Method for treating nonionic surfactant-containing water, and water treatment method
A surfactant and treatment method technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as non-ionic surfactant pollution
Pending Publication Date: 2020-01-07
KURITA WATER INDUSTRIES LTD
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Membrane performance can be restored by cleaning the RO membrane. However, in order to clean the RO membrane, the RO membrane treatment device must be stopped. When the pollution caused by the nonionic surfactant is serious, the RO membrane treatment device will be stopped frequently.
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1-1
[0080] The MCE-M membrane was set on a plastic holder PFA-47 manufactured by Gaoke Industrial Co., Ltd., and 10 mL of a 100 mg / L POEOPE aqueous solution as raw water was filtered three times, and the POEOPE concentration of each filtrate was measured. Next, 10 mL of a 0.15% by weight SDS aqueous solution adjusted to pH 12 by sodium hydroxide (6N solution) as a desorption solution was permeated through 10 mL of the MF membrane having POEOPE adsorbed by the permeation of the nonionic surfactant aqueous solution, and the measured POEOPE concentration of the resulting filtrate.
Embodiment 1-2
[0082] Except having used the PES film as the MF film, it carried out similarly to Example 1-1.
Embodiment 1-3
[0084] Except having used a PVDF membrane as an MF membrane, it carried out similarly to Example 1-1.
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Abstract
Provided is a method for treating nonionic surfactant-containing water, the method comprising an adsorption step for passing nonionic surfactant-containing water as supplied water through a microfiltration membrane or ultrafiltration membrane, to obtain the filtrate having a reduced nonionic surfactant concentration as treated water, and a desorption step for bringing at least one of an alkali agent, an anionic surfactant, and an oxidizing agent into contact with the microfiltration membrane or ultrafiltration membrane, to desorb the nonionic surfactant adsorbed by the filtration membrane. Also provided is a water treatment method comprising subjecting the treated water to a permeable membrane treatment.
Description
technical field [0001] The present invention relates to a method for treating nonionic surfactant-containing water to remove nonionic surfactant from water containing nonionic surfactant. Moreover, this invention relates to the water treatment method which performs reverse osmosis (RO) membrane process the water which removed the nonionic surfactant by the processing method of the nonionic surfactant containing water of this invention. Background technique [0002] Non-ionic surfactants are often contained in the washing and drainage of the electronics industry or the transportation machinery industry. Nonionic surfactants are low-molecular compounds that are difficult to decompose, and are difficult to remove even by coagulation treatment or biological treatment. Nonionic surfactants can be eliminated by RO membranes, but they are pollutants that reduce the permeate flux (permeate flux) of polyamide-based RO membranes that have become mainstream in recent years. Therefore,...
Claims
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IPC IPC(8): C02F1/44B01D15/00B01D61/04B01D61/14B01D61/58B01D65/06B01D71/16B01D71/18B01D71/34B01D71/36B01D71/68B01J20/24B01J20/26C02F1/28
CPCB01D15/00B01D61/04B01D61/14B01D61/58B01D65/06B01D71/16B01D71/18B01D71/34B01D71/36B01D71/68B01J20/24B01J20/26C02F1/28C02F1/44Y02A20/131C02F1/444B01D65/02C02F1/441C02F1/58B01D61/145B01D61/147B01D61/025C02F1/285C02F1/286
Inventor 川胜孝博岩见贵子
Owner KURITA WATER INDUSTRIES LTD