A method and system for optimizing membrane cleaning process

摘要

The invention related to the field of reverse osmosis separation process used for desalination and waste water reuse process. More particularly, the invention relates to a method and system for estimating the effectiveness of the membrane cleaning. In the membrane cleaning process, cost effective operation and minimal membrane degradation due to use of antiscalant cleaning chemicals are desired. The invention provides a method for managing reverse osmosis membrane cleaning process in a plant performing desalination or waste water reuse by operating the reverse osmosis membrane cleaning process for a controlled time for cleaning and with a controlled value of chemical concentration in a chemical liquor prepared for cleaning the membrane. The method comprises the steps of estimating fouling status of the membrane (140) and determining controlled value of chemical concentration needed (160) in the chemical liquor and the controlled time needed for cleaning based on the fouling status of the membrane. A system using the method and a technique for optimal functioning and operation of the cleaning process are also provided.