US Environmental Protection Agency, Office of Research & Development, 26 Martin Luther King Dr W, Cincinnati, OH, 45268, USA.
Biodegradation. 2023 Oct;34(5):477-488. doi: 10.1007/s10532-023-10034-5. Epub 2023 Jun 20.
The early stages of municipal solid waste degradation in landfills are complex harmonies of physical, biological, and chemical interactions that all work in concert to degrade trash into smaller and more stable materials. While many approaches have been taken to understand parts of this process, this new work attempted to simulate the early stages of landfills in controlled laboratory environments while observing the impacts of food waste content at different concentrations. This was completed by operating landfill lysimeters in a laboratory for approximately 1000 days, simulating landfill interior conditions while measuring the gas and liquid byproducts to study the impact of food waste presence in these environments. Metagenomic analysis after the experiment identified over 18,000 individual species and allowed comparison with past studies while also surveying microorganisms present in landfills. Similar populations found in past studies suggested the current experiments successfully replicated landfill conditions. While food waste diversion had a discernable impact on gas production, it did not show a clear and consistent impact on the microbiomes identified in this study.
垃圾填埋场中城市固体废物降解的早期阶段是物理、生物和化学相互作用的复杂协调，它们协同作用将垃圾降解为更小、更稳定的物质。虽然已经采取了许多方法来了解这个过程的部分内容，但这项新工作试图在控制的实验室环境中模拟垃圾填埋场的早期阶段，同时观察不同浓度下食物垃圾含量的影响。这是通过在实验室中操作垃圾填埋渗滤计大约 1000 天来完成的，模拟垃圾填埋场内部条件，同时测量气体和液体副产物，以研究食物垃圾在这些环境中的存在的影响。实验后的宏基因组分析确定了超过 18000 个单独的物种，并允许与过去的研究进行比较，同时还调查了垃圾填埋场中存在的微生物。在过去的研究中发现的类似种群表明，目前的实验成功地复制了垃圾填埋场的条件。虽然食物垃圾转移对气体产生有明显的影响，但它并没有显示出对本研究中鉴定的微生物组有明显和一致的影响。
