Under what conditions would the pre-treatment capabilities of a reverse osmosis freshwater generator MOST likely be overloaded, and as a result, these conditions should generally be avoided?
• Reverse osmosis (RO) pre-treatment is designed to remove suspended solids, silt, and organics before the RO membranes. • Water quality differences between harbors, open sea, and temperature changes (cold vs warm water). • How turbidity, pollution, and biological load** affect filters and pre-treatment units.
• In which of these four conditions is seawater usually the dirtiest, with the most suspended solids, silt, oil, and contamination? • Under what kind of conditions would filters clog fastest and require the most backwashing or cartridge changes? • Do temperature changes alone (cold vs hot water) usually add a lot of dirt or silt, or mainly change RO efficiency and output?
• Identify which option typically has highest turbidity and pollution levels. • Consider when the intake strainers, filters, and dosing systems would be working the hardest to keep contaminants away from the RO membranes. • Eliminate any options where the main change is only temperature, not a big increase in suspended solids or contaminants.
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