Which of the following microorganisms is used in the production of citric acid in industries?

Lactobacillus bulgaris

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Penicillium citrinum

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Asperilligus niger

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Rhizopus nigricans

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Solution

The correct option is C Asperilligus niger
Citric acid is the most important organic acid produced in tonnage and is extensively used in food and pharmaceutical industries. It is produced mainly from different sources of carbohydrates, such as molasses and starch based media by submerged fermentation using the bacterium Aspergillus niger.

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