Microwave assisted acid hydrolysis for bioethanol fuel production from sago pith waste

Thangavelu SK 1 , Rajkumar T 2 , Pandi DK 3 , Ahmed AS 4 , Ani FN 5

Affiliations 

  • 1 Faculty of Engineering, Computing and Science, Swinburne University of Technology, 93350 Kuching, Sarawak, Malaysia. Electronic address: [email protected]
  • 2 Department of Pharmaceutical Chemistry, Creative Educational Society College of Pharmacy, Kurnool, Andhra Pradesh, India
  • 3 Faculty of Engineering, Computing and Science, Swinburne University of Technology, 93350 Kuching, Sarawak, Malaysia
  • 4 Department of Mechanical and Manufacturing Engineering, Faculty of Engineering, Universiti Malaysia Sarawak, Sarawak, Malaysia
  • 5 Department of Thermo Fluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, UTM 81310 Skudai, Johor D.T., Malaysia
Waste Manag, 2019 Mar 01;86:80-86.
PMID: 30902242 DOI: 10.1016/j.wasman.2019.01.035

Abstract

Microwave assisted acid hydrolysis (H2SO4 and HCl with >0.5 mol/L) to produce bioethanol from sago pith waste (SPW) was studied. The energy consumption for microwave hydrolysis at different energy inputs and acid concentration were calculated. The overall energy consumption for bioethanol fuel production from SPW was assessed. A maximum of 88% glucose yield and 80% ethanol yield (3.1 g ethanol per 10 g SPW) were obtained using 1.0 mol/L H2SO4. Microwave hydrolysis using 1.0 mol/L H2SO4 consumed the minimum energy of 8.1 kJ to produce 1 g glucose from SPW when energy input was fixed at 54 kJ (900 W for 1 min). In general, 1 g glucose can produce 16 kJ. The overall energy consumption for fuel grade bioethanol production from SPW was 31.77 kJ per g ethanol, which was slightly higher than the lower heating values of ethanol (26.74 kJ/g ethanol).

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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