Characterization of wastewater and solids odors using solid phase microextraction at a large wastewater treatment plant.

摘要: A simple and reliable technique has been developed used to detect odorous gases, i.e. propionic butyric acids, carbon disulfide, dimethyl sulfide, trimethylamine, emitted from various materials generated by the wastewater treatment process. The method detection limits are in low ppb range comparable odor threshold for human detection. In this study solid phase microextraction (SPME) was employed characterize quantify compounds headspace over samples collected unit processes at District of Columbia Wastewater Treatment Plant, Washington DC, USA. patterns chemicals released influent, thickened sludge, dewatered sludge biosolids were evaluated. Volatile reduced sulfurs more prevalent downstream corresponded with decreased oxidation-reduction potential (ORP) conditions. fatty acids consistently identified primary gravity thickeners, while trimethylamine could only be detected after post-liming