Mitigating CH4 and N2O emissions from domestic and industrial wastewater

被引:1
作者
Shukuru, Bitaisha Nakishuka [1 ]
Politaeva, Natalia Anatolievna [2 ]
机构
[1] Peter Great St Petersburg Polytech Univ, Inst Civil Engn, Higher Sch Hydrotech & Power Engn, Dept Civil Engn & Appl Ecol,Lab Ind Ecol, Polytech Skaya St,29 letter B, St Petersburg 195251, Russia
[2] Peter Great St Petersburg Polytech Univ, Inst Civil Engn, Polytech Skaya St,29 letter B, St Petersburg 195251, Russia
关键词
Greenhouse gas; Anaerobic condition; Constructed wetland; Emission estimation; Mitigation technique; Pollutant removal; NITROUS-OXIDE EMISSIONS; CONSTRUCTED WETLANDS; METHANE EMISSIONS; ANAEROBIC-DIGESTION; PHOSPHORUS REMOVAL; GREENHOUSE GASES; FLOW; PERFORMANCE; AQUACULTURE; COLLECTION;
D O I
10.1016/j.rser.2024.115203
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Methane (CH4) and nitrous oxide (N2O) emissions from wastewater treatment systems significantly contribute to global greenhouse gas levels, presenting challenges to climate change mitigation efforts. CH4 emissions primarily arise from anaerobic conditions in wastewater treatment processes, such as lagoons and open sewers, which are common in both developing and developed regions. Constructed wetlands, designed to use natural processes for pollutant removal, can also generate CH4 and N2O under specific conditions. The variability in wastewater treatment methods, ranging from centralized anaerobic plants and lagoons to on-site septic systems, significantly affects emissions. For instance, lagoons deeper than 2-3 m typically create anaerobic conditions conducive to CH4 production, especially in warmer climates where temperatures exceed 15 degrees C. The treatment of domestic and industrial wastewater using constructed wetlands shows promising pollutant removal efficiencies, often exceeding 50 %, but also presents challenges due to potential CH4 and N2O emissions. Emission estimation methods include using default values (Tier 1), country-specific data (Tier 2), or advanced country-specific methodologies (Tier 3). Mitigation of CH4 involves recovery and flaring techniques, while N2O emissions are linked to nitrogen degradation processes in wastewater. Thus, comprehending the specific treatment processes, organic load, and environmental conditions is essential for accurate emission assessments and developing strategies to minimize the climate impact of wastewater management.
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页数:18
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