(DE19708181-A1)      Process for decomposing harmful substances in contaminated media during the purification of air, waste waters or soil, comprises carrying out a continuous decomposition fermentation using microorganisms present in the contaminated medium and/or added microorganism cultures. The concentration of harmful substances present in the fermenter during the decomposition fermentation is controlled by a control circuit.    Also claimed are:    (1) the formaldehyde-decomposing microorganisms DSM 11423 and DSM 11424, and the phenol decomposing microorganism DSM 11425, and    (2) the use of DSM 11423 or DSM 11424 as donor organism for genetic material, especially for insertion of a formaldehyde dehydrogenase or formaldehyde dismutase coding gene and/or the associated promoter sequence into a microorganism or cell.    USE -   The process nad microorganisms are used for eliminating harmful substances such as formaldehyde and phenolic compounds from a medium during purification of air, waste water and soil.    ADVANTAGE -   The process provides for long-term survival and growth of microorganisms which are specific to the decomposition of the substances to be eliminated, which allows continuous operation of the process for long periods and thus improves the economics of the process in terms of running costs and time.    (EP885032-A1)      Process for decomposing harmful substances in contaminated media during the purification of air, waste waters or soil, comprises carrying out a continuous decomposition fermentation using microorganisms present in the contaminated medium and/or added microorganism cultures. The concentration of harmful substances present in the fermenter during the decomposition fermentation is controlled by a control circuit.    Also claimed are:    (1) the formaldehyde-decomposing microorganisms DSM 11423 and DSM 11424, and the phenol decomposing microorganism DSM 11425, and    (2) the use of DSM 11423 or DSM 11424 as donor organism for genetic material, especially for insertion of a formaldehyde dehydrogenase or formaldehyde dismutase coding gene and/or the associated promoter sequence into a microorganism or cell.    USE -   The process nad microorganisms are used for eliminating harmful substances such as formaldehyde and phenolic compounds from a medium during purification of air, waste water and soil.    ADVANTAGE -   The process provides for long-term survival and growth of microorganisms which are specific to the decomposition of the substances to be eliminated, which allows continuous operation of the process for long periods and thus improves the economics of the process in terms of running costs and time.    (JP2000505341-W)      Process for decomposing harmful substances in contaminated media during the purification of air, waste waters or soil, comprises carrying out a continuous decomposition fermentation using microorganisms present in the contaminated medium and/or added microorganism cultures. The concentration of harmful substances present in the fermenter during the decomposition fermentation is controlled by a control circuit.    Also claimed are:    (1) the formaldehyde-decomposing microorganisms DSM 11423 and DSM 11424, and the phenol decomposing microorganism DSM 11425, and    (2) the use of DSM 11423 or DSM 11424 as donor organism for genetic material, especially for insertion of a formaldehyde dehydrogenase or formaldehyde dismutase coding gene and/or the associated promoter sequence into a microorganism or cell.    USE -   The process nad microorganisms are used for eliminating harmful substances such as formaldehyde and phenolic compounds from a medium during purification of air, waste water and soil.    ADVANTAGE -   The process provides for long-term survival and growth of microorganisms which are specific to the decomposition of the substances to be eliminated, which allows continuous operation of the process for long periods and thus improves the economics of the process in terms of running costs and time.