Barbosa Vera, Hobbs Phil, Sneath Robert, Burgess Joanna, Callan Joanne, Stuetz Richard
School of Water Sciences, Cranfield University, Bedfordshire, United Kingdom.
Water Environ Res. 2006 Aug;78(8):842-51. doi: 10.2175/106143005x72876.
The effects of hydrogen sulfide (H2S) diffusion into activated sludge (AS) on odor and volatile organic compound (VOC) concentrations in offgas were studied over an 8-week period. Most VOCs detected in the offgas of both aeration tanks were aromatic hydrocarbons. The VOC concentrations generally decreased when H2S was introduced to the AS compared with the control, indicating a negative effect of H2S on VOC removal. Two volatile organic sulfur compounds present in the test AS offgas showed an increase followed by a decrease during H2S peak loads. Six VOCs and odor concentration increased during the introduction of an H2S peak; however no correlation was observed between H2S and odor concentration. The increase in odor concentration resulted from the increase in the concentration of six aromatic VOCs, which had their removal slowed down during a 100-ppmv H2S peak. Activated sludge diffusion provides effective H2S removal with minimal affect on odor emissions.
在为期8周的时间里，研究了硫化氢（H₂S）扩散到活性污泥（AS）中对废气中气味和挥发性有机化合物（VOC）浓度的影响。两个曝气池中废气检测到的大多数VOC都是芳烃。与对照相比，当向活性污泥中引入H₂S时，VOC浓度通常会降低，这表明H₂S对VOC去除有负面影响。测试的活性污泥废气中存在的两种挥发性有机硫化合物在H₂S峰值负荷期间先增加后减少。在引入H₂S峰值期间，六种VOC和气味浓度增加；然而，未观察到H₂S与气味浓度之间的相关性。气味浓度的增加是由于六种芳烃VOC浓度的增加，在100 ppmv的H₂S峰值期间，它们的去除速度减慢。活性污泥扩散能有效去除H₂S，对气味排放的影响最小。
