Pretreatment and biodegradability enhancement of DSD acid manufacturing wastewater
作者： Gang Yu , Wanpeng Zhu , Zhihua Yang
DOI: 10.1016/S0045-6535(98)00064-2
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摘要: Two advanced oxidation processes, Fenton's reagent and ozonation, were used for pretreatment of a 4,4'-diaminostilbene-2,2'-disulfonic acid (DSD-acid) manufacturing wastewater on laboratory scale. The results showed that both methods are suitable partial removal chemical oxygen demand (COD) color as well the enhancement biodegradability DSD-acid before conventional biological treatment. by 9.0 g/L H2O2 150 mg/L Fe2+ ozonation 7.5 O3 led to an improved (BOD5/COD = 0.3). in combination with Fe3+ coagulation has shown effectively remove COD color. About 90% 95% removals obtained at optimum condition, 2 H2O2, followed two-stage 5 FeCl3, respectively.
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