title: Continuous fill intermittent decant type sequencing batch reactor application to upgrade the UASB treated sewage.
abstract: The performance of continuous flow intermittent decant type sequencing batch (CFID) reactor treating the effluent of an UASB reactor treating domestic wastewater and operated at 8 h hydraulic retention time (HRT) was investigated. The CFID was operated at three different HRTs (22, 8 and 6 h) and three different dissolved oxygen (DO) patterns (<0.5, 2.5-3.5 and 3.5-4.5 mg/L). The highest effluent quality was observed at the 8 h HRT and 2.5-3.5 mg/L DO concentration. At this operational condition, the average BOD, TSS, ammonia nitrogen and fecal coliform removal efficiencies were 83, 90, 74 and 99 %, respectively. The CFID is a promising post-treatment option for existing UASB systems, with a final effluent quality that comply with receiving water and effluent reuse criteria.
authors.affiliation: Department of Civil Engineering, IIT Roorkee, Roorkee 246447, India. dee.abid@gmail.com
authors.forename: Abid Ali
authors.initials: AA
authors.lastname: Khan
authors.forename: Rubia Zahid
authors.initials: RZ
authors.lastname: Gaur
authors.forename: Vasileios
authors.initials: V
authors.lastname: Diamantis
authors.forename: Beni
authors.initials: B
authors.lastname: Lew
authors.forename: Indu
authors.initials: I
authors.lastname: Mehrotra
authors.forename: A A
authors.initials: AA
authors.lastname: Kazmi
mesh_terms: D000641:Ammonia / Q000378:metabolism; D019149:Bioreactors / Q000382:microbiology*; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D012722:Sewage; D000641:Ammonia