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Batch and continuous anaerobic tests were used to study the effect of cleaning additives on the methane production from brewery effluents. The detergents studied were based on fatty acids esters or on ethoxilated alcohols and presented EC 50 values in Vibrio fischeri of 4.3 and 14.1g/L respectively. However, these detergents were toxic to the granular sludge even at lower concentrations indicating...
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