دانلود رایگان مقاله انگلیسی افزایش تولید الکتریسته در یاخته های زنده با تصفیه فاضلاب کارخانه ها با استفاده از سلول سوختی - وایلی 2017

Distillery wastewater is an important potential sources for electricity generation using Microbial Fuel Cell (MFC) because of it has high content of organic waste and can be easily degraded. This study investigated the effect of feed pH and buffering conditions on electricity production and treatment efficiency using distillery wastewater as a substrate in MFC. The anodic chamber was operated with diluted distillery wastewater (4000 6 20 mg COD/L) at various pH between 5.4 and 10 while the cathode chamber was maintained at pH 7.5. The MFC peak power density of 168 mW/ m2 (580 mA/m2 ) with COD, color and TDS removal efficiency of 68.2, 26.4, and 15.4%, respectively was achieved at pH 8. Cyclic voltammetry revealed that an exoelectrogenic activity of microorganism was significantly influenced with respect to pH. The effect of buffering salts in the anolyte on MFC performance was also investigated. When the system operating with borate buffer, highest power density of 194.7 mW/m2 (624 mA/m2 ) at 100 X was achieved. The result indicated that alkaline condition (pH 8) and borate buffer was favored for obtaining maximum power generation and treatment efficiency from distillery wastewater in the MFC

CONCLUSION

This study investigated the effect of feed pH of the distillery wastewater and buffers on the overall performance of the MFC. The experimental results demonstrated that anolyte of MFC at pH 8 showed the better power production. At pH 8, the system achieved a maximum power density of 168 mW/m2 , which was due to the presence of microbial communities and its exoelectrogenic activity. When the MFC operated with buffer at pH 8, the performance of MFC was improved due to increase in the conductivity of the wastewater and also maintain the constant environment that is suitable for the bacterial growth and its exoelectrogenic activity. Although the borate buffer enhanced the power generation in the MFC as compared to the other buffers. The COD, color and TDS removal efficiency was also significantly varied with respect to different feed pH and a maximum of 68.4%, 26.4 and 15.4%, respectively was achieved at pH 8. The COD removal efficiency was also increased while using the buffer at optimal pH as compared with nonbuffered control. Finally, the results concluded that the optimum pH 8 and borate buffer enhanced the power generation and treatment efficiency from distillery wastewater in the MFC.