Case Study on Recirculatory Semi-aerobic Landfill System in Malaysia

作为这个案例研究的结果，我们开发了另一种低成本的新型垃圾填埋场，它改进了半好氧垃圾填埋场的各项功能。这就是所谓的“循环式半好氧堆填区”，配备了渗滤液再循环系统。该类型的主要功能有：(1)减少渗滤液的数量(2)促进废物的分解(3)改善渗滤液的质素这类堆填区透过渗滤液循环，将空气引入堆填区，以促进废物的分解及改善渗滤液的质素。马来西亚循环半好氧填埋场的田间试验结果表明，初始COD_<Mn>浓度从5200 mg/l降至845 mg/l，初始NH^+_N浓度从1440 mg/l降至550 mg/l。结果表明，在实际使用中，循环式半好氧填埋方式改善了渗滤液质量。图1为作者设计的采用马来西亚首个循环半好氧填埋场类型的低成本系统。通过对垃圾填埋场渗滤液质量的分析，表明该系统在马来西亚效果良好。最近，马来西亚政府根据我们的“堆填型”概念，在设计堆填区时，采用了这一系统，并对渗滤液进行了简单的物理处理。

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".