strategy for adaptation of indigenous halophilic consortium to iranian oilfield produced water

Produced water (pw) is a complex mixture of various organic and inorganic chemicals, some of which are recalcitrant or toxic# in the present study, adaptation of an indigenous halophilic consortium previously enriched in pw supplemented with yeast extract to a sample of southern iranian oilfield pw supplemented with nitrogen and phosphorous sources was investigated# experiments were carried out at: 1) erlenmeyer scale, 2) sequencing batch reactor (sbr)# results of runs at erlenmeyer scale pointed to the importance of gradual increase in the concentration of pw, and the supplemention of pw with organic carbon sources needed for microbial growth for successful adaptation# runs in sbr led to significant enhancement in cod removal (49#5%±5#2) compared to erlenmeyer runs (22#4%±4#5)# since the operation in sbr was discontinued due to biomass loss at the end of each cycle, membrane sbr for maintaining the biomass inside the reactor and performing the biological treatment process at a larger scale was recommended#