采用膜生物反应器处理丁基黄药废水

摘要

为了寻找经济适用、无二次污染的选矿药剂废水的处理方法,利用膜生物反应器(MBR)技术对较高浓度的丁基黄药模拟废水(简称黄药废水)进行处理研究,分别考察外加C源投加量、水力停留时间、反应温度对MBR去除黄药和COD效果的影响,并探索黄药的生物降解途径.结果表明,最佳的试验条件为外加C源无水乙酸钠的投加质量浓度为0.5 g/L、水力停留时间24 h、反应温度30℃.MBR运行至稳定状态后,出水COD和黄药的去除率分别大于94.0％和99.7％,出水COD的平均质量浓度为91.89 mg/L;出水的黄药质量浓度介于1.048～2.101mg/L之间,达到较好的处理效果.研究结果为浮选药剂废水的生物净化处理提供了理论依据.%As a utility and high efficient wastewater treatment technology,membrane bioreactor (MBR) was applied to deal with high concentrations of simulated butyl xanthate wastewater for the first time.The effects of carbon source dosage,hydraulic retention time (HRT) and temperature on the biodegradation of butyl xanthate were investigated.And the mechanism of xanthate biodegradation by MBR was then conjectured based on hydrolysis character and oxidation feature of xanthate combined with experimental data.The results show that the optimum operating conditions are 0.5 g/L anhydrous sodium acetate as additional carbon source,HRT of 24 h,reaction temperature of 30 ℃,respectively.During steady-state phase of high volumetric load,the average effluent concentration of COD and butyl xanthenes concentration are 91.89 mg/L and 1.048-2.101 mg/L.The removal rate of COD and substrate butyl xanthate maintain at 94.0％ and 99.7％ respectively.The experiment provides the theoretical basis and prognosticates a good outlook of the MBR application on biodegradation of mine flotation wastewater.