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I. Introducción 29
3. VEGETABLE MILK PROCESSING
Industrial vegetable milk processing is based on five main steps:
grinding, water extraction, filtration, homogenisation and pathogen removal
treatment. Nevertheless, depending on the raw material and the desired final
product characteristics, the process slightly differs. Thus, the processing is
subsequently explained separately, taking into account the different groups of
these abovementioned milks commented.
3.1 Cereal milk processing
A typical flow diagram of cereal milk processing is shown in Figure 1.
Before going through the extraction procedure, cereals are conditioned: this
mostly refers to husking, washing and grain classification. Pre-conditioning is
a requisite for Quinoa grain due to its saponins contents (toxic in high
amounts and imparts a bitter taste). Mechanical abrasion and/or washing are
sufficient to remove this unwanted compound (Brady et al., 2007).