Growth optimization of Parietochloris incisa for outdoor biomass production in Vertical Tubular Photobioreactors
Year: 2012
Type: article
Abstract: Considerable interest had been focused on the freshwater green microalga, Parietochloris incisa, due to its ability to accumulate substantial quantities of arachidonic acid (AA) .The current source of AA is a fungus, Mortierella alpina and P. incisa is being acknowledged as a potential plant source of AA at a commercial scale.This work involved growth optimization for biomass production in outdoor conditions using a Vertical Tubular Photobioreactor.The effect of different media formulations and nitrogen concentrations on biomass productivity were studied and the optimal cell density was defi ned.It was observed that high concentrations of nitrogen and other nutrients did not support signifi cantly higher productivities.Highest biomass productivity was obtained in Bold Basal medium with 1.5 gl -1 sodium nitrate at cell density range of 4.65 and 4.32 gl -1 for laboratory and outdoor grown inocula, respectively.The harvesting cycle of a semi-continuous culture investigation revealed that biomass productivity increased up to the 3 rd harvest but productivity sharply declined subsequently.The maximum biomass productivity of 0.7 gl -1 d -1 was achieved at the third harvest in the semi-continuous cultivation at initial cell density of 3.92 gl -1 .
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2168968328