Journal
BIORESOURCE TECHNOLOGY
Volume 148, Issue -, Pages 261-269Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.08.090
Keywords
Food wastewater; Organic loading rate (OLR); Thermophilic aerobic digestion (TAD); Protease activity; Microbial community
Funding
- Marine Biotechnology Program
- Ministry of Land, Transport and Maritime Affairs of Korean Government
- Advanced Biomass R&D Center (ABC) of Korea
- Ministry of Education, Science, and Technology [ABC-2012053889, R31-30005]
- WCU (World Class University) program through the National Research Foundation of Korea
- Manpower Development Program for Marine Energy
- Ministry of Land, Transportation and Maritime Affairs (MLTM) of Korean government
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To evaluate the applicability of single-stage thermophilic aerobic digestion (TAD) process treating high-strength food wastewater (FWW), TAD process was operated at four organic loading rates (OLRs) from 9.2 to 37.2 kg COD/c d. The effects of OLRs on microbial community changes were also examined. The highest volumetric removal rate (13.3 kg COD/m(3) d) and the highest thermo-stable protease activity (0.95 unit/mL) were detected at OLR = 18.6 kg COD/m(3) d. Denaturing gradient gel electrophoresis (DGGE) profiles and quantitative PCR (qPCR) results showed significant microbial community shifts in response to changes in OLR. In particular, DGGE and phylogenetic analysis demonstrate that the presence of Bacillus sp. (phylum of Firmicutes) was strongly correlated with efficient removal of organic particulates from high-strength food wastewater. (C) 2013 Elsevier Ltd. All rights reserved.
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