Treatment of Photographic Wastewater with Combined Process of Electrochemical and Biological Methods.

• TAKEUCHI Masami

  Department of Chemical and Biological Engineering, Ube National College of Technology

• MURAKAMI Sadaaki

  Department of Chemical and Biological Engineering, Ube National College of Technology

• KITAO Takane

  Department of Architecture and Civil Engineering, Toyohashi University of Technology

Bibliographic Information

Other Title

• 電解処理による写真廃液の生分解性への改質と生物処理に関する研究
• デンカイ ショリ ニ ヨル シャシン ハイエキ ノ セイブンカイセイ エ ノ カイシツ ト セイブツ ショリ ニ カンスル ケンキュウ

Abstract

Photographic wastewater bears high levels of pollutants being composed of various organic and inorganic chemicals which are difficult to be reduced to the levels permitted for discharge with a single biological or chemical method. The authors have proposed a three-stage treatment system of the 1st biological, chemical and 2nd biological process. The purpose of the chemical stage is to reform the refractory chemicals into biodegradable ones. In this study, electrochemical oxidation with a ferrite anode is applied to the chemical stage to improve their biodegradabilities.<br>Electrolysis of the photographic wastewater, which had been biologically treated at the 1st stage, enhanced BOD of the wastewater. Mechanism has been discussed on the upgrade in biodegradabilities of chemicals, used in photographic processing, by electrochemical oxidation. The 1st biological-electrochemical-2nd biological process removed 95% in COD; the contributions to COD removal were 42%, 11% and 42% by 1st biol., electro. and 2nd biol. stages, respectively. 48% of TN was removed and 94% among the remaining N-compounds was NO₃^-. The principal process for COD removal from photographic wastewater have been established, but the additional N removal process is necessary to discharge the processed wastewater into the N regulated water bodies.

Journal

• Journal of Japan Society on Water Environment

  Journal of Japan Society on Water Environment 22 (4), 313-319, 1999

  Japan Society on Water Environment

Keywords

• photographic wastewater
• refractory chemicals
• electrochemical treatment
• upgrade of biodegradability
• biological treatment

Details

• CRID: 1390282680058304640
• NII Article ID: 10004452136
• NII Book ID: AN10372439
• DOI: 10.2965/jswe.22.313
• COI: 1:CAS:528:DyaK1MXksVWqsrY%3D
• ISSN: 18813690
• ISSN: 09168958
• NDL BIB ID: 4693102
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4693102
• Web Site: https://www.jstage.jst.go.jp/article/jswe/22/4/22_4_313/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed