title: [Performance and substrate inhibition kinetics model of nitritation process in inverse turbulent bed reactor].
abstract: The performance of a nitritation inverse turbulent bed (ITB) reactor was tested and the substrate inhibition kinetics characteristics of the reactor were analyzed. The results showed that a rapid reactor startup could be realized within 20 d with a strategy that combined the biofilm attachment method named "precoating carrier treatment" and "rapid suspending sludge discharge", with the feeding strategy named "low strength, high load". When operated at a hydraulic retention time of 3 h and influent NH4(+) -N of 700 mg x L(-1), corresponding to a nitrogen loading rate of 5.60 kg x (m3 x d)(-1), a maximum NH4(+) -N removal rate of 4.25 kg x (m3 x d)(-1) was observed. The maximum NO2(-) -N production rate was as high as 3.70 kg x (m3 x d)(-1). Four inhibition kinetic models (Haldane, Edwards, Aiba and Luong) were analyzed through non-linear regression to represent the inhibitions caused by substrate of nitritation process and the parameters of models were gained, which were r(max) of 1.84 kg x (m3 x d)(-1), K(IH) of 97.4 mg x L(-1) and K(m) of 0.188 mg x L(-1) for Haldane model, and r(max) of 1.83 kg x (m3 x d)(-1) and K(IA) of 114 mg x L(-1) for Aiba model. It was proposed that Haldane and Aiba models well fitted the process data harvested in the ITB reactor.
authors.affiliation: Department of Environmental Science, Hangzhou Normal University, Hangzhou 310036, China. jrczju@yahoo.com.cn
authors.forename: Ren-Cun
authors.initials: RC
authors.lastname: Jin
authors.forename: Guang-Feng
authors.initials: GF
authors.lastname: Yang
authors.forename: Chun
authors.initials: C
authors.lastname: Ma
authors.forename: Ping
authors.initials: P
authors.lastname: Zheng
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors / Q000382:microbiology; D007700:Kinetics; D008962:Models, Theoretical; D009584:Nitrogen / Q000737:chemistry / Q000302:isolation & purification*; D013379:Substrate Specificity; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D009584:Nitrogen