Abstract: The invention relates to a method of controlling microorganisms adhered to surfaces in biological material, by administering substances which alter the water-structure binding capacity of surfaces and phase-boundaries.To remove micro-organisms from the surfaces, organic and inorganic salts are used in combination with organic polymers, preferably biopolymers, with positively and/or negatively charged groups such as amino groups and carboxyl groups.The invention also relates to compositions and preparations for performing the method, e.g. ointments, pastes and washing liquids containing the above-mentioned substances, as well as toothpaste containing one or more organic or inorganic salts together with the above-mentioned polymers.

Abstract: The present invention relates to a method of controlling microorganisms adhering to the surfaces of biological material, by the administration of substances which alter the water-structure binding capacity of the surfaces and phase-boundaries.Organic and inorganic salts, erythrosine or anti-oxidants are used to remove micro-organisms from the surfaces. Cucumine or derivatives thereof are used as adhesion-stimulating substances.The invention also relates to preparations for performing the method, such as ointments, creams and bathing liquids containing the above-mentioned substances, as well as to dentifrices containing one or more organic or inorganic salts.

Abstract: Method for producing methane by first heating and mixing an organic substrate to 70.degree. C. and cooling same with fresh substrate to 50.degree.-60.degree. C. in an antechamber, transferring same to a processing chamber in the presence of methane-producing anaerobic microorganisms and therein cultivating the substrate under anaerobic conditions to produce methane.

Abstract: Production of methane from a substrate comprising an organic material, by way of example in a process by means of a culture of anaerobic and preferably thermophile microorganisms, which in a processing chamber (8) is brought into contact with the organic material and in which the generated gas is collected. The substrate is introduced into an ante-chamber (7) for pretreatment which is provided with a heating device (28) with the substrate heated in the ante-chamber to at least the temperature that it is intended to have during the process or preferably to a higher temperature, whereafter it is transported to said processing chamber (8) to be brought into contact with the culture of microorganisms.