A review of integration strategies of lignocelluloses and other wastes in 1st generation bioethanol processes. (December 2018)

• Record Type: Journal Article
• Authors: Ferreira, Jorge A.; Brancoli, Pedro; Agnihotri, Swarnima; Bolton, Kim; Taherzadeh, Mohammad J.
• Is Part Of: Process biochemistry. Volume 75(2018)
• Page Start: 173
• Page End: 186
• Publication Date: 2018-12
• Subjects: biorefinery -- filamentous fungi -- 1stgeneration ethanol -- 2ndgeneration ethanol -- lignocelluloses -- wastes; Biochemical engineering -- Periodicals; Biotechnology -- Periodicals; Biochemistry -- periodicals; Biotechnology -- periodicals; Chemical Engineering -- periodicals; Génie biochimique -- Périodiques; Biotechnologie -- Périodiques; Biochemical engineering; Biotechnology; Periodicals; 660.63
• DOI: 10.1016/j.procbio.2018.09.006
• Languages: English
• ISSNs: 1359-5113

Abstract

Graphical abstract: Highlights: 2 nd generation ethanol from lignocelluloses unfeasible as stand-alone process. Substrate integration in 1 st generation facilities can be an alternative. Other wastes can also be integrated in 1 st generation ethanol plants. 2 nd generation ethanol, waste management and biorefineries in one place. Integration is common in 1 st generation sugar-based ethanol facilities. Abstract: First-generation ethanol plants offer successful, commercial-scale bioprocesses that can, at least partially, replace fossil fuels. They can act as platforms to integrate lignocelluloses, wastes and residuals when establishing 2 nd generation ethanol. The present review gathers recent insights on the integration of intrinsic and extrinsic substrates into 1 st generation ethanol plants, through microbial conversion or cogeneration systems. It shows that, among different 1 st generation ethanol plants, sugar-based ethanol by-products, dominate integration studies characterized by strong techno-economic and life-cycle assessment components. In comparison, there are fewer studies that focus on grain-derived lignocellulosic residuals and other wastes. There is consensus that integrating second generation feedstocks into first generation plants can have positive techno-economic and environmental impacts. In addition to realizing production of ethanol from 2 nd generation feedstocks, these possibilities can impact waste management by establishing relevant biorefineries and circular economy. They can also supply a wide range of renewable products. Considering the potential of this waste management strategy, further research on these and many other substrates is needed. This will shed light on the effect of the integration, the relevant types of microorganisms and pretreatments, and of other physical parameters on the effectiveness of running 1 st generation plants with integrated second generation feedstocks.