摘要
针对油脂废水恶臭问题,采用外加硝酸盐氮的反硝化法降解油脂废水中恶臭物质,并研究了处理前后挥发性有机物质的变化情况及其机理分析。结果表明:在缺氧条件下,反硝化菌可利用NO_3^--N作为电子受体,油脂废水中具有恶臭的挥发性有机物质作为电子供体,实现油脂废水恶臭的去除;恶臭物质的去除与NO_3^--N的投加量有关,当C/N≤5.2时,出水几乎无味,VOC的逸散量较处理前降低99.5%以上,最佳C/N为5.2,出水几乎没有NO_3^--N残留,避免了二次污染;采用"顶空固相微萃取-气质联用仪"技术对油脂废水处理前后VOC进行分析,处理前水样检测出46种主要挥发性有机物,处理后为9种。因此,利用反硝化去除油脂废水中恶臭物质是非常有效的措施。
In the current study,denitrification was used to remove the malodorous gas from oil wastewater,under the detection of change of the volatile organic compounds（ VOC） and the mechanism. The results showed that the malodorous gas was removed from the oil wastewater by the denitrifying bacterium,with NO_3^--N as the electron acceptor and the volatile organic compounds as the electron donors. The removal efficiency was related to the dosage of nitrate nitrogen. When the value of C / N was less than or equal to 5. 2,the emission of the VOC from the treated water decreased by more than 99. 5%. When the C / N value was equal to 5. 2,no NO_3--N remained in the wastewater. Before treatment,46 main volatile organic compounds could be detected by SPMEGC / MS. However,only nine compounds remained after the treatment. Therefore,the denitrification process is an effective measure or strategy to remove malodorous gas from oil wastewater.
作者
许青青
何成达
余梦宇
王丹
高洁
XU Qingqing HE Chengda YU Mengyu WANG Dan GAO Jie(School of the Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2017年第2期867-871,共5页
Chinese Journal of Environmental Engineering
