STUDY ON TREATMENT OF TERTIARY OIL RECOVERY WASTEWATER BY MOVING-BED BIOREACTOR AND O_3/UV/H_2O_2

摘要

Industrial application of tertiary oil recovery technology has been realized in Daqing oilfield.A 9×10_6 tons of crude oil was obtained every year with its application.And a 6×10_7 tons of TORW was produced accordingly.TORW is different from conventional oil recovery wastewater in compositions.It not only contains oil,suspended solids,inorganic salts and bacteria,but also contains a large amount of high molecular weight polymer (usually is polyacrylamide,PAM,with molecular weight of 4~5×10_6 .TORW treated by current treatment processes in oilfield can not meet the requirement of the State Discharge Standard and would pollute the environment.