Emissions of reduced sulphur compounds from the surface of primary and secondary wastewater clarifiers at a Kraft Mill
- 23 July 2008
- journal article
- research article
- Published by Springer Science and Business Media LLC in Environmental Monitoring and Assessment
- Vol. 156 (1-4), 37-49
- https://doi.org/10.1007/s10661-008-0461-9
Abstract
Emissions of reduced sulphur compounds (RSCs) from the primary and secondary clarifiers at a Kraft mill were measured for respectively 8 and 22 days using a floating flux chamber. In the primary clarifier, dimethyl disulphide (DMDS) had the highest mean flux (0.83 μg s − 1 m − 2) among all RSCs, and the mean flux of total reduced sulphur (TRS) was 1.53 μg s − 1 m − 2. At the secondary clarifier, dimethyl sulphide (DMS) had the highest mean flux (0.024 μg s − 1 m − 2), and the mean flux of total reduced sulphur (TRS) was 0.025 μg s − 1 m − 2. Large variations in fluxes as a function of sampling date were observed in both clarifiers. Emission fluxes of DMS from the secondary clarifier were correlated with temperature in the flux chamber and with the biological and chemical oxygen demands (BOD and COD) of the wastewater. Emission rates of RSCs from the clarifiers were found to be insignificant by comparison with other mill sources.Keywords
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