从城市堆肥和便堆肥中有效回收和表征酸:一项比较研究
Marina Fernández-Delgado1, Juan Carlos López-Linares1, Susana Lucas1
1Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain; Institute of Sustainable Processes, Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain.
Waste management (New York, N.Y.)
|November 4, 2023
概括
从城市固体废物堆肥中回收酸提供了价值化机会. 这项研究表明,市政混合废物堆肥 (MMWC) 产生的酸的性能与高质量来源相提并论,证明了经济潜力.
科学领域:
- 环境化学环境化学
- 废物管理 废物管理
- 土壤科学 土壤科学
背景情况:
- 来自城市固体废物处理厂的低质量的堆肥为酸回收和利用提供了机会.
- 从城市混合废物堆肥 (MMWC) 和便堆肥中比较酸回收对于了解它们的潜力至关重要.
- 优化提取条件是最大限度地提高不同堆肥来源的湿酸产量和质量的关键.
研究的目的:
- 为了比较从MMWC和便堆肥中提取的酸的回收和特性.
- 研究温度,时间和KOH度对酸提取效率的影响.
- 评估MMWC作为有价值的湿性物质来源的潜力.
主要方法:
- 使用响应表面方法来确定最佳的提取条件 (温度,时间,KOH度).
- 从MMWC和便堆肥中提取胺酸,使用不同的KOH度.
- 分析了提取的酸的特性,包括有机碳含量,重金属度,分子量和芳香度.
主要成果:
- 最佳提取条件被确定为30°C,24h,每个堆肥类型的KOH度为0.53M (MMWC为0.53M,便堆肥为0.25M).
- 与MMWC (33.7%) 相比,肥料堆肥在液体提取物中产生了更高度的酸 (76.6%).
- 从两种来源提取的酸含有比原始堆肥更高的有机碳和含量,重金属度降低,C/N比率和芳香度相似.
结论:
- 城市混合废物堆肥 (MMWC) 是一种可行的和有吸引力的来源,用于回收具有与高质量堆肥相似的特性的酸.
- 提取过程有效降低重金属度,并消除新出现的污染物.
- 从MMWC中回收的胺酸由于其有利的特性,具有重要的经济价值化潜力.
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