| dc.description.abstract | 在提升經濟及社會發展的同時，涉及公共衛生和環境安全的固體廢棄物管理，已成為許多開發中國家須優先探討的課題。快速的城市化與人口增長，使有關當局不斷面臨著垃圾產量越來越多的廢棄物處理和處置上的迫切性，使貝里斯的廢物管理成為一個日漸加劇的多層面社會問題。本研究重點在強調於貝里斯市設置標準之衛生掩埋場的需要。
貝里斯有關當局現階段正提議建立一個中央衛生掩埋場，並嘗試關閉目前的簡易型垃圾棄置場。簡易型垃圾棄置場會孳生傳播疾病之大量蚊蠅和鼠類而嚴重危及公共衛生，而且不受控制的垃圾滲出污水也可能污染表面水體和地下水。本研究目的是評估於福國卡地區興建垃圾衛生掩埋場和移除垃圾棄置場之間的成本效益。
福國卡掩埋場的垃圾收取範圍將包括聖佩德羅鎮、卡葉高爾鎮、貝里斯市、聖伊格納西奧、和聖塔伊黎娜等五個主要地區。這些五個區所產生的垃圾年產量，估計到了2030 年將達 45,758 噸/年（約125 噸/日）。福國卡掩埋場的設計容量因此採每天掩埋125 噸的垃圾量進行成本效益評估，評估的因子包括：民眾死亡率和發病率的降低效益，以及關閉及移除垃圾棄置場所取得再生復育土地的價值效益。研究結果顯示，依據所設定的掩埋場設計條件和財務估算假設，福國卡垃圾衛生掩埋場的總造價將為美金$4,312,895 元，20年營運期間的總運營成本是$18,618,912美元。但是，估計的總成本效益將$ 142,879,624美元，遠超過工程興建成本加上營運開支的費用。總成本效益中的$ 131,113,792美元係因降低死亡率和發病率的健康效益，主要是因移除垃圾棄置場因而消除垃圾堆的自發性燃燒產生的二氧化硫空氣污染物，以及減少含鉛重金屬的排放等所獲得的健康效益。其他的可能效益來自關閉及移除垃圾棄置場之復育土地價值，推估為美金$ 11,765,832元。本研究於現金流量估計20年的福國卡衛生掩埋場投資報酬率，投資淨現值為$241,594美元，內部投資報酬率為19%。
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| dc.description.abstract | Solid waste management has become a major priority practice for many developing countries in order to secure the public health and environment while promoting justifiable economic and social development. In Belize, waste management is a multidimensional problem that has been aggravated by rapid urbanization and population growth rate. Therefore, the state environmental agencies are continuously faced with an increasing amount of solid wastes to handle. The goal of solid waste management is to minimize waste generation in the production process through the implementation of more appropriate collection systems for each situation and the employment of recovery and recycling, treatment, and refuse disposal processes and technologies. This paper highlights the need of constructing adequate sanitary landfill site in Belize City.
Currently in Belize, there is an initiative to build a central sanitary landfill, and try to close all existing open-dump facilities for refuse disposal. The refuse open-dump method may have serious danger to public health with its breeding of terrible flies and rats, which can transmit lots of diseases. The uncontrolled leachate from the open-dump refuse site may also pollute surface and ground waters. This study aims at assessing the establishment of Fukuoka semi-aerobic landfill site with the comparison of open-dump sites in the measure of a benefit-cost analysis.
The Fukuoka landfill site will service five major districts including San Pedro Town, Caye Caulker, Belize City, San Ignacio and Santa Elena. The municipal solid wastes generated from these five districts are estimated in this study to be 45,758 tons per year (125 tons per day) in 2030. The Fukuoka landfill site, which designed capacity is 125 tons/day, is assessed by benefit-costs analysis with three factors: the decreased costs of mortality and morbidity due to the reduction of sulphur dioxide from spontaneous burning and the lead emissions from open-dump sites and land use recycling. The results showed that, according to the designed conditions and economic assumption, the total construction cost of the Fukuoka sanitary landfill is US$4,312,895, and the total operation costs for 20-year duration is US$18,618,912. However, the total benefit is estimated to be US$US$142,879,624 that much surpasses the construction costs plus operation expenses. This study has estimated that there will have a benefit of US$131,113,792 getting from decreasing the damage costs of mortality and morbidity, that is because of the elimination of sulphur dioxide from spontaneous burning as well as the reduction of lead emissions from open-dump sites. The other benefit could be from restoring closed open-dump sites, and the restored land value to be US$11,765,832. According to the analysis with cash-flow sheet, the financial benefit of the Fukuoka landfill investment for 20-year duration is that the net present value (NPV) is US $ 2,241,594 and internal rate of return (IRR) is 19%.
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