Institute for Epidemiology and Pathogen Diagnostics, Julius Kühn-Institute, Federal Research Center for Cultivated Plants (JKI), Messeweg 11-12, 38104 Braunschweig, Germany.
Water Environ Res. 2011 Jul;83(7):622-6. doi: 10.2175/106143011x12928814444493.
Inhibition of nitrification in the presence of low oxygen concentrations (below 1.2 mg/L) and temperature dependency at oxygen saturation levels were observed in an aerated treatment pond system with biofilm promoting mats in two parallel ponds for remediation of ammonium, methyl tertiary butyl ether (MTBE), and benzene-contaminated groundwater. Within the first 18 months, at an average oxygen concentration of 0.7 +/- 0.5 mg/L along the ponds, no significant decrease of ammonium or significant formation of nitrification products were observed. After increasing the aeration to oxygen saturation levels, the ammonium removal increased up to a maximum of 27%, with concomitant formation of nitrite and nitrate (up to 26 and 0.6 mM). The subsequent reduction of aeration in one pond to the previous level resulted in a definitive stop of nitrification, while, in the other pond, nitrification was well-correlated with the water temperature, reaching up to 45% ammonium removal.
在曝气处理池塘系统中，生物膜促进垫存在于两个平行池塘中，用于修复受铵、甲基叔丁基醚 (MTBE) 和苯污染的地下水。在最初的 18 个月内，在池塘中平均氧浓度为 0.7 +/- 0.5 毫克/升的情况下，没有观察到铵的显著减少或硝化产物的显著形成。在增加曝气至氧气饱和水平后，铵的去除率最高增加了 27%，同时形成亚硝酸盐和硝酸盐（最高 26 和 0.6 毫摩尔）。在一个池塘中将曝气随后减少到之前的水平导致硝化作用完全停止，而在另一个池塘中，硝化作用与水温密切相关，最高可去除 45%的铵。
