Dynamic of Bisphenol A biodegradation in laboratory conditions

Plenty of synthetic substances including multi-component petroleum products, persistent organic pollutants (POP), pharmaceutical metabolites, must be removed both from the soil, fresh and ground-water. Presence of POP's lead to degradation of multi-species water or soil ecosystems. Many toxic substances are spread in environment by daily activity of common people. Simple shopping generates only some shop receipts for each family or simple man. Due to common use of thermal paper for electronic cash confirmations or shop recipe printouts, some toxic compounds including Bisphenol A is transferred to environment and human bodies. The aim of this study was to compare the pos-sibilities of microbiological degradation of Bisphenol A by Bacillus thuringiensis and Aspergillus niger in laboratory test. The degradation tests have been carried for 10 d in the dark and temperature of 20?. Two growth mediums were tested. Shredded shop recipes (1:50 m/m) was enriched by 0.2 g of bacteria B. thuringiensis powder or 0.2 g of fungi A. niger powder and incubated with rotation. Content of Bisphenol A (BPA) was determined with gas chromatography with mass spectrome-ter (GC-MS/MS) method. Low amounts of BPA were decomposed in both mediums. Degradation of BPA was weak in case of both tested organisms and not exceed 67% after 10 d.