METHOD AND APPARATUS FOR PRODUCING PURE WATER

PROBLEM TO BE SOLVED: To effectively remove aluminum contained in raw water, so that the quality of pure water can be improved and residual aluminum can be prevented from sticking to a membrane treatment unit of a succeeding stage. SOLUTION: The method for producing pure water comprises: an aluminum...

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Hauptverfasser:	AMAYA TORU, YAMAKI YOSHITAKA
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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creator	AMAYA TORU YAMAKI YOSHITAKA
description	PROBLEM TO BE SOLVED: To effectively remove aluminum contained in raw water, so that the quality of pure water can be improved and residual aluminum can be prevented from sticking to a membrane treatment unit of a succeeding stage. SOLUTION: The method for producing pure water comprises: an aluminum removal step of adding an iron-based inorganic polymer flocculant such as ferric polysulfate and a polysilica-ferric oxide adduct to the raw water, which has been treated with an aluminum-based flocculant, in a flocculation and sedimentation unit 2 to remove residual aluminum; and a membrane treatment step of making the treated water via the aluminum removal step pass through the membrane treatment unit 4. COPYRIGHT: (C)2008,JPO&INPIT
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subjects	CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
title	METHOD AND APPARATUS FOR PRODUCING PURE WATER
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