EFFECT OF SILICON OXIDE NANOADDITIVE ON BIOGAS AND METHANE YIELD OF ANAEROBIC DIGESTION OF COW DUNG AND SHEEP DUNG

Abstract

Anaerobic digestion of animal waste is a promising approach for renewable energy production, but enhancing its efficiency remains a challenge. This study investigates the effect of silicon oxide nanoadditive on the biogas and methane yield of anaerobic digestion using cow and sheep dung as substrates. Previous research suggests that nanoadditives can improve microbial activity and enhance biogas production. However, limited studies have focused on the specific impact of silicon oxide nanoadditive on biogas quality and methane yield, particularly using cow and sheep dung as feedstock. Cow and sheep dung samples were collected and subjected to anaerobic digestion with and without the addition of silicon oxide nanoadditive. Biogas composition including methane, carbon dioxide, hydrogen sulfide, and carbon monoxide was analyzed using gas chromatography. Addition of silicon oxide nanoadditive increased methane content in cow dung biogas from 64.9% to 65.7% and in sheep dung biogas from 59.3% to 60.2%. This enhancement suggests improved microbial activity and organic matter breakdown. The nanoadditive also reduced carbon dioxide content, indicating more efficient carbon conversion to methane. Additionally, it mitigated hydrogen sulfide content, particularly in sheep dung, improving overall gas quality. Silicon oxide nanoadditive shows promise in enhancing biogas quality and methane yield from cow and sheep dung. The findings highlight the potential of nanoadditives in optimizing anaerobic digestion processes for renewable energy production. Further research is recommended to optimize nanoadditive concentrations and assess long-term effects on anaerobic digestion performance. This study contributes to understanding the role of nanoadditives in improving biogas production from animal waste, advancing sustainable energy solutions.