BioChem - DOS

Bioconversion of de-oiled Jatropha Waste (DJW) to hydrogen and methane gas by anaerobic fermentation: Influence of substrate concentration, temperature and pH

International journal of hydrogen energy

Kumar, G.; Lin, C.Y.

Cellulosic materials-based de-oiled Jatropha Waste (DJW) was fermented to H<SUB>2</SUB> and CH<SUB>4</SUB> using sewage sludge inoculum. Batch assays were performed at various substrate concentrations (40-240 g/L), temperatures (25-65 <SUP>o</SUP>C) and pHs (5.5-7.5). The peak hydrogen production rate (HPR) and hydrogen yield (HY) of 744.0 +/- 11.3 mL H<SUB>2</SUB>/L-d and 10.6 +/- 0.2 mL H<SUB>2</SUB>/g VS obtained when the optimal substrate concentration, pH, temperature were 200 g/L, 6.5, 55 <SUP>o</SUP>C, respectively. The peak methane production rate (MPR) of 178.4 +/- 5.6 mL CH<SUB>4</SUB>/L-d obtained while DJW concentration, pH, temperature were 200 g/L, 7.0, 45 <SUP>o</SUP>C, however, peak methane yield (MY) of 23.3 +/- 0.1 mL CH<SUB>4</SUB>/g VS obtained at 40 g/L, 7.0 and 55 <SUP>o</SUP>C, respectively. Effect of substrate concentration on HPR and MPR was elucidated using Monod model. Butyrate and acetate were the main soluble metabolic products. Maximal carbohydrate removal and COD reduction were achieved as 51.7 +/- 0.7% and 68.3 +/- 1.6%, respectively.

2013

Pergamon Press ; Elsevier Science Ltd

0360-3199

1879-3487

38

1

pp.63-72

10.1016/j.ijhydene.2012.10.053

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART65208417

de-Oiled Jatropha Waste; Hydrogen; Methane; Monod model; Soluble metabolic product