Guo Wei, Wang Bo-guang, Tang Xiao-dong, Liu Shu-le, He Jie, Zhang Chun-lin
Department of Environment Engineering, Jinan University, Guangzhou 510632, China.
Huan Jing Ke Xue. 2013 May;34(5):2038-43.
The malodorous volatile organic compounds (MVOCs) from a typical municipal sewage treatment plant in Guangzhou were detected and analyzed using thermal-desorption/GC-MS and electronic nose, respectively. The results showed that: (1) Aromatic hydrocarbons were the main malodorous volatile organic compounds of the sewage treatment plant, with concentrations ranging from 96.61 microg x m(-3) to 818.03 microg x m(-3), accounting for more than 50% of the total MVOCs, much higher than other MVOCs species. (2) Volatile aromatic hydrocarbons (VAH) in municipal sewage treatment plant were mainly from domestic wastewater, and the sludge treatment process played an important part in release of these pollutants. The total concentration of aromatic hydrocarbons emitted from each processing unit in a descending order was: the sludge dehydration room > sludge thickener > aeration tank > grille > biochemical pool> grit chamber. (3) rincipal component analysis (PCA) was able to distinguish the characteristic of odor emission from each processing unit, with the recognition index reaching 71% , and the PCA recognition index of simulated gases which simulated the VAH levels of different processes reached 94% , indicating that there was big difference among the srmll of the VAH emitted from different processes. (4) The comparison of the original odor fingerprint and simulated odor fingerprint measured by the sensor T70/2 showed that the original odor fingerprint was greater than the simulated odor fingerprint, and the correlation analysis indicated that the VAH had a great contribution to the odor fingerprint of each unit, and the contribution of VAH odor of the aeration tank tq the original odor fingerprint reached 0. 98.
分别采用热脱附/气相色谱 - 质谱联用仪和电子鼻对广州某典型城市污水处理厂的恶臭挥发性有机化合物（MVOCs）进行了检测与分析。结果表明：（1）芳烃是污水处理厂主要的恶臭挥发性有机化合物，浓度范围为96.61μg·m⁻³至818.03μg·m⁻³，占总MVOCs的50%以上，远高于其他MVOCs种类。（2）城市污水处理厂中的挥发性芳烃（VAH）主要来源于生活污水，污泥处理过程在这些污染物的释放中起重要作用。各处理单元排放的芳烃总浓度由高到低依次为：污泥脱水间＞污泥浓缩池＞曝气池＞格栅＞生化池＞沉砂池。（3）主成分分析（PCA）能够区分各处理单元的气味排放特征，识别指数达到71%，模拟不同工艺VAH水平的模拟气体的PCA识别指数达到94%，表明不同工艺排放的VAH气味之间存在较大差异。（4）传感器T70/2测得的原始气味指纹图谱与模拟气味指纹图谱比较表明，原始气味指纹图谱大于模拟气味指纹图谱，相关性分析表明VAH对各单元的气味指纹贡献较大，曝气池VAH气味对原始气味指纹的贡献达到0.98。
