BioChem - DOS

Cultivation of Chlorella zofingiensis in bench-scale outdoor ponds by regulation of pH using dairy wastewater in winter, South China

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Huo, S.; Wang, Z.; Zhu, S.; Zhou, W.; Dong, R.; Yuan, Z.

Cultivation of Chlorella zofingiensis and nutrients removal in dairy wastewater were investigated in bench-scale outdoor ponds in winter, South China. The impacts of the two types of pH regulations, 5~6% CO<SUB>2</SUB> and acetic acid (HAc) on this process were studied. After 6days cultivation, the removal rates of total nitrogen (TN) and orthophosphate (PO<SUB>4</SUB><SUP>3-</SUP>) using CO<SUB>2</SUB> regulation were better than those using HAc. The removal rates of PO<SUB>4</SUB><SUP>3-</SUP> and TN were 97.5% and 51.7%, respectively using CO<SUB>2</SUB> regulation; 79.6% (TN) and 42.0% (PO<SUB>4</SUB><SUP>3-</SUP>) were obtained using HAc regulation. Higher biomass, protein, sugar content, and stable pH control were found using CO<SUB>2</SUB> regulation. However, significantly higher lipid content (31.8%) was observed using HAc regulation. The dominant differences of fatty acids were the content of C18:1 and C18:3. The growth characteristics and environmental conditions especially during the typical logarithmic phase were also analyzed.

2012

Elsevier Applied Science

0960-8524

121

pp.76-82

10.1016/j.biortech.2012.07.012

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART63912666

Microalgae; pH adjustment; Wastewater; Biofuel; γ-Aminobutyric acid