I don't sure where to start, hope you can help me to get some ideas

Prepare an indicative mass balance for all process streams, for the production of WPC from white cheese whey by the two methods (and using favored method of precipitation), stating all assumptions. Note: Use the following table from the review as a composition. Base the mass balance on the process flow diagram separations and the composition of Whey. Table 1 Whey composition (Tsakali et al., 2010)