反硝化法降解油脂废水中的恶臭物质
Degradation of malodorous gas from oil waste-water by denitrification
-
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NO3--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NO3--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NO3--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。Abstract: 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 NO3--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 NO3--N remained in the wastewater. Before treatment, 46 main volatile organic compounds could be detected by SPME-GC/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.
-
Key words:
- oil waste-water /
- denitrification /
- malodorous gas /
- SPME /
- GC-MS
-
-
[1] APARICIO R, ROCHA S M, DELGADILLO I, et al. Detection of rancid defect in virgin olive oil by the electronic nose[J]. Journal of Agricultural and Food Chemistry, 2000, 48(3):853-860 [2] 刘精今, 陈竹新, 杨麒. 我国植物油脂废水常规生物处理技术研究进展[J]. 中国油脂, 2004, 29(3):66-69 [3] 李立春, 郑先强, 冯丽霞, 等. 气浮/MBR/Fenton组合工艺处理粮油加工废水[J]. 中国给水排水, 2013, 29(10):60-62 [4] 王淑莹, 孙洪伟, 杨庆, 等. 传统生物脱氮反硝化过程的生化机理及动力学[J]. 应用与环境生物学报, 2008, 14(5):732-736 [5] 杜蕴慧, 刘勇弟. 利用反硝化过程处理有机废水[J]. 环境导报, 1997(3):16-20 [6] 申海虹, 顾国维, 李咏梅. 缺氧反硝化去除难降解杂环化合物吡啶研究[J]. 上海环境科学, 2001, 20(11):530-533 [7] 李本玉, 顾国维, 李咏梅. 利用缺氧反硝化去除苯的试验研究[J]. 给水排水, 2005, 31(3):51-54 [8] HONDA Y, OSAWA Z. Microbial denitrification of wastewater using biodegradable polycaprolactone[J]. Polymer Degradation and Stability, 2002, 76(2):321-327 [9] 张欢, 包景岭, 王元刚. 恶臭污染评价分级方法[J]. 城市环境与城市生态, 2011, 24(3):37-38 [10] 赖永忠. 固相微萃取法同时分析源水中54种挥发性有机物[J]. 中国给水排水, 2012, 28(8):94-98 [11] 国家环境保护总局. 水和废水监测分析方法.4版[M]. 北京:中国环境科学出版社, 2002:258-282 [12] 张自杰. 排水工程.4版[M]. 北京:中国建筑工业出版社, 2000:309-310 [13] SHARMA B, AHLERT R C. Nitrification and nitrogen removal[J]. Water Research, 1977, 11(10):897-925 [14] LI Huiqiang, HAN Hongjun, DU Mao'an. Effect of nitrate concentration on performance of pre-denitrification moving bed biofilm reactor system in treating coal gasification wastewater[J]. Desalination and Water Treatment, 2013, 51(31/33):5996-6002 [15] BIANCHI A P, VARNEY M S. Volatilisation processes in waste water treatment plants as a source of potential exposure to VOCs[J]. The Annals of Occupational Hygiene, 1997, 41(4):437-454 -
点击查看大图
计量
- 文章访问数: 1685
- HTML全文浏览数: 1378
- PDF下载数: 400
- 施引文献: 0
下载:
