(NL1000736-C2)      Alkylene amine acetates (A) are degraded under alkaline conditions using microorganisms present in activated sludge, by contacting waste contg. (A) at pH 9 with sludge contg. a wide range of microorganisms, in the absence of carrier materials.    USE -   (A) comprises ethylene diamine tetraacetate (EDTA), propylene diamine tetraacetate (PDTA) and/or other cpds. e.g. N,N-bis(2-(bis(carboxymethyl)amino)ethyl)glycine (pentetic acid).    ADVANTAGE -   Degradation of EDTA in waste water using microorganisms from sewage sludge is known (Gschwind, GWF Gas-Wasserfach: Wasser/Abwasser Vol.133, 10 (1992), 546-549), but a carrier is required and the pH is limited to 9-9.5. The present method operates at pH 8-9, without need of a carrier and can take place at normal water treatment plant temp., e.g. 10-38 C.    (EP836584-A1)      Alkylene amine acetates (A) are degraded under alkaline conditions using microorganisms present in activated sludge, by contacting waste contg. (A) at pH 9 with sludge contg. a wide range of microorganisms, in the absence of carrier materials.    USE -   (A) comprises ethylene diamine tetraacetate (EDTA), propylene diamine tetraacetate (PDTA) and/or other cpds. e.g. N,N-bis(2-(bis(carboxymethyl)amino)ethyl)glycine (pentetic acid).    ADVANTAGE -   Degradation of EDTA in waste water using microorganisms from sewage sludge is known (Gschwind, GWF Gas-Wasserfach: Wasser/Abwasser Vol.133, 10 (1992), 546-549), but a carrier is required and the pH is limited to 9-9.5. The present method operates at pH 8-9, without need of a carrier and can take place at normal water treatment plant temp., e.g. 10-38 C.    (EP836584-B1)      Alkylene amine acetates (A) are degraded under alkaline conditions using microorganisms present in activated sludge, by contacting waste contg. (A) at pH 9 with sludge contg. a wide range of microorganisms, in the absence of carrier materials.    USE -   (A) comprises ethylene diamine tetraacetate (EDTA), propylene diamine tetraacetate (PDTA) and/or other cpds. e.g. N,N-bis(2-(bis(carboxymethyl)amino)ethyl)glycine (pentetic acid).    ADVANTAGE -   Degradation of EDTA in waste water using microorganisms from sewage sludge is known (Gschwind, GWF Gas-Wasserfach: Wasser/Abwasser Vol.133, 10 (1992), 546-549), but a carrier is required and the pH is limited to 9-9.5. The present method operates at pH 8-9, without need of a carrier and can take place at normal water treatment plant temp., e.g. 10-38 C.    (JP11508485-W)      Alkylene amine acetates (A) are degraded under alkaline conditions using microorganisms present in activated sludge, by contacting waste contg. (A) at pH 9 with sludge contg. a wide range of microorganisms, in the absence of carrier materials.    USE -   (A) comprises ethylene diamine tetraacetate (EDTA), propylene diamine tetraacetate (PDTA) and/or other cpds. e.g. N,N-bis(2-(bis(carboxymethyl)amino)ethyl)glycine (pentetic acid).    ADVANTAGE -   Degradation of EDTA in waste water using microorganisms from sewage sludge is known (Gschwind, GWF Gas-Wasserfach: Wasser/Abwasser Vol.133, 10 (1992), 546-549), but a carrier is required and the pH is limited to 9-9.5. The present method operates at pH 8-9, without need of a carrier and can take place at normal water treatment plant temp., e.g. 10-38 C.    (US5965024-A)      Alkylene amine acetates (A) are degraded under alkaline conditions using microorganisms present in activated sludge, by contacting waste contg. (A) at pH 9 with sludge contg. a wide range of microorganisms, in the absence of carrier materials.    USE -   (A) comprises ethylene diamine tetraacetate (EDTA), propylene diamine tetraacetate (PDTA) and/or other cpds. e.g. N,N-bis(2-(bis(carboxymethyl)amino)ethyl)glycine (pentetic acid).    ADVANTAGE -   Degradation of EDTA in waste water using microorganisms from sewage sludge is known (Gschwind, GWF Gas-Wasserfach: Wasser/Abwasser Vol.133, 10 (1992), 546-549), but a carrier is required and the pH is limited to 9-9.5. The present method operates at pH 8-9, without need of a carrier and can take place at normal water treatment plant temp., e.g. 10-38 C.