摘要
文章以城市生活垃圾为原料,对比分析城市生活垃圾快速好氧发酵预处理前后理化特性的变化,并通过批式厌氧消化实验对预处理前后的厌氧消化产甲烷潜能进行了对比研究.结果表明,经过快速好氧发酵预处理,城市生活垃圾pH值升至7.86,C/N下降至30 ～ 35,碱度出现明显增加,易降解有机物部分降解,难降解有机物的百分含量增加.厌氧消化阶段,未处理和预处理城市生活垃圾中有机物单位VS累积产甲烷量分别为265.0～301.6 mL·g-1VS和308.3 ～358.4 mL·g-1VS,预处理垃圾单位VS累积产甲烷量比未处理高16.34％ ～ 18.83％;未处理和预处理城市生活垃圾中有机物VS去除率分别为75.87％ ～ 81.19％和81.28％～88.00％,预处理垃圾VS去除率比未处理高5.41％ ～6.81％.
The characteristics of municipal solid wastes （MSW）,including total solids （TS）,volatile solids （VS）,pH,carbon to nitrogen ratio （C/N）,alkalinity etc,were investigated before and after fast-aerobic pretreatment,And then the MSW before and after the pretreatment were digested in batch anaerobic fermentation for comparing their digestibility.The results showed that there were large differences between fast-aerobically pretreated and untreated MSW.The pH and alkalinity of treated MSW were higher than untreated MSW,and the C/N ratio was more proper for anaerobic digestion.The accumulative methane yield of treated MSW was 308.3 ～ 358.4 mL · g-1 VS,and that of untreated MSW was 265.0 ～301.6 mL · g1 VS.The methane yields of treated MSW were 16.34％ ～ 18.83％ higher than those of untreated MSW.The VS removal of treated MSW were 81.28％ ～ 88.00％,and that for untreated MSW were 75.87％ ～ 81.19％,which were 5.41％ ～6.81％ higher than untreated MSW.
出处
《中国沼气》
北大核心
2014年第1期57-60,共4页
China Biogas
基金
国家科技部十一五支撑项目(2010BAC67B03)
关键词
城市生活垃圾
快速好氧发酵
厌氧消化
甲烷
municipal solid waste
fast-aerobic fermentation
anaerobic digestion
methane production
