Potential Utilization of Sewage Sludge from Water Treatment Plant as Brick Material Budi Prasetyo Samadikun, Siti Rukayah, Ika Bagus Priyambada, Sry T. Romaito Lumbantobing and Mochamad Arief Budihardjo E3S Web Conf., 73 (2018) 05001 Published online: 21 December 2018 DOI: 10.1051/e3sconf/20187305001