?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.jenvman.2020.110718&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=S.&rft.au=Waqas%2C+S.&rft.aulast=Waqas&rft.volume=268&rft.issn=03014797&rft.atitle=Recent+progress+in+integrated+fixed-film+activated+sludge+process+for+wastewater+treatment%3A+A+review&rft.title=Journal+of+Environmental+Management&rft.date=2020&rft.genre=article