Abstract:

The sludge was treated by micro-nano bubbles combined with ozone oxidation technology. The effects of different factors on sludge reduction were investigated. The results show that under the condition of O₃ concentration 30 mg/L, the treatment temperature 20℃, and the treatment time 55 min, the sludge reduction rate after micro-nano bubble and ordinary bubble treatment is about 15.0% and 5.3%, while the SVI, CST, MLVSS/MLSS and pH are reduced to 109 mL/g and 115.5 mL/g, 18.1 s and 20.3 s, 0.55 and 0.6, 6.18 and 6.52, respectively. Increasing the ozone concentration to some extent or reducing the initial concentration of sludge helps to increase the reduction effect.

Key words: micro-nano bubbles, ozone, sludge reduction, hydroxyl radicals

摘要：

利用微纳米气泡结合臭氧氧化技术处理污泥，考察不同因素对污泥减量化效果的影响。结果表明：在O₃质量浓度为30 mg/L，20℃，处理55 min后，微纳米气泡和普通气泡处理后污泥减量率分别为15.0%、5.3%左右，SVI降至109、115.5 mL/g，CST降至18.1、20.3 s，MLVSS/MLSS降低至0.55、0.60，pH降低至6.18、6.52。一定程度上提高臭氧浓度或降低污泥初始浓度有助于提升减量效果。

关键词: 微纳米气泡, 臭氧, 污泥减量化, 羟基自由基

CLC Number: 

• X703