Abstract

Nowadays, the reduction of food waste, as well as protection of the nutritional value, are significant trends in domestic and catering food processing. Among the trends are innovations in food technology like sous-vide. The aim of this study was to evaluate the effect of sous vide cooking on the technological, nutritional, and microbiological quality of the chicken breast as well as to compare it to conventional methods (boiling and steaming). Meats after low-temperature sous-vide heat treatment were characterized by a significantly higher yield (p ≤ 0.05) and water content than those prepared with conventional methods. The energy and time consumption of sous-vide preparation was 5–10 times higher than other methods. The examined heat treatments resulted in a good microbiological quality of samples. The nutritional value of sous-vide products depended on the process parameters. A higher temperature and sous-vide processing time resulted in a higher content of dry matter, protein, and fat in the meat and was close to that of conventional methods. Low parameters of the process resulted in the least changed profile of fatty acids in meat. The use of the sous-vide method protects the nutritional value and allows for the extension of the shelf life of the meat which ultimately reduces food waste. The sous-vide heat treatment method is more suitable for foodservice than use in home conditions because of high energy consumption, despite the protection of nutrition value.

Highlights

  • According to FAO [1], more than one-third of food produced for human consumption is wasted, and the a significant share is ascribed to households

  • The total energy consumption of the sous-vide method increased with an increase of the applied temperature from 64 to 75 ◦C (0.548–0.743 kWh)

  • Chicken breasts processed with the sous-vide method were characterized by a significantly higher yield (p ≤ 0.05) and water content than those processed by boiling and steaming in a pot, as well as good stability of microbiological quality for up to 10 days of storage

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Summary

Introduction

According to FAO [1], more than one-third of food produced for human consumption is wasted, and the a significant share is ascribed to households. Households (47 million tons, over 50%), processing (17 million tons, 19%), and food services (11 million tons, 12%) are major contributors of EU food waste [2]. The hospitality and food service sector has been identified as a branch of the food industry with great potential for food waste prevention [4]. According to several studies [5,6], the most common causes of food waste are food spoiling and expiration dates not noticed, as well as consumer difficulty in distinguishing between and properly understanding the terms “use by” and “best before” on the label. In households and food service, besides the trimming losses, a great share of initial weight is lost during heat treatment [7]

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