The Study on the Sludge Anaerobic Digestion after the Ultrasonic Treatment

Abstract:

This paper studied on the energy efficiency of the sludge anaerobic digestion after the pretreatment of ultrasonic wave. Adding ratio of the sludge after the ultrasonic pretreatment was 30 %，50 %，70 % respectively, the retention time of the digested sludge was 27 d，20 d，16 d. The experiment results show that to treat the sludge by ultrasonic wave in 50-90s is considered to be suitable and the Energy Consumption is relatively less. The ultrasonic disruption rate is 3 %-4.2 % which met the requirement of the sludge anaerobic digestion technique. When the adding ratio of the sludge by the ultrasonic pretreatment was 70 % and the retention time of the digested sludge was 20 d, the gas production of the unit sludge is the highest. When the adding ratio of the sludge by the ultrasonic pretreatment was 30 % and the retention time of the digested sludge was 20 d, the effect is better than others.

• Periodical: Applied Mechanics and Materials (Volumes 295-298)
• Pages: 1740-1744
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.295-298.1740
• Online since: February 2013
• Authors: Chun Hong Liu, Feng Wang
• Keywords: Adding Ratio of the Sludge, Sludge Retention Time, Ultrasonic Disruption Rate

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