Scientific, information & consultancy services for the food industry

Determination of theoretical yield and process efficiency for Cottage Cheese

As more pressure is applied to reducing production costs, attention is increasingly being given to maximising the yield of high moisture cheeses including Cottage cheese. While yield is important, cheese quality must also be considered whenever attempts are being made to improve or optimise yield.

Considerable academic and commercial research has been devoted to optimising the yield of un-dressed or un-creamed Cottage cheese. There is now a significant volume of academic research freely available or available at low cost (on line databases may require payment by credit card to access some journal articles); this is easy to access. Commercial information of varying quality, some of it surpassing what is available in the research literature, is also available but this is difficult to access.

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Case study-reduced cheese yields in a commercial Cheddar cheese factory

Case study

This section contains the results of an actual investigation of an apparent reduction in the yield of Cheddar cheese made in October of year X compared with the same month a year previously. 

Five  vats of cheese were manufactured in the factory and the milk and cheese were subject to chemical analysis. The samples were analysed at a reputable laboratory.

The following data (Table 1) for milk, cheese and yield (adjusted per 100 kg of milk) were obtained.

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How do you investigate and solve commercial yield problems?

This section of the Dairy Science and Food Technology website provides an outline of how the commercial 'cheese yield problem' outlined earlier might be approached and how yield and cheese component retention can be analysed and presented. This is achieved using a unique on-line calculator that is shown in the cheese yield spreadsheet.

Data from 5 vats of commercial Cheddar production are summarised in the cheese yield spreadsheet. The data set are different to the problem given previously. The cheese and milk data were obtained from one day's production. The casein:fat ratio of milk in each vat has been calculated and for information casein as a percentage of protein has been presented.

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