Abstract
Ultrafiltration (UF) technology was used for the production of shrikhand, a fermented dairy product from pre-concentrated skim milk. For UF of skim milk, an indigenously made UF pilot plant was used. Membrane used in the plant was modified polysulphone and of Spirally Wound configuration. Mode of operation was batch type. UF plant was operated at different feed temperature and transmembrane pressure for studying flux variations. The permeation rate was more at higher feed temperature and lower transmembrane pressure. Skim milk was concentrated front 11% to maximum 20% total solids and was used in curd making and then shrikhand, making. The quality of shrikhand, made from lower concentration UF-concentrated skim milk (I I to 14% total solids) was good in texture and viscosity and was rated close to conventional shrikhand, while use of higher concentration (20 to 22% total solids) resulted in sandiness and lacked viscosity.