低温下ABR对含硝基苯废水冲击的适应性研究

在低温条件下采用厌氧折流板反应器(ABR)对污水进行酸化预处理,当系统受到含硝基苯废水的冲击时,微生物INT脱氢酶活性(INT-DHA)和出水COD变化可以表征系统的恢复进程。试验结果表明:在水温为5~10℃、水力停留时间(HRT)为3 h条件下,连续3 d同时向单侧和分区进水ABR中投加含硝基苯(0.48 mg/L)的污水,表现为酸化菌INT-DHA以及反应器COD去除率同步下降。历经3周后,两反应器的性能基本恢复正常。表明低温条件下,硝基苯对酸化菌活性以及系统的性能产生不利影响,ABR反应器具有一定的抗短期硝基苯冲击能力,分区进水ABR的性能更优。

Research on the Adaptability of Split Feed ABR to Nitrobenzene Wastewater under Low Temperature

Split Feed Anaerobic Baffled Reactors(SFABRs) were used to pre-treat wastewater under the batch loading of nitrobenzene wastewater at low temperature and the performance of the system was indicated with microorganism INT-DHA and effluent COD.The experiment results showed that when batch loading 0.48 mg/L of nitrobenzene wastewater on the SFABRs with the rate of one time per day and keeping three days continuously,the systems performance was impacted negatively,while three weeks later,the systems recovered to the normal degree,which showed that ABR,especially SFABR,highly adapted to nitrobenzene wastewater.