Kundu Ashmita, Reddy Chejarla Venkatesh, Singh Ratnesh Kumar, Kalamdhad Ajay S
Department of Civil Engineering, Indian Institute of Technology, Guwahati, Assam, India.
Department of Civil Engineering, National Institute of Technology Goa, Goa, India.
J Environ Manage. 2023 Jun 15;336:117727. doi: 10.1016/j.jenvman.2023.117727. Epub 2023 Mar 14.
The most frequent strategy for solid waste management, adopted across the globe is landfill. Through microbial decomposition municipal solid waste degrades, producing end products such as carbon dioxide, methane, volatile organic compounds, and leachate. High levels of organic waste and heavy metals content in leachate can cause pervasive damage to the ecosystem and contaminate groundwater. Leachate requires extensive treatment before being released into the environment because of its complex chemical composition and identifying the appropriate technologies for leachate treatment remains a key problem for municipal landfill operations. Given the possible harm caused by substantially contaminated leachate, it should adhere to stricter quality criteria for direct disposal of leachate and one treatment method cannot efficiently tackle all the pollutants. In order to reduce the landfill leachates high fouling power, pre-treatment of landfill leachate is necessary. The study provides a comprehensive review of pre-treatment technologies, as well as a critical assessment of strengths and limitations. Current review-based analysis was undertaken based on the filtered 395 papers published for science mapping and to evaluate the qualitative studies in the area of pre-treatment of Landfill Leachate till 2022. A three-step process was employed to conduct bibliometric analysis, qualitative valuation, and identification of influential and productive journals, countries, researchers and articles, emerging technology, and outlining some of the major research gaps in the research field.
全球采用的最常见的固体废物管理策略是填埋。通过微生物分解，城市固体废物会降解，产生二氧化碳、甲烷、挥发性有机化合物和渗滤液等最终产物。渗滤液中高含量的有机废物和重金属会对生态系统造成广泛破坏并污染地下水。由于渗滤液的化学成分复杂，在排放到环境之前需要进行广泛处理，而确定合适的渗滤液处理技术仍然是城市垃圾填埋场运营的关键问题。鉴于大量受污染的渗滤液可能造成的危害，渗滤液直接处置应遵循更严格的质量标准，而且单一处理方法无法有效处理所有污染物。为了降低垃圾填埋场渗滤液的高污染性，对其进行预处理是必要的。该研究全面回顾了预处理技术，并对其优缺点进行了批判性评估。当前基于综述的分析是基于为科学绘图筛选出的395篇论文进行的，旨在评估截至2022年垃圾填埋场渗滤液预处理领域的定性研究。采用了一个三步过程来进行文献计量分析、定性评估以及识别有影响力和高产的期刊、国家、研究人员和文章、新兴技术，并概述该研究领域的一些主要研究差距。
