Nanjing University of Information Science and Technology, School of Hydrology and Water Resources, Nanjing, 210044, China.
Marwadi University, Rajkot, India.
Chemosphere. 2021 Jun;273:129694. doi: 10.1016/j.chemosphere.2021.129694. Epub 2021 Jan 21.
Greenhouse gases (GHGs; particularly, CO, CH, and NO) emission from wastewater treatment systems (WWTS) is one of the inevitable concerns for sustainable development. This indicator is directly linked with the carbon footprint and potential impacts of WWTS on climate change. In this view, various modeling, design, and operational tools have been introduced to mitigate the WWTS associated GHGs, at regional and global scales. In this study, authors have critically reviewed the selected potential operational control strategies for GHGs emission, particularly emitted from the operational stages of biological WWTS. The investigated operational control strategies and/or treatment configurations included intermittent aeration, varying dissolved oxygen, enhanced sludge retention time, coupled aerobic-anoxic nitrous decomposition operation, and microalgae integrated treatment process. Based on this analysis and considering the trade-off between treatment performance of WWTS and GHGs control, an integrated framework is also proposed for existing and upcoming WWTS. The findings of this study and proposed framework will play an instrumental role in mitigating the GHGs at various operational stages of WWTS. Future research works in this direction can lead to a better understanding of investigated operational GHGs emission control strategies in WWTS.
污水处理系统（WwTS）产生的温室气体（GHG；特别是 CO、CH 和 NO）排放是可持续发展不可避免的关注点之一。该指标与碳足迹以及 WWTS 对气候变化的潜在影响直接相关。从这个角度来看，已经在区域和全球范围内引入了各种建模、设计和操作工具来减轻 WWTS 相关的 GHG，特别是从生物 WWTS 的操作阶段排放的 GHG。在这项研究中，作者批判性地回顾了选定的潜在操作控制策略，以减少 GHG 的排放，特别是从生物 WWTS 的操作阶段排放的 GHG。研究的操作控制策略和/或处理配置包括间歇曝气、变化的溶解氧、增强的污泥停留时间、好氧-缺氧亚硝态氮分解操作耦合以及微藻集成处理工艺。基于此分析，并考虑 WWTS 的处理性能和 GHG 控制之间的权衡，还为现有和即将推出的 WWTS 提出了一个综合框架。本研究的结果和提出的框架将在减轻 WWTS 各个操作阶段的 GHG 方面发挥重要作用。在这一方向的未来研究工作可以更好地理解 WWTS 中研究的操作 GHG 排放控制策略。
