SO2 Removal from the flue gas by hollow fibre membrane contactor Danu Ariono, Utjok W. R. Siagian, Anita K. Wardani, Ahmad N. Hakim and I Gede Wenten MATEC Web Conf., 156 (2018) 08007 Published online: 14 March 2018 DOI: 10.1051/matecconf/201815608007