Abstract: A fermented material included stalk particles of monocotyledonous flowering plants which can constitute a sustainable, ecofriendly & bio-sourced material. More particularly, the fermented material includes stalk particles of monocotyledonous flowering plants and at least one filler (clay), wherein: (a) the particles have a size given by their greatest dimension Dg, in mm such as: Dg?30; (b) the specific density Ds of the material, in g dry matter per liter such as 100?Ds?250; (c) the specific water content Cw of the material is, in % by mass such as 55?Cw?95; and the carbon/nitrogen ratio C/N of the material is such as 60?C/N. A method is provided for the production of this fermented material.

Abstract: The method of the invention comprises the following steps: (i) cutting the maize stalks so as the less leafy stalk segments, higher than 70 cm, stay on the field; (ii) cutting the less leafy stalk segments as close to the ground as possible; (iii) harvesting the less leafy stalk segments cut in step (ii); (iv) cutting the in step (iii) harvested less leafy stalk segments into 5-50 mm stalk sections; (v) providing a mechanical impact to the stalk sections of step (iv) to obtain a mix containing: f1. said spongy cores forming the superabsorbent pellets fraction, f2. said elongated fiber pieces forming the fibrous matter fraction, f3. and said leaf matter forming the leafy fraction, (vi) separating the 3 fractions from each other; (vii) recovering the three fractions f1-f2-f3; The invention also pertains to the so obtained products and to their uses in treatments of liquids or gases.