Supplementary information files for Techno-economic analysis of an enhanced anaerobic digester in the Andean area of Peru

Supplementary files for article Techno-economic analysis of an enhanced anaerobic digester in the Andean area of Peru.<br>This paper aims to determine the economic and technical feasibility of developing a thermally enhanced digester in the Andean area using solar collectors. Communities in the rural area of the Andes lack access to electricity and other basic services which impact negatively on their everyday life and exposes them to harmful and inefficient fuels. Several experiences with anaerobic digestion prove that this technology could be applied in the Andean area, although its performance is limited due to low temperatures. To overcome this constraint, an enhanced digester was modelled and simulated using TRNSYS Software. The system consisted of two solar collectors, a storage tank and a digester with a wrapped-around heat exchanger. The average digester temperature in the simulation was 30.7 °C. The enhanced temperature was used in a model to calculate the daily biogas production. The Net Present Value and Internal Rate of Return were calculated and confirm the economic viability of the project. The biogas production fully covers the requirements of the system for household cooking and lighting, making a significant social impact. This simulation indicates that it is technically possible to develop an enhanced digester in the Andean area that is economically viable as well.<br>

《秘鲁安第斯地区强化厌氧消化池技术经济分析》论文补充材料<br>本研究旨在评估在安第斯地区利用太阳能集热器构建热强化型消化池的技术与经济可行性。安第斯山区农村社区缺乏电力及其他基础服务，这对其日常生活造成负面影响，且迫使居民使用有害且低效的燃料。多项厌氧消化相关实践表明，该技术可在安第斯地区应用，但受低温影响，其运行性能受限。为克服这一局限，本研究采用TRNSYS软件对强化型消化池进行建模与仿真。该系统包含两台太阳能集热器、一个储水箱以及一套带环绕式换热器的消化池。仿真结果显示，消化池平均温度可达30.7℃。将该优化后的温度参数代入模型，可计算每日沼气产气量。研究计算了净现值（Net Present Value, NPV）与内部收益率（Internal Rate of Return, IRR），结果证实该项目具备经济可行性。所产沼气可完全满足家庭烹饪与照明的系统需求，由此产生显著的社会效益。本次仿真结果表明，在安第斯地区构建兼具技术可行性与经济可行性的强化型消化池具备实践可能。<br>