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Fermentative hydrogen production from fresh leachate in batch and continuous bioreactors |
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| Authors: | Liu Qiang Zhang Xiaolei Yu Lijia Zhao Aihua Tai Jun Liu Jianyong Qian Guangren Xu Zhi Ping |
| Institution: | a School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai 200444, PR China b Shanghai Pucheng Thermal Power Energy Co., Ltd., No. 869 Yuqiao Road, Shanghai 201204, PR China c Shanghai Engineering Research of Municipal Solid Waste Treatment and Recycle, No. 345, Shilong Road, Shanghai 200232, PR China d ARC Centre of Excellence for Functional Nanomaterials, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia |
| Abstract: | This research for the first time investigated hydrogen production from the fresh leachate originated from municipal solid wastes. We found that fermentation of the leachate generated H2 and was very much enhanced in the presence of extra phosphate in the batch reactor. The continuous expanded granular sludge bed (EGSB) reactor started to generate H2 at day 20 and continued to 176 days with 120 mg/l of extra phosphate present. The highest chemical oxygen demand (COD) removal efficiency (66.9%) was achieved at liquid up-flow velocity of 3.7 m/h and hydraulic retention time of 12 h. Under proposed optimal operation conditions, the mean H2 production rate reached up to 2155 ml/(l day). We also found that over 80% liquid metabolites were acetic acid and ethanol, suggesting the ethanol-type fermentation was dominant in the bioreactor. These findings indicate that the fresh leachate can be used as the source for continuous hydrogen production. |
| Keywords: | Hydrogen bioproduction Fresh leachate Batch bioreactor Expanded granular sludge bed (EGSB) bioreactor Phosphate |
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