EFFECT OF HYDROGEN PEROXIDE AND OF PERACETIC ACID IN MALTHOUSE STEEP LIQUOR

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Abstract
With the barleys examined (1954 harvest), hydrogen peroxide was a more effective germination stimulant than was peracetic acid. When steep conditions favour too rapid or excessive uptake of moisture, suitable concentrations of hydrogen peroxide improve the observed germinative energy, but peracetic acid acts as an inhibitor. With optimal water uptake conditions, neither additive affected the final count when used in a short steep. In prolonged steeps simulating commercial practice, peracetic acid was not inhibitory and hydrogen peroxide increased germinative energy, but more particularly showed its effect by stimulating germination rate and growth rate. The action of micro-flora in the steep is considered to be of minor importance.

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