Anaerobic storage as a pretreatment for enhanced biodegradability of dewatered sewage sludge
Journal
Bioresource Technology
Journal Volume
102
Journal Issue
2
Pages
667-671
Date Issued
2011
Author(s)
Abstract
Dewatered sewage sludge is often stored still before further processing and final disposal. This study showed that anaerobic storage of dewatered sewage sludge could hydrolyze organic matter from the sludge matrix, and increase soluble organic acid content from 90 to 2400. mg/L and soluble organic carbon content from 220 to 1650. mg/L. Correspondingly, the contents of proteins, celluloses and hemicelluloses were reduced by 2-9%. Applying anaerobic storage markedly enhanced the efficiency of the subsequent bio-drying process on stored sludge. Correspondingly, biogas and odor gas were produced immediately after commencing the sludge storage. Anaerobic storage with odor control can be applied as a pretreatment process for dewatered sewage sludge in wastewater treatment plants. ? 2010 Elsevier Ltd.
Subjects
Bio-drying
Biodegradability
Dewatered sewage sludge
Storage
SDGs
Type
journal article