针对多组分煤矿酸性废水(ACMD)污染严重、治理费用高的特点,采用PVA一硼酸包埋交联法制作以硫酸盐还原菌(SRB)和盐改性麦饭石为主体的固定化颗粒,依据不同水力负荷和污染负荷构造3组动态柱,对固定化颗粒进行水力条件适应性实验研究。结果表明,固定化颗粒在低水力负荷0.085m^3·(m^2·d)^-1,水力停留时间32.495h下运行效果较好,SO4^2-和Mn^2+去除率分别为65,90%和37.65%,出水COD浓度635.06mg·L^-1,总铁元素TFe释放量4.03mg·L^-1,出水pH6.94。提高污染物OS4^2-和Mn^2+浓度到(2657±96)mg·L^1和(13.33±1.75)mg·L^-1,SO4^2-和Mn^2+去除率仍可达40.07%和20.52%,出水COD浓度64.07mg·L^-1,总铁元素TFe释放量2.69mg·L^-1,出水pH为7.38,综合处理效果较好,颗粒对高浓度污染物适应性较强,具有一定抗冲击负荷能力。
Aimed at studying the characteristics of heavy pollution and the high management cost of multicom- ponent acid coal mine drainage, the PVA-boric acid embedding cross-linking method was used to immobilize particles using sulfate reducing bacteria (SRB) and salt modified maifan stone. According to different hydraulic loading and pollution loading configure 3 groups dynamic column to undertake study on hydraulic conditions adaptability of immobilized particles. The results showed that the operation effect of immobilized particles was bet- ter under low hydraulic loading of O. 085 m3 · (m2 · d) -1 and a hydraulic retention time of 32. 495 h. The re- moval rates of SO/4-and Mn2+ were 65.90% and 37.65%, respectively, while the effluent COD concentration was 635.06 mg· L-1, and TFe release amount was 4.03 mg · L-1 , and the effluent pH was 6.94. After raising the concentration of the pollutants SO4^2- and Mn2+ to (2 657 ±96)mg · L^-1 and (13.33± 1.75)mg · L^-1, respectively, both SO4^2- and Mn2+ could still achieve removal rates of 40.07% and 20.52% , respectively, while the effluent COD concentration was 64.07 mg · L^-1 and TFe release amount was 2.69 mg · L^-1 ;the effluent pH was 7.38. The immobilized particles had a better comprehensive processing effect, stronger adaptability to high concentrations of pollutants, and were better capable of resisting impact loads.