Disintegration of Wastewater Activated Sludge (WAS) for Improved Biogas Production
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Date
2019-12-21
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract
Due to rapid urbanization, the number of wastewater treatment plants (WWTP) has
increased, and so has the associated waste generated by them. Sustainable management of this
waste can lead to the creation of energy-rich biogas via fermentation processes. This review
presents recent advances in the anaerobic digestion processes that have led to greater biogas
production. Disintegration techniques for enhancing the fermentation of waste activated sludge
can be apportioned into biological, physical and chemical means, which are included in this review;
they were mainly compared and contrasted in terms of the ensuing biogas yield. It was found
that ultrasonic- and microwave-assisted disintegration provides the highest biogas yield (>500%)
although they tend to be the most energy demanding processes (>10,000 kJ kg−1
total solids).
Description
Subject(s)
biogas, renewable energy, anaerobic digestion, waste activated sludge, disintegration
Citation
ISSN
1996-1073