Thamer J. Mohammed; Mohammed G. Albarazanje
Abstract
This research aimed to study the removal efficiency of oilpollutant from industrial wastewater by dissolved-air flotation (DAF)with and without chemical coagulants. The sample test ...
Read More ...
This research aimed to study the removal efficiency of oilpollutant from industrial wastewater by dissolved-air flotation (DAF)with and without chemical coagulants. The sample test of wastewater isdischarged from Daura Refinery. The performance of dissolved airflotation for example saturation pressure and recycle ratio were studied.The industrial wastewater treated by DAF is carried out with two typesof chemical coagulants: Alum and Polyacrylamid. The treatment methodof wastewater by DAF with and without chemical coagulants and theireffect on the removal efficiency of oil, results were obtained at differentparameters such as saturation pressure (2,5-5.5atm) and recycle ratio(20-50). It has been found the oil removal efficiency (R %) increases withincrease in recycle ratio (R.R) and saturation pressure (P). Themaximum oil removal efficiency in DAF unit without coagulants is foundto be equal to 60%, while with polyacrylamide coagulants is equal to 94,90 %, while with alum coagulants is equal to 89, 82 % and withcombination of alum+ polyacrylamide coagulants is equal to 98.96,95.5 % for initial oil concentration (Co) 50, 200 ppm respectively. Theexperimental results were indicated the removal efficiency of oil by usingpolyacrylamide as alone is more effective than adding alum butcombination of them, resulted improvement in removal efficiency. Theexperimental results of DAF process with coagulants are expressed indevelop general empirical correlation by chemical cad in computerprogram.
