Abstract:
:The feasibility of a continuous feed and intermittent discharge airlift bioreactor for simultaneous carbon and nitrogen removal from a low COD/N wastewater was evaluated. The effect of two independent variables, HRT (10-20 h) and NH4+/(NH4++NO3-) ratio (0.25-0.75), on the bioreactor performance was studied. The relatively high anaerobic to aerobic time ratio made an effective contribution to NH4+, NO3-, and TN removal. TN removal was enhanced with increase in HRT and decrease in NH4+/NH4++NO3- and at the optimum condition, 616 mg/L (88%) and 213 mg/L (76%) of sCOD and TN were removed, respectively. The results suggested that the nitrogen removal process was based on a combination of anaerobic ammonium oxidation (Anammox), simultaneous nitrification-denitrification (SND), and presumable dissimilatory nitrate reduction to ammonium (DNRA) mechanisms.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Mirghorayshi M,Zinatizadeh AA,Van Loosdrecht Mdoi
10.1016/j.biortech.2018.03.048subject
Has Abstractpub_date
2018-07-01 00:00:00pages
44-52eissn
0960-8524issn
1873-2976pii
S0960-8524(18)30386-9journal_volume
260pub_type
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