Journal
BIORESOURCE TECHNOLOGY
Volume 204, Issue -, Pages 171-176Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.12.052
Keywords
Phosphorus removal; Denitrification; Low excess sludge; Anaerobic sulfur oxidation
Funding
- JST/JICA
- SATREPS (Science and Technology Research Partnership for Sustainable Development)
- Japan Society for the Promotion of Science
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A sulfur-redox-reaction-activated up-flow anaerobic sludge blanket (UASB) and down-flow hanging sponge (DHS) system, combined with an anaerobic/anoxic sequencing batch reactor (A(2)SBR), has been used for municipal sewage treatment for over 2 years. The present system achieved a removal rate of 95 +/- 14% for BOD, 74 +/- 22% for total nitrogen, and 78 +/- 25% for total phosphorus, including low water temperature conditions. Sludge conversion rates during the operational period were 0.016 and 0.218 g-VSS g-COD-removed(-1) for the UASB, and DHS, respectively, which are similar to a conventional UASB-DHS system, which is not used of sulfur-redox-reaction, for sewage treatment. Using the sulfur-redox reaction made advanced treatment of municipal wastewater with minimal sludge generation possible, even in winter. Furthermore, the occurrence of a unique phenomenon, known as the anaerobic sulfur oxidation reaction, was confirmed in the UASB reactor under the winter season. (C) 2016 Published by Elsevier Ltd.
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