WASTE WATER TREATMENT METHOD AND APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a waste water treatment method and apparatus by which treated water made low in organic concentration and dissolved ion concentration is easily obtained.

SOLUTION: The waste water treatment method includes: an anaerobic treatment step of treating waste water containing the organic material in an anaerobic biological reaction tank 1; an osmosis membrane separation step of separating an anaerobically treated liquid in the anaerobic treatment step into a permeated liquid and a concentrated liquid by an osmosis membrane 2a; a reverse osmosis membrane separation step of introducing the permeated liquid in the osmosis treatment step into a reverse osmosis membrane separation device 5 and separating the permeated liquid into treated water and concentrated water by a reverse osmosis membrane 5a.

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