富氢合成气生物甲烷化与餐厨垃圾厌氧消化耦合性能分析
COUPLING H2-RICH SYNGAS BIOMETHANATION WITH ANAEROBIC DIGESTION OF FOOD WASTE:A PERFORMANCE ANALYSIS
刘晓吉 1颜锟 2徐恒 3王勇群 1王志华 1张德家 1常风民4
作者信息
- 1. 中节能(肥西)环保能源有限公司,合肥 231241
- 2. 北京国环清华环境工程设计研究院有限公司,北京 100084
- 3. 中国矿业大学(北京)化学与环境工程学院,北京 100083
- 4. 清华大学环境学院环境模拟与污染控制国家重点联合实验室,北京 100084
- 折叠
摘要
提出利用餐厨垃圾轻物质生产富氢合成气,并将富氢合成气生物甲烷化与现有餐厨垃圾厌氧消化单元耦合的工艺路线,为评估其可行性,考察了耦合系统的长期运行性能,并分析了该系统提升现有甲烷(CH4)产量的潜力.结果表明:在餐厨垃圾有机负荷(以挥发性固体质量计)为0.5～2.0 g/(L·d)、富氢合成气流量为0～5.28 L/d条件下,餐厨垃圾厌氧消化与富氢合成气生物甲烷化均能保持稳定运行,且沼气提纯效果明显,尤其在餐厨垃圾有机负荷为0.5,1.0 g/(L·d)时,产品气中CH4的平均含量分别高达96.4％和86.6％;提高富氢合成气生物甲烷化速率以及优化调控反应体系的pH值、有效碱度和有机酸积累量有助于进一步提高该耦合系统的处理能力和运行稳定性;以300 t/d餐厨垃圾处理厂为例,该耦合系统预计能提高94.5％的CH4产量,后续有必要结合成本效益分析,进一步评估该耦合工艺的工业化应用潜力.
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.
关键词
餐厨垃圾/富氢合成气/生物甲烷化/厌氧消化/沼气提纯Key words
food waste(FW)/H2-rich syngas/biomethanation/anaerobic digestion/biogas upgrading引用本文复制引用
基金项目
国家重点研发计划(2020YFC1908600)
出版年
2024
NETL
NSTL
万方数据