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.

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 Technol

journal_title

Bioresource technology

authors

Mirghorayshi M,Zinatizadeh AA,Van Loosdrecht M

doi

10.1016/j.biortech.2018.03.048

subject

Has Abstract

pub_date

2018-07-01 00:00:00

pages

44-52

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(18)30386-9

journal_volume

260

pub_type

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