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06:11
Measuring Biomethane Potential of Food Scrap Waste Anaerobically Co-Digested with Waste-Activated Sludge Using Respirometry
Published on: April 26, 2024
Optimization of methane fermentation from effluent of bio-hydrogen fermentation process using response surface
Xing Wang1, Dong-jie Niu, Xiao-shuang Yang
1The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. wangxing24@126.com
Bioresource Technology
|October 9, 2007
Summary
Optimizing methane yield from food waste fermentation requires careful control of substrate concentration, inoculum ratio, and calcium levels. Response methodology successfully identified optimal conditions for maximum methane production.
Area of Science:
- Biochemical Engineering
- Environmental Science
- Renewable Energy
Background:
- Food waste presents a significant disposal challenge and a potential resource for energy recovery.
- Bio-hydrogen fermentation of food waste generates effluent suitable for subsequent methane production.
- Optimizing methane yield is crucial for the economic viability of anaerobic digestion processes.
Purpose of the Study:
- To investigate the individual and interactive effects of key parameters on methane yield from food waste fermentation effluent.
- To determine the optimal conditions for maximizing methane production using response methodology.
- To validate the effectiveness of response methodology in optimizing anaerobic digestion.
Main Methods:
- Central composite design (CCD) for experimental planning.
- Response surface methodology (RSM) for modeling and optimization.
- Analysis of methane yield (CH(4)) based on volatile solids (VS) added.
Main Results:
- Substrate concentration, inoculum to substrate ratio, and Ca(2+) concentration significantly impacted methane yield.
- A significant interactive effect was observed between substrate concentration and inoculum to substrate ratio.
- Optimal conditions yielded a maximum methane yield of 565.76 ml CH(4)/g VS(added).
Conclusions:
- RSM is a valuable tool for optimizing methane fermentation from food waste effluent.
- Identified optimal conditions provide a pathway for enhanced biogas production.
- Understanding parameter interactions is key to maximizing energy recovery from food waste.
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