Enhanced microalgal biomass and lipid production from a consortium of indigenous microalgae and bacteria present in municipal wastewater under gradually mixotrophic culture conditions
- Authors
- Cho, Hyun Uk; Kim, Young Mo; Park, Jong Moo
- Issue Date
- Mar-2017
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Microalgal-bacterial consortium; Mixotrophic culture; Volatile fatty acids (VFAs); Microalgal biomass; Fatty acids
- Citation
- BIORESOURCE TECHNOLOGY, v.228, pp.290 - 297
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 228
- Start Page
- 290
- End Page
- 297
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/20492
- DOI
- 10.1016/j.biortech.2016.12.094
- ISSN
- 0960-8524
- Abstract
- The goal of this study was to investigate the influences of gradually mixotrophic culture conditions on microalgal biomass and lipid production by a consortium of indigenous microalgae and bacteria present in raw municipal wastewater. Lab-scale photobioreactors containing the consortium were operated in repeated batch mode. Initial cultivation (phase I) was performed using only the municipal wastewater, then 10% and 25% of the reactor volumes were replaced with the effluent from a sewage sludge fermentation system producing volatile fatty acids (SSFV) at the beginnings of phase II and phase III, respectively. The highest biomass productivity (117.1 +/- 2.7 mg/L/d) was attained during phase II, but the lipid productivity (17.2 +/- 0.2 mg/L/d) was attained during phase III. The increase in the effluent from the SSFV influenced microalgal diversity with a preference for Chlorella sp., but bacterial diversity increased significantly during phase III.
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