UIQA/LEAF-Instituto Superior de Agronomia, Ulisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal.
Department of Engineering, Aarhus University, Hangøvej 2, 8200 Århus N, Denmark.
J Environ Manage. 2015 Feb 1;149:46-56. doi: 10.1016/j.jenvman.2014.10.001. Epub 2014 Oct 29.
Ammonia emissions are a major problem associated with animal slurry management, and solutions to overcome this problem are required worldwide by farmers and stakeholders. An obvious way to minimize ammonia emissions from slurry is to decrease slurry pH by addition of acids or other substances. This solution has been used commonly since 2010 in countries such as Denmark, and its efficiency with regard to the minimization of NH3 emissions has been documented in many studies. Nevertheless, the impact of such treatment on other gaseous emissions during storage is not clear, since the studies performed so far have provided different scenarios. Similarly, the impact of the soil application of acidified slurry on plant production and diffuse pollution has been considered in several studies. Also, the impact of acidification upon combination with other slurry treatment technologies (e.g. mechanical separation, anaerobic digestion …) is important to consider. Here, a compilation and critical review of all these studies has been performed in order to fully understand the global impact of slurry acidification and assess the applicability of this treatment for slurry management.
氨气排放是与动物粪便管理相关的一个主要问题，全世界的农民和利益相关者都需要找到解决这个问题的方法。减少粪便 pH 值是减少氨气排放的一种明显方法，可以通过添加酸或其他物质来实现。自 2010 年以来，丹麦等国家已经普遍采用这种方法，许多研究已经证明了它在减少氨气排放方面的有效性。然而，这种处理方法对储存过程中其他气态排放物的影响尚不清楚，因为迄今为止进行的研究提供了不同的情况。同样，酸化粪便在土壤中的应用对植物生产和扩散污染的影响也在一些研究中得到了考虑。此外，酸化与其他粪便处理技术（例如机械分离、厌氧消化等）的结合的影响也需要考虑。在这里，对所有这些研究进行了汇编和批判性评价，以便全面了解粪便酸化的全球影响，并评估这种处理方法在粪便管理中的适用性。
