Wood Biochar Enhances the Valorisation of the Anaerobic Digestion of Chicken Manure

In this study, the efficacy of biochar to mitigate ammonia stress and improve methane production is investigated. Chicken manure (CM) was subjected high-solid mesophilic anaerobic digestion (15% total solid content) with wood (BC). Wood further treated using HNO3 NaOH produce acid–alkali-treated (TBC), an improvement in its overall ammonium adsorption capacity porosity. Three treatments were loaded triplicate into digesters, without biochar, maintained at 37 °C for 110 days. The study found a significant CH4 formation kinetics via enhanced substrate degradation, leading 74.7 mL g?1 VS 70.1 by BC TBC treatments, compared 39.5 control on 28th day, respectively. However, only use able prolong during semi-inhibition phase. also resulted highest removal nitrogen (TAN) 86.3%. addition, treatment preserved microbial biomass day 110. presence increase electrical conductivity, possibly promoting DIET-mediated methanogenesis. Overall, acid–alkali can be novel approach biochar’s existing characteristics utilisation as additive digestion.