[改造废水处理厂对碳排放的影响]
Jian Lan1, Dong-Jie Yan1, Yong-Ping Wang2
1Shaanxi Key Laboratory of Environmental Engineering, School of Environment and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Huan jing ke xue= Huanjing kexue
|November 29, 2025
概括
升级污水处理厂提高了废水质量,但增加了碳排放. 太阳能和生物气利用等策略可以帮助减少废水处理的碳足迹.
科学领域:
- 环境工程 环境工程
- 气候变化研究 气候变化研究
- 废水处理技术 废水处理技术
背景情况:
- 污水处理系统是城市碳排放的重要贡献者.
- 越来越严格的污水排放标准要求评估处理厂升级对环境的影响.
- 无氧/无氧/有氧 (A2/O) 过程是城市废水管理中常见的一种生物处理方法.
研究的目的:
- 为了量化碳排放的变化,由于升级一个典型的A2O污水处理厂.
- 评估工厂升级对处理水和污泥直接和间接碳排放强度的影响.
- 确定升级污水处理设施中减少碳排放的潜在策略.
主要方法:
- 在西安市选择一个代表性的A2/O污水处理厂.
- 应用IPCC国家温室气体库存指南和碳排放因子方法.
- 在工厂升级之前和之后,估计碳排放量 (CO2−eq).
主要成果:
- 升级工厂实现了超过95%的COD,BOD5,NH3-N和TP的除去率.
- 年碳排放量增加了15065.65,每水处理成本增加了0.14元.
- 污水和污泥处理的直接和间接碳排放强度在升级后增加,间接排放主导水处理,直接排放主导污泥处理.
结论:
- 在提高水质的同时,污水处理厂的升级导致碳排放增加.
- 间接排放占处理水碳排放的最大份额,而直接排放占污泥的占主导地位.
- 实施诸如光伏发电站,优化DO和NO-N控制以及生物气热联产等战略可以减轻碳排放.
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