4.7 Article

Biomass and domestic waste: a potential resource combination for bioenergy generation and water treatment via benthic microbial fuel cell

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SPRINGER HEIDELBERG
DOI: 10.1007/s11356-023-29430-8

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Benthic microbial fuel cell; Lignocellulosic biomass; Bakery waste; Energy; Metal degradation

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The benthic microbial fuel cell (BMFC) is an efficient bioelectrochemical fuel cell system. Researchers have explored the use of local bakery waste and lignocellulosic biomass material to overcome challenges and improve the feasibility of the technique at a pilot scale. Results showed high power density and degradation efficiency of metal ions under optimized parameters.
The benthic microbial fuel cell (BMFC) is one of the most efficient types of bioelectrochemical fuel cell systems. Modern bioelectrochemical fuel cells have several drawbacks, including an unstable organic substrate and a microorganism-unfriendly atmosphere. The recent literature to encounter such issues is one of the emerging talks. Researchers are focusing on the utilization of biomass and waste to encounter such challenges and make the technique more feasible at the pilot scale. This study investigated the combination of local bakery waste as an organic substrate with lignocellulosic biomass material. The whole experiment was conducted for 45 days. At an external resistance of 1000 ῼ and an internal resistance of 677 ῼ, the power density was found to be 3.51 mW/m2. Similarly, for Pb2+, Cd2+, Cr3+, Ni2+, and Co2+, the degradation efficiency was 84.40%, 81.21%, 80%, 89.50%, and 86.0%, respectively. The bacterial identification results showed that Liquorilactobacillus nagelii, Proteus mirabilis, Pectobacterium punjabense, and Xenorhabdus thuongxuanensis are the most prominent species found on anode biofilm. The method of electron generation in this study, which includes the degradation of metal ions, is also well described. Lastly, optimising the parameters showed that pH 7 provides a feasible environment for operation. A few future suggestions for practical steps are enclosed for the research community.

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