Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.watres.2017.11.059
Document accepted manuscript
Title (Primary) Microbial electricity driven anoxic ammonium removal
Author Vilajeliu-Pons, A.; Koch, C.; Balaguer, M.D.; Colprim, J.; Harnisch, F. ORCID logo ; Puig, S.
Source Titel Water Research
Year 2018
Department UMB
Volume 130
Page From 168
Page To 175
Language englisch
Keywords Bioelectrochemical system; Nitrogen cycle; Hydroxylamine; Microcosm; Cyclic voltammetry; Wastewater treatment
UFZ wide themes RU4;
Abstract Removal of nitrogen, mainly in form of ammonium (NH4+), in wastewater treatment plants (WWTPs) is a highly energy demanding process, mainly due to aeration. It causes costs of about half a million Euros per year in an average European WWTP. Alternative, more economical technologies for the removal of nitrogen compounds from wastewater are required. This study proves the complete anoxic conversion of ammonium (NH4+) to dinitrogen gas (N2) in continuously operated bioelectrochemical systems at the litre-scale. The removal rate is comparable to conventional WWTPs with 35 ± 10 g N m−3 d−1 with low accumulation of NO2, NO3, N2O. In contrast to classical aerobic nitrification, the energy consumption is considerable lower (1.16 ± 0.21 kWh kg−1 N, being more than 35 times less than for the conventional wastewater treatment). Biotic and abiotic control experiments confirmed that the anoxic nitrification was an electrochemical biological process mainly performed by Nitrosomonas with hydroxylamine as the main substrate (mid-point potential, Eox = +0.67 ± 0.08 V vs. SHE). This article proves the technical feasibility and reduction of costs for ammonium removal from wastewater, investigates the underlying mechanisms and discusses future engineering needs.
Persistent UFZ Identifier
Vilajeliu-Pons, A., Koch, C., Balaguer, M.D., Colprim, J., Harnisch, F., Puig, S. (2018):
Microbial electricity driven anoxic ammonium removal
Water Res. 130 , 168 - 175 10.1016/j.watres.2017.11.059