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Title 

Enhancing microalgal biomass productivity by engineering a microalgal-bacterial community

Authors 

Dae Hyun ChoR RamananJina HeoJimin LeeByung-Hyuk KimHee-Mock OhHee-Sik Kim

Publisher 

Elsevier

Issue Date 

2015

Citation 

Bioresource Technology, vol. 175C, no. 0, pp. 578-585

Keywords 

Artificial microalgal bacterial communityBiodieselChlorella vulgarisGrowth enhancementPhycosphere bacteria

Abstract 

This study demonstrates that ecologically engineered bacterial consortium could enhance microalgal biomass and lipid productivities through carbon exchange. Phycosphere bacterial diversity analysis in xenic Chlorella vulgaris (XCV) confirmed the presence of growth enhancing and inhibiting microorganisms. Co-cultivation of axenic C. vulgaris (ACV) with four different growth enhancing bacteria revealed a symbiotic relationship with each bacterium. An artificial microalgal-bacterial consortium (AMBC) constituting these four bacteria and ACV showed that the bacterial consortium exerted a statistically significant (P<. 0.05) growth enhancement on ACV. Moreover, AMBC had superior flocculation efficiency, lipid content and quality. Studies on carbon exchange revealed that bacteria in AMBC might utilize fixed organic carbon released by microalgae, and in return, supply inorganic and low molecular weight (LMW) organic carbon influencing algal growth and metabolism. Such exchanges, although species specific, have enormous significance in carbon cycle and can be exploitated by microalgal biotechnology industry.

ISSN 

0960-8524

Link 

http://dx.doi.org/10.1016/j.biortech.2014.10.159

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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