A review on the main affecting factors of greenhouse gases emission in constructed wetlands

Maucieri, Carmelo; Barbera, Antonio C.; Vymazal, Jan; Borin, Maurizio

doi:10.1016/j.agrformet.2017.01.006

Cited by 176 publications

(48 citation statements)

References 216 publications

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“…Finally, in the case of CH4, data acquisition is challenging because difficulties in their measurement due influence of site-specific conditions of the exposed system. For instance, in the case of CWs, the CH4 emissions are influenced by different aspects like environmental conditions (higher water/soil/air temperature and solar radiation increase the emissions) and the choice and agronomic management of vascular plants (Mander et al, 2014;Maucieri et al, 2017). Almost 50% of the reviewed studies considered CH4 emissions, mainly associated with its potential for energy recovery when the sludge is anaerobically digested (e.g.…”

Section: Accounting For Direct Greenhouse Gas (Ghg) Emissionsmentioning

confidence: 99%

Life cycle assessment of wastewater treatment in developing countries: A review

2019

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Within developing countries, wastewater treatment (WWT) has improved in recent years in but remains a high priority sustainability challenge. Accordingly, life cycle assessment (LCA) studies have recently started to analyse the environmental impacts of WWT technologies on the specific context of less developed countries, mainly in China and India. This work presents a comprehensive review of this knowledge with the aim of critically analysing the main conclusions, gaps and challenges for future WWT-related LCAs in developing countries. The most commonly assessed technologies in the 43 reviewed articles are different variations of activated sludge and extensive treatments applied in decentralized systems; however, studies focused on advanced technologies or new sources of pollution (e.g. micropollutants) are still lacking. Goal and system boundaries are normally clearly defined, but significant stages for some technologies such as the construction and sludge management are frequently not included and functional units should be defined accordingly to specific conditions in developing countries. At the inventory level, a more concise description of sources and technical parameters would greatly improve the quality of the LCAs along with accountability of direct greenhouse gas emissions. Eutrophication and global warming are the two

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Section: Accounting For Direct Greenhouse Gas (Ghg) Emissionsmentioning

confidence: 99%

Life cycle assessment of wastewater treatment in developing countries: A review

2019

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“…Numerous factors, such as hydrology, water quality, and meteorology, have direct or indirect effects on water-air interface GHGs emission [26]. To analyze the dominant influencing factors of GHGs in this study, Principal Component Analysis (PCA)was performed on 16 related factors related to the GHGs' flux.…”

Section: Influencing Factors Of Ghg Flux Variation and Accumulative Ementioning

confidence: 99%

Water–Air Interface Greenhouse Gas Emissions (CO2, CH4, and N2O) Emissions Were Amplified by Continuous Dams in an Urban River in Qinghai–Tibet Plateau, China

Yang

Mao

Wei

et al. 2020

Water

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Continuous dams may lead to great variation in greenhouse gas (GHG) emissions from rivers, which contribute more uncertainty to regional carbon balance. This study is among the first to determine water–air interface GHGs (CO2, CH4, and N2O) in a river with continuous dams in plateau city. Combined static-chamber gas and meteorological chromatography were utilized to monitor the GHGs emission flux at the water–air interface within four continuous dams in the Huoshaogou River in the Qinghai–Tibet Plateau, China. A variation coefficient (VC) and amplification coefficient (AC) were designed to detect the influence of continuous dams on GHG emissions. Results indicate that (1) cascade dams presented an amplifying effect on GHGs emissions from the water-air interface. The VCs of three types of GHGs are 3.7–6.7 times higher than those of the undammed area. The ACs of three types of GHGs are 2.7–4.1 times larger than environmental factors; (2) the average GHG emission fluxes in some dams are higher than that of the first dam, indicating that an amplifying effect may have been accumulated by some continuous dams; (3) EC, pH, Twater, Tair and TDS are found to be principle influencing factors of GHG emission and light intensity, Twater, TOC (plant), TN (sediment) and TOC (sediment) are found to be associated with accumulative changes in GHG emission.

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“…This was mainly due to the special hydraulic flow pattern in the SWIS process, as described in Introduction section. Compared with the sand filtration system and constructed wetlands, the special flow pattern of capillary flow (up-flow) and gravity flow (down-flow) led to the longer retention time and higher removal rate of total nitrogen (Zhang et al, 2015;Han et al, 2017;Maucieri et al, 2017;Li et al, 2018). Consequently, in the early stage of water intake (especially 0-1 h), low 15 N abundance was observed in effluent and N 2 O.…”

Section: The Fate Of Nitrate Nitrogen In the Influentmentioning

confidence: 99%

Identification of Nitrous Oxide Generation in Subsurface Wastewater Infiltration System Filled With Mixed Matrix

Yang

et al. 2020

Journal of Environmental Engineering and Landscape Management

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Subsurface wastewater infiltration systems (SWIS) are one of the important sources of nitrous oxide (N2O) production; understanding the biological processes and contributions of N2O will help control the amount of N2O produced. To quantitatively reveal the contribution of nitrification and denitrifiaction processes, 8 g potassium nitrate with 99.99 atom % 15N (i.e. 15N accounts for 99.99% of the total N) was dissolved in the influent (concentration: 3.3 g/L). Results showed that nitrification released more N2O within 0–12 h, accounting for 79.6 ± 2.4%. The denitrification process accounted for 88.5 ± 1.3% for N2O generation after the 12th hour. Thus, in order to effectively control the release of N2O, the denitrification process should be given more attention. The maximum release rate of N2O was 8.45 ± 0.8 mg/m2·h, which occurred near the end of the first wetting-drying cycle. Since then, peaks appeared periodically, mostly in the “rest” periods.

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A review on the main affecting factors of greenhouse gases emission in constructed wetlands

Cited by 176 publications

References 216 publications

Life cycle assessment of wastewater treatment in developing countries: A review

Life cycle assessment of wastewater treatment in developing countries: A review

Water–Air Interface Greenhouse Gas Emissions (CO2, CH4, and N2O) Emissions Were Amplified by Continuous Dams in an Urban River in Qinghai–Tibet Plateau, China

Identification of Nitrous Oxide Generation in Subsurface Wastewater Infiltration System Filled With Mixed Matrix

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