Post Reply - Long Fermentation Period

   Also think about the equipment in terms of possible air inclusion from loose fittings, milk splashing into tanks, etc. Anaerobic conditions are needed generally for the starter to take off. If the starter set up (dose, temp, type)is marginal this could contribute. 

Have you spoken to your starter supplier, re suitability starter, use rate, optimum temperature? 

The solids level is very high and the high minerals level may inhibit/ slow down bacteria growth due to high osmotic value. 