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- W2040798506 abstract "A propionate-utilizing sludge was enriched in a chemostat reactor for over 90 days. Its methanogenic degradation characteristics were investigated in batch reactors using various substrates. The suspended-growth sludge degraded propionate at 0.65 mg-COD (mg-VSS d)−1, which is comparable to the rate reported in the literature for the granular sludge in a UASB reactor. The propionate-degrading rate was not affected by the presence of butyrate as a co-substrate initially; but it was lowered substantially as propionate concentration became below 100 mg l−1. The sludge was also able to degrade butyrate at 0.52 mg-COD (mg-VSS d)−1, which is about 30% of the rate reported for granular sludge in a UASB reactor treating butyrate as the sole substrate. The butyrate-degrading rate was lowered when propionate was present at high concentrations. In the interim of butyrate degradation, several higher-molecular weight acids were detected in the mixed liquor, including i-butyrate, i-valerate and caproate; valerate was, however, detected only in the batch when the PH2 was as high as 10−1.8 atm. The presence of formate lowered the degrading rates of both propionate and butyrate." @default.
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- W2040798506 date "1999-10-01" @default.
- W2040798506 modified "2023-09-27" @default.
- W2040798506 title "Substrate Degradation of Propionate-Utilizing Sludge" @default.
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- W2040798506 doi "https://doi.org/10.1080/09593332008616907" @default.
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