三峡库区填埋场和焚烧厂渗滤液水质季节性差异

Seasonal Variation of Water Quality of Landfill and Incineration Leachates in Three Gorges Area

分析了重庆长生桥垃圾填埋场和同兴焚烧厂渗滤液在常规水质和溶解性有机质组成结构方面的季节性差异. 结果表明，填埋场渗滤液在夏季的ρ（CODCr）, ρ（TOC）, ρ（BOD5）,ρ（BOD5）/ρ（CODCr）和ρ（VFA）均高于其他季节，相应指标在冬季最低，但ρ（NH3-N）和 pH的季节性差异不明显. 填埋场渗滤液中DOM组成结构的季节性差异较大，表现在冬季渗滤液中HA所占比例最高，为16.1%，而春、夏季分别为6.6%和8.1%；冬季渗滤液中HyI所占比例最低，为32.7%，其他季节为41.9%-43.5%；ρ（FA）的季节性差异相对较小. 填埋场中ρ（FA）/ρ（HA）的季节性差异较大，夏季较高，冬季较小. 焚烧厂渗滤液的常规水质，DOM的构成及ρ（FA）/ρ（HA）的季节性差异均很小.

Seasonal variations of conventional water quality and dissolved organic matter （DOM） composition of leachates respectively from Chongqing Changshengqiao Landfill Site and Tongxing Incineration Plant were analyzed. The results showed that all ρ（CODcr）, ρ（TOC）, ρ（BOD5 ）, ρ（BOD5 ）/ρ（CODcr） and ρ（VFA） values of the summer landfill leachate were all higher than those of other season leachates. Theilvalues were the lowest in winter leachate, while there was no distinct difference of ρ（ NH3 -N ） content and pH value among different seasons. The percentage of HA in winter landfill leachate was 16.1%, while only 6.6% and 8.1% in spring and summer landfill leachate respectively. The percentage of HyI in winter landfill leachate was 32.7 %, which was lower than that in other seasons （41.9 % - 43.5 % ）. But the seasonal difference of FA among landfill leachates was relatively less. There was a distinct seasonal difference of ratio of ρ（FA）/ρ（HA） in landfill leachate, which was higher in summer and lower in winter. However, there was little seasonal variation of conventional water quality, DOM composing and ratio of ρ（FA）/ρ（HA） in incineration leachates.