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http://dx.doi.org/10.17137/korrae.2018.26.2.53

Ultrasonic and Alkaline Pre-treatments of Waste Activated Sludge for Enhancing Anaerobic Digestion  

Park, In Geun (Division of Civil, Environmental and Energy Engineering, The University of Suwon)
Son, Han Hyung (Division of Civil, Environmental and Energy Engineering, The University of Suwon)
Lee, Chae Young (Division of Civil, Environmental and Energy Engineering, The University of Suwon)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.26, no.2, 2018 , pp. 53-63 More about this Journal
Abstract
The hydrolysis of organic solid waste, such as sludge, is the rate-limiting step of the anaerobic digestion. The longer rate-limiting step lead to decrease of treatment efficiency and increase hydraulic retention time and anaerobic digester. Therefore, the pre-treatment has been applied for accelerating the hydrolysis step. This study was investigated the effects of pre-treatment of waste activated sludge using ultrasonic and alkaline integrated treatment simultaneously. The results showed the cumulative methane production and the methane production rate increased while the lag phase decreased. Therefore ultrasonic and alkaline integrated pre-treatment of waste activated sludge resulted in acceleration of hydrolysis step in anaerobic digestion.
Keywords
Waste Activated Sludge; Ultrasonic; Alkaline; Pre-treatment; Anaerobic digestion;
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