Using ozonation to eliminate the inhibition of soluble algal products (SAP) of Scenedesmus sp. LX1 on its growth in microalgal cultivation for biomass/bioenergy production

Water recycling is an effective way to reduce water consumption in the industrialization of microalgae-based biomass/bioenergy production. The soluble algal products (SAP) which inhibit the microalgae growth will accumulate in the recycled water. Therefore, the ozone oxidation treatment of SAP produ...

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Bibliographic Details
Published in:Water science & technology. Water supply 2015-01, Vol.15 (5), p.1034-1039
Main Authors: Zhuang, Lin-Lan, Wu, Yin-Hu, Shi, Xiao-Jie, Zhang, Tian-Yuan, Hu, Hong-Ying
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Algae
Alternative energy sources
Biodiesel fuels
Biomass
Cultivation
Culture
Disinfection & disinfectants
Dissolved organic carbon
Energy resources
Experiments
Fluorescence
Growth rate
Hydrophobicity
Industrialization
Lipids
Microalgae
Molecular weight
Oxidation
Ozonation
Ozone
Ozonization
Petroleum production
Population growth
Pulp mill effluents
R&D
Renewable energy
Research & development
Scenedesmus
Water consumption
Water reuse
Water treatment
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Summary:Water recycling is an effective way to reduce water consumption in the industrialization of microalgae-based biomass/bioenergy production. The soluble algal products (SAP) which inhibit the microalgae growth will accumulate in the recycled water. Therefore, the ozone oxidation treatment of SAP produced by Scenedesmus sp. LX1 was studied to reduce the inhibition of SAP. The experimental results showed that there was almost no change in the content of SAP (counted by dissolved organic carbon) after ozonation, but the inhibition of SAP on microalgae growth disappeared. The intrinsic growth rate (r) of Scenedesmus sp. LX1 in the cultivation solution containing untreated SAP was 0.52 d−1, and it rose to 0.95 d−1 after SAP was ozonized. The maximum population growth rate (Rmax) followed a similar trend, increasing from 9.19 × 105 to 13.0 × 105 cells mL−1 d−1. It was suggested that the changes of fluorescence and hydrophilic–hydrophobic/acid–base property of SAP after ozonation leads to the disappearance of SAP inhibition on microalgae growth.
ISSN:1606-9749
1607-0798
DOI:10.2166/ws.2015.035