Biological treatment of lignocellulosic biomass by Curvularia lunata for biogas production

Monika Yadav; Vivekanand Vivekanand

doi:10.1016/j.biortech.2020.123151

Biological treatment of lignocellulosic biomass by Curvularia lunata for biogas production

Bioresour Technol. 2020 Jun:306:123151. doi: 10.1016/j.biortech.2020.123151. Epub 2020 Mar 6.

Authors

Monika Yadav¹, Vivekanand Vivekanand²

Affiliations

¹ Centre for Energy and Environment, Malaviya National Institute of Technology Jaipur 302017, Rajasthan, India.
² Centre for Energy and Environment, Malaviya National Institute of Technology Jaipur 302017, Rajasthan, India. Electronic address: vivekanand.cee@mnit.ac.in.

PMID: 32197192
DOI: 10.1016/j.biortech.2020.123151

Abstract

In the present study, biological treatment of lignocellulosic biomass has been performed by employing Curvularia lunata. Optimization of treatment conditions was performed by using response surface methodology to reduce the duration of treatment time. Three factors were studied at three severity levels: temperature - 28, 32, 36 °C; moisture content - 65, 75, 85%; treatment time - 14, 28, 42 days. Released reducing sugars were considered as the output response as the disruption of lignin barrier by biological treatment should increase the quantity of free reducing sugar. Impact of different combinations of factors (at varying severity levels) on output response was studied to attain the optimized conditions: 32 °C, 23 days and 65% moisture. Predicted outcomes were aligned with the experimental results (R² = 0.93). After treating at optimized conditions, wheat and pearl millet straw were subjected to anaerobic digestion and showcased 19 and 28% increase in biogas production respectively as compared to the untreated straws.

Keywords: Biogas; Biological treatment; Lignocellulosic biomass; Response surface methodology.