规模猪场能源生态型和能源环保型粪污处理模式温室气体减排量评估

Assessment of greenhouse gas emission reductions of ecological energy type and environmental protection energy type waste treatment system in large-scale pig farms

能源生态型和能源环保型粪污处理模式是两种常用的先进粪污处理系统,由于处理工艺的不同,其温室气体减排量也不同。文章运用联合国给定的方法学对能源生态型和能源环保型两种先进粪污处理系统的减排量进行定量计算和评估对比,分析其潜在经济效益。案例选自河南某存栏9 000头的规模猪场,基准线以及项目活动排放源包括厌氧消化和好氧过程产生的CH4以及粪污在存贮和利用的过程中产生的N2O;减排量是指基准线排放和项目活动排放的差值。经过估算,运用能源生态型处理系统,年减排温室气总量为8 140 t CO2当量,减排效率为81.9%;运用能源环保型处理系统,年减排温室气体总量为8 616.5 t CO2当量,减排效率为86.7%。可见,能源环保型粪污处理系统的减排效果要优于能源生态型粪污处理系统。

Ecological energy type and environmental protection energy type are two commonly used advanced types for waste treatment systems, but they make a different greenhouse gas emission reduction due to the different treatment process. Our objectives were to use the methodology which U.N enactments to calculate the greenhouse gas （GHG） emission reductions from implementation of the ecological energy type and the environmental protection energy type waste treatment systems and to estimate the two technics. At the same time, estimate their respective potential economic benefits. The case is a large-scale swine farm with 9 000 pigs in Henan. After estimation, Replacement.of the lagoon system with Ecological energy waste treatment systems reduced GHG emissions of 81.9%. Total net emission reductions by the project activity in the 9 000-head finishing operation were 8 140.1 t CO2-eq per year while replacement of the lagoon system with environmental protection energy type waste treatment systems reduced GHG emissions of 86.7%. Total net emission reductions by the project activity in the 9 000-head finishing operation were 8 616.5 t CO2-eq per year. It shows that the emission reduction effect of environmental protection energy type waste treatment systems is superior to that of Ecological energy type.