Life cycle assessment of electrodialysis for sidestream nitrogen recovery in municipal wastewater treatment

Cleaner Environmental Systems

K.G. Karthikeyan¹  Donald Vineyard²  Andrea Hicks²  Phillip Barak³  Christy Davidson³ 

[1] University of Wisconsin-Madison, Department of Biological Systems Engineering, 228 Agricultural Engineering Building, 460 Henry Mall, Madison, WI, 53706, USA;University of Wisconsin-Madison, Department of Civil and Environmental Engineering, 1415 Engineering Drive, Madison, WI, 53706, USA;University of Wisconsin-Madison, Department of Soil Science, 1525 Observatory Drive, Madison, WI, 53706, USA;

关键词: Ammonium;    Anaerobic digest;    Modeling;    Anammox;    Nitrification;    Denitrification;   

DOI  :  

来源: DOAJ

【 摘 要 】

Nitrogen is removed during municipal wastewater treatment to reduce eutrophication of waterways and preserve drinking water quality. Nitrification-denitrification and sidestream partial nitrification-anammox are state-of-the-art municipal N removal technologies, but they require energy for aeration and can release nitrous oxide as a fugitive greenhouse gas. An emerging sidestream electrodialysis technology is intended to both remove and recover N as ammonium-based fertilizer. This midpoint life cycle assessment compiles literature values to compare the state-of-the-art technologies of municipal wastewater nitrogen removal to the new electrodialysis nitrogen removal and recovery technology, accounting for the offset of Haber-Bosch-derived ammonia. Electrodialysis is projected to be environmentally favorable compared to the state-of-the-art, predicting electricity savings similar to anammox and, with the offset of industrial ammonia manufacture, net negative emissions in five of ten midpoint environmental impact categories, including global warming potential.

【 授权许可】

Unknown