Does anyone have experience with the NF polyamide spiral wound membrane for removing methylene blue from water and cleaning the membrane?

07 July 2013 1 8K Report

Tried cleaning the membrane several times with HCl, but there is still some concentration of the dye present in the permeate as well as reject.

W.J. Lau

Before I can answer you question, I need more information as follows.

(1) What are the properties of the NF membrane you used? What is the MWCO and surface charge density?

(2) What is the concentration of the methylene blue in the water? Does it snythetic solution or industrial effluent?

(3) What are the operating conditions?

I hope it is still not too late to ask you since you have posted the question in Jul 2013.

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