Review article

New Perspectives for Citric Acid Production and Application

Carlos R. Soccol ; Bioprocess Engineering and Biotechnology Division, Department of Chemical Engineering, Federal University of Paraná, Curitiba-PR, Brazil
Luciana P. S. Vandenberghe ; Bioprocess Engineering and Biotechnology Division, Department of Chemical Engineering, Federal University of Paraná, Curitiba-PR, Brazil
Cristine Rodrigues ; Bioprocess Engineering and Biotechnology Division, Department of Chemical Engineering, Federal University of Paraná, Curitiba-PR, Brazil
Ashok Pandey ; Biotechnology Division, Regional Research Laboratory, CSIR, Trivandrum 695 019, India

Abstract

There is a great worldwide demand for citric acid consumption due to its low toxicity when compared with other acidulants used mainly in the pharmaceutical and food industries. Other applications of citric acid can be found in detergents and cleaning products, cosmetics and toiletries, and other. Global production has now reached 1.4 million tonnes and there is annual growth of 3.5–4.0 % in demand/consumption of citric acid. As a result of the adverse market conditions, only big producers have survived. Any increase in citric acid productivity would be of potential interest and hence there is an obvious need to consider all possible ways in which this might be achieved. The production by submerged fermentation is still dominating. However, solid-state processes can create new possibilities for producers. Many by-products and residues of the agro-industry can be used in the production of citric acid. A cost reduction in citric acid production can be achieved by using less expensive substrates. The use of agro-industrial residues as support in solid-state fermentation is economically important and minimizes environmental problems. Other perspectives for citric acid production sector are the improvement of citric acid producing strains, which have been carried out by mutagenesis and selection.

Keywords

citric acid; submerged fermentation; solid-state fermentation; agro-industrial residues

Hrčak ID:

109832

URI

https://hrcak.srce.hr/109832

Publication date:

15.6.2006.

Article data in other languages: croatian

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