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- W2367021222 abstract "A 4-compartment anaerobic baffled reactor (ABR),with a total effective volume of 28.75 L,was adapted for fermentative hydrogen production from diluted molasses. After inoculation with a mixture of aerobic and anaerobic activated sludge,the ABR started up with a hydraulic retention time (HRT) of 24 h,influent pH ranged from 5.3 to 6.8 at 35℃,while the influent COD concentration increased gradually from 500 to 6000 mg·L-1. After 63 days of operation,a microbial community capable of methane fermentation was obtained in the ABR and a steady state was achieved. During the steady stage,acetic acid and butyric acid dominated in the liquid fermentation products of the four compartments,indicating that butyric acid-type fermentation was established in the ABR. The ABR had an average COD removal of 37.6%,a hydrogen yield of 3.2 L·d-1,and a specific hydrogen production rate of 45.29 L·kg-1. With the increase of influent COD concentration,the performance characteristics of the ABR changed accordingly. When the ABR reached steady state again under an influent COD 8000 mg·L-1,though some methane was still produced in the last three compartments,typical ethanol-type fermentation formed in the first three compartments while butyric acid-type fermentation was strengthened in the last compartment. In the steady stage,the average COD removal decreased to 15.4%,while the hydrogen yield and specific hydrogen production rate by COD removal increased to 12.85 L·d-1 and 360.22 L·kg-1,respectively. Though the biogas yield and the specific biogas production rate of the activated sludge in the ABR reached 61.54 L·d-1 and 232 L·kg-1·d-1 respectively,in terms of mixed liquor volatile suspended solids (MLVSS),the hydrogen yield and the specific hydrogen production rate were only 12.85 L·d-1 and 48 L·kg-1·d-1 accordingly,resulting in hydrogen consumption by methanogenesis and homoacetogenesis." @default.
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- W2367021222 date "2010-01-01" @default.
- W2367021222 modified "2023-09-27" @default.
- W2367021222 title "Performance characteristics and hydrogen production efficiency of an anaerobic baffled reactor (ABR) used as a fermentation system" @default.
- W2367021222 hasPublicationYear "2010" @default.
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