保持时间和有机加载率作为无氧共消化关键因素,以改善消化物价值化实践:土壤中的C和N动态
David Fernández-Domínguez1, Logan Sourdon1, Margaud Pérémé1
1INRAE, Univ Montpellier, LBE, 102 Avenue des étangs, 11100 Narbonne, France.
Waste management (New York, N.Y.)
|April 2, 2024
概括
有机废物的无氧共消化 (AcoD) 产生消化物. 优化 AcoD 操作变量,如液压保留时间 (HRT),可以提高土壤应用的消化有机物 (OM) 稳定性.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 生物技术是生物技术.
背景情况:
- 无氧共消化 (AcoD) 越来越多地用于有机废物处理,产生大量的消化物.
- 有效地将消化物回收到土壤中,需要了解AcoD操作变量如何影响有机物质 (OM) 稳定性.
- 食品废弃物和花草混合物是AcoD的常见基质,产生具有不同特性的消化物.
研究的目的:
- 评估AcoD操作参数对消化物OM的稳定性和土壤行为的影响.
- 为了研究液压保留时间 (HRT),有机载荷率 (OLR) 和用消化剂修改的土壤中的碳动态之间的关系.
- 评估在不同的ACOD条件下生产的消化物的矿化潜力.
主要方法:
- 消化的有机物质的生物化学分化.
- 土壤化试验用于测量碳和矿化.
- 分析来自无氧连续反应器的消化物,在不同的HRT和OLR中食食品废料-禾混合物.
主要成果:
- 在AcoD中增加HRT降低了土壤碳矿化 (例如,70天后48%,42天后59%).
- 特定的HRT和OLR值影响了碳的可访问性和复杂性,较长的HRT促进了OM的去除和可溶性OM的复杂性.
- 整个消化物中矿化率是相似的,这表明AcoD将潜在的固定剂转化为有效的肥料.
结论:
- AcoD的操作参数显著影响了消化物OM稳定性和土壤碳动态.
- 控制AcoD性能对于生产适合可持续农业的稳定消化剂至关重要.
- 消化剂的应用可以通过提供可访问的和改善OM特性来提高土壤肥力.
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