Influence of microwave irradiation on sludge dewaterability |
| |
Authors: | Qiang Yu Hengyi Lei Guangwei Yu Xin Feng Zhaoxu Li Zhicheng Wu |
| |
Affiliation: | aSchool of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China;bDepartment of Environmental Science and Engineering, South China Agriculture University, Guangzhou 510642, PR China |
| |
Abstract: | The study focuses on the effect of microwave irradiation on sludge dewaterability. Capillary suction time and specific resistance of filtration were used to evaluate sludge dewaterability. Soluble chemical oxygen demand, extracellular polymeric substance (EPS) content and sludge particle size were determined in an attempt to explain the observed changes in sludge dewaterability. The results indicated that microwave application slightly enhanced sludge dewaterability with short contact time, while it significantly deteriorated sludge dewaterability with long contact time. The results show that 900 W and 60 s is an ideal microwave condition, yielding maximum sludge dewaterability characteristics by generating sludge with optimal disintegration (1.5–2%), EPS concentration (1500–2000 mg/l), and particle size distribution (120–140 μm). |
| |
Keywords: | Sludge dewaterability Microwave irradiation Capillary suction time Contact time |
本文献已被 ScienceDirect 等数据库收录! |
|