Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7067139 | Bioresource Technology | 2018 | 40 Pages |
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 (10-20â¯h) and NH4+/(NH4++NO3â) 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+, NO3â, and TN removal. TN removal was enhanced with increase in HRT and decrease in NH4+/NH4++NO3â and at the optimum condition, 616â¯mg/L (88%) and 213â¯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.
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Authors
Mahsa Mirghorayshi, Ali Akbar Zinatizadeh, Mark Van Loosdrecht,