Title:
METHOD AND APPARATUS FOR PURIFYING EMULSIFIED OIL-CONTAINING WASTE WATER
Document Type and Number:
Japanese Patent JP2023058187
Kind Code:
A
Abstract:
To purify emulsified oil-containing waste water to a higher level than before.SOLUTION: There is provided a purification method for recovering water from emulsified oil-containing waste water containing oil-in-water emulsion and separated oil not constituting emulsion, the method including: adding a flocculating agent to the emulsified oil-containing waste water to flocculate and remove the separated oil; adding an oil-water separating agent to the emulsified oil-containing waste water to break the emulsion; bringing the emulsified oil-containing waste water that has undergone flocculation and emulsion breakage into contact with activated charcoal so as to remove oil separated by the emulsion breakage by adsorption on the activated charcoal; and removing impurities by passing the emulsified oil-containing wastewater that has undergone the adsorption process through a reverse osmosis membrane. Prior to the adsorption step, a neutralizing agent may be added to the emulsified oil-containing waste water that has undergone the emulsion breaking step to bring pH of the emulsified oil-containing waste water closer to neutrality.SELECTED DRAWING: Figure 1
Inventors:
TAKENO TAKAHIRO
Application Number:
JP2021168023A
Publication Date:
April 25, 2023
Filing Date:
October 13, 2021
Export Citation:
Assignee:
SANGO CO LTD
International Classes:
C02F1/44; B01D17/05; B01D61/04; C02F1/28; C02F1/42; C02F1/52; C02F9/00
Attorney, Agent or Firm:
Patent Attorney Corporation Prospec Patent Office