A kinetic study was carried out in a sequencing batch reactor (SBR) (125 mg NH4+-N/L) inoculated with a physiologically stable nitrifying sludge not previously acclimated to sulfur compounds and fed at different initial sulfide concentrations (2.5-20.0 mg HS--S/L). Up to 10.0 mg HS--S/L, the nitrifying process kept stable and complete, reaching an ammonium consumption efficiency (ENH4+) of 100% and a nitrate yield (YNO3-) of 0.95 ± 0.03 mg NO3--N/mg NH4+-N consumed. At 15.0 and 20.0 mg HS--S/L, after an initial alteration in the nitrite oxidizing process, the YNO2- was decreasing throughout the cycles and the YNO3- increasing, obtaining in the last cycle at 20.0 mg HS--S/L, an ENH4+ of 100%, a YNO2- of zero, and a YNO3- of 0.80 mg NO3--N/mg NH4+-N consumed. At the end of the period at 20.0 mg HS--S/L, the specific rates of ammonium consumption and nitrate formation were 15 and 55% lower than their respective values in the control period without sulfide addition, showing that the sludge had a better metabolic adaptation for ammonium oxidizing activity than for nitrite oxidizing activity. The sludge acquired a higher sulfide oxidation capacity along the cycles. Bacterial population dynamics assessment indicated that the ammonium oxidizing bacteria (AOB) community was more diverse and stable than the nitrite oxidizing bacteria (NOB) community. The use of consortia with a previously stabilized nitrifying activity in SBR may constitute an alternative for eliminating simultaneously ammonium by nitrification and sulfide by sulfide oxidation and be implemented for the treatment of wastewater with ammonium and sulfide.

中文翻译：

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硝化测序间歇反应器中的生物铵和硫化物氧化：动力学和微生物种群动力学评估。

在定序分批反应器（SBR）（125 mg NH4 + -N / L）中进行了动力学研究，接种了生理稳定的硝化污泥，该污泥先前并未适应硫化合物，并以不同的初始硫化物浓度进料（2.5-20.0 mg HS- -S / L）。高达10.0 mg HS-S / L时，硝化过程保持稳定和完整，氨消耗效率（ENH4 +）为100％，硝酸盐产率（YNO3-）为0.95±0.03 mg NO3--N / mg NH4 + -N已消耗。在亚硝酸盐氧化过程中发生初始变化后，在15.0和20.0 mg HS-S / L时，YNO2-在整个循环中均下降，而YNO3-在整个循环中均以20.0 mg HS-S / L上升。 ，则消耗的ENH4 +为100％，YNO2-为零，YNO3-为0.80 mg NO3--N / mg NH4 + -N。在期末以20.0 mg HS-S / L计，在不添加硫化物的情况下，铵盐消耗和硝酸盐形成的比值分别比对照期间的值低15和55％，这表明污泥对铵氧化活性的代谢适应性优于对亚硝酸盐氧化活性的代谢适应性。在整个循环过程中，污泥的硫化物氧化能力更高。细菌种群动力学评估表明，铵氧化细菌（AOB）群落比亚硝酸盐氧化细菌（NOB）群落更多样化和稳定。在SBR中使用具有以前稳定的硝化活性的联合体可以替代通过硝化同时消除铵和通过硫化物氧化消除硫化物的替代方案，并可以用于处理具有铵和硫化物的废水。