A CLEANER CONVERSION OF URBAN WASTE BIOMASS FOR SECOND GENERATION ETHANOL PRODUCTION

Gustavo Kildegaard, Gabriel Salierno, Cataldo De Blasio, Miryan Cassanello, Miguel Galvagno

Research output: Chapter in Book/Conference proceedingConference contributionScientificpeer-review

Abstract

The effect of an acid oxidative digestion on delignification of Municipal Solid Waste (MSW) was investigated. The pre-treatment process is a key stage to disrupt the recalcitrant structure of glucose containing polymers from edible and non-edible components usually present in MSW [1]. Classical dilute acid pre-treatments require high temperatures and the residual lignin from the MSW lignocellulosic portion still hinders the glucose productivity [2]. Delignification of MSW facilitates the generation of fermentable sugars usable for bioethanol production (i.e., saccharification). For this purpose, a low temperature acid-oxidative delignification is proposed. This work reports the amount of glucose evolving from MSW by enzymatic saccharification of a representative sample pre-treated with a mixture of equal volumes of hydrogen peroxide (30%w/w) and glacial acetic acid (PoxAc) at temperatures between 70 and 90 °C, during 30 to 90 minutes. It is worth mentioning that the process is clean since non-toxic renewable solvent is used, and the oxidant decomposes into harmless products.
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2. Toor, M.; Kumar, S.S.; Malyan, S.K.; Bishnoi, N.R.; Mathimani, T.; Rajendran, K.; Pugazhendhi, A. An overview on bioethanol production from lignocellulosic feedstocks. Chemosphere 2020, 242, 125080, doi:10.1016/j.chemosphere.2019.125080.
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Original languageEnglish
Title of host publication8th International Conference on Engineering for Waste and Biomass Valorisation
Publication statusPublished - 2021
MoE publication typeA4 Article in a conference publication

Keywords

  • Second generation bioethanol
  • Biomass pretreatment
  • Municipal solid waste

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