超声波-生物接触氧化联用降解邻硝基氯苯

Treatment of O-Chlorobenzene by Ultrasonication and BIocontact Oxidation-reactor

采用超声波-生物接触氧化法降解土壤及地下水中的邻硝基氯苯,探讨了土壤的p H值,超声波辐射功率和频率,以及生物接触氧化的不同曝气量下对土壤和地下水中的邻硝基氯苯降解率的影响,考查最优工艺参数。结果表明,超声波预处理时,超声波辐射功率在1 500 W,频率在120 k Hz时,地下水降解率可达到71.5%;超声波-生物接触氧化法联合处理时,曝气量为60 L/(m^3·min),地下水降解率最终可达到92%;超声波预处理有助于提高后续生物接触氧化法对邻硝基氯苯的降解作用。

The combined processes of ultrasonication and bio-contact oxidation-reactor is applied in O-Chloronitrobenzene degradation of soil and groundwater.This combined processes investigate p H value of soil,power and frequency of ultrasonication, as well as under different aeration in bio-contact oxidation-reactor influence on degradation rate of O-Chlorobenzene in soil and ground water.The results showed that,(1)soil degradation rate can reach 71.5% by ultrasonication at 1 500 W power and 120 k Hz frequency;(2)in the combined processes of ultrasonication and bio-contact oxidation-reactor, at aeration 60L/(m^3·min), final groundwater degradation rate can reach 92%;(3)the ultrasonication pretreatment can significantly enhance treatment effect of O-Chlorobenzene by bio-contact oxidation-reactor.