General Information
    • ISSN: 2010-0221 (Print)
    • Abbreviated Title: Int. J. Chem. Eng. Appl.
    • Frequency: Bimonthly
    • DOI: 10.18178/IJCEA
    • Editor-in-Chief: Prof. Dr. Shen-Ming Chen
    • Executive Editor: Jennifer X. Zeng
    • Abstracting/ Indexing: Chemical Abstracts Services (CAS), Ulrich's Periodicals Directory, CABI, Electronic Journals Library, Google Scholar, ProQuest,  Crossref, EBSCO.
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  • Jun 01, 2020 News! The papers published in Vol.11, No.3 have all received dois from Crossref.
  • May 27, 2020 News! Vol.11, No.3 has been published with online version.   [Click]
Prof. Dr. Shen-Ming Chen
National Taipei University of Technology, Taiwan

IJCEA 2019 Vol.10(3): 64-68 ISSN: 2010-0221
doi: 10.18178/ijcea.2019.10.3.742

Development of Food Waste Disposal Technology Using Sodium Hydroxide

M. Nakayasu and T. Wajima
Abstract—In this research, we focused on the recycling of food waste using sodium hydroxide (NaOH). Pyrolysis of rice, one of the major elements of food waste in Japan, was carried out to obtain carbon material with adsorption ability, together with fuel gases (H2, CH4). As a result, it was possible to convert rice into carbon material while generating fuel gas. With increasing the NaOH addition and temperature, the contents of CO and CO2 decreases, those of H2 and CH4 increased in the generated gas, and the mass of the residue after pyrolysis with NaOH decreases to one-tenth weight of raw rice. The residue after pyrolysis is a carbonaceous material with approximately 80% carbon content, and the residue after pyrolysis with NaOH ( rice sample : NaOH = 1 : 1 ) has smooth porous surface with higher specific surface area (901 m2/g) than that after pyrolysis without NaOH (72 m2/g).

Index Terms—Food waste, sodium hydroxide, fuel gas, pyrolysis, porous carbon material.

Masami Nakayasu and Takaaki Wajima are with Department of Urban Environment Systems, Graduate .School of Engineering, Chiba University, Japan (e-mail:


Cite: M. Nakayasu and T. Wajima, "Development of Food Waste Disposal Technology Using Sodium Hydroxide," International Journal of Chemical Engineering and Applications vol. 10, no. 3, pp. 64-68, 2019.

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