Application of an electric field for pretreatment of a feedstock (Laminaria japonica) for dark fermentative hydrogen production |
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| Affiliation: | 1. Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea;2. Center for Water Resources Cycle Research, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Republic of Korea;1. Departments of Pathology, Chonbuk National University, Medical School, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital and Research Institute for Endocrine Sciences, Jeonju, Korea;2. Departments of Obstetrics and Gynecology, Chonbuk National University, Medical School, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital and Research Institute for Endocrine Sciences, Jeonju, Korea;3. Department of Pathology, Konyang, University College of Medicine, Daejeon, Korea;1. Dpto. Selvicultura y Gestión de los Sistemas Forestales, INIA-CIFOR, Madrid E-28040, Spain;2. Unidad de Gestión Forestal Sostenible, Universidad de Santiago de Compostela, Lugo E-27002, Spain;3. Chair of Forest Inventory and Remote Sensing, Georg-August-Universität Göttingen, D-37077, Germany;1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China;2. Department of Life Science and Engineering, Jining University, Jining 273155, China;3. COFCO Nutrition and Health Research Institute, Beijing 100020, China |
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| Abstract: | When using cellulosic biomass as feedstock for dark fermentative hydrogen production (DFHP), feedstock preparation is essential step for enhancement of biodegradability. In the present work, electric field was newly applied as a novel pretreatment technique to Laminaria japonica, a marine brown algae, as an alternative method for feedstock preparation. A feasibility test was first conducted (20–100 V for 30 min). The highest H2 yield (93.6 mL H2 g−1 dry cell weight (dcw)) was achieved at applied voltage of 60 V, while the performance was decreased from applied voltage of 80–100 V due to increasing formation of hydroxymethylfurfural. Subsequently, electric pretreatment conditions (applied voltage and reaction time) were statistically optimized, and a H2 yield of 102.7 mL g−1 dcw was recorded with applied voltage 58.5 V and reaction time 30 min. This was 96.1% of the predicted value. These findings clearly revealed that the application of electric field as pretreatment method has enormous potential as an alternative method for feedstock preparation in DFHP. |
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| Keywords: | Electric field Feedstock preparation Response surface methodology |
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