Methane and carbon dioxide emissions from constructed wetlands receiving anaerobically pretreated sewage

The Science of the Total Environment
D de la VargaM Soto

Abstract

The aim of this research was to determine methane and carbon dioxide emissions from a hybrid constructed wetland (CW) treating anaerobically pre-treated sewage. The CW was constituted of two horizontal flow (free water surface followed by a subsurface) units. A long-term study was carried out as both CW units were monitored for three campaigns in Period 1 (0.9-1.5years after start-up), and four campaigns in Period 2 (4.5-5.8years after start-up). The closed chamber method with collecting surfaces of 1810cm(2) was used. For this system, variability due to position in the transverse section of CW, plant presence or absence and recommended sampling period was determined. Overall methane emissions ranged from 96 to 966mgCH4m(-2) d(-1), depending on several factors as the operation time, the season of the year and the position in the system. Methane emissions increased from 267±188mgCH4m(-2)d(-1) during the second year of operation to 543±161mgCH4m(-2)d(-1) in the sixth year of operation. Methane emissions were related to the age of the CW and the season of the year, being high in spring and becoming lower from spring to winter. Total CO2 emissions ranged mostly from 3500 to 5800mgCO2m(-2)d(-1) during the sixth year of operation, wh...Continue Reading

References

Dec 5, 2006·Bioresource Technology·Joan GarcíaManuel Soto
Jan 6, 2007·The Science of the Total Environment·A K Søvik, B Kløve
Sep 7, 2007·Water Science and Technology : a Journal of the International Association on Water Pollution Research·P GuiY Inamori
Dec 27, 2008·Environmental Pollution·Gabriel Maltais-LandryFlorent Chazarenc
Feb 10, 2009·Bioresource Technology·C ChiemchaisriP N Wicranarachchi
Dec 26, 2009·Chemosphere·Sunitha R PangalaKate V Heal
Jan 28, 2012·Water Research·Enrica UggettiIvet Ferrer

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Citations

Jul 16, 2020·Environmental Science and Pollution Research International·Omar Gael GonzaloManuel Soto
Aug 16, 2017·Environmental Science and Pollution Research International·Verónica TorrijosManuel Soto
Jul 12, 2020·Environmental Science and Pollution Research International·Ru XueWei Chen
Feb 22, 2021·Journal of Environmental Management·Shokoufeh SalimiMiklas Scholz

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