Side-stream sludge treatment using free nitrous acid selectively eliminates nitrite oxidizing bacteria and achieves the nitrite pathway

• Published in: Water research (Oxford) Vol. 55; pp. 245 - 255
• Main Authors: Wang, Qilin, Ye, Liu, Jiang, Guangming, Hu, Shihu, Yuan, Zhiguo
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15.05.2014; Elsevier
• Subjects: activated sludge; Applied sciences; Bacteria; Bacteria - metabolism; Biological and medical sciences; Biological treatment of waters; Bioreactors - microbiology; Biotechnology; Denitritation; energy recovery; Environment and pollution; Exact sciences and technology; fluorescence in situ hybridization; Free nitrous acid; Fundamental and applied biological sciences. Psychology; General purification processes; Industrial applications and implications. Economical aspects; methane production; municipal wastewater; Nitritation; Nitrite pathway; Nitrites; Nitrites - metabolism; nitrogen; nitrogen content; nitrogen dioxide; Nitrogen removal; Nitrous Acid - metabolism; nitrous oxide; Nitrous oxide (N2O); Oxidation; Pathways; Pollution; Reactors; Sewage - microbiology; Sludge; Sludge treatment; Strategy; Waste Disposal, Fluid - methods; wastewater treatment; Wastewaters; Water Purification; Water treatment and pollution; Nitrous oxide (N2O); Nitrite pathway; Nitritation; Free nitrous acid; Sludge treatment; Denitritation; Activated sludge; Water treatment; Nitrites; Nitrogen compounds; Recirculation; Biological purification; O; Bacteria; Nitrous oxide (N; Waste water purification; Nitrogen protoxide; Nitrous acid; Nitrous oxide (NO)

Nitrogen removal via nitrite (i.e. the nitrite pathway) is beneficial for carbon-limited biological wastewater treatment plants. This study presents a novel strategy for achieving the nitrite pathway, which involves recirculating a portion of the activated sludge through a side-stream sludge treatmen...