Thermophilic hydrogen production from starch wastewater using two-phase sequencing batch fermentation coupled with UASB methanogenic effluent recycling |
| |
| Affiliation: | 1. Materials Science & Electrochemistry, Via Mantova 11, 00042 Anzio, Rome, Italy;2. ENEA, Technical Unit on Material Technologies, Faenza Laboratories, Via Ravegnana 186, 48018 Faenza, RA, Italy;3. ENEA, Technical Unit on Material Technologies, Casaccia Research Centre, Via Anguillarese 301, 00123 S. Maria di Galeria, Rome, Italy;4. ENEA, Technical Unit for Renewable Energy Sources, Casaccia Research Centre, Via Anguillarese 301, 00123 S. Maria di Galeria, Rome, Italy;1. Department of Chemical and Biochemical Engineering, Western University, London, ON N6A 5B9, Canada;2. Department of Biosystems Engineering, University of Manitoba, Winnipeg, MB R3T 3V6, Canada;3. Department of Civil and Environmental Engineering, Western University, London, ON N6A 5B9, Canada;4. GreenField Specialty Alcohols, Chatham, ON N7M 5J4, Canada;5. Department of Animal Science, University of Manitoba, Winnipeg, MB, Canada;1. Department of Environmental Engineering, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Poland;2. Department of Environmental Microbiology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Poland;1. The Petroleum and Petrochemical College, Chulalongkorn University, Soi Chula 12, Phyathai Road, Pathumwan, Bangkok 10330, Thailand;2. Innovation Learning Center, Srinakarinwirot University, Bangkok 10110, Thailand;3. Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA;4. Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand;1. ENEA-Materials Chemistry and Technology Lab., Casaccia Research Center, Via Anguillarese 301, 00123 Rome, Italy;2. University of Rome “La Sapienza”, Department of Chemical Engineering, Materials & Environment, Via Eudossiana 18, 00184 Rome, Italy;3. CNR – National Research Council, Institute of Nanostructured Materials, Chemistry Department, P.le Aldo Moro 5, 00185 Rome, Italy;1. Sustainable Environmental Process Research Institute, Daegu University, Jillyang, Gyeongsan, Gyeongbuk 38453, South Korea;2. Department of Environmental Engineering, Daegu University, Jillyang, Gyeongsan, Gyeongbuk 38453, South Korea;3. School of Civil and Environmental Engineering, University of Technology Sydney, 15 Broadway, Ultimo, New South Wales 2007, Australia;4. Center for Material Cycles and Waste Management Research, National Institute of Environmental Studies, Tsukuba 305-0053, Japan |
| |
| Abstract: | The aim of this study was to evaluate the performance of thermophilic hydrogenesis coupled with mesophilic methanogenesis in which the effluent was recycled to the hydrogen reactor for starch wastewater treatment. With this system, the hydrogen production rate and yield were 3.45 ± 0.25 L H2/(L·d) and 5.79 ± 0.41 mmol H2/g CODadded respectively, and thus higher than the values of the control group without methanogenic effluent recycling. In addition, relatively higher contents of acetate and butyrate were obtained in the hydrogen reactor with recirculation. The methane reactors were operated with the effluent from the hydrogen reactor, and methane yield was stabilized at 0.21–0.23 L/g CODremoval in both. Analysis of the microbial communities further showed that methanogenic effluent recirculation enriched microbial communities in the hydrogen reactor. Two species of bacteria effective in hydrogenesis, Thermoanaerobacterium thermosaccharolyticum and Clostridium thermosaccharolyticum, dominated during hydrogen production, whereas archaea belonging to Euryarchaeota were detected and cultured in the methane reactor. The recycled effluent supplied alkaline substrates for the hydrogen producing bacteria. Alkali balance calculations showed that the amount of added alkali was reduced by 88%. This amount, required for hydrogen production from starch wastewater, was contributed by alkali in the methanogenic effluent, (2225 ± 140 mg CaCO3/L), resulting in lower operational costs. |
| |
| Keywords: | Two phase fermentation Thermophilic hydrogenesis Methanogenic effluent recycling Starch wastewater |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
