Use of organic waste for biohydrogen production and volatile fatty acids via dark fermentation and further processing to methane |
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| Affiliation: | 1. Faculty of Energy, Building Services, Environmental Engineering, Münster University of Applied Sciences, Stegerwaldstr. 39, 48565, Steinfurt, Germany;2. Institute Association for Resources, Energy and Infrastructure, Münster University of Applied Sciences, Stegerwaldstr. 39, 48565, Steinfurt, Germany;3. Ruhr-Universität Bochum, Institute of Urban Water Management and Environmental Engineering, Universitätsstr. 150, 44801, Bochum, Germany;1. Advanced Technology Development Center, Indian Institute of Technology, Kharagpur 721302, India;2. Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India;1. State Key Laboratory of Biochemical Engineering & Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China;2. Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, School of Material Science and Engineering, Qingdao University, Qingdao 266071, PR China;3. University of Chinese Academy of Sciences, Beijing 100049, PR China;1. Civil Engineering, Ryerson University, Toronto, ON, Canada M5B 2K3;2. Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada T6G 1H9;3. Chemical and Biochemical Engineering, Western University, London, ON, Canada N6A 5B9;4. Civil and Environmental Engineering, University of Waterloo, Waterloo, ON, Canada N2L 3G1;1. Department of Chemistry and Bioengineering, Tampere University of Technology, Tampere, P.O. Box 541, FI-33101 Tampere, Finland;2. UNESCO–IHE, Institute for Water Education, Westvest 7, 2611AX Delft, The Netherlands;1. Dipartimento di Ingegneria Civile, Ambientale, Edile, del Territorio e di Chimica, Politecnico di Bari, Via E. Orabona, 4, 70125, Bari, Italy;2. Dipartimento di Ingegneria Civile, Edile ed Ambientale, Università di Napoli Federico II, Via Claudio, 21, 80125, Napoli, Italy;3. Istituto di Ricerche sulla Combustione, Consiglio Nazionale delle Ricerche (IRC)-CNR, p.leV. Tecchio, 80, 80125, Napoli, Italy;4. Dipartimento di Matematica e Applicazioni “Renato Caccioppoli”, Università di Napoli Federico II, Via Cintia, Monte S. Angelo, 80126, Napoli, Italy |
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| Abstract: | ![]()
Despite the suitability of organic waste for dark fermentation (DF), anaerobic digestion (AD) counteracts its large-scale use for biohydrogen production. Therefore, 12 types of organic waste obtained from sugar, textile, food, and milk industries are investigated in batch single-stage AD and compared energetically to batch two-stage DF with subsequent AD. From the viewpoint of DF, a parametric study of mesophilic and thermophilic conditions, different substrate concentrations, and mixed cultures, i.e., granular and digested sludge, is conducted. Hydrogen yields of 90–160 LN/kgoDM (mean) and maximum yields of 199–291 LN/kgoDM are achieved with starchy and sugary wastes. Concentrations of volatile fatty acids of 9.7–14.5 g/L (mean) show the possible material uses. Thermophilic conditions are more suitable than mesophilic ones. Furthermore granular sludge is applicable for DF. The energetic comparison of the procedures demonstrates a method for assessing the applicability of waste and allows preliminary economic estimations. |
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| Keywords: | Two-stage process Wastewater Dark fermentation Hydrogen yield Volatile fatty acids Anaerobic digestion |
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