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  • Title: Inhibition of volatile fatty acid production in granular sludge from a UASB reactor.
    Author: Dogan T, Ince O, Oz NA, Ince BK.
    Journal: J Environ Sci Health A Tox Hazard Subst Environ Eng; 2005; 40(3):633-44. PubMed ID: 15756974.
    Abstract:
    Inhibition of volatile fatty acids (VFA), namely acetate, butyrate, and propionate, on the activity of acetoclastic methanogens within a full-scale upflow anaerobic sludge blanket (UASB) reactor was investigated using specific methanogenic activity (SMA) test. SMA tests were carried out at acetate concentrations in a range of 1000-25,000 mg l(-1), butyrate concentrations in a range of 3000-25,000 mg l(-1) and propionate concentrations between 500-10,000 mg l(-1). Maximum potential methane production (PMP) rates were obtained as 389 ml CH4 gTVS(-1) x d(-1) at 3000 mg l(-1) acetate concentration, 432 ml CH4 gTVS(-1) x d(-1) at butyrate concentration of 5000 mg l(-1), and 162 mlCH4 gTVS(1) x d(-1) at 1000 mg l(-1) propionate concentration. App. 50% and 100% inhibition occurred at acetate concentrations of 13,000 mg l(-1) and 25,000 mg l(-1), butyrate concentrations of 15,000 mg l(-1) and 25,000 mg l(-1), and propionate concentrations of 3500 mg l-1) and 5000 mg l(-1), respectively.
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