Electrochemical Stripping to Recover Nitrogen from Source-Separated Urine
By Tarpeh, William A.; Barazesh, James M.; Cath, Tzahi Y.; Nelson, Kara L.
Published in Environmental Science & Technology
2018
Abstract
Recovering nitrogen from separately collected urine can potentially reduce costs and energy of wastewater nitrogen removal and fertilizer production. Through benchtop experiments, we demonstrate the recovery of nitrogen from urine as ammonium sulfate using electrochemical stripping, a combination of electrodialysis and membrane stripping. Nitrogen was selectively recovered with 93% efficiency in batch experiments with real urine and required 30.6 MJ kg N