一个全面的文献挖掘和分析来自不同创新的主流基于anammox的生物去除工艺的氧化排放
Shuang Liu1, Fan Wu1, Mingzhu Guo1
1College of Marine and Environmental Sciences, Tianjin University of Science & Technology, 300457 Tianjin, China.
The Science of the total environment
|August 16, 2023
概括
与传统方法相比,SNAD,PNA和PDA等创新的生物除 (BNR) 过程显示出较低的氧化 (N2O) 排放量. 机器学习和微生物分析证实了它们在减少废水处理造成的温室气体影响方面的潜力.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 微生物学 微生物学
背景情况:
- 废水处理中的生物除 (BNR) 过程产生大量的氧化 (N2O),这是一个强大的温室气体.
- 在主流条件下,基于anammox的系统的N2O排放存在有限的研究.
研究的目的:
- 系统地调查和比较不同基于anamox的BNR过程 (SNAD,PNA,PDA) 与传统BNR的N2O排放.
- 评估机器学习模型对N2O排放的预测性能,并确定关键影响因素.
主要方法:
- 对SNAD,PNA和PDA过程中N2O排放因子和N2O排放的广泛的大数据统计分析.
- 应用机器学习模型 (SVM,ANN) 和SHAP特征分析来预测N2O排放和评估环境因素影响.
- 斯皮尔曼相关性分析检查N2O排放,操作因素 (HRT,温度,C/N) 和微生物群落之间的关系.
主要成果:
- 与传统BNR相比,SNAD,PNA和PDA的N2O排放因子 (分别为1.01%,1.15%,1.43%的中位数) 显著较低.
- 机器学习模型显示出高预测准确度,环境因素显著影响性能.
- 在N2O排放和HRT,温度和C/N之间发现了负相关性. 关键的微生物物种 (Nitrosomonas,Nitrospira,Denitratisoma,Thauera) 与N2O排放有很强的联系,其中AOB途径主导N2O生产 (93%在PNA,80%在SNAD,48%在PDA).
结论:
- 创新的BNR过程 (SNAD,PNA,PDA) 为减轻废水处理产生的N2O排放提供了一个有前途的战略.
- 环境因素和特定的微生物群落在这些系统中对N2O生产的调节中起着至关重要的作用.
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