RESEARCH ON CARBON EMISSION ACCOUNTING METHOD FOR TYPICAL WASTEWATER COLLECTION UNITS BASED ON ANAEROBIC CARBON CYCLE THEORY
In order to evaluate the direct carbon emission capacity of typical units in sewage collection systems,the Fenghuang West Street sewage collection unit in Gulou District,Nanjing,Jiangsu Province was taken as the research object.The organic matter molecular structure and microbial community structure were used to speculate the anaerobic reactions that occurred in the system,and the carbon emissions were calculated through changes in the concentration of different types of organic matter and reaction equation coefficients.The results showed that there were significant differences in the types of organic matter and microbial community structure in sewage pipelines,septic tanks,and sewage pumping stations in different drainage functional areas,leading to significant differences in carbon emission capacity of the system.The calculation found that septic tanks have the highest carbon emissions,followed by sewage pipelines,and sewage pumping stations have the smallest.The average CO2 emissions are 169.0,11.6,and 5.1 mg/m3,respectively.The average CH4 emissions are 18.9,7.5,and 2.0 mg/m3,respectively.This study provides more scientific technical means for controlling greenhouse gas emissions,analyzing carbon reduction capabilities,setting carbon intensity reduction targets,and decomposing and implementing assessment indicators in the sewage collection and treatment industry.
anaerobic reactioncarbon emissionsewage collection systemmicrobial community structurecalculation method
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