The augmentation of biochar produced at 450 and 600–650 °C hydrochar 250 has been investigated using biochemical methane potential experiments cellulose. feedstocks used for the char production included lignocellulosic (oak wood), macroalgae (Fucus serratus) aquatic plant (water hyacinth). Biomethane was improved with addition lower-temperature biochars from oak wood (285 mL CH4/g VS) water hya...