Bioelectrochemical technologies such as electro-fermentation and microbial CO₂ electrosynthesis are emerging interdisciplinary technologies that can produce renewable fuels and chemicals (such as carboxylic acids). The benefits of electrically driven bioprocesses include improved production rate, selectivity, and carbon conversion efficiency. However, the accumulation of products can lead to inhibition of biocatalysts, necessitating further effort in separating products. The recent discovery of a new photoenzyme, capable of converting carboxylic acids to bio-alkanes, has offered an opportunity for system integration, providing a promising approach for simultaneous product separation and valorisation. Combining the strengths of photo/bio/electrochemical catalysis, we discuss an innovative circular cascading system that converts biomass and CO₂ to value-added bio-alkanes (C_nH_2n+2, n = 2 to 5) whilst achieving carbon circularity.

电发酵、微生物CO ₂等生物电化学技术电合成是新兴的跨学科技术，可以生产可再生燃料和化学品（如羧酸）。电力驱动的生物过程的好处包括提高生产率、选择性和碳转化效率。然而，产物的积累会导致生物催化剂的抑制，需要进一步努力分离产物。最近发现的一种能够将羧酸转化为生物烷烃的新型光酶为系统集成提供了机会，为同时进行产品分离和增值提供了一种有前景的方法。结合光/生物/电化学催化的优势，我们讨论了一种创新的循环级联系统，可将生物质和 CO ₂转化为具有附加值的生物烷烃 (C _nH _2n+2，n = 2 至 5)，同时实现碳循环。