Simultaneous Removal of Dissolved Methane and Nitrogen from Synthetic Mainstream Anaerobic Effluent

• DOI: 10.1021/acs.est.0c00912
• Publication Date: 2020-05-20T13:03:51Z
• Authors: Tao Liu; Jie Li; Zhuan Khai Lim; Hui Chen; Shihu Hu; Zhiguo Yuan; Jianhua Guo
• Keywords: Anammox

Anaerobic technologies have been proposed as a promising solution to enhance bioenergy recovery and transform wastewater treatment plant (WWTP) from an energy consumer exporter. However, 20-60% of the methane produced remains dissolved in anaerobically treated effluent, which is potent greenhouse gas easily stripped out aeration tank. This study aims develop using support denitrification, thus simultaneously enhancing nitrogen removal achieving beneficial use methane. By coupling anaerobic ammonium oxidation (anammox) with nitrite/nitrate-dependent (n-DAMO), up 85% more than 99% were removed parallel biofilm system. Mass balance was conducted during both long-term operation short-term batch tests, indicated that n-DAMO bacteria archaea indeed contributed jointly removal. The 16S rRNA gene amplicon sequencing further showed co-presence archaea, while anammox detected low relative abundance. technology can potentially be applied reduce carbon footprint save organic consumption WWTPs.