摘要
采用4座规模为42m3的模拟实验柱,1号、2号和3号实验柱每周分别回灌填埋垃圾量5.3%,2.7%和0.67%的渗滤液,4号实验柱每周回灌填埋垃圾量0.33%的清水作为控制柱进行对比研究回灌量对渗滤液特性和填埋场稳定化进程的影响.结果表明,5.3%的渗滤液回灌比能更大程度地加速填埋场的稳定化进程,使有机物在更短的时间内释放,减小产甲烷的迟滞时间.采用2.7%回灌比的实验柱能形成更好的微生物环境,反应器温度保持在35℃,对渗滤液有最好的处理效果,COD和BOD5的去除率分别达到了77%和88%,同时还具有最好的抗冲击负荷能力.在实际工程中,应该根据填埋场设计的目标来选择合适的渗滤液回灌量.
Impacts of recirculation volume on leachate characteristic and landfill stabilization rate were studied. Four simulated bioreactor landfill columns were operated weekly with different recirculation ratios, respectively 5.3 %, 2.7 %, 0.67 % leachate and 0.33% water, in this comparative research. The results indicate that simulated reactor with 5.3 % recirculation ratio has the most rapidly stabilization rate and release the most organic pollutant, The shortest methane generation delay was also observed in this column. While simulated reactor with 2.7 % recirculation ratio formed the best microbe environment and kept the highest reactor temperature 35℃. It also had the best impaetive load capacity and treating efficiency to leachate,and removal of COD was 77 % and BOD5 was 88% respectively. In actual projects, appropriate leachate recirculation volume should be chosen according to design purpose of landfill sites.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2006年第1期184-188,共5页
Environmental Science
基金
2002深圳科技局项目
关键词
生物反应器填埋场
渗滤液
回灌
填埋场稳定化
生活垃圾
bioreactor landfill
leachate
recirculation
stabilization
municipal solid waste（MSW）
