酸化对固体消化物的转化在热干燥过程中的影响
1School of Agriculture and Biotechnology, Shenzhen Campus of Sun Yat-sen University, No. 66, Gongchang Road, Guangming District, Shenzhen, Guangdong 518107, PR China.
在热干燥前酸性固体消化剂 (SD) 保存了关键的含量. 这一过程提高了有机的可用性,提高了其农学价值,并减少了总体的损失.
科学领域:
- 农业科学 农业科学
- 环境化学环境化学
- 生物地质化学生物地质化学
背景情况:
- 固体消化剂 (SD) 是一种有价值的肥料,但热干燥过程中的损失降低了它的农业潜力.
- 了解SD干燥过程中的有机转化对于优化肥料质量至关重要.
研究的目的:
- 研究SD的热干燥过程中酸化对变化的影响.
- 在不同的pH条件下评估氨 (NH4+-N) 和生物可利用的有机 (BON) 的保存.
主要方法:
- 在130°C的温度下对SD进行热干燥,并控制空气流.
- 在五个时间点的三个pH值 (7.9,6.5,5.5) 进行实验.
- 无机和有机的量化,包括BON的比例.
主要成果:
- 非酸性SD (pH 7.9) 经历了显著的总损失 (49.5%无机,13.6%有机) 和BON比例下降 (51.1%至44.9%).
- 酸化 (pH6.5,5.5) 保持了76.0%-93.4%的NH4+-N,并在干燥后保持了更高的BON比例 (55.6%-57.6%).
- 酸性化减轻了气损失,并增强了SD的气供应潜力.
结论:
- 酸化是一种有效的策略,可以在SD的热干燥过程中保持含量,特别是可生物利用的有机.
- 在SD干燥过程中优化pH值显著提高了其作为肥料的农学价值.
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