TY - JOUR
T1 - Ammonia recovery from urine in a scaled-up Microbial Electrolysis Cell
AU - Zamora, Patricia
AU - Georgieva, Tanya
AU - ter Heijne, Annemiek
AU - Sleutels, Tom H.J.A.
AU - Jeremiasse, Adriaan W.
AU - Saakes, Michel
AU - Buisman, Cees J.N.
AU - Kuntke, Philipp
PY - 2017
Y1 - 2017
N2 - A two-step treatment system for nutrient and energy recovery from urine was successfully operated for six months. In the first step, phosphorus (P) was recovered as struvite (magnesium ammonium phosphate or MAP) in a MAP reactor. The effluent of this MAP reactor was used for total ammonia-nitrogen (TAN) recovery and hydrogen production in a Microbial Electrolysis Cell (MEC). This MEC was coupled to a Transmembranechemisorption (TMCS) module, in which the TAN was recovered as an ammonium sulphate solution. The MEC had a projected surface area of 0.5 m2 and was operated at different urine dilutions. The system was stable during the operation on 2 times diluted and undiluted urine at an applied voltage of 0.5 V with an average current density of 1.7 ± 0.2 A m−2. During stable current production, the TAN transport efficiency over the CEM was 92 ± 25% and the TAN recovery was 31 ± 59%. In terms of energy efficiency, the electrical energy required for the TAN recovery was 4.9 ± 1.0 MJ kgN−1, which is lower than competing electrochemical nitrogen removal/recovery technologies. Overall, this study shows, for the first time, the application of a scaled-up MEC for nutrient recovery from urine.
AB - A two-step treatment system for nutrient and energy recovery from urine was successfully operated for six months. In the first step, phosphorus (P) was recovered as struvite (magnesium ammonium phosphate or MAP) in a MAP reactor. The effluent of this MAP reactor was used for total ammonia-nitrogen (TAN) recovery and hydrogen production in a Microbial Electrolysis Cell (MEC). This MEC was coupled to a Transmembranechemisorption (TMCS) module, in which the TAN was recovered as an ammonium sulphate solution. The MEC had a projected surface area of 0.5 m2 and was operated at different urine dilutions. The system was stable during the operation on 2 times diluted and undiluted urine at an applied voltage of 0.5 V with an average current density of 1.7 ± 0.2 A m−2. During stable current production, the TAN transport efficiency over the CEM was 92 ± 25% and the TAN recovery was 31 ± 59%. In terms of energy efficiency, the electrical energy required for the TAN recovery was 4.9 ± 1.0 MJ kgN−1, which is lower than competing electrochemical nitrogen removal/recovery technologies. Overall, this study shows, for the first time, the application of a scaled-up MEC for nutrient recovery from urine.
KW - Ammonia recovery
KW - Microbial Electrolysis Cells
KW - Up-scaling bioelectrochemcial systems
KW - Urine treatment
U2 - 10.1016/j.jpowsour.2017.02.089
DO - 10.1016/j.jpowsour.2017.02.089
M3 - Article
AN - SCOPUS:85014760389
SN - 0378-7753
VL - 356
SP - 491
EP - 499
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
