Abstract
Nowadays, the development of environmentally-friendly packaging materials is relevant worldwide. Biodegradable packaging materials are promising due to their safety and ability to extend shelf life of food products. This study aimed to investigate the properties of biodegradable film based on a bacterial exopolysaccharide (xanthan) with the view to extend the quality and shelf life of chilled meat products. We studied pork and carp samples packed in biodegradable film and stored at 0–2°C. Biodegradable packaging had positive effects on sensory, physicochemical, and microbiological parameters, as well as on ecological safety of the raw materials. During storage of packed chilled pork, its mass loss decreased from 2.16 to 0.21% (norm to 0.30%), and water activity reduced from 0.985 to 0.960, which had a positive effect on the microbiological resistance of pork during storage. The use of biodegradable film contributed to the preservation of quality and freshness of carp, which was confirmed by sensory and microbiological indicators. Total microbial contamination in carp packed in biodegradable film was significantly lower than that in unpacked samples, which extended its shelf life for one day compared to control. Biodegradable packaging also allowed mass loss and pH value to decrease during storage and inhibited oxidation processes in the samples under study. Free fatty acid content decreased by a factor of two, and peroxides, by 7%. Thus, biodegradable films can be effective film coatings to use in the food industry. This method of packaging not only preserves the functional and technological properties of food products, lowers their mass loss, and extends their shelf life, but also reduces costs and is environmentally friendly.
Highlights
Among the fundamental principles of raw materials and foods quality are their safety, sustainability, and long-term nutritional value [1, 2, 14].One of the promising directions in addressing the global pollution of human habitat by polymer waste is to create environmentally safe packaging [3, 4]
Our aim was to study sensory, physicochemical, and microbiological parameters, as well as environmental safety and storage time of meat and fish raw materials packed in biodegradable film based on exopolysaccharide of bacterial origin
We aimed to develop and investigate eco-safe packaging, namely bactericidal biodegradable film based on bacterial exopolysaccharide to extend the shelf life of animal raw materials
Summary
One of the promising directions in addressing the global pollution of human habitat by polymer waste is to create environmentally safe packaging [3, 4]. Much attention is paid to the development of biodegradable and edible packaging materials which simplify product dosing and portioning without polluting the environment [5,6,7]. Polysaccharide-based films protect raw materials and food products from mass loss (due to reduced moisture evaporation rate) and from the penetration of oxygen and other substances. As a result, it slows down the changes in the product quality [8, 9]
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