File(s) under embargo

Reason: Publisher requirement

11

month(s)

22

day(s)

until file(s) become available

Integrated conversion technologies for sustainable agri-food waste valorization: A critical review

journal contribution
posted on 25.11.2021, 14:42 by Falilat O Kassim, C.L. Paul Thomas, Oluwasola AfolabiOluwasola Afolabi
The global increase in agri-food production results in a consequential societal requirement to better manage the unavoidable and copious agri-food waste (AFW) generated throughout the agri-food chain. Currently, attaining a zero AFW status is not feasible due to the inefficiencies in the agri-food chain. However, technologies to recover energy (electricity, heat, biofuel) and value-added biomaterials from AFW exist, and their effective adoption offers significant environmental and economic benefits. However, implementing efficient utilisation and valorisation of AFW at the scale needed is a non-trivial engineering challenge that must accomplish optimised energy yield (and conversion efficiencies) without environmental harm from fugitive emissions and discharge of secondary pollutants. Despite advances in standalone conversion technologies (SCTs), including thermal (incineration), biochemical (fermentation/anaerobic digestion), and thermochemical (pyrolysis, gasification and hydrothermal processes), there are still unresolved challenges (e.g., selectivity, low conversion efficiency, downstream upgrading of energy carriers), exacerbated by the accompanying production of polluting intermediates and by-products that scale with the process; potentially significant sources of GHG emissions and environmental risk if discharged 59 untreated. Integrated conversion technologies (ICTs), that combine SCTs have been proposed as an approach that processes intermediates and by-products for further energy recovery at source. Effective implementation has the potential to enhance conversion efficiencies, energy carriers’ diversification and yield. This critical appraisal of SCTs, advances in SCTs exploitation as ICTs, and developmental challenges describes the opportunities for efficient utilisation of AFW. The resultant characterisation of barriers to adopting efficient conversion technologies for AFW exploitation also aligns with growing country-level assessments of AFW bioenergy potentials and the next generation of clean energy policy priorities.

Funding

Royal Academy of Engineering (RAEng) under the Research Fellowship Scheme

History

School

  • Science
  • Architecture, Building and Civil Engineering

Department

  • Chemistry

Published in

Biomass and Bioenergy

Volume

156

Publisher

Elsevier

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Biomass and Bioenergy and the definitive published version is available at https://doi.org/10.1016/j.biombioe.2021.106314

Acceptance date

21/11/2021

Publication date

2021-11-24

Copyright date

2021

ISSN

0961-9534

Language

en

Depositor

Dr Sola Afolabi. Deposit date: 23 November 2021

Article number

106314