METHOD FOR TREATING HEAVY METAL-CONTAINING WASTE WATER

PROBLEM TO BE SOLVED: To detoxify waste water containing heavy metals such as nickel, ammonia and magnesium and produced from a boiler facility, etc. SOLUTION: The nickel in the waste water is removed by mixing a water-soluble sulfide with the waste water without being brought into contact with oxyg...

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Main Authors NAGAYASU HIROTSUGU, KAWAGUCHI TOMOHIRO, TAKEUCHI YOSHIYUKI, YAGI YASUYUKI, FUJIWARA HIROYUKI, KOJIMA NOBUO, MORIGUCHI KEIKO
Format Patent
LanguageEnglish
Published 22.07.2003
Edition7
Subjects
CHEMISTRY
METALLURGY
MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PROBLEM TO BE SOLVED: To detoxify waste water containing heavy metals such as nickel, ammonia and magnesium and produced from a boiler facility, etc. SOLUTION: The nickel in the waste water is removed by mixing a water-soluble sulfide with the waste water without being brought into contact with oxygen while keeping the nickel-containing waste water in a state of pH 9.5 or below and removing a produced precipitate. COPYRIGHT: (C)2003,JPO
Bibliography:Application Number: JP20020005586