Enhanced Anaerobic Mono-digestion and Co-digestion of Crop Residues by NaOH Alkali Pre-treatment: Digestion Performance and Microbial Community Dynamics

The main objective of the study was to determine the effect of different dosages of NaOH alkali pre-treatment on the lignocellulosic structures and the methane production of crops’ residues. In this regard, NaOH pre-treatment was implemented with different dosages on three different crops’ residues: wheat, rye, and rice straws. Substrates were soaked into NaOH solutions at different dosages with solid-to-liquid ratios of 100 and 200 gTS/L to investigate both conditions. The anaerobic digestion process was conducted using AMPTS II under mesophilic conditions. By 8