摘要
目前国内大多数填埋场面临服务期满或提前封场的问题,填埋场开采是实现其循环复生的有效措施之一.然而,填埋堆体内大量短期填埋龄垃圾能否开采利用仍具有较大争议.基于此,研究了青岛市小涧西生活垃圾填埋场一期短期填埋龄(0～3a)垃圾的物理组成及理化性质,以期为填埋场的开采及资源化利用提供依据.结果表明:短期填埋龄垃圾物理组成以塑料、渣土混合物、织物为主,且随埋深的变化呈现不规则波动.0～1a填埋龄垃圾可燃物(46.30%)所占比例略高于2～3a的(37.10%),相较于原生垃圾,短期填埋龄垃圾可燃物组分高,具有较大的焚烧利用价值;0～1a填埋龄垃圾中小于1cm的细料(20.67%)占比低于2～3a(27.27%),且有机质和凯氏氮降解程度也低于2～3a垃圾.
At present,most landfills in China are facing the problems of service expiration or early closure.Landfill mining is one of the effective measures to achieve its reutilization.However,the exploitation and utilization of the large amount of short-term landfill age refuse is still controversial.Based on such circumstances,this paper studies the physical composition and physicochemical properties of the short-term(0～3 years)landfill age refuse of Xiaojianxi Landfill in Qingdao,so as to provide a basis for landfill mining and resource utilization.The results indicate that the composition of short-term refuse in landfill is mainly composed of plastic,muck mixture and fabric,and it shows irregular fluctuations with the buried depth.The proportion of combustibles in 0～1 year refuse(46.30%)is slightly higher than that of 2～3 years(37.10%).Compared with the original refuse,the short-term landfill age refuse has a great potential of incineration due to the high combustible components.And the proportion of fine materials(less than 1 cm)in 0～1 year refuse(20.67%)is lower than that of 2～3 years(27.27%).The degradation of organic matter and Kjeldahl nitrogen of 0～1 year refuse are lower than those of 2～3 years.
引文
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