title: Development of partial nitrification as a first step of nitrite shunt process in a Sequential Batch Reactor (SBR) using Ammonium Oxidizing Bacteria (AOB) controlled by mixing regime.
abstract: Shortcut biological nitrogen removal is a non-conventional way of removing nitrogen from wastewater using two processes either nitrite shunt or deammonification. In the nitrite shunt process, the ammonia oxidation step stops at the nitrite stage, which is known as partial nitrification, then nitrite is directly reduced to nitrogen gas. Effective partial nitrification could be achieved by accumulating Ammonia Oxidizing Bacteria (AOB) and inhibiting Nitrite Oxidizing Bacteria (NOB). In this research, a novel control strategy has been developed to control the DO using the variable mixing regime in a suspended growth system using a Sequential Batch Reactor (SBR) in order to achieve a stable ammonia removal efficiency (ARE) and nitrite accumulation rate (NAR) at a high nitrogen loading rate (NLR). The new controlled SBR system has been successfully running at NLR up to 1.2kg/(m3.day) and achieved an ARE of 98.6±2.8% and NAR of 93.0±0.7%.
authors.affiliation: Department of Civil Engineering, Lassonde School of Engineering, York University, Toronto, Ontario M3J 1P3, Canada.
authors.forename: Moomen
authors.initials: M
authors.lastname: Soliman
authors.affiliation: Department of Civil Engineering, Lassonde School of Engineering, York University, Toronto, Ontario M3J 1P3, Canada. Electronic address: Ahmed.eldyasti@lassonde.yorku.ca.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Eldyasti
mesh_terms: D000641:Ammonia / Q000737:chemistry; D001419:Bacteria; D019149:Bioreactors / Q000382:microbiology*; D058465:Nitrification; D009573:Nitrites / Q000737:chemistry; D009584:Nitrogen; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000641:Ammonia; D009573:Nitrites; D009584:Nitrogen; D062065:Wastewater
keywords: Ammonia oxidizing bacteria; Nitrite shunt; Partial nitrification; Sequential Batch Reactor; Shortcut biological nitrogen removal