Nonthermal preservation of coconut water by forward osmosis concentration and high pressure processing

IF 6 1区农林科学 Q1 FOOD SCIENCE & TECHNOLOGY

LWT - Food Science and Technology Pub Date : 2025-03-25 DOI:10.1016/j.lwt.2025.117693

Mark Emile H. Punzalan , Philipina A. Marcelo , Olga I. Padilla-Zakour

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引用次数: 0

Abstract

In this study, combined nonthermal technologies, forward osmosis (FO) and high pressure processing (HPP) were utilized to concentrate (from 6.6 to 22°Brix) and pasteurize the coconut water. These were the parameters set for each operation: FO (20 ± 1 °C, potassium lactate draw solution) and HPP (600 MPa, 2 min, 4 °C), with pH adjustment to 4.6. Total soluble solids content, pH, and water activity of the forward osmosis-high pressure processed (FOHPP) concentrate remained stable during the 18-week refrigerated storage. A significant change in color (a∗-value) in the FOHPP coconut water concentrate was observed four weeks after processing due to the presence of peroxidase and polyphenol oxidase. Microbial growth was monitored for 4 weeks at 4 °C showing no changes in aerobic plate counts, total coliforms and yeast and molds counts. A 5-log reduction was achieved for E. coli O157:H7, Salmonella and L. monocytogenes during the HPP validation. FOHPP concentrate was also acceptable in terms of its sensory properties based on the sensory evaluation results. Thus, these results indicated that nonthermally concentrated coconut water could be preserved under refrigeration for at least 1–3 months by applying FO and HPP treatments.

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来源期刊

LWT - Food Science and Technology 工程技术-食品科技

CiteScore

11.80

自引率

6.70%

发文量

1724

审稿时长

65 days

期刊介绍： LWT - Food Science and Technology is an international journal that publishes innovative papers in the fields of food chemistry, biochemistry, microbiology, technology and nutrition. The work described should be innovative either in the approach or in the methods used. The significance of the results either for the science community or for the food industry must also be specified. Contributions written in English are welcomed in the form of review articles, short reviews, research papers, and research notes. Papers featuring animal trials and cell cultures are outside the scope of the journal and will not be considered for publication.