PCB工业园废水厌氧氨氧化小试研究

Study on Anaerobic Ammoxidation of Wastewater from Printed Circuit Board Industrial Park

本研究搭建了一套前置反硝化-亚硝化-厌氧氨氧化小试实验装置对PCB工业园废水进行了处理,实验结果表明,前置反硝化-亚硝化系统能够完成对PCB废水的除碳以及部分亚硝化处理,经过此套系统处理后的废水满足厌氧氨氧化进水要求。整套小试实验装置在面对变化较大的进水水质的情况下,依然取得了较好的处理效果,平均出水氨氮质量浓度仅为6.5 mg/L,平均出水总氮质量浓度为20.1 mg/L,平均出水COD值为74.7 mg/L。在厌氧氨氧化反应器内出现了耦合反硝化现象,经过厌氧氨氧化处理后的出水硝氮浓度低于亚硝化出水。根据实验结果,作者也提出了利用厌氧氨氧化工艺处理PCB工业园废水的工程实施建议。

In this study,a set of pre-denitrification-nitrosation-anaerobic ammoxidation pilot experimental device was built to treat the wastewater of PCB industrial park.The experimental results showed that the pre-denitrification-nitrosation system could complete the carbon removal and partial nitrosation treatment of PCB wastewater,and the wastewater treated by this system could meet the influent requirements of anaerobic ammoxidation.The whole set of experimental devices still achieved good treatment results in the face of large changes in influent water quality.The average effluent ammonia nitrogen was only 6.5 mg/L,the average effluent total nitrogen 20.1 mg/L,and the average effluent COD74.7 mg/L.The coupled denitrification phenomenon appeared in the anaerobic ammox reactor,and the nitrate and nitrogen concentration of the effluent after anaerobic ammoX treatment was lower than that of the nitrosation effluent.According to the experimental results,the author also put forward the project implementation proposal of using anaerobic ammonia oxidation process to treat PCB industrial park wastewater.