Utilization of response surface methodology in optimization of de-oiled olive pomace activated biochar productionRalf Ruffel Abarca, Mark Daniel de Luna, Sudip Chakraborty, Stefano Curcio and Sebastiano CandamanoE3S Web Conf., 148 (2020) 02006DOI: https://doi.org/10.1051/e3sconf/202014802006