评估印度城市有机废物生物气利用情况:综合环境经济分析
Prakash Singh1, G L Sivakumar Babu1, Chanakya Hoysall2
1Centre for Sustainable Technologies, Indian Institute of Science, Bangalore 560012, India; Dept. of Civil Engineering, Indian Institute of Science, Bangalore 560012, India.
Bioresource technology
|November 19, 2025
概括
这项研究评估了印度市政废物中的沼气. 发电和直接使用提供了最佳的环境效益,而更大的工厂在经济上是可行的.
科学领域:
- 环境科学 环境科学
- 废物管理 废物管理
- 能源政策 能源政策
背景情况:
- 对于印度的城市固体废物 (OFMSW) 有机部分的沼气利用途径,存在有限的综合环境经济评估.
- 评估了五种途径:燃烧,发电,直接,升级生物甲用于,以及车辆燃料.
- 这项研究解决了优化废物转化能源战略的重大文献差距.
研究的目的:
- 从印度的OFMSW进行第一个综合的生物气利用途径的环境经济评估.
- 评估各种生物CNG工厂规模的生命周期环境影响和技术经济可行性.
- 为印度的废物能源和生物CNG政策提供可行的指导.
主要方法:
- 使用ReCiPe 2016方法的生命周期评估 (LCA).
- 生物CNG工厂的技术经济分析 (TEA) 范围为每天25至500 (TPD).
- 评估环境效益 (减少全球变暖) 和经济指标 (回报期).
主要成果:
- 能源回收途径,特别是发电 (-123公斤CO2-eq/) 和直接生物气 (-108公斤CO2-eq/),可以大幅减少全球变暖.
- 升级密集型路线显示,由于甲损失 (-12至-11公斤CO2eq/) 的环境效益有所减少.
- 低于120 TPD的植物在经济上是不可行的,而较大的植物 (特别是500 TPD) 在不到5年的时间内实现回报,特别是在消化物价值化方面.
结论:
- 优化工厂规模,工艺效率和副产品利用对于印度成功的沼气项目至关重要.
- 这些发现支持通过有效的废物转化能源战略加速国家循环经济和低碳目标.
- 该研究提供了重要的数据,为印度的废物能源和生物CNG政策制定提供了信息.
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