Department of Chemical Engineering, Biotechnology and Environmental Technology, Faculty of Engineering, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark.
Environ Technol. 2011 Apr;32(5-6):633-8. doi: 10.1080/09593330.2010.509355.
In the near future phosphorus (P) will be a limited resource in high demand. This will increase the incentives for recycling P in animal manure. In this study the dry-matter-rich fraction from slurry separation was incinerated and the P availability of the ash fraction examined. The aim was to adjust incineration temperature to support a high plant-availability of P in ash. The plant-availability of P was approximately halved when the incineration temperature was increased from 400 to 700 degrees C. This decrease in plant-availability was probably due to the formation of hydroxyapatite. Incineration temperatures should therefore be kept below 700 degrees C to ensure a high fertilizer efficiency of P in ash. This may conflict with the energy production, which is optimal at temperatures above 800 degrees C. An alternative to incineration may therefore be thermal gasification of the dry-matter-rich fraction, which can be carried out efficiently at lower temperatures.
在不久的将来，磷（P）将成为一种需求量大的有限资源。这将增加回收动物粪便中磷的动力。在这项研究中，对浆渣分离出的富含干物质的部分进行了焚烧，并对灰分中磷的有效性进行了检验。目的是调整焚烧温度，以支持灰分中磷对植物的高有效性。当焚烧温度从 400 摄氏度增加到 700 摄氏度时，磷对植物的有效性大约降低了一半。这种对植物有效性的降低可能是由于形成了羟基磷灰石。因此，焚烧温度应保持在 700 摄氏度以下，以确保灰分中磷的肥料效率高。这可能与能源生产相冲突，因为在 800 摄氏度以上的温度下，能源生产是最佳的。因此，替代焚烧的方法可能是对富含干物质的部分进行热气化，在较低的温度下可以有效地进行热气化。
