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A thermophilic (55 o C) lab-scale (0.92l) methanol-fed upflow anaerobic sludge bed (UASB) reactor (pH 7.0 and hydraulic retention time (HRT) of 7.5h) was operated at chemical oxygen demand (COD) to sulfate (SO 42- ) ratios of 10, 5 and 0.5 during 155 days to evaluate the effects of the presence of sulfate on conversion rates, metabolic shifts and possible process disturbances...
The effect of NaCl on thermophilic (55 o C) methanol conversion in the presence of excess of sulfate (COD/SO 42- =0.5) was investigated in two 6.5L lab-scale upflow anaerobic sludge bed reactors inoculated with granular sludge previously not adapted to NaCl. Methanol was almost completely used for sulfate reduction in the absence of NaCl when operating at an organic loading...
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