针对传统偶氮染料处理方法效率低的缺点,利用新型升流式微生物催化电解反应器(UBER)强化水中偶氮染料茜素黄R(AYR)还原脱色.反应器采用上升流、连续供水的运行方式,在较短水力停留时间4h条件下,脱色率可达82.1%,脱色速率达1.74mol·m-1·d-1,出水色度80倍.茜素黄R的脱色主要发生在UBER的阴极区,是电化学反应和电极微生物生物反应的共同结果,生物阳极也有一定的脱色能力.AYR最终生成两种稳定产物对苯二胺和5-氨基水杨酸,反应过程中无硝基中间产物的积累.
Due to the low efficiency of traditional azo dye treatment process, in this study a novel up-flow hiocatalyzed electrolysis reactor was used for azo dye alizarin yellow R (AYR) decolorization. The reactor operated in an up-flow, continuous flow mode, and the results showed that the decolorization efficiency was 82. 1% and the decolorization rate was 1.74 mol m-3 d-1 at HRT of 4 h. The chrominanee of the effluent was as low as 80. AYR was mainly discolored via electrochemical reaction in the cathode zone of UBER. The bio-anode also made some contribution to the decolorization. Two stable products p-phenylenediamine and 5 - aminosalicylic acid were produced finally without accumulation of nitro intermediates.