Influence of bisphenol A occurrence in wastewaters on biomass characteristics and activated sludge process performance

In this work, the influence of bisphenol A (BPA) on biological wastewater treatment was studied. For it, two sequencing batch reactors (SBRs) were operated for three months. Both SBRs fed with synthetic (SW), adding 1 mg·L−1 BPA into feed reactor SBR-BPA, while other one without as a control (SBR–B). addition, experiments performed adapted and non-adapted activated sludge, simulating reaction step to determine pathways removal. Results showed that adsorption biodegradation only significant removal routes. by more efficient when biomass used in tests (32.2% 8.2% biomass, respectively), route similar both types sludge (around 40%). Regarding experiments, after 16 days no concentration detected SBR-BPA effluent. adaptation process, sensitive low temperatures resulting higher effluent turbidity, COD soluble microbial products concentrations than SBR–B. However, once temperature increased, from presented activity SBR-B showing values production, hydrolytic enzymatic activities specific dynamic respiration rate. The bacterial community study revealed increase abundance Proteobacteria (especially Thiothrix species) Actinobacteria Nocardioides phyla at expense Bacteroidetes Chloroflexi during its operation.