Decolorization and estrogenic activity of colored livestock wastewater after electrolysis treatment

  • Hotaka KaiEmail author
  • Yasuhiro Ishibashi
  • Taiki Mori
  • Hiroshi Ishibashi
  • Isao Kawaguchi
  • Hiroki Ohwaki
  • Takehiro Takemasa
  • Koji Arizono
Original Article


Livestock wastewater is treated by activated sludge treatment. Untreated livestock wastewater has high estrogen activity because animal excreta contains estrogen. When activated sludge treatment is applied, the estrogen activity declines or is lost. However, the color of treated livestock wastewater is deep brownish-red because of the decomposition of organic compounds or the synthesis of metabolites. Discharging colored wastewater to the environment could cause some problems, so it is necessary to decolorize colored wastewater before it is discharged. It has been suggested that electrolysis decolorization technology is suitable for treating colored wastewater; however, the process produces volatile organic compounds (VOCs). In fact, little research has been conducted with reference to estrogen activity in wastewater that has undergone electrolysis, especially on the contribution of the electrolysis decolorization process to estrogen activity, i.e., the possibility of resynthesis of some substance with estrogen activity due to resolved and metabolized colored components. In this study, the concentration of VOC was measured for various electrolysis conditions, and estrogen activity was examined using a yeast two-hybrid assay. From the results, decolorization of colored livestock wastewater by electrolysis was possible, and the VOC generation during electrolysis could be controlled depending on the electrolysis conditions. Estrogen activity in colored livestock wastewater disappeared on electrolysis decolorization.

Key words

Estrogen activity Electrolysis VOC Livestock wastewater Decolorization 


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Copyright information

© Springer Japan 2010

Authors and Affiliations

  • Hotaka Kai
    • 1
    Email author
  • Yasuhiro Ishibashi
    • 2
  • Taiki Mori
    • 3
  • Hiroshi Ishibashi
    • 4
  • Isao Kawaguchi
    • 5
  • Hiroki Ohwaki
    • 6
  • Takehiro Takemasa
    • 1
  • Koji Arizono
    • 3
  1. 1.School of Science and TechnologyNagasaki UniversityNagasakiJapan
  2. 2.Faculty of Human EnvironmentNagasaki Institute of Applied ScienceNagasakiJapan
  3. 3.Faculty of Environmental and Symbiotic SciencePrefectural University of KumamotoKumamotoJapan
  4. 4.Center for Marine Environmental StudiesEhime UniversityMatsuyamaJapan
  5. 5.Osaka Carbon Steel Co. Ltd.SaseboJapan
  6. 6.Industrial Technology Center of NagasakiOmuraJapan

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