Biogas upgrading to methane and removal of volatile organic compounds in a system of zero-valent iron and anaerobic granular sludge - Andronikou, M.; Lytras, N.; Chrysanthou, G.; Koutsokeras, L.; Constantinides, G.; Stylianou, M.; Agapiou, A.; Vyrides, I. (Environmental Science and Pollution Research, 2022)