制革废水处理与盐度条件下上流微生物燃料电池中的生物能源生产耦合。
Tannery wastewater treatment coupled with bioenergy production in upflow microbial fuel cell under saline condition.
机构信息
Department of Marine Biology, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia.
Department of Marine Biology, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia; Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
出版信息
Environ Res. 2022 Sep;212(Pt B):113304. doi: 10.1016/j.envres.2022.113304. Epub 2022 Apr 20.
Tannery industry handling huge amount of leather materials release immense amount of saline organic content wastewater. The present research was focused on the treatment of tannery industrial wastewater in UMFC (upflow microbial fuel cell) under saline condition (4%). The UMFC reactor was operated at different organic load (OL) such as 0.6, 1.2, 1.8 and 2.4 gCOD/L respectively. Total chemical oxygen demand (TCOD) removal at 0.6, 1.2, 1.8 gCOD/L was 87 ± 1.2%, 91 ± 1.2% and 93 ± 1.8% respectively. Soluble chemical oxygen demand (SCOD) removal in UMFC at 0.6, 1.2, 1.8 gCOD/L was 85 ± 0.6%, 88 ± 1.2% and 91 ± 1.8% respectively. Total suspended solids (TSS) removal was 49%, 78%, 81% at 0.6, 1.2, 1.8 gCOD/L OL in UMFC. Further, raise in OL to 2.4 gCOD/L showed decrease in TCOD, SCOD (80% and 72%) and TSS (60%) removal. Maximal power production of 854 mV with corresponding PD (power density) of 462 mW/m and CD (current density) of 523 mA/m was registered at 1.8 gCOD/L OL in UMFC. Increase in OL to 2.4 gCOD/L revealed decline in energy production to 810 mV with PD (385 mW/m) and CD (438 mA/m) in UMFC. Maximal bioaccumulation of chromium (95%) was recorded at 1.8 gCOD/L OL. Among different OL used 1.8 gCOD/L OL was optimum for the treatment of tannery wastewater and energy production. Bacterial community analysis in anode of UMFC revealed the dominance of promising electrogenic halophilic strains such as Ochrobactrum, Marinobacter, Rhodococcus and Bacillus in all the OL. Thus, the research clearly revealed the efficacy of halophilic consortium to treat the saline tannery wastewater coupled with bioenergy production in UMFC.
制革行业处理大量皮革材料，排放大量含盐有机含量废水。本研究集中于在 UMFC（上流微生物燃料电池）中处理制革工业废水在盐度条件（4%）下。UMFC 反应器在不同的有机负荷（OL）下运行，例如分别为 0.6、1.2、1.8 和 2.4 gCOD/L。在 0.6、1.2、1.8 gCOD/L 时，总化学需氧量（TCOD）去除率分别为 87±1.2%、91±1.2%和 93±1.8%。在 0.6、1.2、1.8 gCOD/L 时，UMFC 中的可溶性化学需氧量（SCOD）去除率分别为 85±0.6%、88±1.2%和 91±1.8%。在 UMFC 中，总悬浮固体（TSS）去除率分别为 49%、78%和 81%，OL 为 0.6、1.2 和 1.8 gCOD/L。进一步，OL 提高到 2.4 gCOD/L 时，TCOD、SCOD（80%和 72%）和 TSS（60%）的去除率下降。在 UMFC 中，OL 为 1.8 gCOD/L 时，最大产电功率为 854 mV，相应的 PD（功率密度）为 462 mW/m，CD（电流密度）为 523 mA/m。在 UMFC 中，OL 增加到 2.4 gCOD/L 时，能量产生下降到 810 mV，PD（385 mW/m）和 CD（438 mA/m）。在 OL 为 1.8 gCOD/L 时，铬的最大生物积累量（95%）。在使用的不同 OL 中，1.8 gCOD/L OL 是处理制革废水和产生能量的最佳选择。UMFC 阳极中的细菌群落分析显示，在所有 OL 中，优势的电生嗜盐菌属包括 Ochrobactrum、Marinobacter、Rhodococcus 和 Bacillus。因此，该研究清楚地表明，嗜盐菌组合可有效地处理含盐制革废水，并在 UMFC 中产生生物能。
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