压力式接触氧化工艺微生物活性及耐盐性的研究

Study on the activity and salt resistance of microorganism of pressurized biological contact oxidation process

试验了压力式接触氧化工艺在中等盐度条件下的微生物活性及系统的耐盐性能。研究表明,当废水含盐质量浓度为10 g/L时,压力式接触氧化塔中微生物活性高于常规生物接触氧化法;在未驯化条件下当进水含盐质量浓度为20 g/L时,可取得84.4%的COD去除率。经驯化后当吡虫啉农药废水含盐质量分数为2.8%时,COD去除率达70.7%,保证了其对高盐度有机废水的处理效果。

The activity of microorganism under moderate salinity conditions and salt resistance in the pressurized biological contact oxidation process have been discussed. The study shows that the microorganism activity in the pressurized biological contact oxidation tower is higher than that in a conventional biological contact oxidation process when the salt mass concentration of wastewater is 10 g/L. Even when the biofilm is not domesticated and the salt mass concentration is as high as 20 g/L, the COD removal rate is about 84.4%. The COD removal rate could reach 70.7%, after a period of domestication when the salt mass fraction of imidacloprid wastewater is 2.8%, which ensures the effect of pressurized biological contact oxidation process on the treatment of organic wastewater with high salt concentration.