Application of different processes for the biodegradation of 1,3-dichloro-2-propanol by the bacterium Pseudomonas putida DSM 437

• 1,3-Dichloro-2-propanol (1,3-DCP), is a highly toxic compound used in many industrialprocesses. Biodegradation of 1,3-DCP, by the bacterial strain Pseudomonasputida DSM 347, was studied applying three different processes. A number of combinations,with respect to glucose and 1,3-DCP concentration were examined during batchprocess. When the initial concentration of 1,3-DCP was 600 mg L–1 in the presence of400 mg L–1 glucose, the biodegradation degree and rate were 10.8 % and 0.68 mg L–1h–1 respectively. 1,3-DCP biodegradation by the resting cells of P. putida DSM 347 wastested at mass concentrations from = 200 to 1 000 mg L–1 using biomass concentrationof 5 g dry cell mass L–1. Biodegradation of 1,3-DCP ranged from 84 to 90 %, initialbiodegradation rates ranged from r = 2.36 to 10.55 mg L–1 h–1, while dependence of bothparameters from the initial concentration of halohydrin was observed. A system of twoContinuous Stirred Tank Reactors (CSTRs) in series was developed for the biodegradationof a highly toxic stream of 1,3-DCP (2000 mg L–1). The overall biodegradationdegree of the system was 68 %, while biodegradation rates of the first and secondbioreactor were r = 2.88 and 5.21 mg L–1 h–1 respectively.

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