Problem In a Casein factory (see Fig.2.3), the entering coagulum containing casein and lactose is passed through two coo

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Problem In A Casein Factory See Fig 2 3 The Entering Coagulum Containing Casein And Lactose Is Passed Through Two Coo 1 (140.72 KiB) Viewed 19 times

Problem In a Casein factory (see Fig.2.3), the entering coagulum containing casein and lactose is passed through two cookers and acidified to remove the casein. The casein separates as a curd. The curd is removed from the whey by screening, and then washed, pressed and dried. The casein fines are removed from the pressed whey and the wash water by hydro cyclones, and mixed with the heated coagulum just before screening. The cycloned whey is used for heating in the first cooker and steam in the second cooker by indirect heating. Coogulum 49,600 kg/h Whey 39,460 kg/h Cooking Fresh wash water 18,694 kg/h Cooking 2 Steam Acidu- lotion Dewheyed Screening curd Washing Pressing Drying Dried product Row whey 41360 kg/h Wash water 27772 kg/h Fines mu Hydro- cyclones Hydro- cyclones Moisture in spent dryer air Whey (cycloned 39,460 kg/h Whey fines stream Woste wash water 25.572 kg/h Assuming lactose is completely soluble in all solutions and concentrations in fines and waste streams from hydrocyclones are the same; set out a complete materials balance for the process, and answer the following questions: a) What was the composition of the wet curd? b) What was the composition of the final product? c) What is the yield of the casein from the coagulum entering, and the losses in the cycloned whey and waste water? Useful Data %Composition on Wet Weight Basis Casein Lactose Coagulum 2.76 3.68 Raw whey from screening 0.012 3.85 Whey (cycloned) 0.007 0.026 0.8 Waste wash water 0.008 Wash water The moisture of the final dried product was 11.9%