Influence of Exogenous CO2 on Biomass and Lipid Accumulation of Microalgae Auxenochlorella protothecoides Cultivated in Concentrated Municipal Wastewater

Influence of Exogenous CO2 on Biomass and Lipid Accumulation of Microalgae Auxenochlorella protothecoides Cultivated in Concentrated Municipal Wastewater

2012

The effects of exogenous CO2 on the growth and lipid accumulation of a local screened facultative heterotrophic microalgae strain Auxenochlorella protothecoides (UMN280) as well as nutrient removal from concentrated municipal wastewater stream (centrate) were examined in this study. A 12-day batch experiment was conducted with CO2 aeration at three levels, namely, 0%, 1%, and 5% (v/v) CO2 mixed with air, under light intensity of 60 ?mol/(m2 @@s). A two-stage growth pattern was observed. The first stage (first–fifth day) was dominated by heterotrophic growth in which organic carbon was the main carbon source. The second stage (6th–12th day) was dominated by autotrophic growth in which exogenous CO2 had a positive effect on algal biomass accumulation. The addition of 5% CO2 was better than that of 1% CO2 on the biomass and lipid production. The uptakes of nutrients were similar between injection and no injection of CO2, except on phosphorus removal which was affected by the acidification of CO2.

Hu, Bing
Woodruff, Laurel G
Zhou, Wenguang
Li, Yecong
Mohr, Michael
Cheng, Yanling
Lei, Hanwu
Liu, Yuhuan
Lin, Xiangyang
Chen, Paul
Ruan, Roger

U of M- Dept. of Bioproducts/Biosystems Engineering and Center for Biorefining

12

Agricultural Drainage

municipal water
municipal waters
Wastewater
Waste water
waste-water
wastewaters
dissolved organic carbon
dissolved organic carbons
D.O.C
DOC
nutrient removal
nutrient removes
nutrient removing
nutrient remove

2010-2019

Yes

Do Not Have Copyright Permission

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