The search for sustainable resources remains a matter of global interest. The presence of calcium in food waste may be a material to be valued. In this paper we show a new way of precipitating calcium acetate, produced from eggshells, using the supercritical antisolvent technique (SAS). It also presents the study of the precipitation efficiency as a function of the experimental conditions that affect the SAS results - temperature, pressure, liquid solution concentration and injection flow. It was possible to obtain good results under almost all experimental conditions, highlighting a higher yield for 200 bar pressures and lower solution injection flows. The obtained particles have a rod-like appearance having different sizes depending on the operating conditions.

寻找可持续资源仍然是全球关注的问题。食物垃圾中钙的存在可能是值得重视的材料。在本文中，我们展示了使用超临界抗溶剂技术（SAS）沉淀从蛋壳中产生的乙酸钙的新方法。还介绍了根据影响SAS结果的实验​​条件（温度，压力，液体溶液浓度和进样流量）对沉淀效率的研究。在几乎所有实验条件下都可能获得良好的结果，突出显示了200 bar压力下的产率更高，溶液注入流量更低。所获得的颗粒具有根据操作条件而具有不同尺寸的棒状外观。