Civil and Environmental Engineering Department, Amirkabir University of Technology (AUT), Hafez Ave., Tehran 15875-4413, Iran.
J Hazard Mater. 2011 Nov 15;195:147-54. doi: 10.1016/j.jhazmat.2011.08.017. Epub 2011 Aug 12.
The application of aerobic moving bed biofilm process as post-treatment of anaerobically degraded azo dye Acid Red 18 was investigated in this study. The main objective of this work was to enhance removal of anaerobically formed the dye aromatic metabolites. Three separate sequential treatment systems were operated with different initial dye concentrations of 100, 500 and 1000 mg/L. Each treatment system consisted of an anaerobic sequencing batch reactor (An-SBR) followed by an aerobic moving bed sequencing batch biofilm reactor (MB-SBBR). Up to 98% of the dye decolorization and more than 80% of the COD removal occurred anaerobically. The obtained results suggested no significant difference in COD removal as well as the dye decolorization efficiency using three An-SBRs receiving different initial dye concentrations. Monitoring the dye metabolites through HPLC suggested that more than 80% of anaerobically formed 1-naphthylamine-4-sulfonate was completely removed in the aerobic biofilm reactors. Based on COD analysis results, at least 65-72% of the dye total metabolites were mineralized during the applied treatment systems. According to the measured biofilm mass and also based on respiration-inhibition test results, increasing the initial dye concentration inhibited the growth and final mass of the attached-growth biofilm in MB-SBBRs.
本研究考察了好氧移动床生物膜工艺作为厌氧降解偶氮染料酸性红 18 的后处理方法的应用。这项工作的主要目的是增强去除厌氧形成的染料芳香代谢物。三个单独的连续处理系统以不同的初始染料浓度 100、500 和 1000mg/L 运行。每个处理系统都由一个厌氧序批式反应器（An-SBR）和一个好氧移动床序批式生物膜反应器（MB-SBBR）组成。高达 98%的染料脱色和超过 80%的 COD 去除是在厌氧条件下发生的。所得结果表明，在接收不同初始染料浓度的三个 An-SBR 中，COD 去除率以及染料脱色效率没有显著差异。通过 HPLC 监测染料代谢物表明，在好氧生物膜反应器中，超过 80%的厌氧形成的 1-萘胺-4-磺酸盐被完全去除。根据 COD 分析结果，在应用的处理系统中，至少有 65-72%的染料总代谢物被矿化。根据测量的生物膜质量以及呼吸抑制试验结果，初始染料浓度的增加抑制了 MB-SBBR 中附着生长生物膜的生长和最终质量。
