微污染水源水处理中超声波强化生物降解有机污染物研究

通过设置超声波的膜生物反应器与对照反应器净化微污染水源水的对比试验,研究了超声波对水源水生物净化的强化作用.结果表明,通过一定强度的超声波处理,膜生物反应器的生物活性得到增强,反应器有机负荷增加,有机物净化效率提高.通过设置超声波的反应器及其对照的TTC脱氢酶生物活性、进出水的有机物分子量分布的对比试验进一步证明了超声波处理促进了生物活性.通过不同功率的超声波处理表明,功率为10W的超声波促进生物作用的效果最为明显.经超声波处理后效果能保持24h,可设置超声波处理的时间间隔为24h.本文还分析了超声波促进生物活性的机理.

Organic Pollutants Biodegradation in Micro-polluted Water Enhanced by Ultrasonic

The effect of ultrasonic on the biotreatment of micro-polluted source water in a membrane bioreactor was studied through contrast experiments between the membrane bioreactor with and without ultrasonic. The results showed that ultrasonic at proper intensity could improve biological activity, increase organic load of the bioreactor, and enhance the removal of organic matters. The study of TTC-DHA of the bacteria and apparent molecular size distribution (AMSD) of organic compounds in the influent and effluent in the contrast experiments further proved that ultrasonic enhanced the bioactivity of the membrane bioreactor. The experiments with ultrasonic at different powers showed that ultrasonic at 10W enhanced bioactivity most effectively. The effect of ultrasonic changed with running time. It was found that ultrasonic effect could be maintained for 24 hours, so the interval of ultrasonic treatment could be set at 24 hours. The mechanism of biological activity enhancement by ultrasonic was also investigated.