Question

Sometimes yoghurt becomes bitter and froths up. why does this happen ??!!

Answer 1

$\bf{ANSWER}$

▪︎The culture of lactobacilli with which the yoghurt is made maybe spoilt sometimes.

▪︎Instead of lactobacilli, there is growth of harmful clostridium in such cultures .

▪︎The pH also becomes more acidic.

▪︎Such yoghurt becomes bitter and also show Frothing

Answer 2

QUESTION -

Sometimes yoghurt becomes bitter and froths up. why does this happen?

ANSWER -

During process of fermentation of milk, bacterial strains such as Lactobacillus and Bifidus — just two of the many types of lactic acid microorganisms — convert lactose sugars in milk into lactic acid.

Hence,

With such a high volume of active bacteria chugging away, the end result becomes froths up.