Case Study on Recirculatory Semi-aerobic Landfill System in Malaysia

作为本案例研究的结果，我们开发了另一种低成本的新填埋场类型，它改善了准好氧填埋场类型的各项功能。这是所谓的“循环式半好氧堆填区”，设有渗滤污水循环系统。这种类型的主要功能是;（1）减少渗滤液量（2）促进垃圾的分解（3）改善渗滤液水质这种填埋方式通过渗滤液回灌向填埋场内引入空气，促进垃圾的分解，改善渗滤液水质。马来西亚好氧填埋场试验结果表明，初始COD_<Mn>（5,200 mg/l）降低到845 mg/l，NH^+_N从1,440 mg/l降低到550 mg/l。从这些结果可以看出，循环式准好氧填埋场在实际应用中改善了渗滤液的质量。图1显示了作者设计的马来西亚第一个循环式准好氧填埋场的低成本系统。通过对垃圾填埋场渗滤液水质的分析，表明该系统在马来西亚运行良好。最近，马来西亚政府根据我们的“垃圾填埋场类型”概念，在垃圾填埋场的设计中使用了这种系统，并进行了简单的渗滤液物理处理。

As the results of this case study, we have developed another low-cost new landfill type which improves each function of the semi-aerobic landfill type. This is the so-called "Recirculatory Semi-aerobic Landfill Type" which is equipped with a leachate recirculation system. Main functions of this type are ;(1)To decrease the amount of leachate(2)To enhance the decomposition of waste(3)To improve the leachate qualityThis type of landfill serves to enhance the decomposition of waste and to improve the leachate quality through the introduction of air into the landfill site by means of leachate recirculation.Results of the field experiments for the recirculatory semi-aerobic landfill type in Malaysia show that initial COD_<Mn> concentrations of 5,200 mg/l decreased to 845 mg/l and NH^+_N of 1,440 mg/l decreased to 550 mg/l.From these results, it is shown that the recirculatory semi-aerobic landfill type improves leachate quality in practical use. Fig.1 shows a low cost system using the first Recirculatory Semi-aerobic Landfill type in Malaysia designed by the author. Based on the analysis of leachate quality from the landfill site, it was shown that this system performed well in Malaysia. Recently, the Malaysian Government has been using this system with a simple leachate physical treatment in the design of landfills based on our concept of "Landfill Type".