Feasibility and pilot study of coupled anaerobic digester and pyrolyzer for co-processing organic waste to renewable natural gas and biochar

厌氧消化器和热解器联合处理有机废物生产可再生天然气和生物炭的可行性和中试研究

• 批准号: 558338-2020
• 负责人: Bi, Xiaotao
• 金额: $ 8.01万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=706753
• 关键词: Feasibility; pilot; study; coupled; anaerobic

Anaerobic digestion (AD) technologies can produce carbon-neutral renewable natural gas (RNG) that significantly decarbonizes the energy system and reduces GHG emissions. Additional benefits include reducing local atmosphere pollution from animal waste storage and land spreading, maximizing the value of biomass waste and producing organic fertilizers from digestate to reduce the overall cost of RNG production. There are some small-scale facilities in British Columbia for anaerobic digestion of agricultural waste and urban source-separated organics for biogas production. However, to deploy AD system broadly for the production of RNG in large quantity at large scale to meet the government's RNG blending target, several challenges still need to be overcome to improve the AD system efficiency in treating various organic waste feedstock, reduce carbon footprint, and better manage the waste digestate streams. Integrated AD-pyrolysis system was a relatively new approach to increase the stability of AD reactor and biogas production, and it has shown a great promise in increasing the overall energy conversion from 33-50% of single AD reactor to more than 80% in the combined AD-pyrolysis system. Majority of studies to date have been performed in components in laboratory or small pilot units without integration. We propose to systematically evaluate the feasibility of an integrated anaerobic digestion and microwave pyrolysis system based on environmental and techno-economic analyses and the test of a small pilot AD reactor and a microwave-assisted fluidized bed pyrolysis reactor. The focus is on the AD reactor performance for co-digestion of crop residues, yard waste, food waste and animal waste with the addition of pyrolysis aqueous liquid (APL) and biochar, microwave catalytic pyrolysis of solids digestate for biochar production and the optimization of biochar properties as an additive to the AD reactor to improve AD performance and for other applications. The overall objective of this project is to provide stakeholders an AD+pyrolysis technology to meet the renewable natural gas blending demands and greenhouse gas emissions reduction targets in British Columbia and Canada.

厌氧消化（AD）技术可以生产可再生的可再生天然气（RNG） 显着使能源系统脱碳并减少温室气体排放。其他好处包括减少 局部气氛污染动物废物存储和土地蔓延，最大化生物质的价值 浪费和从消化酸盐产生有机肥料，以降低RNG生产的总成本。有 不列颠哥伦比亚省的一些小规模设施，用于农业废物和城市的厌氧消化 沼气生产的源分隔有机物。但是，要广泛地部署广告系统以生产 大规模的大量RNG满足政府的RNG混合目标，仍面临一些挑战 需要克服以提高AD系统效率以治疗各种有机废物原料，减少 碳足迹，更好地管理废物消化流。集成的广告热解系统是 相对较新的方法来提高AD反应堆和沼气产生的稳定性，并且显示出很棒的 有望将总能量转化从单个AD反应器的33-50％增加到80％以上 合并的广告热解系统。迄今为止，大多数研究都在实验室的组件中进行 或没有集成的小型飞行员单位。我们建议系统地评估综合的可行性 基于环境和技术经济分析的厌氧消化和微波热解系统 以及小型试点AD反应器和微波辅助流化的床热解反应器的测试。重点是 关于与农作物残留物，院子废物，食物废物和动物废物共同消化的AD反应堆性能 添加热解水溶液（APL）和生物炭，微波催化热解消化 用于生物炭生产和优化生物炭特性作为AD反应器的添加剂以改进 广告性能和其他应用程序。该项目的总体目的是为利益相关者提供 AD+热解技术满足可再生天然气混合需求和温室气体排放 不列颠哥伦比亚省和加拿大的减少目标。