PHOSPHORUS RECOVERY MATERIAL AND PHOSPHORUS RECOVERY METHOD

• Main Authors: MEIDO TAKESHI, YANAGIYA SHOHEI, IMAI TOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 28.04.2016
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To provide a phosphorus recovery material that an elimination factor of phosphorus is high, and can recovery phosphorus with a form that is easy to reuse as a raw material of phosphate-based fertilizer.SOLUTION: A phosphorus recovery material contains amorphous sodium silicate provided by heating blended charges containing silicic acid sources, sodium sources and calcium sources at 250-800°C. A mole ratio of Ca/Si in the phosphorus recovery material is 0.8-2.0, and the mole ratio of Si/Na is 2.0-5.0.SELECTED DRAWING: None 【課題】本発明は、リンの除去率が高く、リン酸質肥料の原料として再利用しやすい形態でリンを回収することができるリン回収材等を提供する。【解決手段】本発明のリン回収材は、ケイ酸源、ナトリウム源、およびカルシウム源を含む混合原料を２５０〜８００℃で加熱して得られる非晶質ケイ酸ナトリウムを含むリン回収材であって、該リン回収材中のＣａ／Ｓｉのモル比が０．８〜２．０、およびＳｉ／Ｎａのモル比が２．０〜５．０であるリン回収材である。【選択図】なし