Anaerobic storage as a pretreatment for enhanced biodegradability of dewatered sewage sludge |
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| Authors: | Huacheng XuPinjing He Guanzhao WangLiming Shao Duujong Lee |
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| Institution: | a State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
b Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan |
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| 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. |
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| Keywords: | Storage Biodegradability Dewatered sewage sludge Bio-drying |
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