Anaerobic Digestion of Lignocellulosic Substrates: Benefits of Pre-Treatments

Effect of acid pre-treatment on the anaerobic co-digestion of physicochemical sludge, poultry manure and sugarcane wastes (SCW) for biogas production

“…However, the ACD of agroindustrial wastes is usually limited due their complex lignocellulosic composition that presents resistance to hydrolysis, biodegradability, and low biogas yield [17,18]. For this reason, the use of treatments before AD has become a frequent practice [19], the variety of pre-treatment techniques can be classi ed as physical, chemical, biological, and the combination of these pretreatments implemented at the laboratory or pilot level, with different levels of success [20][21][22]. Studies conducted by Nava [5] evaluated the effect of thermal pre-treatment at low temperatures (80°C, 85°C, and 90°C) on the anaerobic digestion of two different mixtures of physicochemical sludge, broiler excreta, and sugarcane wastes (SCW), using as main response variables the degree of solubilization of organic matter and methane yield, the results showed an increase in the degree of solubilization of biodegradable organic matter and a signi cant increase in the rate of degradation in anaerobic conditions applying a thermal pre-treatment (90°C and 90 min).…”