Resource-saving technology for oily wastewater treatment in agro-industrial complexes O.R. Ilyasov, S.N. Koshelev, O.V. Kovaleva, V.S. Khomyakova and O.A. Bykova E3S Web Conf., 282 (2021) 05004 Published online: 05 July 2021 DOI: 10.1051/e3sconf/202128205004