Peng Y, Gao C, Wang S, Ozaki M, Takigawa A
College of Environmental And Energy Engineering, Beijing Polytechnic University, Beijing, 100022, China.
Water Sci Technol. 2003;47(11):289-95.
Deficiency in the nutrient supply such as nitrogen usually results in activated sludge bulking and this phenomenon often takes place in the industrial wastewater treatment plants with activated sludge process. The effects of nitrogen deficiency on activated sludge bulking were studied specially in some experiments carried out in a sequencing batch reactor fed with brewing process wastewater in this paper. The experimental results showed that the sludge settled properly at an influent BOD/N value of 100/4. When the value of BOD/N was 100/3, filaments had an excessive growth at one time during the reaction process. Afterwards, the number of filamentous bacteria began to reduce and simultaneously an excessive growth of viscous Zoogloea with high percentage of moisture was observed and non-filamentous activated sludge bulking occurred. When the influent BOD/N value was 100/2, the excessive growth of filamentous microorganisms could not be observed at all times and the sludge characterization was similar to the case in which BOD/N value was 100/3. When the value of influent BOD/N was 100/0.94, more serious non-filamentous bulking occurred. Furthermore, the effects of nitrogen deficiency on the nitrogen sources and phosphorus sources utilization rate and the COD removal rate were investigated in the experiments.
营养物质供应不足，如氮缺乏，通常会导致活性污泥膨胀，这种现象经常发生在采用活性污泥法的工业废水处理厂。本文通过在序批式反应器中对啤酒酿造废水进行实验，专门研究了氮缺乏对活性污泥膨胀的影响。实验结果表明，当进水BOD/N值为100/4时，污泥沉降正常。当BOD/N值为100/3时，反应过程中丝状菌一度过度生长。此后，丝状菌数量开始减少，同时观察到高含水率的粘性动胶菌过度生长，发生了非丝状菌活性污泥膨胀。当进水BOD/N值为100/2时，在整个过程中未观察到丝状微生物过度生长，污泥特性与BOD/N值为100/3时的情况相似。当进水BOD/N值为100/0.94时，发生了更严重的非丝状菌膨胀。此外，实验还研究了氮缺乏对氮源和磷源利用率以及COD去除率的影响。
