Biomass production of a Scenedesmus sp. under phosphorous-starvation cultivation condition

► The possibility to produce more biomass using less phosphorous was proposed. ► Luxury uptake of phosphorous should be prevented during algal biomass production. ► Phosphorous starvation significantly enhanced biomass yield. ► A “phosphorous-starvation” cultivation mode was proposed. Microalgae-bas...

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Bibliographic Details
Published in:Bioresource technology 2012-05, Vol.112, p.193-198
Main Authors: Wu, Yin-Hu, Yu, Yin, Li, Xin, Hu, Hong-Ying, Su, Zhen-Feng
Format: Article
Language:English
Subjects:
bioenergy
Biomass
biomass production
Biomass yield
Cell Culture Techniques - methods
feedstocks
Microalgae biomass
monitoring
nitrogen
Nitrogen - metabolism
Nitrogen - pharmacology
nonrenewable resources
nutrient content
nutrient uptake
phosphates
Phosphorous consumption
Phosphorus - deficiency
Phosphorus - pharmacology
Scenedesmus
Scenedesmus - cytology
Scenedesmus - drug effects
Scenedesmus - growth & development
Scenedesmus sp. LX1
Solubility - drug effects
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Summary:► The possibility to produce more biomass using less phosphorous was proposed. ► Luxury uptake of phosphorous should be prevented during algal biomass production. ► Phosphorous starvation significantly enhanced biomass yield. ► A “phosphorous-starvation” cultivation mode was proposed. Microalgae-based bioenergy has gained extensive attention, but the consumption of non-renewable resource such as phosphorous is inevitable in the production of its feedstock. In this work, the minimal phosphorous consumption for algal biomass production of Scenedesmus sp. LX1 was investigated by monitoring the growth and nutrient uptake under two different cultivation modes: phosphorous-starvation and luxury-nutrient. The results showed that continuous nitrogen and phosphorous feeding in luxury-nutrient mode had no stimulating effect on biomass productivity at the nutrient level in this study, TN: 245mgL−1, TP: 5.4mgL−1. However, the sustained growth of biomass after the exhaust of phosphate in phosphorous-starvation mode led to significant increase in the biomass yield of phosphorous up to 160g biomass/g -P, which was nearly six times more than that with nutrient feeding. To minimize phosphorous resource consumption in production of algal biomass, a phosphorous-starvation cultivation mode is proposed.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2012.02.037