Various factors affect the fermentation process such as temperature, pH, acidity, ethanol, and the availability of nutrition.Temperature - The temperature required depends on the type of microbe. The lactic acid bacteria require higher temperatures than yeast. The temperature should be above 18°C to allow the growth of bacteria.pH - The optimum pH for the growth of microbes depends on the type of strain. Ph electrode is used to detect the fermentation process, which is continuously used to measure and record the ph change.