Reducing Cost and Environmental Impact of Wastewater Treatment with Denitrifying Methanotrophs, Anammox, and Mainstream Anaerobic Treatment

• DOI: 10.1021/acs.est.9b04764
• Publication Date: 2019-10-08T18:17:15Z
• Authors: Kathryn I. Cogert; Ryan M. Ziels; Mari K.H. Winkler
• Keywords: Anammox

In water resource recovery facilities, sidestream biological nitrogen removal via anaerobic ammonium oxidation (anammox) is more energy and cost efficient than conventional nitrification-denitrification. However, under mainstream conditions, nitrite oxidizing bacteria (NOB) out-select anammox for produced by (AOB). Therefore, production the bottleneck in removal. Nitrate-dependent denitrifying methane archaea (n-damo) oxidize reduce nitrate to nitrite. The supply challenge implementation could be solved with a microbial community of AOB, NOB, n-damo, from sludge digestion or membrane bioreactor (AnMBR). environmental impact traditional nitrification/dentrification relative AOB/anammox AOB/anammox/n-damo systems, without an AnMBR, were compared stoichiometric model. AnMBR reduced costs emission rates at moderate high nutrient loading lowering aeration handling demands while increasing available cogeneration. AnMBR/AOB/anammox systems GHG up $0.303/d/m3 1.72 kg equiv. CO2/d/m3, respectively, AnMBR/AOB/anammox/n-damo saw similar reduction least $0.300/d/m3 1.65 CO2/d/m3 addition alleviating necessity stop nitrification nitrate, allowing easier control.