Insight into understanding the performance of electrochemical pretreatment on improving anaerobic biodegradability of yard waste

Sagarika Panigrahi, Hari Bhakta Sharma, Bikash Ranjan Tiwari, Nakka Vamsi Krishna, M.M. Ghangrekar and Brajesh Kumar Dubey

Renewable Energy, 2021, vol. 180, issue C, 1166-1178

Abstract: Electrochemical pretreatment is considered a promising technique to reduce recalcitrance nature of lignocellulosic biomass. Yet, a comprehensive knowledge on the performance of alkaline reagents in electrochemical pretreatment and the associated environmental impacts are at an early stage. The present study investigated and compared the effect of electrochemical pretreatment by using NaOH reagent (EN) and electrochemical pretreatment by using Ca(OH)2 reagent (EC). The results showed that, both pretreatment techniques elicited the structural breakdown of the biomass, as evidenced by compositional changes, supernatant properties, SEM, FTIR, and XRD analyses. The batch anaerobic digestion results revealed that the improvement in methane production was highest for the EC pretreatment (434 mL/gVS) followed by the EN pretreatment (346 mL/gVS) and the untreated yard waste (245 mL/gVS). The Modified Gompertz model showed the best fit for untreated and pretreated yard waste. The results of economic analysis confirmed the highest net profit of 8922 rupees (US$ 119.29) for EC pretreatment. The findings of life cycle analysis revealed that the net environmental performance considering the inventory used and the limitations of the system boundary was highest for EC pretreatment followed by EN pretreatment and untreated condition.

Keywords: Anaerobic digestion; Electrochemical pretreatment; Life cycle analysis; Kinetic models; Methane yield (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S096014812101291X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:180:y:2021:i:c:p:1166-1178

DOI: 10.1016/j.renene.2021.08.123

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().