Enhancement of Anaerobic Digestion from Food Waste via Ultrafine Wet Milling Pretreatment: Simulation, Performance, and Mechanisms
Abstract
:1. Introduction
2. Materials and Methods
2.1. Food Waste and Inoculum
2.2. UFWM Pretreatment
2.3. Anaerobic Digestion Experiment Design
2.4. Analytical Methods
2.5. DNA Extraction and Metagenomic Sequencing
2.6. Kinetic Modeling
2.7. Statistical Analysis
3. Results
3.1. Methane Production Improvement Triggered by UFWM Pretreatment
3.1.1. Methane Production
3.1.2. Kinetic Analysis
3.1.3. Effects of UFWM Pretreatment on AD Performance
3.2. Substrate Quality Affected by UFWM Pretreatment
3.2.1. Physical Properties of Pretreated Food Waste
3.2.2. Particle Size, Specific Area, and Chemical Properties of Pretreated FW
3.3. Impact of UFWM Pretreatment on the Microbial Activities in AD Process
3.3.1. Microbial Community
3.3.2. Analysis of Pathways
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Model | Modified Gompertz Model | Modified Logistic Model | First-Order Model | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pm | Rm | λ | R2 | RMSE | Pm | Rm | λ | R2 | RMSE | Rm | k | R2 | RMSE | |
Control | 302.705 | 41.968 | 2.039 | 0.998 | 5.565 | 292.363 | 42.677 | 2.491 | 0.996 | 6.598 | 385.560 | 0.095 | 0.995 | 25.441 |
M-0.5h | 337.892 | 52.968 | 2.159 | 0.997 | 6.592 | 332.650 | 51.310 | 2.364 | 0.996 | 7.904 | 414.579 | 0.106 | 0.939 | 31.889 |
M-1h | 321.551 | 51.647 | 1.954 | 0.998 | 5.732 | 317.149 | 52.907 | 2.163 | 0.998 | 5.058 | 374.516 | 0.127 | 0.939 | 29.669 |
M-2h | 376.999 | 52.950 | 2.020 | 0.994 | 11.594 | 370.472 | 53.489 | 2.321 | 0.997 | 7.446 | 459.533 | 0.105 | 0.939 | 35.013 |
M-3h | 391.357 | 58.799 | 1.605 | 0.997 | 7.350 | 385.403 | 59.086 | 1.864 | 0.999 | 5.530 | 448.792 | 0.130 | 0.949 | 32.172 |
M-4h | 407.567 | 60.602 | 1.387 | 0.995 | 10.782 | 401.885 | 60.005 | 1.609 | 0.994 | 11.968 | 460.401 | 0.138 | 0.953 | 32.025 |
Control | M-4h Pretreatment | ||||
---|---|---|---|---|---|
Element | Binding Energy (eV) | Peak Area (%) | Binding Energy (eV) | Peak Area (%) | Assignments |
C1S | 284.8 ± 0.2 | 78.43 ± 0.13 | 284.7 ± 0.1 | 61.42 ± 0.20 | C−C/C=C |
286.4 ± 0.2 | 15.98 ± 0.28 | 286.2 ± 0.2 | 32.71 ± 0.18 | C−N | |
288.9 | 5.59 ± 0.11 | 288.9 | 5.87 ± 0.09 | C=O | |
O1S | 530.8 ± 0.4 | 14.17 ± 0.21 | 530.6 ± 0.2 | 10.42 ± 0.11 | O−H |
531.8 ± 0.2 | 44.73 ± 0.42 | 531.8 ± 0.5 | 57.25 ± 0.25 | C=O | |
532.9 ± 0.5 | 41.10 ± 0.10 | 532.9 ± 0.1 | 32.33 ± 0.22 | O=C−O | |
N1S | 398.9 ± 0.2 | 35.90 ± 0.21 | 398.9 ± 0.2 | 28.98 ± 0.02 | N−H |
399.5 ± 0.3 | 55.74 ± 0.22 | 399.6 ± 0.3 | 59.01 ± 0.15 | C=N | |
401.0 ± 0.2 | 8.36 ± 0.19 | 401.6 ± 0.1 | 12.01 ± 0.21 | C−N |
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Li, Z.; Jiang, X.; Shi, W.; Yang, D.; Zhao, Y.; Zhou, T. Enhancement of Anaerobic Digestion from Food Waste via Ultrafine Wet Milling Pretreatment: Simulation, Performance, and Mechanisms. Sustainability 2024, 16, 2933. https://doi.org/10.3390/su16072933
Li Z, Jiang X, Shi W, Yang D, Zhao Y, Zhou T. Enhancement of Anaerobic Digestion from Food Waste via Ultrafine Wet Milling Pretreatment: Simulation, Performance, and Mechanisms. Sustainability. 2024; 16(7):2933. https://doi.org/10.3390/su16072933
Chicago/Turabian StyleLi, Zongsheng, Xiupeng Jiang, Wenjie Shi, Dongye Yang, Youcai Zhao, and Tao Zhou. 2024. "Enhancement of Anaerobic Digestion from Food Waste via Ultrafine Wet Milling Pretreatment: Simulation, Performance, and Mechanisms" Sustainability 16, no. 7: 2933. https://doi.org/10.3390/su16072933