WasteSafe, KUET, Department of Civil Engineering, Khulna University of Engineering & Technology, Khulna 920300, Bangladesh.
Waste Manag. 2012 Nov;32(11):2046-55. doi: 10.1016/j.wasman.2012.05.039. Epub 2012 Jul 2.
This study is concerned with the performance of a Demo Compost Plant for the development of acceptable composting technology in Bangladesh. The Demo Compost Plant was setup at the adjacent area of an existing compost plant located at Khulna city in Bangladesh. Four different composting technologies were considered, where Municipal Solid Waste (MSW) were used as a raw material for composting, collected from the adjacent areas of the plant. Initially the whole composting system was conducted through two experimental setups. In the 1st setup three different types of aerators (horizontal and vertical passively aerator and forced aerator) were selected. For a necessary observation four piles, using only MSW as the input materials in the first three compost pile, the fourth one was the existing Samadhan's compost pile. Based on the analysis of the experimental findings, the horizontal passively aerated composting technique is suitable for Bangladesh as it had better performance for reducing composting period than that of the others. It was being observed from the quality parameters of compost in the both 1st and 2nd setup that as the waste directly come from kitchen, degradation rate of waste shows a positive result for reducing this waste and there is no possibility of toxic contamination, when it would be used as a soil conditioner. Though there is no significant improvement in the quality of the final product in the 2nd setup as comparing with the 1st setup but it fulfills one of the main objectives of this study is to reduce the whole composting period as well as immediate management of the increasing amount of waste and reducing load on landfill. Selfheating tests reveal that degree of stability of compost with respect to maturation period was remained in the acceptable level, which was further accelerated due to the use of organic additives.
本研究关注的是一个示范堆肥厂的运行情况，该示范堆肥厂旨在开发孟加拉国可接受的堆肥技术。示范堆肥厂建在孟加拉国库尔纳市一个现有堆肥厂的相邻区域。考虑了四种不同的堆肥技术，其中城市固体废物（MSW）用作堆肥的原料，从工厂相邻区域收集。最初，整个堆肥系统通过两个实验装置进行。在第一个装置中，选择了三种不同类型的曝气器（水平和垂直被动曝气器和强制曝气器）。为了进行必要的观察，使用仅作为输入材料的 MSW 在头三个堆肥堆中的前四个堆中，第四个是现有的 Samadhan 堆肥堆。基于实验结果的分析，水平被动曝气堆肥技术适合孟加拉国，因为它比其他技术具有更好的缩短堆肥周期的性能。从第一和第二个装置中的堆肥质量参数可以看出，由于废物直接来自厨房，废物的降解率表明减少这种废物的积极结果，并且当用作土壤调节剂时，没有产生毒性污染的可能性。虽然在第二个装置中，与第一个装置相比，最终产品的质量没有显著提高，但它实现了本研究的主要目标之一，即缩短整个堆肥周期，以及立即管理不断增加的废物量并减少对垃圾填埋场的负担。自热测试表明，堆肥在成熟期间的稳定性程度保持在可接受的水平，由于使用有机添加剂，进一步加速了堆肥的成熟。
