Evaluation of biogas production, from a biodigester using organic waste and wastewater generated at the Valledupar supply center

Abstract

In this article, methane production was evaluated from a biodigester, with a working capacity of 48 liters, residence time of 40 days and useful height of 49.6 cm. The biodigester was fed with organic waste and wastewater, with previous physical and physicochemical characterization, respectively. The biodigester mixture was neutralized with a 5% CaO solution to increase the pH from 4 to 7.2. Methane gas production was carried out from day 9 obtaining a maximum displacement of 200 ml per day 14. Total, methane production was 0.802 L, measured by displacement or mariotte bottle containing 3% NaOH solution content, in order to remove CO2. A Pearson correlation between methane production (CH4) and pH was estimated, obtaining a correlation of 0.96, indicating a strong positive correlation between the variables.