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MOMO Membrane Scaling
RO Chemicals
All reverse osmosis (RO) feed waters are different in ionic composition.
All reverse osmosis (RO) feed waters are different in ionic composition. As a result, different types of scale may deposit on the membranes if the correct antiscalant is not used. Selecting the right antiscalant and cleaning chemicals will optimise operating efficiency and help to prevent plant failure.
Below we list some of the most common types of scales that we have identified on RO membranes during autopsy procedures and the appropriate chemicals to use.
Antiscalant: Genesys LF
Application: Calcium Carbonate is the most common scale found in membranes. Appears as an off white powder. Easily cleaned with a strong acid product.
Cleaners: Genesol 37 and 38
Antiscalant: Genesys SI
Application: Silica - can be present on a membrane as colloids, aluminosilicates on the lead membrane elements, or as scale on the final elements. Both forms are difficult to remove, being dependent on pH and temperature.
Cleaners: Genesol 40 or 703, depending on colloidal or silica scale
Antiscalant: Genesys CAS
Calcium sulphate (gypsum) - crystalline structure with very sharp blade-like features, which cut the membrane surface. Common occurrence in areas where there is a natural sulphate content in the underlying geology. This makes it very difficult to clean.
Cleaners: Genesol 50, 34 and 703. Difficult to clean - ask us for advice on cleaning protocol design
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