velocity was, the larger drying rate would be.
sewage sludge drying characteristics drying rate sludge additive agent
Jun YANG Wan YU Pei-sheng LI Yi HU Jie LI Zhentao JING Niansu HU Yanan YUE Guolu YANG
College of Power & Mechanical Engineering, Wuhan University, Wuhan 430072, P.R.China Sewage Sludge a Dept.of Safety Supervision, Tech.& Envi.,China Huaneng Group,Beijing,100082,P.R.China Sewage Sludge and Silt Research Center, Wuhan University, Wuhan 430072, P.R.China School of Water Re
国际会议
第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)
武汉
英文
576-581
2007-12-01（万方平台首次上网日期，不代表论文的发表时间）