COAGULATION TREATMENT METHOD FOR COLORED WASTE WATER

PROBLEM TO BE SOLVED: To provide a coagulation treatment method capable of drastically reducing chromaticity and obtaining good treated water in coagulation treatment of colored waste water.SOLUTION: Inorganic coagulant and amidine-based coagulant are added to and mixed with the colored waste water...

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Bibliographische Detailangaben
Hauptverfasser:	NAGAMINE ATSUSHI, TANABE SHIGERU
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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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a coagulation treatment method capable of drastically reducing chromaticity and obtaining good treated water in coagulation treatment of colored waste water.SOLUTION: Inorganic coagulant and amidine-based coagulant are added to and mixed with the colored waste water and pH control to a range of 5.0-7.0 is performed as necessary. Then, polymer coagulant is added to generate coagulation flock. Next, solid-liquid separation of the generated coagulation flock is performed. In this favorable embodiment, the polymer coagulant is anionic or non-ionic polymer coagulant including a sulfonic acid group, and consecutive addition is performed when the polymer coagulant is added to generate the coagulation flock.