TY - JFULL AU - H.A. Gasim and S.R.M. Kutty and M.H. Isa and M.P.M. Isa PY - 2012/3/ TI - Treatment of Petroleum Refinery Wastewater by using UASB Reactors T2 - International Journal of Environmental and Ecological Engineering SP - 57 EP - 61 VL - 6 SN - 1307-6892 UR - https://publications.waset.org/pdf/584 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 62, 2012 N2 - Petroleum refineries discharged large amount of wastewater -during the refining process- that contains hazardous constituents that is hard to degrade. Anaerobic treatment process is well known as an efficient method to degrade high strength wastewaters. Up-flow Anaerobic Sludge Blanker (UASB) is a common process used for various wastewater treatments. Two UASB reactors were set up and operated in parallel to evaluate the treatment efficiency of petroleum refinery wastewater. In this study four organic volumetric loading rates were applied (i.e. 0.58, 0.89, 1.21 and 2.34 kg/m3·d), two loads to each reactor. Each load was applied for a period of 60 days for the reactor to acclimatize and reach steady state, and then the second load applied. The chemical oxygen demand (COD) removals were satisfactory with the removal efficiencies at the loadings applied were 78, 82, 83 and 81 % respectively. ER -