turk j food agric sci Turkish Journal of Food and Agriculture Sciences 2687-3818 Burhan ÖZTÜRK 10.53663/turjfas.996406 Food Engineering Gıda Mühendisliği Efficacy of a pilot-scale ultrasonication system for pasteurization of milk https://orcid.org/0000-0001-5064-4195 Akdemir Evrendilek Gülsün BOLU ABANT İZZET BAYSAL ÜNİVERSİTESİ https://orcid.org/0000-0002-2663-5800 Bodruk Anıl Pinar Dairy Products Inc., Research and Development, Center https://orcid.org/0000-0002-9855-3409 Acar Furkan Pinar Dairy Products Inc., Research and Development, Center 12 30 2021 3 2 50 55 10 02 2021 10 27 2021 Copyright © 2019, Turkish Journal of Food and Agriculture Sciences 2019 Turkish Journal of Food and Agriculture Sciences

This study aimed to test a pilot-scale continuous ultrasonication (US) system to pasteurize whole milk in terms of physical properties, energy consumption, and inactivation of alkaline phosphatase (ALP), total mesophilic aerobic bacteria (TMAB), total coliform (TC), total enterobactericeae (TE), and Escherichia coli. Except for those treated by 90% amplitude for 20 and 30 min, the samples were found negative for ALP activity. Inactivation of TC, TMAB, TE, and E. coli rose with an increased amplitude and temperature. The maximum cost was estimated at 2.778,00 € for the system and at 3.624,00 € for plate heat exchanger to pasteurize 20.000 L of milk. 96.52% amplitude, 40 min, and 53.50 °C were determined jointly as the optimal operational settings.

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