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20 <br />Appendix 5 – Chemical Cleaning and Storage Procedures <br /> <br /> <br /> General Guidelines: <br />In most cases, it is unnecessary to clean the membrane surface. The biofilm that naturally develops on <br />the membrane is essential to the process, contributing to biological treatment. It's undergoing regular <br />replacement as part of the system's normal operation. <br /> <br /> Purpose of Chemical Cleaning: <br />Chemical cleaning may be used either to restore the membrane to a condition similar to its original state <br />or preliminary stage for dismantling and storage. <br /> <br /> Restarting the MABR After Cleaning: <br />Upon immediate restarting the MABR system after cleaning, the biofilm will typically regenerate and <br />redevelop within a few weeks when proper conditions will be maintained. <br /> <br /> Dismantling and Storage of the MABR After Cleaning: <br />After the cleaning, the system can be shut down for a long period on-site or removed from the site. <br />However, it is important to note that prolonged or improper storage conditions may negatively and <br />irreversibly impact the MABR functionality. <br /> <br /> Important Note: <br />Chemical cleaning and storage are not part of the MABR reactor's normal lifecycle. Therefore, it is <br />recommended to consult the Fluence Service Department before initiating such procedures to ensure <br />proper handling and minimize potential damage to the membrane. <br /> <br /> <br />