ABBS-International Conference on Biohydrogen and Bioprocesses 2022 (ABBS 2022) aims to bring together leading academic scientists, researchers and research scholars to exchange and share their experiences and research results on all aspects of sustainable and competitive circular bioeconomy solutions through technological innovation and creativity. It also provides a premier interdisciplinary platform for researchers, practitioners and educators to present and discuss the most recent innovations, trends, and concerns as well as practical challenges encountered and solutions adopted in the fields of BIOHYDROGEN, BIOENERGY, and BIOREFINERY. (excerpts from the ABBS 2022 Website)