鉄鋼スラグ混合泥における微生物燃料電池の効用  [in Japanese] EFFECTS OF MICROBIAL FUEL CELLS IN STEEL SLAG-MIXED SEDIMENT  [in Japanese]

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Abstract

堆積泥を燃料とする微生物燃料電池(Sediment microbial fuel cell: SMFC)は有機物分解を促進させるが,電極への電子伝達速度が低く,堆積泥の酸性化等の問題が残されている.本研究ではSMFCにおける電子伝達速度の向上,酸性化の緩和,および有機物分解に対する鉄鋼スラグの効果を室内実験により明らかにする.下水放流を受けた海域から堆積泥を採取し,鉄鋼スラグと混合した堆積泥からSMFCで電子回収を行った.実験終了後,各ケースの間隙水質,上層水,および堆積泥の性状を比較し,鉄鋼スラグの効果を検討した.この結果,鉄鋼スラグの混合により電極への電子伝達速度が向上されること,電子回収に伴うpHの低下を防ぐこと,および有機物分解が促進されることがわかった.さらに,電子回収は鉄鋼スラグの溶解を促進し,鉄鋼スラグの効果を高くすることが明らかになった.

 Sediment microbial fuel cell (SMFC) can improve decomposition of organic matter in sediments; however, there are some problems such as low rate of electron transfer and decrease in pH of sediments. In this study, Effects of steel slag on increasing electron transfer rate, increasing pH, and fixing nutrient salts in SMFC were examined through laboratory experiments. Sediment was collected from a coastal region that affected by wastewater discharge, and used as fuel in SMFC. At the end of experiment, pore water and overlaying water qualities, and sediment properties of each case were analyzed and compared. As a result, mixing steel slag with sediment increased electron transfer rate and protected the decrease of pH caused by SMFC. Furthermore, SMFC enhanced dissolution of steel slag, making steel slag to be more effective.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 72(2), I_1333-I_1338, 2016

    Japan Society of Civil Engineers

Codes

  • NII Article ID (NAID)
    130005282261
  • Text Lang
    JPN
  • ISSN
    1884-2399
  • NDL Article ID
    027812723
  • NDL Call No.
    YH267-236
  • Data Source
    NDL  J-STAGE 
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