Abstract
Organic vegetable wastes such as mustard vegetables found in traditional markets, especially Medan, are quite abundant and the increase in electricity demand is not matched by the availability of adequate energy sources, encouraging efforts to find alternative sources of renewable energy, economical and environmentally friendly. Microbial Fuel Cell (MFC) reactors can be used as an alternative energy source that converts chemical energy into electrical energy through biocatalytic reactions using microorganisms by utilizing organic materials. This study aims to determine the effect of the use of mustard vegetable waste substrate with a variety of starters and fermentation duration in the MFC reactor system to the voltage and current of electrical energy generated. The design of this study used a factorial 4x2 Completely Randomized Design consisting of two factors, namely factor A substrate composition and fermentation duration B factor. The results showed that there was an influence of substrate composition and fermentation duration on the MFC reactor system on the electrical energy generated by the system. Electricity (I) (20.1 mA) and voltage (72.13 mV) highest electricity produced by MFC reactor with composition of glucose substrate and EM4 starter with 5 days fermentation duration, followed by the treatment of vegetable mustard waste and EM4 with a fermentation duration of 5 days (15.2 mA and 68.76 mV). In terms of economics, the use of vegetable mustard waste substrate material with EM4 starter in the MFC reactor has more potential to be developed than using glucose substrates which are relatively more expensive. Keywords: Electric energy; fermentation duration; microbial fuel cell; mustard vegetable waste
Highlights
The abundance of organic waste such as vegetable waste such as mustard vegetables found in traditional markets, especially Medan
This study aims to determine the effect of the composition of the vegetable mustard waste substrate with starter manure, fermentation time, and its interaction using the Microbial Fuel Cell (MFC) reactor system to the voltage and current of electrical energy produced system
Electric energy produced by microbial fuel cell system Electrical energy produced by MFC reactor systems made from mustard and stater vegetable waste that varied and long periods of 5 and 10 days fermentation are presented in Table 1 and Table 2
Summary
The abundance of organic waste such as vegetable waste such as mustard vegetables found in traditional markets, especially Medan. In addition to the problem of waste, energy problems are one of the problems that are often faced in the city of Medan. Increasing energy demand continues to increase but is not balanced with the availability of adequate energy sources. A sustainable alternative energy source is needed to avoid an energy crisis. The Microbial Fuel Cell (MFC) reactor can be used as an alternative energy source that is environmentally friendly and can be a source of energy in the future (Chang et al 2016a; Padey et al 2011). MFC facilitates an oxidation reduction environment that can be controlled by the flow of electrons and makes it an ideal tool for processing organic matter into inorganic matter in microbial waste.
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