?url_ver=Z39.88-2004&rft_id=10.14419%2Fijet.v7i4.35.22314&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=G.&rft.au=Hayder%2C+G.&rft.aulast=Hayder&rft.title=International+Journal+of+Engineering+and+Technology(UAE)&rft.date=2018&rft.issue=4&rft.volume=7&rft.issn=2227524X&rft.pages=22-25&rft.atitle=Treatment+of+domestic+wastewater+with+fixed+bed+biofilm+reactor&rft.genre=article