Occurrence and control of odorous compounds in treated wastewater and in the environment

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420536
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Civil and environmental engineering
• Research Institution: Tokyo University of Technology
• Principal Investigator: URASE Taro 東京工科大学, 応用生物学部, 教授 (60272366)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 臭気物質 / かび臭 / 下水処理水 / トリクロロアニソール / におい嗅ぎガスクロマトグラフ

Outline of Final Research Achievements

Earthy and musty odor, in addition to the odor caused by sulfur-containing compounds, is one of the barriers for the reclamation of treated wastewater. The quantification of odorous compounds and the analysis by a gas chromatograph with olfactometry detection in this study showed that not only geosmin and 2-methylisoborneol but 2,4,6-trichloroanisole contributed to earthy and musty odor of treated wastewater. Higher concentrations of earthy and musty odor compounds were observed for treated wastewater from large-scale wastewater plants in an urbanized area with closed-roof activated sludge reactors, while lower concentrations were detected for small-scale and community-scale plants in rural areas. The sulfur and skatole odor was dominant for the small-scale plants. Ozonation applied for the reclamation of treated wastewater was partially effective for the elimination of the odorous compounds, while activated carbon treatment was effective for the removal of earthy and musty odor.

Free Research Field

環境衛生工学