【摘要】 分析了重庆长生桥垃圾填埋场和同兴垃圾焚烧厂冬季渗滤液的常规水质特征,并与国内外部分渗滤液进行了比较。结果表明,长生桥填埋场渗滤液水质和同兴焚烧厂差别很大,与填埋时间为10 a左右渗滤液相似,具有较低的COD值(4 173 mg/L)和VFA含量(384 mg/L)、较高的NH3-N含量(3 885 mg/L)和pH值(7.83),很低的BOD5/COD值(0.09);而同兴焚烧厂渗滤液与早期填埋场的水质相似。对比研究了长生桥填埋场和同兴焚烧厂渗滤液中DOM的构成及各组分的分子量分布特征,结果表明,焚烧厂渗滤液中DOC的含量远大于填埋场,但填埋场中HA所占比例高于焚烧厂;分子量分布表明,在大于10 kDA的范围内HA占了60%以上,且HA的分子量随腐化程度的加剧有增大的趋势,而FA和HyI主要分布在2 kDA以下。更多还原

【Abstract】 The winter water quality of leachates from Chongqing Chang Shengqiao municipal solid waste landfill and Tongxing incineration plant were tested.The results were compared with domestic and overseas landfill and incineration leachates.The water quality of Chang Shengqiao landfill leachate had a very high NH3-N concentration(3 885 mg/L),a high pH value(7.83),low concentrations of COD(4 173 mg/L)and VFA(384 mg/L),and poor biodegradability(BOD5/COD=0.09).The Chang Shengqiao landfill leachate was very different from the Tongxing incineration leachate,but was very similar to ten-year-old landfill leachate.The water quality of Tongxing incineration leachate was similar to fresh landfill leachates,however.Based on DOC measurements,the incineration leachate had much more DOM,but the percentage of HA in landfill leachate was much higher.Molecular size distribution data revealed that more than 60% of humic acids distributed in the large molecules region(>10 kDA),while FA and HyI mainly were comprised of low molecules(<2 kDA).Leachate humic substance molecular size had a tendency to increase as humification increased.更多还原