Impact of anaerobic co‑digestion of ryegrass (RG) and cow manure (CM) on methane production and kinetic analysis

• The experiments used different ratios of ryegrass (RG) to cow manure (CM), specifically 100 % RG, 100 % CM, 25 % RG: 75 % CM, 50 % RG: 50 % CM, and 75 % RG: 25 % CM (M1, M2, M3, M4, and M5, respectively). • Anaerobic digestion systems designed for a retention duration of 15 to 20 days, during which peak methane production occurred. • The R2 values derived from the adjusted logistic model exceeded 0.993, whilst those obtained from the adjusted Gompertz model were above 0.980. • The highest methane production value recorded for the M4 of 299.048 LCH₄/KgVS. This study investigated the impact of anaerobic co-digestion of ryegrass and cow manure at moderate temperatures (35 °C) for 30 days on methane production.…