Enhancement of bioelectricity production from Soil Microbial Fuel Cell (SMFC) by additional glucose, nutrient broth and Escherichia coli bacteria
Soil Microbial Fuel Cell (SMFC) is a device that using bacteria in soils as a biocatalyst. These bacteria, called exoelectrogenic bacteria are oxidizing organic substrates to release electrons, which then harvested in an external circuit to produce bioelectricity. Despite all the potential, the bi...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2019
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| Online Access: | http://journalarticle.ukm.my/19606/1/17.pdf http://journalarticle.ukm.my/19606/ https://www.ukm.my/jkukm/si-21-2019/ |
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| Summary: | Soil Microbial Fuel Cell (SMFC) is a device that using bacteria in soils as a biocatalyst. These bacteria, called exoelectrogenic
bacteria are oxidizing organic substrates to release electrons, which then harvested in an external circuit to produce
bioelectricity. Despite all the potential, the bioelectricity production from soils is still low and its relation with SMFC
conditions is uncertain. Hence, the main objective in this study is to enhance and stabilize the bioelectricity production of
SMFC by additional glucose, nutrient broth and Escherichia coli (E. coli) as exoelectrogenic bacteria. A number of factors
of SMFC performance were first identified to be preliminary investigated, that is the type of electrode, water addition to soil
and distance between anode to cathode. It has been established in this study to use SMFC with the configuration of 9.5 cm
in diameter and 15 cm height of the plastic container, with the 12 cm distance between carbon felt of anode and cathode.
The electricity produced was measured by using a multimeter in term of voltage reading (mV). From this study, the highest
bioelectricity produced was obtained from SMFC using nutrient broth with a maximum voltage of 700 mV. It has found that
the additional E. coli bacteria did not increase the bioelectricity production. The use of E. coli needed to be combined with
nutrient broth in order to achieve high and stable bioelectricity. It can be suggested that the indigenous bacteria that exist
in the soils possibly played the role in producing bioelectricity. |
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