Removal of Low Concentrated Cadmium Ions Using Fixed-bed Sulfate-Reducing Bioreactor with FS Carrier

• HAYASHI Hiroshi

  Department of Chemical Engineering, Waseda University

• SYOGASE Nobukazu

  Department of Environment and Resources Engineering, Waseda University

• TSUNEDA Satoshi

  Department of Chemical Engineering, Waseda University

• HIRATA Akira

  Department of Chemical Engineering, Waseda University

• SASAKI Hiroshi

  Department of Environment and Resources Engineering, Waseda University

Bibliographic Information

Other Title

• スラグウールを付着担体とする固定床型硫酸還元バイオリアクターによる希薄廃水からのカドミウム回収
• スラグウール オ フチャク タンタイ ト スル コテイショウガタ リュウサン カンゲン バイオリアクター ニ ヨル キハク ハイスイ カラ ノ カドミウム カイシュウ

Abstract

Recovery of heavy metal ions from their low concentrated water is developed using the activity of sulfate-reducing bacteria immobilized on a fibrous slag (FS), which was employed as both bio-carrier and particle collector medium. An up-flow type bioreactor was composed of FS packed column, where sulfate-reducing bacteria (SRB) was immobilized at a lower part. In this process, sulfate ion (SO₄^2-) in the liquid is biologically converted to hydrogen sulfide (H₂S), which reacts with metal ionic species to produce ultrafine metal sulfide particles. Subsequently, formed particles are collected onto the FS surface in the upper part of the reactor, thereby accumulating heavy metals ions as their sulfides precipitates. In the continuous treatment of water contaminated with 6 mg / l of cadmium, almost complete removal was carried out throughout the operating period, approximately 30 days. Cadmium sulfide precipitates gradually accumulated on the FS bed, and finally total amount of cadmium sulfide recovered reached 27.3 mg per unit gram of FS. The experimental result indicated that the proposed bioreactor, Sulfate-Reducing Bioreactor with Fibrous Slag carrier (SRB-FS), served as an efficient heavy metal recovery column with the aid of SRB.

Journal

• Shigen-to-Sozai

  Shigen-to-Sozai 119 (9), 559-563, 2003

  The Mining and Materials Processing Institute of Japan

Keywords

• Heavy Metal Ion
• Fibrous Slag
• Sulfate-Reducing Bacteria
• Bioreactor
• Solid / Liquid Separation

Details

• CRID: 1390001206048749056
• NII Article ID: 10011754388
• NII Book ID: AN10062646
• DOI: 10.2473/shigentosozai.119.559
• COI: 1:CAS:528:DC%2BD3sXnvVaisbs%3D
• ISSN: 18806244
• ISSN: 09161740
• NDL BIB ID: 6715103
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6715103
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed