在污水污泥焚烧过程中,物种的生物利用度过渡路径
Qianqian Guo1, Yanan Wang1, Lingqin Zhao1
1Institute of Thermal and Power Engineering, Zhejiang University of Technology, HangZhou, 310023, China.
Environmental research
|January 23, 2024
概括
污水污泥焚烧灰 (SSIA) 提供回收来源. 焚烧转化物种,增加无机的生物可用性,特别是在更高的温度下.
科学领域:
- 环境化学环境化学
- 废物管理 废物管理
- 资源恢复 资源回收 资源回收
背景情况:
- 污水污泥焚烧灰 (SSIA) 是一个重要的 (P) 源.
- 了解P物种的生物可用性对于有效的恢复至关重要.
- 污水污泥 (SS) 含有各种P形式,影响回收潜力.
研究的目的:
- 在SS焚烧过程中全面调查P物种的生物可用性过渡途径.
- 阐明焚烧条件如何影响P物种化和生物可用性.
- 为在焚烧过程中有效的P迁移提供理论支持.
主要方法:
- 在SS焚烧过程中在不同温度下对P物种转化的分析.
- 调查无机 (IP),非酸盐无机 (NAIP) 和酸盐 (AP) 过渡的作用.
- 评估添加剂 (煤炭,米,蛋) 和气态副产品 (SO2) 对P物种化的影响.
主要成果:
- 焚烧将有机P转化为无机P,形成AP和NAIP物种.
- 燃烧温度的提高促进了NAIP中稳定的AP (Ca/Mg-P) 的形成,从而提高了生物可用性.
- 较高的温度导致IP比例增加 (>98%),NAIP下降,AP度增加.
- 富含的添加剂促进AP的形成,而SO2通过形成CaSO4来抑制它.
结论:
- 焚烧显著改变了P的分化,通过温度依赖的转化增强了生物可用性.
- 控制焚烧温度和添加剂,可以从SSIA中进行有针对性的P回收.
- 这项研究为优化从污水污泥焚烧灰中的P回收过程提供了理论基础.
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