MAP (magnesium ammonium phosphate) Crystallization for Phosphorus Removal from Side Streams.

• HARADA Hiroyuki

  Department of Civil engineering and architecture, Kumamoto University

• HIROTA Ryuji

  Kumamoto Institute of Sewage Treatment

• MURAO Yuji

  Kumamoto Institute of Sewage Treatment

• FUJII Masahiro

  YUNITIKA LTD.

• MATUSHITA Tomohiro

  YUNITIKA LTD.

Bibliographic Information

Other Title

• 返流水のＭＡＰ法を用いた処理

Abstract

A magnesium ammonium phosphate (MAP) crystallization process that works by addition of magnesium seed crystals was used to phosphorus (PO₄-P<50g·m^-3) removal from side streams from sludge dewatering and thickening processes. Using a bench scale reactor, which consisted of a bubble column with draught and settling tubes, the optimum operational conditions were determined to be: reaction time 2hr, pH 8.9-9.1, molar ratio of Mg/P = 1.0 and an excess of NH₄-N, under these conditions the maximum amount of crystallization occurred.

Journal

• ENVIRONMENTAL ENGINEERING RESEARCH

  ENVIRONMENTAL ENGINEERING RESEARCH 39 297-306, 2002

  Japan Society of Civil Engineers

Keywords

• Side Stream
• Phosphorus Removal
• Crystallization
• Phosphorus
• Bubble Column Reactor

Details

• CRID: 1390282679088625024
• NII Article ID: 130003949322
• DOI: 10.11532/proes1992.39.297
• ISSN: 1884829X
• ISSN: 13415115
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed