Enhanced production of green tide algal biomass through additional carbon supply

de Paula Silva, Pedro H., Paul, Nicholas A., de Nys, Rocky, and Mata, Leonardo (2013) Enhanced production of green tide algal biomass through additional carbon supply. PLoS ONE, 8 (12). e81164. pp. 1-7.

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Abstract

Intensive algal cultivation usually requires a high flux of dissolved inorganic carbon (Ci) to support productivity, particularly for high density algal cultures. Carbon dioxide (CO2) enrichment can be used to overcome Ci limitation and enhance productivity of algae in intensive culture, however, it is unclear whether algal species with the ability to utilise bicarbonate (HCO3−) as a carbon source for photosynthesis will benefit from CO2 enrichment. This study quantified the HCO3− affinity of three green tide algal species, Cladophora coelothrix, Cladophora patentiramea and Chaetomorpha linum, targeted for biomass and bioenergy production. Subsequently, we quantified productivity and carbon, nitrogen and ash content in response to CO2 enrichment. All three species had similar high pH compensation points (9.7–9.9), and grew at similar rates up to pH 9, demonstrating HCO3− utilization. Algal cultures enriched with CO2 as a carbon source had 30% more total Ci available, supplying twenty five times more CO2 than the control. This higher Ci significantly enhanced the productivity of Cladophora coelothrix (26%), Chaetomorpha linum (24%) and to a lesser extent for Cladophora patentiramea (11%), compared to controls. We demonstrated that supplying carbon as CO2 can enhance the productivity of targeted green tide algal species under intensive culture, despite their clear ability to utilise HCO3−.

Item ID: 30910
Item Type: Article (Research - C1)
ISSN: 1932-6203
Additional Information:

© 2013 de Paula Silva et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Funders: Advanced Manufacturing Cooperative Research Centre (AMCRC), Australian Government Cooperative Research Centre Scheme, Australian Renewable Energy Agency
Projects and Grants: MBD Energy Research and Development program for Biological Carbon Capture and Storage
Date Deposited: 14 Jan 2014 01:39
FoR Codes: 10 TECHNOLOGY > 1002 Environmental Biotechnology > 100203 Bioremediation @ 50%
06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060701 Phycology (incl Marine Grasses) @ 50%
SEO Codes: 96 ENVIRONMENT > 9609 Land and Water Management > 960912 Urban and Industrial Water Management @ 100%
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