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Comparison of dye wastewater treatment by normal and anoxic plus anaerobic/aerobic SBR activated sludge processes

机译:常规和缺氧加厌氧/好氧SBR活性污泥法处理染料废水的比较

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In this research, the effects of different color intensities, anoxic+anaerobic times and types of substrate on color removal effectiveness were studied using 16-litre bench scale sequencing batch reactor (SBR) anoxic+anaerobic/aerobic models. The systems were fed with a synthetic wastewater containing 500 mg/l of COD, 50 mg/l of N, 15 mg/l of P along with 10, 40 and 80 mg/l of reactive diazo Remazol Black B dye. The anoxic+anaerobic/aerobic periods were 0/11 (normal aerobic SBR), 2/9, 4/7 and 8/3 hours, respectively. The color removal occurred mainly under the anaerobic environment, while a slight attenuation was noticed under the aerobic condition. A better decolorization could be achieved with a longer anoxic+anaerobic period. The sodium acetate was a slightly better co-substrate for the color removal than glucose. The decolorization efficiency dwindled as the fed dye concentration increased, but the overall color removal leaned in the opposite direction. The phosphorus removal of the anoxic+anaerobic/aerobic systems was outstanding, whereas only 50% removal was achieved for the aerobic process. A dye concentration of up to 80 mg/l did not have any significant impact on the performance of the polyphosphate accumulating organisms (PAOs). The removal of organic carbon and TKN was comparable among all experiments regardless of system configurations, color intensities and types of substrate. [References: 27]
机译:在这项研究中,使用16升台式规模测序分批反应器(SBR)缺氧+厌氧/好氧模型研究了不同颜色强度,缺氧+厌氧时间和底物类型对颜色去除效果的影响。向系统中注入含有500 mg / l的COD,50 mg / l的N,15 mg / l的P以及10、40和80 mg / l的反应性重氮Remazol Black B染料的合成废水。缺氧+厌氧/好氧时间分别为0/11(正常需氧SBR),2 / 9、4 / 7和8/3小时。除色主要在厌氧环境下发生,而在有氧条件下则观察到轻微的衰减。更长的缺氧+厌氧时间可以实现更好的脱色。乙酸钠是用于颜色去除的比葡萄糖更好的共底物。随着进料染料浓度的增加,脱色效率降低,但是总的脱色倾向相反。缺氧+厌氧/好氧系统的除磷效果非常好,而好氧工艺的除磷率仅为50%。高达80 mg / l的染料浓度对聚磷酸盐累积生物(PAO)的性能没有任何显着影响。在所有实验中,无论系统配置,颜色强度和底物类型如何,有机碳和TKN的去除率均相当。 [参考:27]

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