Establishment And Evaluation Of Biomass Combustion Emission Inventory In Hainan Province

Biomass combustion is one of the main sources of air pollution.The level of biomass combustion activity is lower than that in northern provinces,but the intensity of pollutant emissions is comparable to that in northern provinces.This study uses the emission factor method to establish a biomass emission inventory for Hainan Province,and uses 2019 as the base year for spatiotemporal distribution and uncertainty analysis.The conclusions are as follows:The pollution situation of biomass combustion emissions from 2016 to 2021 is as follows:a total of 109100tons of CO were emitted,3.8862 million tons of CO₂were emitted,2100 tons of SO₂were emitted,7400 tons of NO_Xwere emitted,19000 tons of NH₃were emitted,37500 tons of CH₄were emitted,and 30900 tons of PM_2.5were emitted.From the perspective of emission sources,rice and sesame straw contribute the largest proportion of pollutants CO and CO₂;Rice and sugarcane straw contributed the largest proportion to pollutants SO₂,NOx,NH₃,and PM_2.5;The contribution of sesame and sugarcane straw to CH4 is the largest.The pollution emissions from straw burning in Hainan Province are mainly concentrated at 4:00 to 6:00,13:00 to 15:00,and 17:00 to 19:00.The pollution emissions from forest fires in Hainan Province are mainly concentrated at 5:00 to 6:00 and 11:00 to 15:00.The main pollution emissions from livestock manure incineration in Hainan Province are from 2:00 to 3:00,5:00 to6:00,and 14:00.The cities with high emissions of pollutants from biomass sources are Haikou City,Wenchang City,and Sanya City.Wuzhishan City have the lowest pollutant emissions.Using the Monte Carlo method,after simulating tens of thousands of calculation processes in Oracle Crystal Ball,the uncertainty range of the biomass combustion emissions inventory in Hainan Province is within 30%.