污泥无氧消化过程中营养变化的季节性变化与热水解和深度脱水相结合
Bing Zhao1, Yuxin Wang1, Jiawei Wang2
1School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, China.
Waste management (New York, N.Y.)
|April 13, 2025
概括
季节性污泥质量有所不同,秋季营养物质较高. 处理大大改变了营养度,使污泥肥料的质量提高了土地使用的1.6倍.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 废物管理 废物管理
背景情况:
- 污泥质量受到季节性变化和处理过程的影响.
- 营养动力学和有机物质组成是关键因素.
- 了解这些影响对于污泥利用至关重要.
研究的目的:
- 系统地分析泥在不同季节和处理阶段的营养变化.
- 评估特定处理列车 (预脱水+热水解+无氧消化+深度脱水) 对污泥营养成分的影响.
- 使用污泥肥料质量指数 (SFQI) 量化污泥质量,并评估其土地利用潜力.
主要方法:
- 在北京污水处理厂跨季节 (春季,夏季,秋季,冬季) 采集泥样本.
- 对土壤关键营养素的分析:碳 (C), (N), (P), (K), (Na), (Ca) 和 (Mg).
- 评估所选营养素的可降解和可氧化分数,并计算泥肥料质量指数 (SFQI).
主要成果:
- 泥营养物质度 (C,N,P) 在秋季最高.
- 治疗导致C,N和Na度降低,但P,Ca和Mg度增加.
- 观察到可降解和可氧化的K,Na,Ca和Mg分数显著增加.
- 该SFQI显示,处理后的污泥的肥力增加了1.6倍.
结论:
- 污泥的营养含量和成分受到季节性变化和应用的处理过程的重大影响.
- 综合处理显著提高了污泥的肥料质量,使其更适合土地应用.
- 这项研究使用SFQI对污泥质量进行了新的定量评估,支持科学污泥管理和资源回收.
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