Modeling of acetate-type fermentation of sugar-containing wastewater under acidic pH conditions
| Autor: | Ya-Zhou Wang, Chang-Bin Chen, Xin-Rong Pan, Han-Qing Yu, Yang Mu, Quanbao Zhao, Chen-Xuan Li, Wen-Wei Li, Liang Huang |
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| Rok vydání: | 2018 |
| Předmět: |
Acidogenesis
Environmental Engineering Methanogenesis Bioconversion 0208 environmental biotechnology Bioengineering 02 engineering and technology Acetates Wastewater 010501 environmental sciences 01 natural sciences Bioreactors Bioreactor Waste Management and Disposal 0105 earth and related environmental sciences Waste management Renewable Energy Sustainability and the Environment Chemistry General Medicine Hydrogen-Ion Concentration Pulp and paper industry 020801 environmental engineering Anaerobic digestion Acetogenesis Fermentation Sugars Methane Hydrogen |
| Zdroj: | Bioresource Technology. 248:148-155 |
| ISSN: | 0960-8524 |
| Popis: | In this study, a kinetic model was developed based on Anaerobic Digestion Model No. 1 to provide insights into the directed production of acetate and methane from sugar-containing wastewater under low pH conditions. The model sufficiently described the dynamics of liquid-phase and gaseous products in an anaerobic membrane bioreactor by comprehensively considering the syntrophic bioconversion steps of sucrose hydrolysis, acidogenesis, acetogenesis and methanogenesis under acidic pH conditions. The modeling results revealed a significant pH-dependency of hydrogenotrophic methanogenesis and ethanol-producing processes that govern the sucrose fermentative pathway through changing the hydrogen yield. The reaction thermodynamics of such acetate-type fermentation were evaluated, and the implications for process optimization by adjusting the hydraulic retention time were discussed. This work sheds light on the acid-stimulated acetate-type fermentation process and may lay a foundation for optimization of resource-oriented processes for treatment of food wastewater. |
| Databáze: | OpenAIRE |
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