OIL-CONTAINING WASTEWATER TREATMENT SYSTEM

摘要

PROBLEM TO BE SOLVED: To simplify devices by efficiently combining dissimilarities of respective steps used in an oil-containing wastewater treatment system.

SOLUTION: A separation tank for floating and separating an oil content is disposed in a supply path of raw water produced from oil-containing wastewater, and a membrane filtration tank is disposed downstream from the separation tank, the membrane filtration tank including a membrane separation module consisting of a hollow fiber membrane or a flat membrane disposed therein and a diffuser for generating air bubbles installed below the membrane separation module. A supply pipe provided with a circulating pump in the middle thereof to supply the raw water from the separation tank to the membrane filtration tank, and a return pipe for returning unfiltered water containing the oil content and the air bubbles from the membrane filtration tank to the separation tank are also provided.

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