H2 production with anaerobic sludge using activated-carbon supported packed-bed bioreactors |
| |
Authors: | Lee Kuo-Shing Lo Yung-Sheng Lo Yung-Chung Lin Ping-Jei Chang Jo-Shu |
| |
Affiliation: | (1) Department of Chemical Engineering, Feng Chia University, Taichung, Taiwan;(2) Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan |
| |
Abstract: | Packed-bed bioreactors containing activated carbon as support carrier were used to produce H2 anaerobically from a sucrose-limiting medium while acclimated sewage sludge was used as the H2 producer. The effects of bed porosity (b) and substrate loading rate on H2 fermentation were examined using packed beds with b of 70–90% being operated at hydraulic retention times (HRT) of 0.5–4 h. Higher b and lower HRT favored H2 production. With 20 g COD l–1 of sucrose in the feed, the optimal H2 production rate (7.4 l h–1 l–1) was obtained when the bed with b=90% was operated at HRT = 0.5 h. Flocculation of cells enhanced the retention of sludge for stable operations of the bioreactor at low HRTs. The gas products resulting from fermentative H2 production consisted of 30–40% H2 and 60–70% CO2. Butyric acid was the primary soluble product, followed by propionic acid and valeric acid. |
| |
Keywords: | activated carbon flocculated cells H2 production packed-bed bioreactor sewage sludge |
本文献已被 PubMed SpringerLink 等数据库收录! |