{"id":26066,"date":"2024-09-19T19:22:51","date_gmt":"2024-09-19T11:22:51","guid":{"rendered":"https:\/\/thefooduntold.com\/?p=26066"},"modified":"2024-09-19T19:22:55","modified_gmt":"2024-09-19T11:22:55","slug":"ohmic-heating-joule-heating-of-food-how-does-it-work","status":"publish","type":"post","link":"https:\/\/thefooduntold.com\/food-science\/ohmic-heating-joule-heating-of-food-how-does-it-work\/","title":{"rendered":"Ohmic Heating (Joule Heating) Of Food: How Does It Work?"},"content":{"rendered":"\n
\"Ohmic<\/figure>\n\n\n\n

Ohmic heating, also called Joule heating, is one of the few food processing methods that uses electricity. James Prescott Joule discovered that electricity gives off heat, and this heat is produced from resistance (ohms) in 1841. To put it simply, electricity is converted into heat energy. This discovery has led to believe that this process can be used to process and preserve food. <\/p>\n\n\n\n

This has turned into fruition when Ohmic heating was used to pasteurize milk in the late 19th century. <\/strong>The process involved flowing milk between two plates of different electric voltages. At the turn of the 20th century, progress in Ohmic heating was considerably limited though.<\/p>\n\n\n\n

This was due to various reasons, mainly technological constraints (lack of suitable electrode materials), lack of the understanding of the process, and financial considerations. In 1930s, the process was called \u201cElectro-Pure\u201d. In the 1950s, a process of sterilizing milk using Ohmic heating was developed. However, the process was discontinued because of the high operational costs and the excessive use of electricity.<\/p>\n\n\n\n

Interest in Ohmic was revisited in the 1980s because there was a need for a process that could efficiently sterilize liquid\u2013large particle mixtures. Today, Ohmic heating has become an attractive option for food manufacturing. This is in large part of the unending research and study about the technology. <\/p>\n\n\n\n

Let’s discuss Ohmic heating further.<\/p>\n\n\n\n

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Table of Contents<\/p>\n