TY - JOUR
T1 - Evaluating the process performance and potential of a high-rate single airlift bioreactor for simultaneous carbon and nitrogen removal through coupling different pathways from a nitrogen-rich wastewater
AU - Mirghorayshi, Mahsa
AU - Zinatizadeh, Ali Akbar
AU - Van Loosdrecht, Mark
PY - 2018/7/1
Y1 - 2018/7/1
N2 - 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.
AB - 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.
KW - Airlift bioreactor
KW - Anammox
KW - Biological nitrogen removal
KW - Low C/N wastewater
KW - Single bioreactor
UR - http://www.scopus.com/inward/record.url?scp=85044600175&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2018.03.048
DO - 10.1016/j.biortech.2018.03.048
M3 - Article
AN - SCOPUS:85044600175
SN - 0960-8524
VL - 260
SP - 44
EP - 52
JO - Bioresource Technology
JF - Bioresource Technology
ER -
