Estimation of methane emission from an urban wastewater treatment plant applying inverse Gaussian model

Abstract

concentrations inside and around the WWTP varied from 2.04 to 32.78 ppm. Most of the highest concentrations were found inside the WWTP; however, high concentrations were found up to 500 m from its center. The values in the urban zones were between 2.06 and 3.52 ppm, consistently higher in the area with the highest population density. Finally, considering the WWTP as a single source and according to the operational and atmospheric conditions during the studied period, the mean CH 4 emission rate from this source was 2.08E + 04 μg s −1 . The proposed sampling methodology could be applied to estimate CH 4 emission rates from fixed sources in areas with overlapping sources.