Effect of hydraulic retention time on lactic acid production and granulation in an up-flow anaerobic sludge blanket reactor
- Authors
- Kim, Dong-Hoon; Lee, Mo-Kwon; Moon, Chungman; Yun, Yeo-Myeong; Lee, Wontae; Oh, Sae-Eun; Kim, Mi-Sun
- Issue Date
- Aug-2014
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Lactic acid; Hydraulic retention time (HRT); Up-flow anaerobic sludge blanket reactor (UASBr); Granulation; Hydrophobicity
- Citation
- BIORESOURCE TECHNOLOGY, v.165, pp.158 - 161
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 165
- Start Page
- 158
- End Page
- 161
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/2028
- DOI
- 10.1016/j.biortech.2014.03.097
- ISSN
- 0960-8524
- Abstract
- In the present work, lactic acid (LA) production performance with granulation was investigated at various hydraulic retention times (HRTs), 8-0.5 h. Glucose was used as a feedstock, and anaerobic mixed cultures were inoculated in an up-flow anaerobic sludge blanket reactor. As HRT decreased, the average diameter and hydrophobicity of the granules increased from 0.31 to 3.4 mm and from 17.5% to 38.3%, respectively, suggesting the successful formation of granules. With decreasing HRT, LA productivity increased up to 16.7 g LA/L-fermenter/h at HRT 0.5 h. The existence of rod-shaped organisms with pores and internal channels at granule surface was observed by scanning electron microscope. Next generation sequencing revealed that Lactobacillus was the dominant microorganism, accounting for 96.7% of total sequences, comprising LA-producing granules. (C) 2014 Elsevier Ltd. All rights reserved.
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Collections - Department of Environmental Engineering > 1. Journal Articles
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