Ability of Activated Sludge to Degrade Nitrobenzene in Municipal Wastewater

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Abstract
Both susceptibility to chemical oxidation and biodegradability of nitrobenzene are determined. Nitrobenzene is found to be resistant to chemical oxidation with potassium permanganate and is partially oxidized with potassium dichromate. Biodegradability is studied in a batch and in a flow‐through system both with municipal and with artificially prepared wastewaters. Nitrobenzene present in municipal wastewater at 300 g/m3 concentrations is found to be biodegradable after adaptation of the biomass. In a flow‐through system nitrobenzene is degradable at 400 g/m3 concentration. Concentrations exceeding 10 g/m3 inhibit the nitrification process.

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