This book includes peer-reviewed articles from the 4th International Conference on Biomass Utilization and Sustainable Energy 2024 (ICoBiomasSE 2024) organized by the Centre of Excellence for Biomass Utilization (COEBU), Universiti Malaysia Perlis (UniMAP), held at Penang in MalaysiaThis book includes peer-reviewed articles from the 4th International Conference on Biomass Utilization and Sustainable Energy 2024 (ICoBiomasSE 2024) organized by the Centre of Excellence for Biomass Utilization (COEBU), Universiti Malaysia Perlis (UniMAP), held at Penang in Malaysia from 2nd to 3rd of Sept. The theme of the conference "Nurturing Sustainability through Net Zero Emissions, Circular Economy and Academia-Industry Collaboration" has been selected to address the escalating environmental concerns through initiatives such as achieving net-zero emission, embracing circular economy principles and strengthening the academia-industry partnership for a sustainable future. The contents are broadly divided into seven parts: (1) sustainable biomass resources for decarbonising the economy, (2) biomass conversion technologies for bioenergy (3) biomass conversion to intermediates and products, (4) bioeconomy sustainability, impacts and policies, (5) bioenergy integration, and (6) techno-economic in biomass energy. It provides a platform to college or graduate students, professionals, researchers, academicians, policy makers and industries working in the areas of biomass utilization and sustainable energy to solve long-standing environmental issues for healthier planet. It may also be of interests for environmentalist and materialists who work on planning, engineering, and management fields.