High-rate anaerobic treatment system for solid/lipid-rich wastewater using anaerobic baffled reactor with scum recovery
[Display omitted] •In the ABR, >90% of the inlet COD was removed and >70% of the inlet COD converted to energy.•ABR-DHS system achieved high-rate wastewater treatment system.•Biogas contributes to the scum formation.•Scum recovery contributes to achieving high-rate anaerobic treatment. A labor...
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Published in | Bioresource technology Vol. 263; pp. 145 - 152 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
England
Elsevier Ltd
01.09.2018
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Subjects | |
Online Access | Get full text |
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Summary: | [Display omitted]
•In the ABR, >90% of the inlet COD was removed and >70% of the inlet COD converted to energy.•ABR-DHS system achieved high-rate wastewater treatment system.•Biogas contributes to the scum formation.•Scum recovery contributes to achieving high-rate anaerobic treatment.
A laboratory scale experiment was conducted to investigate the treatment of solid/lipid-rich wastewater with an anaerobic baffled reactor (ABR) and a down-flow hanging sponge (DHS) reactor. In this study, experimental periods were divided into three phases to explore efficient treatment of solids and lipids in wastewater. In ABR, >90% of the influent chemical oxygen demand (COD) was removed and >70% of the removed COD was converted to methane under steady-state conditions during each phase. During this period, >4.5 kg COD m−3 d−1 was achieved on an average in Phases 1 and 3. Biogas contributed to scum formation, and the scum was categorized into lipid-rich and sludge-containing types, which have energy potentials of 53.4 and 212 kcal/kg-wet weight, respectively. Therefore, by recovering solids and lipids, which formed persistent scum, ABR can be applied as a high-rate treatment for solid/lipid-rich wastewater. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0960-8524 1873-2976 |
DOI: | 10.1016/j.biortech.2018.04.091 |