(EN)
A process for the biological treatment of a spent caustic solution containing sulphides is disclosed, wherein the solution is introduced into an aerobic reactor containing sulphide-oxidising bacteria, and the sulphides are partly converted to elemental sulphur and partly to sulphate by controlling the redox potential in the reactor at a value below -300 mV (against an Ag/AgCl reference electrode), or below -97 (against a H2 reference electrode). Also disclosed is process for the biological treatment of an aqueous solution containing sulphides and/or mercaptans in an aerobic reactor, wherein the solution is treated in the presence of bacteria of the new species Methylophaga sulfidovorans.
(ZH) 本发明公开了一种含有硫化物的废碱液的生物处理方法，其中溶液被加到含有硫化物氧化菌的通气反应器中，通过控制反应器中氧化还原电势低于-300mV(Ag/AgCl作参考电极)，或者低于-97mV(以H2作参考电极)，将硫化物部分转化成元素硫，部分转化成硫酸盐。本发明还公开了一种含有硫化物和/或硫醇的水溶液的生物处理方法，其中溶液在新菌种Methylophaga sulfidovorans的存在下进行处理。
