Optimization of thermo-alkaline disintegration of sewage sludge for enhanced biogas yield

► Characterization of sewage sludge to determine its quality for biogas generation. ► Sewage sludge disintegration at low temperature and concentration of NaOH. ► The statistical significance of operating variables on the disintegration process. ► Optimization of the disintegration process using response surface methodology. ► Investigation of the impact of disintegration on biogas yield.