The industrial effluents recently have become more complex and a constant health hazard polluting and contaminating water, soil and air. In this study, it is important to obtain high performance for the treatment of recalcitrant and toxic azo dyes being caused by textile industries and deal with inhibitory factors. For this aim, a continuous two-stage mesophilic anaerobic system has been employed to treat synthetic textile wastewater contained C. I. Acid Red 88 dye. A laboratory-scale of acidogenic continuous stirred tank reactor followed by methanogenic upflow anaerobic sludge bed reactor was operated at hydraulic retention time (HRT) of 48, 24 and 12 h. The acidogenic reactor was able to remove 50.3% of the total COD added and 90.3% of the color at HRT of 12 h. However, the maximum bio-hydrogen conversion as COD was 30.7% with acetate and butyrate as main by-products at HRT of 24 h. The second stage showed a total of 94.8% COD removal and 97.2% decolorization at HRT of 12 h with maximum methane production of 1.01 l/l/day. The experimental results showed that the changing in the soluble by-product could explain the effect of HRT and the maximum total hythane energy produced was 121.5 MJ/m³.

最近，工业废水变得更加复杂，并且不断危害健康，污染和污染水，土壤和空气。在这项研究中，重要的是要获得高性能的性能，以处理由纺织工业引起的顽固和有毒的偶氮染料并应对抑制因素。为了这个目的，已经使用连续的两阶段中温厌氧系统来处理包含CI酸性红88染料的合成纺织废水。在水力停留时间（HRT）为48、24和12小时的条件下，运行实验室规模的产酸连续搅拌釜反应器，然后进行产甲烷上流厌氧污泥床反应器。产酸反应器在HRT为12 h时能够去除添加的总COD的50.3％和颜色的90.3％。但是，最大的生物氢转化为COD为30。在HRT 24 h时，以乙酸盐和丁酸盐为主要副产物的浓度为7％。第二阶段在HRT为12 h时，总共去除了94.8％的COD和97.2％的脱色，最大甲烷产量为1.01 l / l / day。实验结果表明，可溶副产物的变化可以解释HRT的影响，产生的最大总乙烷能量为121.5 MJ / m³。