Abstract
The relative effectiveness of 8-hydroxyquinoline sulfate and alkyl dimethyl benzyl ammonium chloride (a quaternary ammonium compound) were compared for their ability to prevent growth of microorganisms in aerospace food waste. Alkyl dimethyl benzyl ammonium chloride and 8-hydroxyquinoline sulfate were added to samples of banana pudding, chicken salad, cocoa, orange drink, and non-fat milk at concentrations ranging from 0.1 to 4%. The rehydrated foods containing the microstatic agents were incubated at 23 C for 60 days.Microbiological analyses were performed on aliquots which were withdrawn at various intervals. Aliquots were analyzed for total aerobic count, coliforms, yeasts, and molds. No growth was observed in samples containing 8-hydroxyquinoline sulfate in concentrations >1% and stored at 23 C. Coliforms, yeasts, and molds were not detected in the initial food or during the storage period. Research toward a food waste stabilization system which would prevent growth by decreasing the water activity is recommended.
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