Effect of electrode position on azo dye removal in an up-flow hybrid anaerobic digestion reactor with built-in bioelectrochemical system.
Effect of electrode position on azo dye removal in an up-flow hybrid anaerobic digestion reactor with built-in bioelectrochemical system.
复制标题
内置生物电化学系统的上流式混合厌氧消化反应器中电极位置对偶氮染料去除的影响
DOI：
10.1038/srep25223
复制
发表时间：
2016-04-28
影响因子：
4.6
通讯作者：
Cheng HY
中科院分区：
文献类型：
--
作者：
Cui MH;Cui D;Lee HS;Liang B;Wang AJ;Cheng HY
试验了内置BESS的两种组合厌氧消化(AD)生物反应器(电极安装在液体相(R1)和污泥相(R2))，以确定电极位置对偶氮染料废水处理的影响。以茜素黄R(AYR)为模型染料。当进水负荷为800Ayr g- /m3.d时，R1的脱色率为90.41Ayr± 6.20%，比R2高39%。生物电化学还原对AYR脱色的贡献(R1为16.23 ± 1.86%，R2为22.24 ± 2.14%)表明，尽管偶氮染料主要在污泥区被去除，但生物电化学还原进一步改善了出水水质，特别是对电极安装在液相的R1。电极生物膜(以肠杆菌为主)和污泥(以肠球菌为主)中的微生物群落在R1中有很好的区分，而R2中的微生物群落相似。这些结果表明，在厌氧混合系统中，液相电极比污泥相电极对偶氮染料的去除效果更好，这对AD-BES组合工艺处理各种难降解废水有很大的启发作用。
In this study, two modes of hybrid anaerobic digestion (AD) bioreactor with built-in BESs (electrodes installed in liquid phase (R1) and sludge phase (R2)) were tested for identifying the effect of electrodes position on azo dye wastewater treatment. Alizarin yellow R (AYR) was used as a model dye. Decolorization efficiency of R1 was 90.41 ± 6.20% at influent loading rate of 800 g-AYR/ m3·d, which was 39% higher than that of R2. The contribution of bioelectrochemical reduction to AYR decolorization (16.23 ± 1.86% for R1 versus 22.24 ± 2.14% for R2) implied that although azo dye was mainly removed in sludge zone, BES further improved the effluent quality, especially for R1 where electrodes were installed in liquid phase. The microbial communities in the electrode biofilms (dominant byEnterobacter)and sludge (dominant byEnterococcus)were well distinguished in R1, but they were similar in R2. These results suggest that electrodes installed in liquid phase in the anaerobic hybrid system are more efficient than that in sludge phase for azo dye removal, which give great inspirations for the application of AD-BES hybrid process for various refractory wastewaters treatment.