Abstract: Bisphenol A (BPA) is an environmental hormone polluting widely. The bacterial strains degrading BPA were isolated from its deeply polluted soil. By acclimation, their capacities for the degradation of BPA were enhanced. The strain that had the best degradation capacity was selected. It was identified as short bacillus according to its morphological character. By tests in shaking flasks, the effects of the conditions of the growth were studied, and the optimum conditions of the growth of the strain were: pH=4, NH₄Cl=4.12 mg/L, KH₂PO₄=0.946 4 mg/L, the best bacterial addition amount was 5%, the degraded ratio of BPA reached 71.79% after degradation for 8 days at concentration of 50 mg/L in solution.

Key words: environmental hormone, Bisphenol A, biodegradation, characteristic of degradation