BioChem - DOS

Promotion of H2 production by microwave-assisted treatment of water hyacinth with dilute H2SO4 through combined dark fermentation and photofermentation

Energy conversion and management

Cheng, J.; Xia, A.; Su, H.; Song, W.; Zhou, J.; Cen, K.

Water hyacinth was treated with microwave-assisted dilute H<SUB>2</SUB>SO<SUB>4</SUB> to improve saccharification before enzymatic hydrolysis and H<SUB>2</SUB> production during dark fermentation. A maximum reducing sugar (RS) yield of 64.4g/100g total volatile solid (TVS) (96.1% of the theoretical RS yield) was achieved when water hyacinth was treated through microwave heating with 1% dilute H<SUB>2</SUB>SO<SUB>4</SUB> for 15min at 140<SUP>o</SUP>C and then enzymatically hydrolyzed for 72h. During enzymatic hydrolysis, glucose was efficiently produced from the hydrolysis of cellulose that resulted from the disruption of the lignocellulosic structure of water hyacinth after microwave-assisted H<SUB>2</SUB>SO<SUB>4</SUB> treatment. When the hydrolyzed water hyacinth was inoculated with H<SUB>2</SUB>-producing bacteria to produce H<SUB>2</SUB> during dark fermentation, a maximum H<SUB>2</SUB> yield of 112.3ml/g TVS was obtained. The major sugar compositions in the residual solution from dark fermentation were xylose and cellobiose (total RS utilization efficiency: 88.5%). Through a combination of dark fermentation and photofermentation, the maximum H<SUB>2</SUB> yield from water hyacinth was significantly increased from 112.3ml/g TVS to 751.5ml/g TVS, which is 75.2% of the theoretical H<SUB>2</SUB> yield.

2013

Pergamon ; Elsevier Science Ltd

0196-8904

73

pp.329-334

10.1016/j.enconman.2013.05.018

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART66290220

Water hyacinth; H2 production; Dark fermentation; Photofermentation; Microwave heating; Enzymatic hydrolysis