农村生活污水传统处理与源分离处理碳排放比较

Comparison of Carbon Emissions from Traditional Treatment and Source Separation Treatment of Rural Domestic Sewage

基于生活污水碳排放核算方法,结合农村生活污水处理现状,对单户、联户和纳管这3种情景下的传统方案和源分离方案碳排放进行核算.结果表明,单户、联户和纳管传统方案的净碳排放量(以CO_(2)计)分别为1.21、3.37和2.69 kg·m^(-3),单户、联户和纳管源分离方案的净碳排放量(以CO_(2)计)分别为-0.50、-0.04和-0.54 kg·m^(-3),均实现了零碳排放甚至是负碳排放,3种情景下源分离方案的直接碳排放与间接碳排放量均低于传统方案.源分离方案中的碳补偿措施主要来源于储存处理后的尿液土地利用.通过从源头对黑水与灰水进行分离,源分离方案实现了黑水中高浓度污染物的资源化利用,减少排放的同时产生了可观的碳补偿.因此,应大力推广农村生活污水源分离处理,提升农村生活污水资源化利用率,实现农村生活污水处理绿色低碳发展.

Based on the carbon emission accounting method for domestic sewage,combined with the current situation of rural domestic sewage treatment,the carbon emissions of traditional schemes and source separation schemes under the three scenarios of single household,multi-household,and pipeline treatments were calculated.The results showed that the net carbon emissions(calculated as CO_(2))of the single household,multi-household,and pipeline treatment traditional schemes were 1.21,3.37,and 2.69 kg·m^(-3),respectively.The net carbon emissions(calculated as CO_(2))of the single household,multi-household,and pipeline treatments in source separation schemes were-0.50,-0.04,and-0.54 kg·m^(-3),respectively,achieving zero or even negative carbon emissions.The direct and indirect carbon emissions of the source separation scheme were lower than those of the traditional scheme under all three scenarios.The carbon compensation measures in the source separation scheme mainly came from the land use of urine after storage and treatment.By separating blackwater from graywater at the source,the Source Separation Program achieved resource utilization of highly concentrated pollutants in blackwater,reducing emissions while generating significant carbon offsets.Therefore,efforts should be made to promote the separation and treatment of rural domestic sewage sources,improve the utilization rate of rural domestic sewage resources,and achieve green and low-carbon development of rural domestic sewage treatment.