Sustainable bio-energy generation via the conversion of spent wash using dual chamber microbial fuel cell  

作　　者：Abdul Sattar Jatoi Jawad Ahmed Afaque Ahmed Bhutto Muhammad Shuaib Shaikh 

机构地区：[1]Department of Chemical Engineering,Dawood University of Engineering and Technology Karachi,Sindh,Pakistan [2]Changzhou DUBO Polymer Co.,Ltd.,Changzhou 213002,China [3]Department of Basic Science and Related Studies,The University of Larkano,Sindh,Pakistan [4]Department of Chemical Engineering,Mehran University of Engineering and Technology Jamshoro,Sindh,Pakistan

出　　处：《Waste Disposal and Sustainable Energy》2024年第2期219-231,共13页废弃物处置与可持续能源（英文）

摘　　要：Microbial fuel cells(MFCs)are innovative devices that combine microbial processes with electrochemical reactions to convert organic matter in wastewater into electricity while simultaneously treating the wastewater.One such application is the treatment of spent wash,a highly polluting effluent generated from the distillery industry after crude mesh is separated into ethanol and spent wash.Spent wash,also known as distillery effluent or stillage,is a highly challenging wastewater treatment method due to its high chemical oxygen demand(COD),biological oxygen demand(BOD),and total dissolved solids(TDS).These characteristics make it a complex and polluting industrial effluent that requires specialized treatment processes to reduce its environmental impact effectively.However,MFCs have shown promise in treating spent wash,as they can utilize the organic matter in wastewater as a fuel source for microbial growth as well as for electricity generation.For the treatment of spent wash,Saccharomyces cerevisiae sp.was used as a biocatalyst along with 340 mol/L potassium ferricyanide in the cathode chamber and 170 mol/L methylene blue in the anode as a mediator.All tests were conducted by balancing a one-liter volume for power production from spent wash in MFC with the optimal conditions of 10%agarose,pH 8.5,300 mL/min of aeration in the cathode chamber,and 40%(in weight)substrate concentration.At an ideal concentration,the maximum current and power density are roughly 53.41 mA/m^(2)and 72.22 mW/m^(2),respectively.For each litre of processed spent wash,a maximum voltage of 850 mV(4.5 mA)was obtained.Amazingly,91%of COD and BOD were removed from the effluent MFC.These findings show that MFCs are capable of producing electricity and efficiently removing COD from wasted wash at the same time.

关 键 词：Microbial fuel cell Chemical oxygen demand Biological oxygen demand-Current density Power density Spent wash 

分 类 号：TM911.4[电气工程—电力电子与电力传动]