PHOSPHORUS RECOVERY MATERIAL FOR PHOSPHORUS-CONTAINING WATER AND PHOSPHORUS RECOVERY METHOD USING THE PHOSPHORUS RECOVERY MATERIAL

PROBLEM TO BE SOLVED: To provide a phosphorus recovery material containing calcium and silicon that is low in production raw material cost, can be produced under a non-heating condition, has good reactivity with phosphorus in wastewater, and has good settleability of an aggregate formed by reacting...

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Bibliographische Detailangaben
Hauptverfasser:	HORIUCHI MINORU, NISHI SEIJI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a phosphorus recovery material containing calcium and silicon that is low in production raw material cost, can be produced under a non-heating condition, has good reactivity with phosphorus in wastewater, and has good settleability of an aggregate formed by reacting with and absorbing phosphorus, and to provide a method for recovering phosphorus from wastewater using the phosphorus recovery material.SOLUTION: We have found that after a phosphorus recovery material consisting of a composition containing an acid salt of calcium obtained by treating calcium other than a strong acid salt of calcium in an inexpensive calcium and silicon-containing composition with a strong acid under a non-heating condition, and having a molar ratio Ca/Si of 0.2-5.0 is reacted with phosphorus-containing wastewater, a phosphorus-absorbed product can be quickly precipitated. 【課題】製造原料が安価で非加熱下に製造でき、排水中のリンとの反応性が良く、かつリンと反応及び吸着して形成した凝集体の沈降性に優れているカルシウム及びケイ素含有リン回収材及びそれを用いた排水からのリン回収方法を提供する。【解決手段】安価なカルシウム・ケイ素含有組成物を、非加熱下にカルシウム強酸塩以外のカルシウムを強酸で処理したカルシウムの酸塩を含む組成物で、Ｃａ／Ｓｉモル比が０．２〜５．０であるリン回収材が、リン含有排水と反応させた後、リン吸着物を速やかに沈降させることができることを見出した。【選択図】なし