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    •   BracU IR
    • School of Engineering and Computer Science (SECS)
    • Department of Electrical and Electronic Engineering (EEE)
    • Thesis & Report, BSc (Electrical and Electronic Engineering)
    • View Item
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    The effects of electric field on microorganisms in semi-liquid and liquid edible food substances

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    10321045.pdf (4.277Mb)
    Date
    2015-08
    Publisher
    BRAC University
    Author
    Rahman, Adel Basher
    Choudhury, Mohd. Wasim
    Metadata
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    URI
    http://hdl.handle.net/10361/4321
    Abstract
    Pulsed electric field (PEF) is a new, emerging and a non thermal method of processing of food preservation technique, which uses pulsating electric field for the inactivation of microorganisms. The process causes a minimal effect on food quality characteristics such as smell, taste, color and texture. PEF can be especially used for processing liquid and semi-liquid edible food substances. Studies conducted on the energy requirements have concluded that PEF is an energy efficient process compared to the traditional thermal methods such as pasteurization. In this study the PEF was applied to various edible food items: raw milk, fruit juice, sugarcane extract and tap water. High energy electric field, ranging from 400 V/cm up to 1600 V/cm of frequency 50 Hz was applied and the corresponding microbial colony growth was counted. Here effectiveness of the AC field against the DC field was also compared; the impact of number of pulses applied and effect of thickness of the metal plates on the growth of the microorganisms were studied. The experimental results are encouraging and are supportive of the applied technique.
    Keywords
    Electrical and electronic engineering; Electric field
     
    Description
    This thesis report is submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electrical and Electronic Engineering, 2015.
     
    Cataloged from PDF version of thesis report.
     
    Includes bibliographical references (page 63-64).
    Department
    Department of Electrical and Electronic Engineering, BRAC University
    Collections
    • Thesis & Report, BSc (Electrical and Electronic Engineering)

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