Lab of Solid Waste Disposal Engineering, Graduate School of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo 060-8628, Japan.
Waste Manag. 2013 Jan;33(1):102-8. doi: 10.1016/j.wasman.2012.08.008. Epub 2012 Sep 16.
Recently, roofed landfills have been gaining popularity in Japan. Roofed landfills have several advantages over non-roofed landfills such as eliminating the visibility of waste and reducing the spread of offensive odours. This study examined the moisture balance and aeration conditions, which promote waste stabilisation, in a roofed landfill that included organic waste such as food waste. Moisture balance was estimated using waste characterization and the total amount of landfilled waste. Internal conditions were estimated based on the composition, flux, and temperature of the landfill gas. Finally, in situ aeration was performed to determine the integrity of the semi-aerobic structure of the landfill. With the effects of rainfall excluded, only 15% of the moisture held by the waste was discharged as leachate. The majority of the moisture remained in the waste layer, but was less than the optimal moisture level for biodegradation, indicating that an appropriate water spray should be administered. To assess waste degradation in this semi-aerobic landfill, the concentration and flow rate of landfill gas were measured and an in situ aeration test was performed. The results revealed that aerobic biodegradation had not occurred because of the unsatisfactory design and operation of the landfill.
近年来，日本越来越多地采用有顶垃圾填埋场。有顶垃圾填埋场相对于无顶垃圾填埋场具有许多优点，例如可以消除废物的可见性并减少恶臭的扩散。本研究考察了包括食物垃圾在内的有机废物在内的有顶垃圾填埋场中促进废物稳定化的水分平衡和充气条件。水分平衡是通过废物特性和填埋废物的总量来估算的。内部条件是根据垃圾填埋气的组成、通量和温度来估算的。最后，进行了现场曝气以确定垃圾填埋场半好氧结构的完整性。在排除降雨影响的情况下，只有 15%的废物持有的水分作为渗滤液排出。大部分水分仍留在废物层中，但低于生物降解的最佳水分水平，表明应适当喷洒水。为了评估这种半好氧填埋场中的废物降解情况，测量了垃圾填埋气的浓度和流量，并进行了现场曝气试验。结果表明，由于垃圾填埋场的设计和运行不理想，好氧生物降解并未发生。
