Food Science

Download Beverages: Technology, Chemistry and Microbiology by Alan H. Varnam PDF

By Alan H. Varnam

Beverages presents thorough and built-in assurance in a straightforward manner, and is the second one of a tremendous sequence facing significant foodstuff product teams. it's a useful studying and educating relief and is additionally of significant use to the meals and regulatory personnel.

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Additional resources for Beverages: Technology, Chemistry and Microbiology

Sample text

Direct heating by injected steam is efficient and compensates for water lost as vapour. It is sometimes considered, however, that off-taints are introduced by carry-over 38 Fruit juices from steam generation equipment and indirect heating may be preferred. In recent years the thermal load applied to single-strength citrus juice has been minimized by maintaining aseptic conditions after the initial heating. Modified ultra-heat treatment equipment can be used to 'sterilize' the juice. The vapour is flash evaporated under aseptic conditions, the cooled juice then being aseptically packed.

Juice can also be taken from the primary finisher to supply markets that require a low pulp content. (d) Pulp washing Pulp may be utilized entirely as a by-product. In many plants, however, juice is recovered from pulp by back-wash leaching. This involves mixing the pulp with water and serial passage through finishers. These are operated at very low back- pressures to prevent further disintegration of the pulp and passage into the pulp wash. 3 Information leading to the arrest ... Adulteration of citrus juice became a major problem in the late 1970s, following a steep rise in prices in 1977.

The peel pieces then pass through a series of rollers and blades, which separate the albedo from the oil-containing flavedo (outer part of rind) and expels the oil by pressure. The oil is recovered from the fInal rollers by water sprays. 34 Fruit juices collected by a manifold and flows out of the extractor. Oil cells in the skin are ruptured by the pressure exerted by the extractor cups. Oil, together with small pieces of skin, is washed off the outside of the cups and passes to the cold pressed oil recovery line.

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