Department of Chemical Engineering, Zakir Husain College of Engineering and Technology, Aligarh Muslim University, Aligarh, India.
Department of Chemical Engineering, Indian Institute of Technology, New Delhi, India.
Waste Manag Res. 2021 Aug;39(8):1101-1111. doi: 10.1177/0734242X20985602. Epub 2021 Feb 15.
The enormous quantities of municipal solid waste (MSW) generation in Indian cities has emerged as a serious concern. In order to reduce the negative environmental impacts of MSW accumulation in dumpsites or unsecured landfills across India, various measures have been proposed to facilitate conversion of MSW into a valuable resource. One such measure is the immense potential for utilization of MSW as a source of energy. In this study, a comprehensive estimation of the energy potential of freshly dumped MSW has been conducted at a large unsecured landfill site in Okhla, Delhi, which is the capital city of India. Multiple regression models were developed to predict gross calorific value (GCV) and net calorific value (NCV) of MSW in terms of physical composition, proximate analysis and ultimate analysis of the waste. The developed models were found to give a reasonably good prediction of energy content of freshly dumped MSW in the landfill. Food waste, inerts, textile and paper were found to be the prime constituents of fresh MSW arriving at the landfill site. Based on the statistical analysis, volatile matter content and oxygen content of MSW were found to be non-significant terms in the energy content models derived using proximate analysis and ultimate analysis, respectively. The models developed in this study can be used to predict energy content of MSW at other landfill sites in India under similar climatic conditions and disposal practices.
印度城市产生的大量城市固体废物 (MSW) 已成为一个严重的问题。为了减少印度各地垃圾填埋场或无安全保障的垃圾填埋场中 MSW 堆积对环境的负面影响，已经提出了各种措施来促进将 MSW 转化为有价值的资源。其中一项措施是利用 MSW 作为能源的巨大潜力。在这项研究中，对印度首都德里奥赫拉的一个大型无安全保障的垃圾填埋场中刚倾倒的 MSW 的能量潜力进行了全面估算。针对废物的物理组成、近似分析和最终分析，开发了多个预测 MSW 总热值 (GCV) 和净热值 (NCV) 的回归模型。结果表明，这些模型可以合理地预测垃圾填埋场中刚倾倒的 MSW 的能量含量。在运往垃圾填埋场的新鲜 MSW 中，发现食物垃圾、惰性物质、纺织品和纸张是主要成分。根据统计分析，在使用近似分析和最终分析得出的能量含量模型中，MSW 的挥发性物质含量和氧含量分别是非显著项。本研究中开发的模型可用于预测印度其他在类似气候条件和处置实践下的垃圾填埋场中的 MSW 能量含量。
