Circular economy principles were adopted by European Commission, to support a sustainable growth. They contain general rules that should be considered in all situations. At present, during pandemic, some waste disposal practices are under evaluation to guarantee safety conditions.

For example, in view of the recent results reporting the presence of SARS-CoV-2 virus in sewage sludge, the possibility that it diffuses in the environment is alarming. The situation may result critical in densely populated cities, which are the largest sources of sewage sludge. In this frame the diffused practice of reuse of this waste in agriculture is under revision.

In this context, incineration may represent a valuable alternative strategy to manage

sewage sludge during pandemic. Indeed, due to thermal treatment, the destruction of organic micropollutants and pathogens, eventually present in the waste, is guarantee.

Moreover, it is fundamental to highlight that also if the management of sewage sludge changes, the ash resulting from its combustion may have suitable reuse opportunities, and their landfilling should be avoided.

This work presents the available possibilities of sewage sludge ash recovery in building applications and shows the results obtained by the analysis of their sustainability. The approach is based on the use of embodied energy and carbon footprint values, to make a simple and fast new method able to be a suitable tool to support and promote sustainability also in critical situations (such as pandemic) and when all the information about a technology are not available, making not possible to perform a full-LCA approach.

This work aims to be not only a reference paper for promotion of strategies able to increase waste management safety, but also an example showing that circular economy principles should be pursued also if boundary conditions can change.

欧盟委员会采用了循环经济原则，以支持可持续增长。它们包含在所有情况下都应考虑的一般规则。目前，在大流行期间，正在评估一些废物处置措施，以确保安全状况。

例如，鉴于最近的结果报告了污水污泥中存在SARS-CoV-2病毒，因此它在环境中扩散的可能性令人震惊。在人口稠密的城市（这是污水污泥的最大来源）中，这种情况可能会导致严重后果。在此框架中，正在修订在农业中重复利用这种废物的做法。

在这种情况下，焚烧可能代表了一种有价值的替代管理策略

大流行期间的污水污泥。实际上，由于进行了热处理，因此可以保证销毁最终存在于废物中的有机微污染物和病原体。

此外，必须着重强调的是，如果改变污水污泥的管理方式，其燃烧产生的灰烬可能具有合适的再利用机会，应避免将其填埋。

这项工作提出了建筑应用中污泥灰分回收的可用可能性，并显示了通过对它们的可持续性进行分析而获得的结果。该方法基于对内含的能量和碳足迹值的使用，以使之成为一种简单而快速的新方法，从而成为在危急情况下（例如大流行病）以及当所有关于气候变化的信息都支持和促进可持续性的合适工具。技术不可用，因此无法执行完整的LCA方法。

这项工作不仅是促进能够提高废物管理安全性的策略的参考文件，而且是一个示例，该示例表明如果边界条件可以改变，也应遵循循环经济原则。