Abstract: Method that allows surfaces in interior spaces or technical equipments to be cleaned, characterised in that it comprises at least the following step: —the targeted atomization on the surfaces of a liquid with spores of benign bacteria on all or certain types of surfaces by means of an electrically and/or pneumatically powered atomizer, while the space remains accessible to people and animals, with the purpose of speeding up the cleaning of interior spaces and of technical equipments, lowering the cleaning frequency, and lowering the dust deposit.

Abstract: Method that allows surfaces in interior spaces or technical equipments to be cleaned, characterised in that it comprises at least the following step: —the targeted atomization on the surfaces of a liquid with spores of benign bacteria on all or certain types of surfaces by means of an electrically and/or pneumatically powered atomizer, while the space remains accessible to people and animals, with the purpose of speeding up the cleaning of interior spaces and of technical equipments, lowering the cleaning frequency, and lowering the dust deposit.

Abstract: Method for removing all types of particulate matter with exclusion of biological multiplying microorganisms in indoor environments characterized by comprising the following two steps:—the atomization of compounds that oxidize particulate matter to form complexes and to precipitate them;—the atomization of a liquid containing a mixture of spores of Gram-positive aerobic and/or of facultative anaerobic spore formers to act as nuclei for extra precipitation, to cover the precipitated particulate matter; and to metabolize precipitated particles and to take up precipitated particles by the Gram-positive bacteria/thereby preventing the precipitated particles to become airborne again;—whereby the drop size in both atomization steps is held between 5 and 50 ?m to yield a dry nebula.

Abstract: Method for removing all types of particulate matter with exclusion of biological multiplying microorganisms in indoor environments characterized by comprising the following two steps:—the atomization of compounds that oxidize particulate matter to form complexes and to precipitate them;—the atomization of a liquid containing a mixture of spores of Gram-positive aerobic and/or of facultative anaerobic spore formers to act as nuclei for extra precipitation, to cover the precipitated particulate matter; and to metabolize precipitated particles and to take up precipitated particles by the Gram-positive bacteria/thereby preventing the precipitated particles to become airborne again;—whereby the drop size in both atomization steps is held between 5 and 50 ?m to yield a dry nebula.