LACTOSE RECOVERY USING PROPANOL AS AN ANTI-SOLVENT IN ULTRASOUND ASSISTED CRYSTALLIZATION
Whey is a by-product of the dairy industry whose principal components are lactose, proteins and mineral salts. Approximately 47％ of the 115 million tons of whey produced world-wide every year are disposed-off in to rivers, lakes, or other water bodies, in wastewater treatment plants or loaded onto the land. This represents a significant loss of resources and causes serious pollution problems, since whey is a heavy organic pollutant with high biochemical oxygen demand (BOD) and chemical oxygen demand (COD). Recovery of lactose from whey solves both the problems of improving economics of whey utilization and of pollution reduction as lactose recovery itself can reduce BOD of whey by more then 80％. Sonocrystallization is the use of power ultrasound to control the crystallization process during the nucleation phase of crystallization. In the present study the process of lactose crystallization has been studied for the recovery of lactose from reconstituted lactose solution. The process has been completed rapidly with the aid of ultrasound in the presence of ‘propanol’ as an anti-solvent, at the ambient temperature (30±3℃). More than 85％ (w/w) recovery of lactose was found in 4 minutes of sonication. The spread of the crystal size distribution was found to decrease with increase in sonication time.
Lactose recovery anti-solvent sonocrystallization propanol
Sanjay R. Patel Z.V.P Murthy
Department of Chemical Engineering, S.V. National Institute of Technology Surat – 395007, Gujarat, India
国际会议
北京
英文
476-483
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）