Anammox is a widely adopted process for energy-efficient removal of nitrogen from
wastewater, but challenges with NOB suppression and NO 3− accumulation have led to a …

Anaerobic ammonium oxidation (anammox) has been extensively investigated for cost-
efficient nitrogen removal from wastewater. However, the major issues of nitrate (NO 3−-N) …

Life cycle assessment (LCA) has been widely applied in the wastewater industry, but
inconsistencies in assumptions and methods have made it difficult for researchers and …

It is now clear that several of the filamentous bacteria in activated sludge wastewater
treatment plants globally, are members of the phylum Chloroflexi. They appear to be more …

Highlights•Biological nitrogen removal and recovery approaches are reviewed.•Anammox
saves energy in side-stream treatment and is progressing toward mainstream.•Phototrophic …

Recently, the combined partial denitrification and anammox (PD/anammox) has received
special attention as a viable alternative for N removal using organic matter present in …

Wastewater treatment plants (WWTPs) alleviate water pollution but also induce resource
consumption and environmental impacts especially greenhouse gas (GHG) emissions …

Direct nitrous oxide (N 2 O) emissions during the biological nitrogen removal (BNR)
processes can significantly increase the carbon footprint of wastewater treatment plant …