微元生物反应器填埋时空转换率研究

RESEARCH ON SPACE-TIME CONVERSION RATE OF MICROCELL BIOREACTOR LANDFILL

针对生活垃圾卫生填埋技术在大气污染控制和占用土地两方面的不足,提出了填埋技术未来的发展方向,即"循环可持续填埋及资源化体系":运用生物反应器填埋技术缩短有机垃圾稳定化周期,通过"城市矿山"开采和配套资源化技术重新释放填埋空间,形成填埋单元分区作业及定期循环利用的模式。该体系核心在于稳定化周期的缩减幅度。基于此,在实验室中采取腐殖土批次覆盖、预处理渗滤液回灌和厌氧+好氧联合运行的方式,构建了微元生物反应器填埋(ML)模拟装置。结果表明,跟传统生物反应器填埋(CL)相比,ML在渗滤液水质、垃圾生物稳定性和填埋气成分等方面具有明显优势。ML的时空转换率为1.28,表明其对填埋时间和空间的利用效率高于传统生物反应器填埋。

In order to solve the existing problems of sanitary landfill for MSW treatment,such as its atmosphere pollution and nature of occupying land,the paper put forward a promising sustainable landfilling and recycling system. The bioreactor landfill was constructed to shorten the stabilization period,then the urban mine was exploited,and the resource was utilized to release the occupied space. In this system,the landfill site was zoned for operation and the aged refuse was recycled sequentially. The core function of the system was to shorten the stabilization period. In this study,microcell bioreactor landfill（ ML） simulator was constructed by adopting humus daily cover,pretreated leachate recirculation and anaerobic/aerobic joint operation mode. The results indicated that,compared with conventional bioreactor landfill（ CL）,ML exhibited better performance in terms of leachate characteristics,MSW biological stability and composition of landfill gas. The space-time conversion rate of ML was 1. 28,which meant that it could make higher use of landfill time and space.