Influence of dilute acid, alkali and hydrothermalpretreatments on methane improvement from datepalm waste “Takarboucht” cultivar

Ikram Mehrez, Mohammed Djaafri, Georgeio Semaan, Manju Sapkota, Oussama Kheireddine Nehar, Slimane Kalloum, Gopalakrishnan Kumar

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


This research assesses the impacts of hydrothermal (120 °C for 30 min), dilute acid (2%(w/w) H2SO4 at 120 °C for 30 min) and alkali (6% (w/w) NaOH at 35 °C for 24 h)pretreatments on the methane yield from date palm waste “Takarboucht” cultivar. The pretreated and untreated date palm waste (DPW) were digested at mesophilic temperature (36 °C) for 20 days. The highest soluble chemical oxygen demand (sCOD) was obtained by DPW hydrolysate from alkali pretreatment. The highest methane yield of 161.86 ml/g VS was obtained from untreated DPW. Among all pretreatments, higher methane yield was obtained from hydrothermally pretreated DPW (153.35 ml/g VS), followed by acid pretreated DPW (141.65 ml/g VS) and alkali pretreated DPW (50.78 ml/g VS). Alkali pretreatment improved the solubilization of DPW, however, it may not necessarily provide an enhancement in the methane yield. The optimization of the conditions of each pretreatment is proposed.

Original languageEnglish
Pages (from-to)2067-2077
Number of pages11
JournalBiomass Conversion and Biorefinery
Issue number3
Publication statusPublished - 2023 Feb

Bibliographical note

Funding Information:
Ikram Mehrez gratefully acknowledges Pr. Gopalakrishnan Kumar for offering aninternship at the University of Stavanger. The authors gratefully acknowledge the financialsupport from the University of Stavanger, Stavanger 4036, Norway. The authors gratefullyacknowledge DGRSDT (The Directorate-General for Scientific Research and TechnologicalDevelopment in Algeria).

Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment


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