Exploratory study on improving the benthic environment in sediment by sediment microbial fuel cells

Touch, Narong; Hibino, Tadashi; Kinjo, Nobutaka; Morimoto, Yuki

doi:10.1007/s13762-017-1418-8

Cited by 13 publications

(3 citation statements)

References 16 publications

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“…Touch et al [5] showed that SMFCs effectively remove hydrogen sulfide from sediment and fix the phosphate in sediment. They proved that the oxidation of reduced substances at the SMFC anode improve the sediment quality, in turn improving the benthos habitation in highly reduced sediment [6]. Accordingly, SMFCs have been installed in the sediment deposited near a sewage outlet and at an oyster farm to improve the quality of the sediment and water at these sites [7,8].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2020

IJEP

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Sediment microbial fuel cells (SMFCs) have received notable attention for improving water and sediment quality. However, their low performance must be improved. Adding steelmaking slag (SS) to littoral sediment reportedly improved the SMFC performance. However, the decomposition of the organic matter in sediment that fueled SS-used SMFC (SS-SMFC) has not been revealed. The present study examines changes in the state of organic matter present in paddy soil that fueled SS-SMFC. Furthermore, the effects of a series connection of a solar cell with SS-SMFC (SC-SMFC) on changes in the state of organic matter are also examined. Increasing the electrical current of the SMFC and the alkalinity of the paddy soil by SS better facilitated the decomposition of organic matter. Relative to SS-SMFC, SC-SMFC (generating the periodic current) better facilitated the decomposition of organic matter. However, SS-SMFC (generating continuous current) better improved the redox conditions of the paddy soil than SC-SMFC. The generated electrical current decomposed the organic matter which burns at high temperature, thereby increasing the amount of organic matter that burns at lower temperature. A similar trend was observed among SMFC, SS-SMFC, and SC-SMFC. It can be said that this effect is independent of the current characteristic (continuous or periodic).

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Section: Introductionmentioning

confidence: 99%

Untitled

2020

IJEP

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“…1. Wastewater has been discharged in this coastal region from nearby industry complexes at various times in the past (about 60 times per year during rainfall), 1 and even though the volume of wastewater discharged has been reduced to 40% of past levels, blue tides are still observed throughout the year, which suggests that significant contamination loads and oxygen depletion remain. Moreover, as the topography of this area is narrow and long (i.e., a maximum width of approximately 500 m and a total length of approximately 8 km), the water exchange rate is very low, which allows high concentrations of contaminants to accumulate in the seabed.…”

Section: Introductionmentioning

confidence: 99%

Enhanced power performance of an in situ sediment microbial fuel cell with steel-slag as the redox catalyst: I. electricity generation

Kim

Nakashita

Hibino

2020

Sustainable Energy Fuels

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“…An increasing number of studies have found a decrease in the amount and a variation in the state of the organic matter present in the sediment-applied SMFC, and a positive increase of the redox potential (ORP) of sediment when using SMFC [5][6][7]. SMFC is also effective in protecting against the deterioration of bottom water quality due to ion diffusion from bottom sediment [8], and in improving the benthic habitat environment in highly reduced sediment [9]. The authors proved that the oxidation of reduced substances at the anode of SMFC plays an important role in improving the water quality and the benthos inhabitation.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Sediment and Water Quality with Solar Cell-Combined Sediment Microbial Fuel Cells in Oyster Farms

Touch¹,

Yamaji²,

Nagama³

et al. 2018

IJEP

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It has been reported that solar cell-combined sediment microbial fuel cell (SC-SMFC) can be an alternative method for improving sediment and water quality. This study describes the employment of SC-SMFC for improving sediment and water quality in an oyster farm. The release of hydrogen sulfide from bottom sediment is one of the factors that cause the death of oysters which should be suppressed. At 3 months after the employment of SC-SMFC, bottom water (100 mm from the seafloor) and surface sediment (-100 mm from the seafloor) were collected and analyzed. The results showed decreases in hydrogen sulfide and phosphate concentrations in the sediment, indicating the improvement of sediment quality owing to the SC-SMFC application. In addition, the quality of bottom water was also improved owing to the SC-SMFC application. For example, the dissolved oxygen concentration and redox potential of the bottom water in the system-applied area remained higher comparing with those in the control area. These findings further strengthen that SC-SMFC is a highly effective method for suppressing the release of hydrogen sulfide and phosphate from sediment, which can protect water environment from hypoxia and eutrophication.

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Exploratory study on improving the benthic environment in sediment by sediment microbial fuel cells

Cited by 13 publications

References 16 publications

Untitled

Untitled

Enhanced power performance of an in situ sediment microbial fuel cell with steel-slag as the redox catalyst: I. electricity generation

Improvement of Sediment and Water Quality with Solar Cell-Combined Sediment Microbial Fuel Cells in Oyster Farms

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