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Current Pharmaceutical Biotechnology

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ISSN (Print): 1389-2010
ISSN (Online): 1873-4316

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Research Article

Preparation of Sterile Raw Material - Chicken Eggshells in the Process of their Transformation into Selected Calcium Salts

Author(s): Wioletta Siemiradzka*, Barbara Dolińska and Florian Ryszka

Volume 22, Issue 2, 2021

Published on: 03 September, 2020

Page: [299 - 304] Pages: 6

DOI: 10.2174/1389201021666200903120835

Price: $65

Abstract

Background: The chicken eggshells and their subcrustal membranes are a valuable source of calcium, but they are not further processed but disposed of as waste from the food industry. Chicken eggshells have high content (>95%) of calcium carbonate. Some properties suggest that eggshells may be a promising alternative to the present calcium sources used in the pharmaceutical industry.

Methods: The effect of roasting chicken eggshells with a selected organic acid (citric or fumaric or lactic acid) on microbiological purity, including the presence of fungi and bacteria Salmonella spp., Staphylococcus aureus, Escherichia coli of obtained calcium salts, was investigated. In this study, chicken eggshells were subjected to chemical reactions with organic acids (citric, fumaric or lactic acid) at two different calcium-acid molar ratios (1:1 or 1:3) and the mixture was heat-treated for 1 or 3 hours at a temperature of 100°C or 120°C.

Results and Discussion: It was found that lactic acid was 100% effective against fungi, and the remaining citric and fumaric acids were -50% (regardless of the other examined conditions). The type of acid used has a significant effect on fungal growth inhibition (p<0.05). Fumaric acid and lactic acid will be nearly 100% effective against bacteria (100% fumaric acid and 97% lactic acid effectiveness), regardless of other factors.

Conclusion: Lactic acid is the most effective against pathogenic flora - fungi and bacteria. The transformation of chicken eggshells into calcium lactate can provide us with sterile calcium salt, free of 100% fungi and 97% of all bacteria.

Keywords: Chicken eggshells, sterilization, calcium salts, supplementation, chemical reactions, food industry.

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