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首页> 外文期刊>Brazilian Archives of Biology and Technology >The Potential of Denitrification for the Stabilization of Activated Sludge Processes Affected by Low Alkalinity Problems
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The Potential of Denitrification for the Stabilization of Activated Sludge Processes Affected by Low Alkalinity Problems

机译：受低碱度问题影响的稳定污泥过程的反硝化潜力

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摘要

In this study, the problems provoked by nitrification of wastewater with low alkalinity were analyzed in a pilotsequencing batch activated sludge reactor (SBR). Decrease in pH resulted in disappearence of protozoa. De-flocculation of the activated sludge floe started below pH 6.5, resulting in enhanced effluent turbidity and loss ofbacteria. Nitrification efficiency was affected below pH 6.2. The denitrification activity was not sufficient to keep upthe pH, due to a low C/N ratio of the wastewater. Based on alkalinity and ammonia concentration of the wastewaterand the necessary denitrification rate to prevent operational problems, was developed a prognostic diagram. Theapplicability of this diagram was tested for the SBR with excellent results. The diagram could be applied tooptimize the operation of wastewater treatment plants affected by problems with low alkalinity wastewater.
机译：在这项研究中，在中试分批活性污泥反应器（SBR）中分析了低碱度废水硝化引发的问题。 pH值降低导致原生动物消失。活性污泥絮凝物的絮凝作用在pH 6.5以下开始，从而导致污水浊度增强和细菌损失。 pH 6.2以下会影响硝化效率。由于废水的C / N比低，反硝化活性不足以保持pH值。根据废水的碱度和氨浓度以及防止运行问题所需的反硝化率，制定了预后图。该图的适用性已针对SBR进行了测试，结果极佳。该图可用于优化受低碱度废水影响的废水处理厂的运行。

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