Department of Civil Engineering, Indian Institute of Technology Roorkee, Uttarakhand, 247667, India.
J Environ Manage. 2022 Jan 15;302(Pt A):114060. doi: 10.1016/j.jenvman.2021.114060. Epub 2021 Nov 5.
The commingled nature of the municipal solid waste in many developing nations is one of the primary reasons behind the failure to its successful management. Although there are technologies to effectively treat and process well-segregated and classified waste, they are ineffective in managing the commingled waste. Commingled waste has neither calorific value enough to support waste-to-energy operations nor is it suitable for producing quality compost to generate market value. In this article, a novel Black Soldier Fly Larva (BSFL) -based technology has been proposed and tested to auto-segregate and treat the biodegradable fraction of the Commingled Municipal Solid Waste (CMSW). Several BSFL feeding experiments on five different CMSW compositions were conducted at various temperatures and relative humidity conditions. BSFL could selectively consume the biodegradable fraction of the CMSW to convert it into its body mass and separate itself from the rest of the waste, which mainly consisted of inert and recyclable waste fractions that can be further treated using appropriate waste treatment technology. The mature larvae or the pre-pupae grown at the expense of the biodegradable waste fraction can find several commercial uses. The larvae's consumption rate and weight gain were dependent on the environmental conditions; 30 °C and relative humidity of 65-75% provided the highest consumption rate and most significant weight gain. The batch experiments in the laboratory proved that BSFL could be promising for the treatment of CMSW. The experimental data presented may help design a process for further scaling up an effective treatment method for CMSW, which might benefit many developing nations in managing their waste effectively and economically.
在许多发展中国家，城市固体废物的混合性质是其管理失败的主要原因之一。尽管有一些技术可以有效地处理和处理分类良好的废物，但它们在管理混合废物方面效果不佳。混合废物既没有足够的热值来支持废物转化为能源的操作，也不适合生产高质量的堆肥来产生市场价值。在本文中，提出并测试了一种新颖的基于黑水虻幼虫（BSFL）的技术，以自动分离和处理混合城市固体废物（CMSW）的可生物降解部分。在不同的温度和相对湿度条件下，对五种不同的 CMSW 成分进行了多次 BSFL 喂养实验。BSFL 可以选择性地消耗 CMSW 的可生物降解部分，将其转化为自身的体重，并将自身与其他废物分离，而其他废物主要由惰性和可回收废物组成，可以使用适当的废物处理技术进一步处理。以可生物降解废物为食而生长的成熟幼虫或预蛹可以找到几种商业用途。幼虫的消耗率和体重增加取决于环境条件；30°C 和相对湿度为 65-75% 提供了最高的消耗率和最显著的体重增加。实验室的分批实验证明，BSFL 可能是处理 CMSW 的有前途的方法。所提出的实验数据可能有助于设计一种有效的 CMSW 处理方法的进一步扩大规模的过程，这可能使许多发展中国家在有效和经济地管理其废物方面受益。
