NOVELTY - Biocatalyst from mixed layer clay mineral complex with addition or intercalation of thiocyanate and/or selenocyanate and/or selenite, is claimed.    USE - The mixed layer clay mineral complex is useful as catalyst for inactivating toxins, preferably mycotoxins and environmental toxins and in organic synthesis. The biocatalyst is useful: for increasing the methane yield; reducing the ammonium concentration; improving the maintainability of the digestate in biogas plant; and for the enzymatic conversion of biomass (liquid manure, maize silage, cereal and food residues) to biogas (where 0.1-10% of the biocatalyst is mixed to the biomass before the fermentation); for preventing pancreatic acidity in cattle; for pregnant and/or lactating animals for increasing the birth weight and/or for improving the body's defense mechanism of the progeny; and for stimulating the immunity and/or decreasing the diseases in larger animal population. The biocatalyst and/or the combination are useful: as feed additives and/or as dietary supplement for farm animals (where 0.1-10% of the biocatalyst is mixed in 2% of the fodder); for promoting planting in arid area, preferably for water storage in root regions and for decreasing salting; and for conditioning of fermenting digestate of biogas production. The combination is useful: for the adsorption and degradation of toxic materials; for the degradation of pollutants; for increasing the metabolic activity of the cells; for improving the health of animals, where the biocatalysts are added to the animal fodder and are eliminated in large amount in the excrement, so the stable climate is improved, which decreases bad smell, the waste products are conditioned and stored for nitrogen fertilization; for preventing washing out of fertilizers; for water storage in the root region; as selective carriers for microorganisms; as culture and planting substrates and for improving the soil used for agricultural or gardening; and/or as soil improving agent and cultural substrates for supporting the plant growth (all claimed).    ADVANTAGE - The biocatalyst shows high catalytic activity, flexible porous structure and variable porous volumes and less substrate specificity in different areas of application e.g. in biogas production and in the plant production.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a combination (I) comprising the biocatalyst, thiocyanate of biogenic origin and/or a thiocyanate precursor available from plants from the family Brassicaceae, preferably Brassica napus (rapeseed), glycerin, biomass from terrestrial fungus, which are transformed under the addition of thiocyanate into micro- and nano-particles having an average diameter of 10 nm to 10 mu m, pectinase, pectin-esterase or enzyme combinations that disintegrate the cell wall protecting substances of plant cells, and/or mineral material premix for animal nutrition; (2) a combination (II) comprising the biocatalyst, acrylamide/acrylic acid-copolymers and/or quaternary ammonium compounds, like poly-dimethyl-diallyl-ammonium chloride; (3) producing the biocatalyst, comprising adding the raw materials rich mixed-layer, water and inorganic thiocyanate and/or selenocyanate as dispersing agents, in a concentration of 0.05-1%, preferably less than 0.1%, into a homogeneous suspension and flocculating by the further addition of the dispersing agent with a concentration of 5%, preferably 2-3%; (4) producing the quartz poor biocatalyst, preferably for further processing the biocatalyst as colloids and/or as nano-particles, comprising separating a fraction having a grain size of greater than 2 mu m from the dispersed raw material rich mixed-layer by hydro-cyclone separation and flocculating the fraction having the grain size of greater than 2 mu m in the suspension; (5) preparing the combination (II), comprising mixing biomass obtained from thiocyanate and/or thiocyanate precursor from rapeseed with the biocatalyst and converting to rape expellers and/or to other feedstuffs; and (6) a depot fertilizer comprising the biocatalysts.