Advanced nitrogen removal with simultaneous Anammox and denitrification in sequencing batch reactor

Performance and microbial community of simultaneous anammox and denitrification (SAD) process in a sequencing batch reactor

“…NH 4 + -N and NO 2 À -N concentrations were fixed at around 80 and 160 mg/L, respectively. Trace elements were added according to Du et al (2014).…”

“…For nitrate, its effluent concentration exceeded the influent concentration at COD 6 100 mg/L, and then nitrate was completely removed as the COD concentration further increased. Du et al (2014) reported that the ammonium removal efficiency increased when a small amount of organic matter was added. Chamchoi et al (2008) reported that the ammonium removal efficiency dropped gradually with increasing COD; and regardless of its concentration, the organic matter could inhibit anammox but benefit denitrification.…”

“…However, these treatment systems are energy intensive, space demanding and generate high amounts of sludge (Bagchi et al, 2012). Recently, anaerobic ammonium oxidation (anammox) process has received much attention for its cost-effectiveness and high efficiency in removing nitrogen from wastewater (Du et al, 2014). As an autotrophic oxidation process, this process converts ammonium (NH 4 + ) to dinitrogen gas (N 2 ) using nitrite (NO 2 À ) as the electron acceptor, thus without requirement for aeration and addition of exogenous carbon sources compared to the conventional nitrification-denitrification process.…”

Nitrate Removal from Wastewater through Biological Denitrification with OGA 24 in a Batch Reactor

“…As demonstrated by the most recent literature, new bacterial strains are continuously isolated and tested for their NO3 − removal abilities [9][10][11][12][13]. Depending on their characteristics, different bacteria are employed in different waste treatment facilities, with a preference towards those microorganisms capable of combined heterotrophic nitrification and aerobic denitrification.…”

Microbial nitrogen removal pathways in integrated vertical-flow constructed wetland systems

“…However, there also exists an unconventional pathway-anaerobic ammonium oxidation (anammox)-in which ammonium is directly oxidized to N 2 under anaerobic conditions (Mulder et al, 1995). Recently, anammox has received considerable attention because it is an alternative N removal pathway at a low oxygen level and C/N ratio (Du et al, 2014). CWs could offer low dissolved oxygen (DO) concentration conditions for the anammox process (Zhu et al, 2010), and the anammox process has been successfully operated in HSSF-CWs (Wang and Li, 2011).…”