Among the micropollutants identified in environment, non-steroidal anti-inflammatory drugs (NSAIDs) dominate more and often. This is due to both high consumption low efficiency of biological wastewater treatment plants, where initial transformation NSAIDs most often takes place. The solution problem may be using preparations supporting activated sludge sewage plants biodegradation NSAIDs. There...

Phenolic compounds biodegradation and its effect on the nitrification process were studied. A continuous stirrer tank reactor was operated in four stages, and phenolic compounds were fed as sequential way. In the first stage, at loading rate of 220 mg NH(4)(+)-N/Ld, the consumption efficiency was of 91%, being the product, nitrate. After that, p-cresol was fed at 53 mg C/Ld, reaching removal ef...

A method was developed to study the biodegradation and oxidative biodehalogenation of fluorinated phenols by 19F nuclear magnetic resonance (NMR). Characterization of the 19F NMR spectra of metabolite profiles of a series of fluorophenols, converted by purified phenol hydroxylase, catechol 1,2-dioxygenase, and/or by the yeast-like fungus Exophiala jeanselmei, provided possibilities for identifi...

We examined the anaerobic degradation of phenol and the ortho, meta, and para isomers of chlorophenol, methoxyphenol, methylphenol (cresol), and nitrophenol in anaerobic sewage sludge diluted to 10% in a mineral salts medium. Of the 12 monosubstituted phenols studied, only p-chlorophenol and o-cresol were not significantly degraded during an 8-week incubation period. The phenol compounds degrad...

In this study, a three-dimensional CFD transient model is established for predicting species concentration distribution in the biodegradation of phenol an airlift reactor (ALR). The gas–liquid flow ALR determined by Euler–Euler method coupled with standard k-? model, and bubble size predicted population balance (PBM). A turbulent mass diffusivity developed to simulate transfer process predict d...