亚硝酸盐
硝化作用
铵
化学
呼吸测定法
硝酸盐
生物量(生态学)
基质(水族馆)
传质
环境化学
无机化学
色谱法
氮气
生物化学
有机化学
生态学
生物
作者
Julián Carrera,Irene Jubany,Lorena Carvallo,Rolando Chamy,Javier Lafuente
标识
DOI:10.1016/s0032-9592(03)00214-0
摘要
Ammonium oxidation to nitrite nitratation and nitrite oxidation to nitrate (nitratation) were studied in a suspended biomass system (SBS) and an immobilised biomass system (IBS). Nitritation and nitratation rates at several substrate concentrations were obtained through respirometry. Process kinetics were evaluated by comparing different substrate inhibition models. The applied statistical criteria prove that the Aiba equation is the best model to describe nitritation inhibition by ammonium in the SBS and the IBS whereas the Haldane equation is the best model to describe nitratation inhibition by nitrite in both systems. The ratios between the kinetic coefficients in both systems suggest that the IBS coefficients are influenced by internal mass transfer in the biofilm. Moreover, the small difference in these coefficient ratios in the nitritation and the nitratation processes suggests that the distribution of the ammonium-oxidising and the nitrite-oxidising biomasses in the biofilm is homogeneous.
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