Ultrasound Enhanced Biomass Energy Conversion Technology of Excess Sludge
The excess sludge from wastewater treatment plants can be converted to methane or hydrogen through appropriate anaerobic digestion process, which is an effective way to prevent pollution and recover biomass energy. However, the lower conversion rate that results in long residence time and large digester volume limits its application. The ultrasonic technology can be applied to effectively improve the biomass conversion of excess sludege during anaerobic digestion process. In this review, the mechanism and main influencing factors of ultrasonic enhancement were summarized, and the current research situation and future development were presented as well.
Hexing Li, Qunjie Xu and Daquan Zhang
Y. X. Yan et al., "Ultrasound Enhanced Biomass Energy Conversion Technology of Excess Sludge", Advanced Materials Research, Vols. 356-360, pp. 1914-1918, 2012