来自两个全尺寸膜气化生物膜反应堆的氧化排放量
Nerea Uri-Carreño1, Per H Nielsen2, Krist V Gernaey3
1Vandcenter Syd A/S, Vandværksvej 7, Odense 5000, Denmark; Process and Systems Engineering Center (PROSYS), Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads 228A, Kgs. Lyngby 2800, Denmark.
The Science of the total environment
|October 27, 2023
概括
废水处理产生的温室气体排放正在受到审查. 膜气化生物膜反应器 (MABR) 的氧化 (N2O) 排放因子较低,这表明有效地去除营养物质而不会增加N2O的产量.
科学领域:
- 环境工程 环境工程
- 废水处理技术 废水处理技术
- 温室气体排放量 温室气体排放量
背景情况:
- 欧洲即将出台的立法将根据直接温室气体 (GHG) 排放对废水处理设施征税.
- 这就需要对处理过程中的氧化 (N2O) 生产进行更深入的研究.
- 膜气化生物膜反应器 (MABR) 是市政废水处理的一个新兴技术.
研究的目的:
- 量化和分析来自两个全尺寸膜气化生物膜反应堆 (MABR) 的二氧化 (N2O) 排放量.
- 评估操作策略,如氧化降低潜力 (ORP) 控制对N2O排放的影响.
- 为了比较不同的N2O排放因子 (EFN2O) 的计算方法及其与负载率的相关性.
主要方法:
- 持续监测MABR排气气体和液相中的N2O,持续12个月.
- 应用多变量分析来评估过程性能.
- 各种N2O排放因子计算方法的比较.
主要成果:
- 两种MABR的N2O排放因子 (EFN2O) 类似 (0.88 ± 1.28%和0.82 ± 0.86%) 和低于IPCC 2019标准 (1.6%).
- N2O排放主要在排气中,与氨负荷相关,但ORP控制增加了散装N2O贡献.
- 根据计算方法计算的EFN2O从0.6%到5.5%不等;对于高负载率 (>200g N m−3 d−1) 发现平均EFN2O为0.86%.
结论:
- MABR技术显示了强化生物营养物质去除的潜力,同时具有低N2O排放.
- 运营控制策略,如ORP,可以影响N2O生产途径和大规模转移.
- 准确计算N2O排放因子至关重要,并且在很大程度上取决于所采用的方法.
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