Hydrothermal Treatment Technology of Municipal Sewage Sludge

Li Li Qian; Shu Zhong Wang; Xing Ying Tang

doi:10.4028/www.scientific.net/AMR.908.457

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 908Hydrothermal Treatment Technology of Municipal...

Hydrothermal Treatment Technology of Municipal Sewage Sludge

Abstract:

In China, over 28 million tons of dewatered sewage sludge, with 80 wt% moisture content, was generated from wastewater treatment plants in 2011. High moisture content is the bottleneck of sludge treatment and disposal. Thermal drying technology can significantly reduce the moisture content of sludge but its cost is too high. Hydrothermal treatment technology based on cell-break principle can efficiently and economically reduce the moisture content of sludge. This paper will introduce the specific process, features, treatment effect of this technology and propose an economic evaluation. The results show that hydrothermal treatment technology is a reasonable and economical method for treating sewage sludge in cities.