For the successful operation of a reverse...

Question 1 / 205eccef9cbacbc34ba4d458c7

Question 1 of 205eccef9cbacbc34ba4d458c7

For the successful operation of a reverse osmosis fresh water generator, the setting of the brine back pressure regulator is critical. What statement regarding the set point of this regulator is true?

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🔍 Key Concepts

• Reverse osmosis (RO) basics – how pressure affects water flow through the membrane and brine flow across the membrane surface • Brine back pressure regulator – its role in maintaining correct operating pressure and flow across the membrane to prevent damage or fouling • Relationship between pressure, flow, and permeate (fresh water) production in an RO system

💭 Think About

• Think about what happens to the membrane surface if the brine flow becomes too slow versus when it is kept at a healthy sweeping velocity • Consider how very high pressure on the concentrate (brine) side might affect the mechanical integrity of the membrane elements • Ask yourself: in an RO unit, do you usually increase or decrease pressure to get more fresh water, and what side effect does that have on the membrane?

✅ Before You Answer

• Verify what too low brine back pressure does to the brine flow rate over the membrane surface (and how that relates to fouling vs. damage) • Verify what too high brine back pressure does to overall system pressure and risk to the membrane modules (and how that affects fresh water output) • Confirm the usual relationship: as operating pressure goes up, how does permeate (fresh water) production change in a properly functioning RO unit?

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Question 1 of 20

If the regulator setting is set too high, the membrane modules may be damaged. If the regulator setting is too low, the fresh water production will be too low.

If the regulator setting is set too low, the membrane modules may become fouled. If the regulator setting is too high, the fresh water production will be too low.

If the regulator setting is set too high, the membrane modules may become fouled. If the regulator setting is too low, the fresh water production will be too low.

If the regulator setting is set too low, the membrane modules may be damaged. If the regulator setting is too high, the fresh water production will be too low.

Question 1 / 205eccef9cbacbc34ba4d458c7

Question 1 of 205eccef9cbacbc34ba4d458c7

Back

Question 1 of 20

5eccef9cbacbc34ba4d458c7

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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