AUTHOR=Huo Shuhao , Wang Zhongming , Zhu Shunni , Shu Qing , Zhu Liandong , Qin Lei , Zhou Weizheng , Feng Pingzhong , Zhu Feifei , Yuan Zhenhong , Dong Renjie 

TITLE=Biomass Accumulation of Chlorella Zofingiensis G1 Cultures Grown Outdoors in Photobioreactors

JOURNAL=Frontiers in Energy Research

VOLUME=6

YEAR=2018

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2018.00049

DOI=10.3389/fenrg.2018.00049

ISSN=2296-598X

ABSTRACT=<p>The complicated and changeable weather conditions and pest invasion increase difficulties in outdoor microalgae cultivation. In this paper, outdoor microalgae cultivation experiments were investigated in Foshan city, South China. During June and August when the temperature is high, the cooling system-water spray combined shade tarpaulin can effectively reduce the temperature to 4–7°C in the 40 L vertical tubular outdoor photobioreactors. Under 300 mg/L urea and 200 mg/L ammonium bicarbonate conditions, <italic>Chlorella zofingiensis</italic> G1 had the largest biomass accumulation. Addition of acetic acid to adjust the pH of the medium can effectively improve the <italic>C. zofingiensis</italic> G1 biomass in the photobioreactor, which was four times more than that only through air ventilation conditions. The biomass accumulation of <italic>C. zofingiensis</italic> G1 was essentially unchanged during night time.</p>