MBR工艺对高硝酸盐己二酸废水脱氮效果的试验

文中采用膜生物反应器(MBR)工艺处理某化工污水处理厂高硝酸盐己二酸废水,研究反应器脱氮效果和影响因素。试验结果显示:在进水NO_(3)^(-)-N质量浓度为800~1200 mg/L,NO_(2)^(-)-N质量浓度为60~150 mg/L时,出水中两者质量浓度均<1 mg/L,表明MBR工艺具有良好的反硝化性能以及较强的抗冲击能力;C/N、反应器温度、pH是影响反硝化细菌正常生长的重要因素,当进水C/N<4,反应器内部平均温度<19℃时,NO_(3)^(-)-N平均去除率仅70%,而pH值在8.0~8.5能保证高脱氮负荷;高通量测序结果显示,反应器运行至第79 d时,副球菌属(Paracoccus)(16.35%)和热单胞菌属(Thermomonas)(9.75%)等反硝化细菌富集,为高效脱氮提供了保障。总体结果表明,MBR工艺对高硝酸盐浓度的己二酸废水具有较好处理效果,但应当注意反应条件的控制,以达到好的脱氮效果。

Study on the catalyst in the decomposition reaction for BI organic waste water to adipic acid

The influences of kinds and level of catalyst, time of decomposition reaction on the distribution of dibasic acid and apparent yield of adipic acid were researched; the acidic washing waste water （BI waste water） producing from the equipment of cyclohexane oxidation by air was as stuff, the component of products by decomposed and oxidated in different conditions were analysed. It indicated that in the presence of cobalt salt the apparent yield of adipic acid was upto 10%-12% for the total BI waste water after the concentrated BI waste water refluxed for two hours, and then oxidated by nitric acid.