Pagga Udo, Bachner Jürgen, Strotmann Uwe
BASF Aktiengesellschaft, 67056 Ludwigshafen, Germany.
Chemosphere. 2006 Sep;65(1):1-8. doi: 10.1016/j.chemosphere.2006.03.021. Epub 2006 Apr 25.
The microbial elimination of nitrogen by combined nitrification and denitrification is a well-known technology in wastewater treatment processes. Nitrification in wastewater treatment plants is a sensitive microbiological process, which can be disturbed by toxic substances. Two laboratory methods for nitrification inhibition (ISO standard 9509 and a modification of the respiration inhibition test ISO 8192) were investigated with selected substances and compared with results from sewage model plants. For the prediction and prevention of interferences, the simple but reliable laboratory test methods proved to be very suitable. The tests in laboratory plants allowed a much more comprehensive evaluation of nitrification processes and showed their dependence on biodegradation and adaptation processes. The inhibition of nitrification depended on the mode of application and the biodegradability of the potential inhibitory compound and was much less severe with biodegradable substances than with poorly degradable ones.
通过硝化和反硝化联合作用实现微生物脱氮是废水处理过程中一项广为人知的技术。污水处理厂中的硝化作用是一个敏感的微生物过程，可能会受到有毒物质的干扰。采用选定物质对两种硝化抑制实验室方法（ISO标准9509以及呼吸抑制试验ISO 8192的一种改进方法）进行了研究，并与污水模型厂的结果进行了比较。对于干扰的预测和预防，事实证明这些简单但可靠的实验室测试方法非常适用。实验室装置中的测试能够对硝化过程进行更全面的评估，并显示出它们对生物降解和适应过程的依赖性。硝化抑制作用取决于潜在抑制化合物的施用方式和生物降解性，与难降解物质相比，可生物降解物质的抑制作用要小得多。
