BioChem - DOS

Integration of fermentative biohydrogen with methanogenesis from fruit-vegetable waste using different pre-treatments

Energy conversion and management

Jia, X.; Li, M.; Xi, B.; Zhu, C.; Yang, Y.; Xia, T.; Song, C.; Pan, H.

Fruit-vegetable waste was subjected to three different pre-treatments to enrich the two-stage biofuel production potential. The fluorescence excitation-emission matrix (EEM) spectra coupled with parallel factor (PARAFAC) analysis and fluorescence regional integration analysis were utilised to investigate dissolved organic matter degradation during two-stage fermentation process. The results showed that compared with that of alkali and enzyme pre-treatments, the acid pre-treatment resulted in the maximum biogas production rates and proportion in the hydrogenogenic stage (10.11mL/h, 41.2% hydrogen) when combined with the methanogenic process (4.67mL/h, 76.1% methane). In addition, the analysis of soluble metabolites composition indicated that both ethanol- and butyric acid-type fermentation processes had taken place as a result of acid pre-treatment, whereas only butyric acid-type fermentation resulted from alkali and enzyme pre-treatments. The PARAFAC analysis modelling of the EEM spectra revealed three fluorescent components in the effluents of three fermentation stages and assumed that the projected characteristic value may be used as a rapidly obtained indicator for substrate degradation and system stability of a two-stage biofuel production process.

2014

Pergamon ; Elsevier Science Ltd

0196-8904

88

pp.1219-1227

10.1016/j.enconman.2014.02.015

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART70667607

Fruit-vegetable waste; Biohydrogen; Two-stage biofuel production; Pre-treatment; Excitation-emission matrix; Parallel factor analysis