Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, India.
Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, India.
Bioresour Technol. 2020 May;303:122929. doi: 10.1016/j.biortech.2020.122929. Epub 2020 Jan 30.
Sugarcane processing in sugar industry results in generation of vast amounts of wastes, which can be valorized to biofuels and value-added chemicals based on the concept of circular bioeconomy. For successful commercialization, economic and technological bottlenecks must be clearly identified. In this review, the state of the art of various valorization routes are discussed for each waste stream. Subsequently, studies quantifying the environmental impacts and performing techno-economic assessment are reviewed. The scope and bottlenecks involved in the commercialization of these routes are identified and discussed. The review shows that electricity production from bagasse has matured as a technology but the production of value-added chemicals is still lagging. Here, downstream separation and purification are the major hurdles needing technological innovation. Moreover, indirect environmental and human health benefits due to waste valorization are not adequately accounted for. Further, strong trade-offs between economic and environmental performance exist, necessitating systematic and region-specific decision-making framework.
制糖工业中的甘蔗加工会产生大量的废物，可以根据循环生物经济的概念将其转化为生物燃料和高附加值化学品。为了成功实现商业化，必须明确经济和技术方面的瓶颈。在这篇综述中，我们讨论了每种废物流的各种增值途径的最新技术。随后，我们回顾了量化环境影响并进行技术经济评估的研究。确定并讨论了这些途径商业化所涉及的范围和瓶颈。综述表明，从甘蔗渣中发电的技术已经成熟，但生产高附加值化学品的技术仍有待发展。在这方面，下游的分离和纯化是需要技术创新的主要障碍。此外，废物增值所带来的间接环境和人类健康效益没有得到充分考虑。此外，经济和环境绩效之间存在强烈的权衡，需要系统和特定区域的决策框架。
