Question

Why does curd sometimes turn bitter

Answer 1

Curd can taste bitter sometimes if the the fermentation is in excess than the required amount.During the fermentation process the lactose present in the milk is converted to lactic acid under ambient environmental conditions.When the optimum consistency isreached it has to be refrigerated to stop the fermentation ...
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Answer 2

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Curd is form when lactobacillus bacteria reproduce. if the curd is not transferred to cool place then curds turns sour because the bacteria continue to multiply and produce more latic acid