Effects of MgCl₂ Addition on Struvite Precipitation and Ammonia Emission during the Early Stage of Composting

• MAEDA Takeki

  Iwate University, Faculty of Agriculture

• SAKUMA Masaki

  Iwate University, Faculty of Agriculture

• KUDO Hiroaki

  Iwate University, Faculty of Agriculture

• TATEISHI Takahiro

  Iwate University, Faculty of Agriculture

• TSUIKI Mikinori

  Iwate University, Faculty of Agriculture

• MIYATAKE Fumihito

  Obihiro University of Agriculture and Veterinary Medicine

• IWABUCHI Kazunori

  Graduate School of Agriculture, Hokkaido University

• MAEDA Kouki

  Hokkaido Agricultural Research Center

Bibliographic Information

Other Title

• 塩化マグネシウムの添加が堆肥化早期のstruvite生成とアンモニア揮散とに及ぼす影響
• エンカ マグネシウム ノ テンカ ガ タイヒカ ソウキ ノ struvite セイセイ ト アンモニアキサン ト ニ オヨボス エイキョウ

Abstract

The effects of MgCl₂ addition to composting material on struvite precipitation and ammonia emission were investigated. Beef cattle manure was used as the composting material and the 15-day composting process was carried out in a small-size reactor. When the rate of MgCl₂ addition was increased, the pH of the initial material decreased and the electrical conductivity increased. In addition, the degradation rate of volatile matter decreased to 63 % of that without addition of MgCl₂ when the addition rate was 0.4 mole per kg of initial dry manure (mol kg_DM0^-1). An increase in struvite nitrogen was observed after MgCl₂ addition at 0.03 mol kg_DM0^-1 (MgCl₂ additon: 0.1 mol kg_DM0^-1) ~0.07 (MgCl₂ additon: 0.4 mol kg_DM0^-1), and the utilization rate of Mg from additional MgCl₂ for struvite precipitation was calculated to be 34-16 %. Ammonia emission after 0.4 mol kg_DM0^-1 MgCl₂ addition decreased to 70 % of that without MgCl₂ addition. These results suggest that, following the addition of MgCl₂ to composting material pH reduction had a greater effect on the reduction of ammonia emission than did the increase in struvite precipitation.

Journal

• Nogyo Shisetsu (Journal of the Society of Agricultural Structures, Japan)

  Nogyo Shisetsu (Journal of the Society of Agricultural Structures, Japan) 44 (3), 100-106, 2013

  The Society of Agricultural Structures, Japan

Keywords

• struvite
• ammonium magnesium phosphate (MAP)
• chemical additives
• ammonia emission
• composting

Details

• CRID: 1390015897173405696
• NII Article ID: 10031203281
• NII Article ID: 220000158560
• NII Book ID: AN00201054
• DOI: 10.11449/sasj.44.3_100
• ISSN: 21860122
• ISSN: 03888517
• NDL BIB ID: 024911047
• Web Site: https://agriknowledge.affrc.go.jp/RN/2030870267
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024911047
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Allowed