麦饭石固定化SRB污泥颗粒处理模拟煤矿酸性废水的适应性

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—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0.085 m3·（m2·d）-1，水力停留时间32.495 h下运行效果较好，SO42-和Mn2+去除率分别为65.90%和37.65%，出水COD浓度635.06 mg·L-1，总铁元素TFe释放量4.03 mg·L-1，出水pH 6.94。提高污染物SO42-和Mn2+浓度到（2 657±96）mg·L-1和（13.33±1.75）mg·L-1，SO42-和Mn2+去除率仍可达40.07%和20.52%，出水COD浓度64.07 mg·L-1，总铁元素TFe释放量2.69 mg·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。

Adaptability study on sludge particles of maifan stone immobilized SRB processing simulation acid coal mine drainage

Aimed at studying the characteristics of heavy pollution and the high management cost of multicomponent 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 better under low hydraulic loading of 0.085 m3·(m2·d)-1 and a hydraulic retention time of 32.495 h.The removal rates of SO2- 4and 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 SO42- and Mn2+ to (2 657±96)mg·L-1 and (13.33±1.75)mg·L-1, respectively, both SO42- 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.