BioChem - DOS

Enhancement of energy production efficiency from mixed biomass of Chlorella pyrenoidosa and cassava starch through combined hydrogen fermentation and methanogenesis

Applied energy

Xia, A.; Cheng, J.; Ding, L.; Lin, R.; Song, W.; Zhou, J.; Cen, K.

To enhance energy production efficiency (EPE) from microalgae Chlorella pyrenoidosa (CP), cassava starch (CS) was mixed with CP to optimise the carbon/nitrogen (C/N) ratio and facilitate efficient dark hydrogen fermentation, followed by photo hydrogen fermentation and methanogenesis. Steam heating with dilute acid was a preferred pre-treatment method to hydrolyze mixed biomass. The maximum dark hydrogen yield of 276.2mL/g total volatile solids (TVS) from the mixed biomass at C/N molar ratio of 25.3 showed 3.7-fold and 1.8-fold increases, respectively, compared with those from only CP and only CS. The maximum dark hydrogen production rate of 31.96mL/gTVS/h from the mixed biomass at the C/N molar ratio of 15.6 showed 3.4-fold and 3.7-fold increases, respectively, compared with those from only CP and only CS. The dark and photo hydrogen yield of 664.2mL/gTVS and the methane yield of 126.0mL/gTVS corresponded to a total EPE of 67.2%.

2014

Applied Science Publishers

0306-2619

1872-9118

120

pp.23-30

10.1016/j.apenergy.2014.01.045

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART68724772

Microalgae; Cassava starch; Hydrogen fermentation; Methanogenesis; Energy production efficiency