Abstract
It was found that benzothiazole, 2-oxybenzothiazole and 2-benzothiazolesulphonate were degraded in activated sludge systems. 2-Mercaptobenzothiazole (MBT) was more resistant, although the first step in MBT degradation seemed to be transformation to the sulphonate form. At higher MBT concentrations, it was transformed into a disulphide, which accumulated in the sludge. MBT was also found to be mainly responsible for the toxicity of rubber chemical waste-water towards activated sludges. It inhibited the degradation of the other hetrocycles. Only at concentrations of around 20 ppm was MBT degraded. Mercaptobenzimidazole ranked second in resistance to degradation.
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Correspondence to: H. Verachtert
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De Vos, D., De Wever, H. & Verachtert, H. Parameters affecting the degradation of benzothiazoles and benzimidazoles in activated sludge systems. Appl Microbiol Biotechnol 39, 622–626 (1993). https://doi.org/10.1007/BF00205064
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DOI: https://doi.org/10.1007/BF00205064