Pilot-scale petroleum refinery wastewaters treatment systems: Performance and microbial communities' analysis. - Karray, Fatma; Aloui, Fathi; Jemli, Meryem; Mhiri, Najla; Loukil, Slim; Bouhdida, Rihab; Mouha, Nabil; Sayadi, Sami (Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B, 2020)