What is the best method for cleaning ceramic membranes?

02 February 2016 1 877 Report

I am using ceramic membranes of 100 and 200 nm pore size for separation of oil from produced water of 500 ppm oil. There are many methods in literature. I want the simplest method using NaOH solution.

Feng Wang

Cleaning Procedure

1. Wash membrane with a 15-20g/L alkaline cleaning solution of sodium hydroxide (NaOH) at a temperature of 85° C

for 30 minutes.

2. Rinse membrane with water until pH returns to neutral.

3. For MF-UF membranes, wash membrane with a 5ml/L acid solution of nitric acid (HNO3) or solution of 75%

phosphoric acid (H3PO4) at a temperature of 50° C for 15 min. For NF membranes, wash with a 1ml/L acid solution of

75% phosphoric acid (H3PO4) at a temperature of 50° C for 15 min.

4. Rinse membrane

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