COUPLING H<sub>2</sub>-RICH SYNGAS BIOMETHANATION WITH ANAEROBIC DIGESTION OF FOOD WASTE: A PERFORMANCE ANALYSIS

LIU Xiaoji; YAN Kun; XU Heng; WANG Yongqun; WANG Zhihua; ZHANG Dejia; CHANG Fengmin

doi:10.13205/j.hjgc.202403016

Volume 42 Issue 3

Mar. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(3): 131-137

LIU Xiaoji, YAN Kun, XU Heng, WANG Yongqun, WANG Zhihua, ZHANG Dejia, CHANG Fengmin. COUPLING H2-RICH SYNGAS BIOMETHANATION WITH ANAEROBIC DIGESTION OF FOOD WASTE: A PERFORMANCE ANALYSIS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(3): 131-137. doi: 10.13205/j.hjgc.202403016

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LIU Xiaoji, YAN Kun, XU Heng, WANG Yongqun, WANG Zhihua, ZHANG Dejia, CHANG Fengmin. COUPLING H₂-RICH SYNGAS BIOMETHANATION WITH ANAEROBIC DIGESTION OF FOOD WASTE: A PERFORMANCE ANALYSIS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(3): 131-137. doi: 10.13205/j.hjgc.202403016

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COUPLING H₂-RICH SYNGAS BIOMETHANATION WITH ANAEROBIC DIGESTION OF FOOD WASTE: A PERFORMANCE ANALYSIS

doi: 10.13205/j.hjgc.202403016

1. CECEP (Feixi) WTE Co., Ltd., Hefei 231241, China;
2. Beijing Guohuan Tsinghua Environmental Engineering Design & Research Institute Co., Ltd., Beijing 100084, China;
3. School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;
4. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China

Received Date: 2023-03-20
Available Online: 2024-05-31

Abstract

Abstract

This paper proposed utilizing light fractions of food waste (FW) to produce H₂-rich syngas, followed by coupling of H₂-rich syngas biomethanation with FW anaerobic digestion. A feasibility study was conducted to evaluate the long-term performance of the coupled system of H₂-rich syngas biomethanation and FW anaerobic digestion, as well as its potential in increasing methane production. Both FW anaerobic digestion and H₂-rich syngas biomethanation showed stable performance under conditions of FW organic load (in volatile solids) of 0.5 to 2.0 g/(L·d) and H₂-rich syngas flow rate of 0 to 5.28 L/d. Moreover, the biogas was upgraded, particularly when the FW organic load was 0.5 g/(L·d) and 1.0 g/(L·d), as the average CH₄ content in the product gas reached 96.4% and 86.6%, respectively. Increasing the biomethanation rate in H₂-rich syngas and regulating the pH value, effective alkalinity, and organic acid accumulation in the reactor would further improve the treatment capacity and operational stability of the coupled system. The coupling system was expected to increase methane production by 94.5% at a 300 t/d FW treatment plant. A cost-benefit analysis is required to further evaluate the industrial application potential of this coupling process.
- food waste (FW),
- H₂-rich syngas,
- biomethanation,
- anaerobic digestion,
- biogas upgrading

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References(28)

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