一体化厌氧反应器与间歇曝气人工湿地强化纺织废水处理

Jerome Michael Bidu
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摘要

在中试规模上研究了序贯厌氧-间歇好氧系统处理纺织废水的潜力。间歇曝气反应器由间歇曝气人工湿地与厌氧反应器串联而成。中试系统采用了纺织废水与生活废水的体积比(77:23)。厌氧反应器内处理温度控制在35 ± 2℃,初始pH在7.5 ~ 8.5范围内,这是由纺织废水和生活废水混合产生的。厌氧反应器、无曝气连续釜和间歇曝气连续釜的化学需氧量去除率最高,分别为65.0% %、87.6% %和90.4 %。中试系统经厌氧反应器处理后的最高脱色率为82.5 %,连续釜间歇曝气处理后的最高脱色率为86.5 %。另一方面,通过无曝气化粪池的废水的最高去色率为84.5 %。采用气相色谱-质谱分析了染料及其相应的生物降解副产物的生物降解情况。中试系统显示染料降解能力增强。厌氧处理后检测到的芳香胺在间歇曝气和不曝气的化化液中没有检测到。整个处理系统都在不断地去除碳氢化合物。中试系统对硝酸盐和氨的去除率为100% %。然而,磷酸盐的去除率很低。试验结果表明,该系统在去除色度、COD、芳香胺、氨和硝酸盐方面非常有效。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Integrated anaerobic reactor and intermittently aerated constructed wetland for enhanced textile wastewater treatment
The potential of the sequential anaerobic-intermittent aerobic system for treating real textile wastewater was investigated at a pilot scale. The intermittent aerated reactor consisted of an intermittently aerated constructed wetland (CW) connected in series with an anaerobic reactor. The volumetric ratio of textile to domestic wastewater (77:23) was used in the pilot system. The treatment temperature in the anaerobic reactor was controlled at 35 ± 2 °C, and the initial pH was in the range of 7.5–8.5, which resulted from mixing the textile and domestic wastewater. The highest chemical oxygen demand (COD) removal observed in the anaerobic reactor, nonaerated CW and intermittently aerated CW were 65.0 %, 87.6 % and 90.4 %, respectively. The highest decolourization rate achieved for the pilot system after the anaerobic reactor was 82.5 %, and after intermittent aeration in the CW was 86.5 %. On the other hand, the highest colour removal achieved for the wastewater that went through nonaerated CWs was 84.5 %. The biodegradation of dyes and their corresponding biodegradation byproducts was analysed via GC–MS. The pilot-scale system showed enhanced dye degradation. The aromatic amines detected after anaerobic treatment were not detected after intermittent aerated or nonaerated CWs. There was a continuous removal of hydrocarbons throughout the treatment system. 100 % removal efficacy of nitrates and ammonia was observed in the pilot system. However, phosphate removal was observed to be very low. The pilot system was found to be very effective in removing colour, COD, aromatic amines, ammonia, and nitrates.
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