A Comprehensive Review on Wastewater Nitrogen Removal and Its Recovery Processes

Abstract

Discharging large amounts of domestic and industrial wastewater drastically increases the reactive nitrogen content in aquatic ecosystems, which causes severe ecological stress and biodiversity loss. This paper reviews three common types of denitrification processes, including physical, chemical, and biological processes, and mainly focuses on the membrane technology for nitrogen recovery. The applicable conditions and effects of various treatment methods, as well as the advantages, disadvantages, and influencing factors of membrane technologies, are summarized. Finally, it is proposed that developing effective combinations of different treatment methods and researching new processes with high efficiency, economy, and energy savings, such as microbial fuel cells and anaerobic osmotic membrane bioreactors, are the research and development directions of wastewater treatment processes.

Meta-metabolome ecology reveals that geochemistry and microbial functional potential are linked to organic matter development across seven rivers

“…These Burkholderiales MAGs have consistent carbon, nitrogen, and sulfur processing functional potential, though those found in ER often encoded both an acetate kinase and pyruvate formate lyase and more diverse nitrogen metabolisms (Supplemental Figure 4). This may indicate that these organisms encounter more diverse carbon sources (e.g., short chain fatty acids) and nitrogen types due to their wastewater habitat (Cao et al, 2013; Zhou et al, 2023). While no Burkholderiales were observed within JR, this river shared members of the Order Flavobacteriales with AR, CR, and EFPC and the Order Rhizobiales with AR.…”

Car service station wastewater treatment using electrocoagulation technology

“…However, to control algal growth in water bodies, nitrogen removal from the treatment effluent is required before discharge. 40,41 Water quality with microbiological parameters can be used to determine the presence of bacteria, viruses, and parasites. The bacteria used as indicators were coliform bacteria.…”

Full-Scale Demonstration of Nitrogen Removal from Mature Landfill Leachate Using a Two-Stage Partial Nitritation and Anammox Process

“…Nitrogen in wastewater should be reduced before discharge to prevent water eutrophication [1]. Currently, most nitrogen (mainly ammonia nitrogen) in wastewater is removed using various biological pathways [2,3]. Among these, nitrification/denitrification via the nitrate pathway is widely implemented due to its ease of operation.…”