Sulphate was reduced via sulphide to sulphur when operating a single-stage completely mixed reactor configuration feeding synthetic feed. The aim of this study was to determine the volumetric and specific sulphate reduction rates using sugar, ethanol and methanol as a carbon and energy sources. The presented results indicated that sugar and ethanol were found to be suitable carbon and energy sources resulting in a volumetric and a specific sulphate reduction rate of 10.4 and 4.8 g SO4/(l.d) and 0.8 and 2.8 g SO4/(gVSS.d), respectively, at a Hydraulic Retention Time (HRT) of 3.6 h and at ambient temperature (21°C). Methanol induced methanogenesis rather than sulphidogenesis. The experimental sulphide/sulphate ratio was consistently lower than the theoretical value which indicated that part of the formed sulphide was oxidized to sulphur.
Comparison between sucrose, ethanol and methanol as carbon and energy sources for biological sulphate reduction
H. A. Greben, J. P. Maree, S. Mnqanqeni; Comparison between sucrose, ethanol and methanol as carbon and energy sources for biological sulphate reduction. Water Sci Technol 1 June 2000; 41 (12): 247–253. doi: https://doi.org/10.2166/wst.2000.0279
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