Abstract: A method for processing protein-containing materials and utilization of protein-containing waste for production of mixtures of natural amino acids, mixtures of low-molecular weight peptides, and mixtures of oligopeptides, which can be used in the manufacture of reagents for the detoxification and bactericidal treatment of sewage sludge, surfactants, wetting agents, foaming agents, detergents and cleaners. The method includes processing protein-containing waste by hydrolysis with aqueous solutions of alkalis with additives in the form of ammonium salts of organic and mineral acids introduced into the reaction mixture of these components, and the wastes are processed in the mixture with water, alkali and additive, in the ratio of 1:(0.3-1.5):(0.03-0.45):(0.01-0.2), at 100-110° C. for 20-60 min.

Abstract: The invention relates to antimicrobial compositions that can be used for disinfecting and can be applied in various aspects of the national economy, medicine, and laboratories of all types. The antimicrobial compositions comprise a chelating metal complex compound with a monodentate bidentate or polydentate ligand that exhibits affinity to hydrogen ion, an ionogenic surfactant, and a solvent. The compositions of the invention display antiseptic properties. The antimicrobial compositions are active against Gram-positive and Gram-negative bacteria, fungi, viruses, and spores, and can be applied in a broad temperature interval. Methods of using the compositions of the present invention in the treatment and prevention of diseases caused by a variety of pathogens are further provided.