Effects of Components and Operating Conditions on Fused Phosphate Fertilizer Production Using Sewage Sludge Incineration Ash

• Iwai Yoshihiro

  Sanki Engineering Co., Ltd

• Jozuka Tetsuji

  Sanki Engineering Co., Ltd

• Kobayashi Takeshi

  Yokohama National University

• Kameya Takashi

  Yokohama National University

• Miyake Yuichi

  Yokohama National University

• Komatsu Takashi

  Sanki Engineering Co., Ltd

• Takagi Tadashi

  Sanki Engineering Co., Ltd

• Mishina Fumio

  Nippon Jikkou Co., Ltd

Bibliographic Information

Other Title

• 下水汚泥焼却灰を原料とした熔成リン酸質肥料製造における各種成分比と溶融条件の影響
• ゲスイ オデイ ショウキャクバイ オ ゲンリョウ ト シタ ヨウセイリンサンシツ ヒリョウ セイゾウ ニ オケル カクシュ セイブンヒ ト ヨウユウ ジョウケン ノ エイキョウ

Abstract

The concentrations of the main and hazardous components of 26 sewage sludge ashes collected from 14 incineration facilities were determined in order to evaluate the practicality of making phosphate fertilizer from sewage sludge ash. Results indicated that sewage sludge ash is one practical source for making fused phosphate fertilizer. However, due to the high concentrations of hazardous components in the sewage sludge ashes, a fusing process for sewage sludge ashes was needed to remove the hazardous components from them.<BR>Two sewage sludge ashes with appropriate amounts of additives (MgO and CaO) were subjected to fusing processes in an electric resistance furnace, and then crushed by immediate water-cooling. The fused phosphate fertilizer made from the two sewage sludge ashes had high solubilities of over 95% for P₂O₅ and MgO in citric acid. The mol ratios of P₂O₅, MgO, and CaO in the fused phosphate fertilizer were comparable to those of commercial fused phosphate fertilizers (P₂O₅:MgO:CaO=1:2.5-3.5:2.5-3.5). In addition, except for copper, the concentrations of hazardous components in the fused phosphate fertilizer were lower than that before the fusing processes and lower than the Japanese standard values.

Journal

• Journal of the Japan Society of Material Cycles and Waste Management

  Journal of the Japan Society of Material Cycles and Waste Management 20 (3), 203-216, 2009

  Japan Society of Material Cycles and Waste Management

Keywords

• sewage sludge
• incineration ash
• phosphate fertilizer
• fusing process
• hazardous element

Details

• CRID: 1390001205315409920
• NII Article ID: 10024885652
• NII Book ID: AA12384878
• DOI: 10.3985/jjsmcwm.20.203
• ISSN: 18835899
• ISSN: 18835856
• NDL BIB ID: 10267463
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10267463
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed