Abstract: The present invention relates to a novel process for the ozone treatment of unground plant materials such as wheat grains. According to the invention, this process consists in allowing the plant material to stand for at least one day after a prehumidification followed by an ozonization involving a complementary humidification that adds from 3 to 10% by weight of water, based on the dry weight of the plant material. This process is applied especially to wheat grains. In this case, a process according to the invention that enables the ozone to reach the core of the grains is carried out in order to manufacture so-called “technological” flours. The physical and chemical properties of such flours, observed as a function of the parameters of the ozonization process, are presented.

Abstract: The present invention relates to a method for making flours having a high food safety level comprising the grinding of grains previously cleaned and moistened, characterized in that, prior to or simultaneously with said grinding, said grains are brought into contact with ozone produced from a carrier gas, preferably in a quantity of between 0.5 and 20 expressed in grams of ozone per kilo of grains.

Abstract: The invention relates to a process for the preparation of lignocellulosic substrates having a high digestibility. This process consists in bringing said lignocellulosic substrates, which have been ground beforehand and optionally moistened in the case of dry substrates, in a stirred reactor, into contact with ozone produced from a carrier gas, the ozone being present in the carrier gas in a concentration of between 80 and 200 g/m3 NTP, with a residence time of between 8 and 40 min in said reactor.

Abstract: The present invention relates to a method for making flours having a high food safety level comprising the grinding of grains previously cleaned and moistened, characterized in that, prior to or simultaneously with said grinding, said grains are brought into contact with ozone produced from a carrier gas, preferably in a quantity of between 0.5 and 20 expressed in grams of ozone per kilo of grains.