Lecture_23___byproduct_utilization

Lecture_23___byproduct_utilization - 1 Byproduct...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 Byproduct Utilization in the Dairy Industry Carmen I. Moraru Cornell University Casein and caseinates- Casein, the major protein in cows milk, is isolated from skim milk and used as an ingredient in the food industry and chemical industry - Types of casein available commercially:- Rennet casein , obtained by enzymatic precipitation - Acid casein , obtained by acidifying skim milk to the isoelectric point - Micellar casein, obtained by membrane separation- Other protein preparations that contain casein:- Caseinates , commonly sodium caseinate, obtained from acid casein dissolved in sodium hydroxide. Potassium and calcium caseinates are also available.- Co-precipitate , obtained by heating skim milk at high temperatures and then precipitating the casein/whey protein complex, usually with calcium chloride. 2 Rennet casein - flow diagram Renneting Cooling Pasteurization 72C / 15 20 s Stirring & Cooking Draining Drying 60C / 30min I st stage: 5055C; II nd stage: 65 C ~ 12% moisture Grinding 15-20 min Rennet casein powder Coagulation Skim milk Packing 30C Chymosin 2-3 steps, at 45 - 60 C Washing Draining Specifics of rennet casein manufacture- Heating/cooking of the coagulated casein is necessary in order to deactivate the enzyme (rennet). deactivate the enzyme (rennet)....
View Full Document

This note was uploaded on 05/02/2009 for the course FDSC 4250 taught by Professor Moraru during the Spring '09 term at Cornell University (Engineering School).

Page1 / 6

Lecture_23___byproduct_utilization - 1 Byproduct...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online