Effect of intermittent aeration on textile dyeing wastewater treatment in downflow hanging sponge column integrated with hollow fiber submerged anaerobic membrane bioreactor

Q1 Environmental Science Bioresource Technology Reports Pub Date : 2024-06-01 DOI:10.1016/j.biteb.2024.101869

Syed Saquib , Helen Julian , Sri Harjati Suhardi , Takahiro Watari , Takashi Yamaguchi , Tjandra Setiadi

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Abstract

An HF-sAnMBR-DHS system was examined for enhanced RB5 diazo dye synthetic textile wastewater treatment. Natural aeration was provided during Phase-1 (51 days), while intermittent forced aeration (2 L/min for 5 min ON/OFF cycle) was purged into the DHS in Phase-2 (66 days). The mean tCOD and sCOD removal at P-1 were 88.43 ± 1.84 % and 90.82 ± 0.78 %, respectively, whereas in P-2, the removal reached 94.30 ± 2.01 % and 95.79 ± 0.67 %, respectively. Spectrophotometric analysis reveals 81.41 ± 5.02 % color reduction in P-1 whereas and P-2, 83.40 ± 6.93 % decolorization. The mean Pt-Co levels were 366.33 ± 112.91 and 222.13 ± 44.41 in both phases respectively. At the median initial flux (14.79 LMH), no significant fouling occurred in the membrane module. Microbial analysis revealed Clostridium as a major genus in the HF-AnMBR and DHS, attributed to azo dye-degrading bacteria. The abundance of aerobic microbes present in the DHS might help in further degradation of the intermediate aminated compounds.

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间歇曝气对集成中空纤维浸没式厌氧膜生物反应器的下流式悬挂海绵柱处理纺织印染废水的影响

研究了用于强化 RB5 重氮染料合成纺织废水处理的 HF-sAnMBR-DHS 系统。第一阶段（51 天）采用自然曝气，第二阶段（66 天）向 DHS 中注入间歇性强制曝气（2 升/分钟，5 分钟 ON/OFF 循环）。P-1 阶段的 tCOD 和 sCOD 平均去除率分别为 88.43 ± 1.84 % 和 90.82 ± 0.78 %，而 P-2 阶段的去除率分别为 94.30 ± 2.01 % 和 95.79 ± 0.67 %。分光光度分析表明，P-1 的色度降低率为 81.41 ± 5.02%，而 P-2 的脱色率为 83.40 ± 6.93%。两个阶段的铂-钴平均含量分别为 366.33 ± 112.91 和 222.13 ± 44.41。在中位初始通量（14.79 LMH）下，膜组件未出现明显污垢。微生物分析表明，梭状芽孢杆菌是高频-安瓿反应器和 DHS 中的主要菌属，属于偶氮染料降解菌。DHS 中存在的大量好氧微生物可能有助于进一步降解中间胺化化合物。

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