Bioprocess and Biosystems Engineering ( IF 3.5 ) Pub Date : 2020-06-28 , DOI: 10.1007/s00449-020-02396-4 S M Sathe 1 , G D Bhowmick 2 , B K Dubey 1 , M M Ghangrekar 1
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Abstract
Sodium dodecyl sulfate (SDS) is a widely used anionic surfactant, which finds its way to the receiving water body due to the incapability of conventional wastewater treatment systems to completely remove it. A hybrid treatment system consisting of upflow microbial fuel cell (MFC) with titanium dioxide (TiO2) as a photocathode catalyst was developed for treating synthetic wastewater spiked with SDS (10.00 ± 0.46 mg L−1). Effluent from anodic chamber of MFC was passed through raw laterite soil filter followed by the photo-cathodic chamber with TiO2-coated cathode irradiated with the UV spectrum. This hybrid system was operated under varying hydraulic retention time (HRT) in anodic chamber of MFC. The SDS removal efficiency of more than 96% along with organic matter removal efficiency of more than 71% was obtained by this hybrid system at different HRTs. The MFC having cathode coated with TiO2 could generate a maximum power density of 0.73 W m−3 and 0.46 W m−3 at the HRT of 12 h and 8 h, respectively, showing the adverse effect of increased SDS loading rate on the electrical performance of MFC. This investigation highlighted the importance of HRT in anodic chamber of MFC and offered solution for effective removal of surfactant from wastewater.
Graphic abstract
中文翻译：
使用光阴极微生物燃料电池和基于红土的混合处理系统去除废水中的表面活性剂。
摘要
十二烷基硫酸钠 (SDS) 是一种广泛使用的阴离子表面活性剂，由于常规废水处理系统无法将其完全去除，因此它会进入接收水体。开发了一种由上流式微生物燃料电池 (MFC) 和二氧化钛 (TiO 2 ) 作为光电阴极催化剂组成的混合处理系统，用于处理掺有 SDS (10.00 ± 0.46 mg L -1 ) 的合成废水。来自 MFC 阳极室的出水通过未加工的红土土壤过滤器，然后通过带有 TiO 2的光阴极室- 用紫外光谱照射的涂层阴极。该混合系统在 MFC 的阳极室中在不同的水力停留时间 (HRT) 下运行。该混合系统在不同的 HRT 下获得了超过 96% 的 SDS 去除效率和超过 71% 的有机物去除效率。阴极涂有 TiO 2的 MFC在 HRT 为 12 小时和 8 小时时可分别产生 0.73 W m -3和 0.46 W m -3的最大功率密度，表明增加 SDS 加载速率对电的不利影响。 MFC 的性能。该研究强调了 HRT 在 MFC 阳极室中的重要性，并为有效去除废水中的表面活性剂提供了解决方案。
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