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Biohydrogen production from sewage sludge using a continuous hydrogen fermentation system with a heat treatment vessel
Abstract An anaerobic hydrogen fermentation system with a thermophilic flow-through reactor (55°C) for hydrogen production and a boiling retention vessel (100°C) for continuous heat treatment, was studied for enhanced continuous hydrogen fermentation using sewage sludge. The performance of the hydrogen fermentation system was tested at various Hydraulic Retention Times (HRTs) ranged from 1 to 5 days. The heat treatment of the fermenting sludge using the boiling retention vessel was an effective to select hydrogen producing bacteria, and to increase the hydrolysis of particulate organics in sewage sludge. The VS reduction from the hydrogen fermentation system with the boiling retention vessel was increased from 22.2% to 37.9% according to the HRT ranged from 1 to 5days, caused by the heat treatment of the fermenting sludge. However, higher maximum yield of hydrogen compared to previous studies was 3.07 mmol H2/g TS, which was obtained at 3 days HRT. The hydrogen yield and hydrolysis rate were significantly affected by pH condition, and proper pH for the hydrogen fermentation was from 5.5 to 6.5. The hydrogen production was limited by the hydrolysis for 1day HRT and by the hydrogen consumption activity for 5days HRT.
Biohydrogen production from sewage sludge using a continuous hydrogen fermentation system with a heat treatment vessel
Abstract An anaerobic hydrogen fermentation system with a thermophilic flow-through reactor (55°C) for hydrogen production and a boiling retention vessel (100°C) for continuous heat treatment, was studied for enhanced continuous hydrogen fermentation using sewage sludge. The performance of the hydrogen fermentation system was tested at various Hydraulic Retention Times (HRTs) ranged from 1 to 5 days. The heat treatment of the fermenting sludge using the boiling retention vessel was an effective to select hydrogen producing bacteria, and to increase the hydrolysis of particulate organics in sewage sludge. The VS reduction from the hydrogen fermentation system with the boiling retention vessel was increased from 22.2% to 37.9% according to the HRT ranged from 1 to 5days, caused by the heat treatment of the fermenting sludge. However, higher maximum yield of hydrogen compared to previous studies was 3.07 mmol H2/g TS, which was obtained at 3 days HRT. The hydrogen yield and hydrolysis rate were significantly affected by pH condition, and proper pH for the hydrogen fermentation was from 5.5 to 6.5. The hydrogen production was limited by the hydrolysis for 1day HRT and by the hydrogen consumption activity for 5days HRT.
Biohydrogen production from sewage sludge using a continuous hydrogen fermentation system with a heat treatment vessel
Woo, Jung-Hui (author) / Song, Young-Chae (author)
KSCE Journal of Civil Engineering ; 14 ; 673-679
2010-07-17
7 pages
Article (Journal)
Electronic Resource
English
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