Abstract: Greater organic removal may result in less odorous sludge cake. Thermophilic (55℃) anaerobic digestion (TAD) and mesophilic (37℃) anaerobic digestion (MAD) were tested to understand if greater volatile solids reduction (VSR) could be related to less sulfur-based organic odor or volatile organic sulfur compounds (VOSCs) generation from dewatered and digested sludge. The TAD system removed 10% additional VS than the MAD system, which was reconfirmed by soluble and extractable biopolymer data. The TAD system held more soluble biopolymer than the MAD system while less extractable biopolymer was observed from TAD than MAD. However, greater organic solids removal did not result in lower odor in biopolymer cakes. Hydrogenotrophic methane formers might be responsible for less VOSC removal from thermophilically digested and dewatered sludge.
Keywords: Thermophilic anaerobic digestion, mesophilic anaerobic digestion, organic solid reduction, volatile organic sulfur compound.
Title: VS destruction and its impact on VOSC generation under thermophilic and mesophilic anaerobic digestion conditions
Author: Jongmin Kim
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
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