Enzymatic hydrolysis of olive tree pruning biomass after different dilute acid pretreatments

  1. Manuel J. Díaz
  2. Juan Miguel Romero-García
  3. Inmaculada Romero
  4. Cristóbal Cara
  5. Manuel Moya
  6. Eulogio Castro 1
  1. 1 Center for Advanced Studies in Energy and Environment (CEAEMA), Universidad de Jaén, 23071 Jaén, Spain
Actas:
2nd International workshop on biorefinery of lignocellulosic materials

Editorial: Ámbito Gráfico S.L.L

ISBN: 978-84-940063-7-1

Año de publicación: 2019

Tipo: Aportación congreso

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Resumen

Biomass generated from pruning of olive trees (OTPB) constitutes one of the main renewable agricultural residues in Mediterranean countries. Pretreatment is a key step in the production of bioethanol from lignocellulosic materials and different pretreatments have been applied toOTPB, with the diluted acid being an effective technology. Sulfuric acid is the most commonly used acid, but its replacement by other acids, such as phosphoric acid, has also been considered. In this work, we have studied the dilute acid pretreatment using water-extracted OTPB(autoclave at 120ºC for 60 min, 10% w/v solids loading). Optimal pretreatment conditions determined by other authors on different batches of OTPB and in different devices [1, 2, 3] were selected. The objective of this study was to evaluate the enzymatic hydrolysis (EH) yields of the resulting water insoluble solid fraction. The conditions for dilute acid pretreatments are shown in Table 1. The conditions leading to highest EH yields were obtained in Run 4 (YP=73.5%). However, the best results considering glucose recovery in water-extracted OTPB (YE=61.4%) was obtained in Run 1.