Assessment of greenhouse gas emission from Nakhon Ratchasima City Municipality’s wastewater treatment plant

Abstract

This study was a retrospective study to analyze greenhouse gas(GHG) emissions from wastewater treatment plant(WWTP) of Nakhon Ratchasima City Municipality during December 1^st., 2017 to November 30^nd.,2018  included to 1 year. The resulted of study showed that total greenhouse gas emissions from NRCM’s wastewater treatment  were an average estimated to 6,611 tons carbon dioxide equivalents(CO₂eq.) per year, corresponding to 0.718 kg.CO₂eq./m³.  First component of WWTP found that total greenhouse gas emissions were an average estimated to 631.155 tons carbon dioxide equivalents(CO₂eq.) per year, corresponding to 0.069 kg.CO₂eq./m³. Accounted for 9.55 % of total emissions from NRCM’s WWTP. Second component of WWTP found that total greenhouse gas emissions were an average estimated to 622.551 tons carbon dioxide equivalents(CO₂eq.) per year, corresponding to 0.068 kg.CO₂eq./m³. Accounted for 9.42 % of total emissions from NRCM’s WWTP. Third component of WWTP found that total greenhouse gas emissions were an average estimated to 5,903.45 tons carbon dioxide equivalents(CO₂eq.) per year, corresponding to 1.602  kg.CO₂eq./m³. Accounted for 81.03 % of total emissions from NRCM’s WWTP. Due to high global warming potential, methane(CH4), nitrous oxide(N2O), biomass mainly contributed in greenhouse gas emission. According to offside emission, electricity consumption was found that total greenhouse gas emissions were an average estimated to 1,516.045 tons carbon dioxide equivalents(CO₂eq.) per year, corresponding to 0.165 kg.CO₂eq./m³. Accounted for 22.93 %   to be main source of indirect GHG emission.