摘要
针对我国现在主流的城市污水污泥处置方法:填埋,焚烧,堆肥。用IPCC中推荐的方法和缺省值,对处置过程中产生的温室气体的直接排放、间接排放和替代排放做了计算和分析。填埋过程计算排放的温室气体有CH4,焚烧过程计算排放的有温室气体CO2和N2O,堆肥过程计算的排放的有温室气体CO2和N2O,最终比较的结果都折算成CO2的排放。结果表明,污泥填埋、焚烧、堆肥所产生的CO2的净排放量分别为695.847 kg CO2/t、443.643 kg CO2/t、511.817 kgCO2/t。由于考虑了堆肥以后的有机肥利用,从减排以及污泥资源化的角度分析,得出堆肥是相对好的污泥处置方式。
At the present time, sanitary landfills, incineration and composting are the main disposal meth- ods of sewage sludge. The discharge amount of greenhouse gases exhausted during disposing process was calculat- ed and analyzed with the method and default value recommended by the IPCC model. The emitting ways of invol- ving greenhouse gases included direct discharge, indirect discharge and alternative emission. CH4 was the gas considered during landfills process. And for the incineration and composting process, CO2 and N20 were in- volved. The emission of CH4 and N：O was converted to that of CO2. The net emissions of CO2 during sanitary landfills, incineration and composting processed were 695. 847 kg CO2/t, 443. 643 kg CO2/t, 511. 817 kg CO2/ t, respectively. Organic fertilizer obtained from sewage sludge composting can be reutilized. Therefore, compos- ting may be a promising technology for sewage sludge disposal in view of carbon emission reduction and resource utilization.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第6期2285-2290,共6页
Chinese Journal of Environmental Engineering
基金
湖南省两型办课题项目(SLXB-0902)
关键词
污水污泥
温室气体
填埋
焚烧堆肥
sewage sludge
greenhouse gas
landfill
incineration composting
