| 摘要 |
The invention concerns a process for working up an effluent containing nitro-hydroxy-aromatic compounds which comprises heating said effluent to 150 DEG C. to 500 DEG C. with the exclusion of air and oxygen and under elevated pressure. The process results in a decrease of nitro-hydroxy-aromatic compound concentration in the effluent to below 20 ppm. and the resulting material can then be fed to a microbiological sewage plant for further working up, without the microorganisms therein being killed by the bactericidally active nitro-hydroxy-aromatic compounds.
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