活性翠蓝生物降解性能的试验研究

Biodegradation of Reactive Turquoise Blue

通过试验比较了厌氧、好氧条件下活性污泥对活性翠蓝的生物降解机理、降解能力及受葡萄糖浓度影响的情况 .结果表明厌氧菌不能单独降解活性翠蓝 ,只能通过共代谢作用降解活性翠蓝 ;而好氧菌既可以单独降解活性翠蓝 (以活性翠蓝为唯一碳源时 ,2 0mg/L活性翠蓝的 2 4h好氧降解率为 3 7 4 % ) ,也可以通过共代谢作用降解活性翠蓝 .葡萄糖浓度的升高对提高活性翠蓝的厌氧、好氧生物降解率均有利 ,当葡萄糖浓度为 1 2 0 0mg/L时 ,2 0mg/L活性翠蓝的 2 4h厌氧、好氧降解率分别达到 81 5%、73 6% .活性翠蓝浓度对厌氧菌、好氧菌的生物降解能力也有影响 .当葡萄糖浓度分别为 80 0mg/L、1 2 0 0mg/L ,活性翠蓝 (浓度为 2 0～ 1 0 0mg/L)的厌氧降解率比好氧降解率高 4 9%～ 2 7 2 % 。

In this study, the anaerobic degradation and the aerobic degradation of a kind of reactive dye——Reactive Turquoise Blue(RTB) were compared. The results proved that anaerobic sludge could only decompose RTB in the presence of glucose while aerobic sludge decomposed RTB with or without the presence of glucose (RTB of 20mg/L was reduced by 37 4% through 24 hours' aerobic treatment with RTB as sole carbon source). The enhancement of glucose concentration was beneficial for both anaerobic and aerobic degradation of RTB: the anaerobic and the aerobic removal efficiencies were respectively 81 5% and 73 6% with RTB of 20mg/L and glucose of 1200 mg/L. In the influent RTB concentration also had influence on the activity of anaerobic and aerobic microorganisms. When glucose concentration was 800mg/L or 1200mg/L and RTB concentration was 20mg/L to 100 mg/L, anaerobic removal efficiency of RTB was higher than aerobic removal efficiency by 4 9%～27 2%, which meant that anaerobic bacteria is more powerful than aerobic bacteria in terms of RTB removal.