生物炭在循环生物营养素经济中的作用
Johannes Lehmann1,2,3, Edmundo Barrios4, Mariana Devault5
1Soil and Crop Sciences, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853.
概括
生物炭技术可以通过使干燥营养物质捕获,分离营养物质回收和病原体去除来推进循环生物营养经济. 这一过程减少了浪费,降低了运输成本,并提高了植物的营养供应.
科学领域:
- * 农业科学 农业科学
- * 环境科学 环境科学
- * 材料科学 材料科学
背景情况:
- *循环生物营养经济侧重于管理有机残留物中的营养循环.
- *目前的营养管理实践面临营养损失和运输成本的挑战.
- *有机残留物,包括人类便,含有有价值的营养物质,但需要有效的回收方法.
研究的目的:
- * 探索生物炭技术在刺激循环生物营养素经济方面的潜力.
- * 通过使用生物炭确定成功营养循环的关键要求.
- *评估基于生物炭的营养回收对经济和环境的影响.
主要方法:
- *分析生物炭在从有机残留物中捕获和加工营养素方面的特性.
- * 评估热解过程对废物减少 (重量和体积) 的影响.
- *从含有或不含有尿液的人类便中计算潜在的营养物质 (例如) 贡献.
主要成果:
- *生物炭有助于干燥的营养物质捕获,增加市场价值,降低运输成本.
- * 热解可显著降低排泄物的重量 (85-90%) 和体积 (74-90%).
- *将尿液纳入从人类便中恢复营养的过程中,可以使肥的贡献从全球应用的2%增加到16-17%
- *生物炭通过保持土壤和缓冲pH值来增强植物的营养吸收.
结论:
- *生物炭技术为建立循环生物营养经济提供了可行的途径.
- * 公私伙伴关系和可销售产品对于激励投资至关重要.
- * 内部化环境成本,可能通过碳信用,可能是与传统肥料的成本竞争力所必需的.
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