Exploring the potential of anaerobic co-digestion of water hyacinth and cattle dung for enhanced biomethanation and techno-economic feasibility

•Water hyacinth (WH) co-digested with cattle dung (CD) at various mixing ratios.•Co-digestion is a key approach for enhanced biogas and methane (CH4) production.•Co-digestion increased biogas and CH4 production by 111.3 and 173.6%, respectively.•Co-digestion improved bacterial population as given by VIT® gene probe technology.•WH/CD gate fee had a noticeable impact on co-digestion economic feasibility.