Sludge conditioning of oil emulsion wastewater process by heat treatment using low temperatures in SiberiaTamara Khalturina, Olga Churbakova, Yuri Skolubovich, Evgeniy Voitov and Anna TsybaE3S Web Conf., 135 (2019) 01025DOI: https://doi.org/10.1051/e3sconf/201913501025