Impact of Fe3O4 Nanoparticles on Methane Production from Anaerobic Digestion and Kinetic Analysis

Anaerobic digestion (AD) is one of the most widely used processes to stabilize waste sewage sludge and produce biogas as renewable energy. This study investigated effects Fe3O4 NPs at different concentrations (0,100 300 mg/L) on AD. 100mg/L could increase gas production by 21.9% reach highest methane content 66.75%. In addition, 100 mg/L kept pH an appropriate level. Scanning electron microscope (SEM) was changes in surface morphology sludge. The dynamics cumulative daily were studied using Logistic model modified Gompertz respectively. Other indices also had changed whole process, which end lead variation production. These results suggested that microbial activity relevant enzyme activities, caused transitions between phases system.