Purification of oily wastewater by hybrid UF/MD.
Investigations on the treatment of oily wastewater by a combination of ultrafiltration (UF) and membrane distillation (MD) as a final purification method have been performed. A tubular UF module equipped with polyvinylidene fluoride (PVDF) membranes and a capillary MD module with polypropylene membranes were tested using a typical bilge water collected from a harbour without pretreatment. The permeate obtained from the UF process generally contains less than 5 ppm of oil. A further purification of the UF permeate by membrane distillation results in a complete removal of oil from wastewater and a very high reduction of the total organic carbon (99.5%) and total dissolved solids (99.9%).
Gryta
M
M
Department of Water Technology and Environmental Engineering, Institute of Inorganic Chemical Technology and Environmental Engineering, Technical University of Szczecin, Poland. margryta@mailbox.tuniv.szczecin.pl
Karakulski
K
K
Morawski
A W
AW
D005374:Filtration; D007220:Industrial Waste; D008567:Membranes, Artificial; D009821:Oils / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D008567:Membranes, Artificial; D009821:Oils