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The Role of Exergy in Energy and the Environment pp 363–372Cite as

Comparison of Acid and Alkaline Pretreatment Methods for the Bioethanol Production from Kitchen Waste

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Abstract

This study was aimed at optimizing the effect of thermochemical pretreatment methods used independently or in combination to maximize the production of fermentable soluble sugars from kitchen waste. The waste was treated with hydrochloric acid (HCl) and sodium hydroxide (NaOH) solutions (in 0–5% concentrations) to convert organic material into fermentable sugars at elevated temperatures. The acid and alkaline pretreatments were compared in terms of the percentages of glucose recovery and the yields of total soluble sugars. According to our results, the glucose percentage and indirectly the glucose concentration were increased by acid or alkaline pretreatment. HCl and NaOH pretreatment at increasing temperatures increased the glucose yield from kitchen waste in comparison with untreated organic material. Our results showed that chemical pretreatment of kitchen waste, using both 1% HCl for 90 min (at 60 °C) and 3% NaOH for 90 min (at 30 °C), increased the soluble sugar concentrations by 95% and 35%, respectively, in comparison with untreated kitchen waste.

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Abbreviations

5-HMF:

5-Hydroxymethyl furfural

AACC:

American Association of Clinical Chemistry

DNS:

Dinitrosalicylic acid

GHG:

Greenhouse gas

H3PO4 :

Phosphoric acid

HCl:

Hydrochloric acid

HNO3 :

Nitric acid

H2SO4 :

Sulfuric acid

KW:

Kitchen waste

NaOH:

Sodium hydroxide

RS:

Reducing sugars

TC:

Total carbohydrates

TS:

Total solids

TVS:

Total volatile solids

VS:

Volatile solids

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Acknowledgements

The author is thankful to the Scientific Research Support Fund of the University of Kocaeli for supporting this work under research grant no. 2016/062.

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Authors and Affiliations

  1. Department of Food Technology, Kocaeli University, Köseköy Vocational School, Kocaeli, Türkiye

    Mine Nazan Kerimak Öner

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  1. Mine Nazan Kerimak Öner
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Correspondence to Mine Nazan Kerimak Öner .

Editor information

Editors and Affiliations

  1. FESB Faculty, LTEF-Head of Laboratory for Thermodynamics and Energy Efficiency, University of Split, Split, Croatia

    Sandro Nižetić

  2. Department of Mechanical Engineering, Aristotle University of Thessaloniki, Process Equipment Design Laboratory, Thessaloniki, Greece

    Agis Papadopoulos

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Kerimak Öner, M.N. (2018). Comparison of Acid and Alkaline Pretreatment Methods for the Bioethanol Production from Kitchen Waste. In: Nižetić, S., Papadopoulos, A. (eds) The Role of Exergy in Energy and the Environment. Green Energy and Technology. Springer, Cham. https://doi.org/10.1007/978-3-319-89845-2_26

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  • DOI: https://doi.org/10.1007/978-3-319-89845-2_26

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-89844-5

  • Online ISBN: 978-3-319-89845-2

  • eBook Packages: EnergyEnergy (R0)

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