Journal
WASTE MANAGEMENT
Volume 72, Issue -, Pages 218-226Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2017.10.038
Keywords
Food waste; Anaerobic digestion; Feature objects aided strategy; Kinetic model; Multiple linear regression
Categories
Funding
- National Natural Science Foundation of China [51508230, 21506076]
- National Scientific and Technological Support of China [2013BAB111302]
- Henan Science and Technology Cooperation Project [172106000030]
- Jiangsu Key Laboratory of Anaerobic Biotechnology [JKLAB201601]
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A model based on feature objects (FOs) aided strategy was used to evaluate the methane generation from food waste by anaerobic digestion. The kinetics of feature objects was tested by the modified Gompertz model and the first-order kinetic model, and the first-order kinetic hydrolysis constants were used to estimate the reaction rate of homemade and actual food waste. The results showed that the methane yields of four feature objects were significantly different. The anaerobic digestion of homemade food waste and actual food waste had various methane yields and kinetic constants due to the different contents of FOs in food waste. Combining the kinetic equations with the multiple linear regression equation could well express the methane yield of food waste, as the R-2 of food waste was more than 0.9. The predictive methane yields of the two actual food waste were 528.22 mL g(-1) TS and 545.29 mL g(-1) TS with the model, while the experimental values were 527.47 mL g(-1) TS and 522.1 mL g(-1) TS, respectively. The relative error between the experimental cumulative methane yields and the predicted cumulative methane yields were both less than 5%. (C) 2017 Elsevier Ltd. All rights reserved.
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