EFSA European Food Safety Authority organized a "Webinar on the applications of animal by-products", as part of the regulatory innovations introduced by Regulation (EU) 2019/1381 ("Transparency Regulation"). During the event, which was held on Thursday 1 December 2022, the procedures concerning the implementation of the transparency regulation, the submission of applications, the confidentiality assessment and content sanitisation in place at EFSA were illustrated. It has been also provided practical guidance based on lessons-learnt and principles to consider when submitting applications on alternative methods for the processing of animal by-products (ABP) or derived products. The CHIMERA team participated in the webinar considering that chicken manure, the protagonist of the LIFE project, is a by-product of animal origin: the aim of the GA project n. LIFE15 ENV/IT/000631, is to obtain from its use, fertilizer and energy, thanks to a new technology and a small-sized plant to be installed at the farm.