title: [Quick Start-up and Sustaining of Shortcut Nitrification in Continuous Flow Reactor].
abstract: How to achieve fast and stable startup of shortcut nitrification has a very important practical value for treatment of low C/N ratio wastewater. Thus, the quick start-up and sustaining of shortcut nitrification were investigated in continuous flow reactor targeting at the current situation of urban wastewater treatment plant using a continuous flow process. The results showed that quick start-up of shortcut nitrification could be successfully achieved in a continuous flow reactor after 60 days' operation with intermittent aeration and controlling of three stages of stop/aeration time (15 min/45 min, 45 min/45 min and 30 min/30 min). The nitrification rates could reach 90% or 95% respectively, while influent ammonia concentrations were 50 or 100 mg · L⁻¹ with stop/aeration time of 30 min/30 min. In addition, intermittent aeration could inhibit the activity of nitrite oxidizing bacteria (NOB), while short hydraulic retention time (HRT) may wash out NOB. And a combined use of both measures was beneficial to sustain shortcut nitrification.
authors.forename: Peng
authors.initials: P
authors.lastname: Wu
authors.lastname: Zhang Shi-ying
authors.forename: Yin-ling
authors.initials: YL
authors.lastname: Song
authors.forename: Yue-zhong
authors.initials: YZ
authors.lastname: Xu
authors.forename: Yao-liang
authors.initials: YL
authors.lastname: Shen
mesh_terms: D000641:Ammonia / Q000737:chemistry; D001419:Bacteria / Q000378:metabolism; D019149:Bioreactors; D058465:Nitrification; D009573:Nitrites / Q000737:chemistry; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000641:Ammonia; D009573:Nitrites; D062065:Wastewater