| abstract |
A method for cleaning a filter used in a seawater desalination process, the desalination process comprises a first filtration step of microfiltration or ultrafiltration to seawater (3), and a reaction to the seawater (4) after the first filtration step. The second filtration step of the osmotic treatment, in the cleaning method of the filter, the filter is the microfiltration membrane or ultrafiltration membrane (41) used in the first filtration step, and at any stage of the cleaning method, to An iron compound is added to the seawater (3), and the cleaning method includes a cleaning chemical liquid preparation step of preparing a cleaning chemical liquid (1), and contacting a filter with the cleaning chemical liquid (1) to remove the attachment of the filter. The removal step, in the cleaning liquid preparation step, mixes the seawater (4) after the first filtration step with at least hydrogen peroxide to prepare a cleaning liquid (1 ). |