Chemical Engineering - Environmental Engineering - Discussion

Discussion Forum : Environmental Engineering - Section 1 (Q.No. 47)
47.
Pick out the wrong statement.
Caustic embrittlement of boiler's metallic parts is caused by high concentration of caustic soda in boiler feed water.
Cooling and freezing of water kills the bacteria present in it.
With increasing boiler operating pressure of steam, the maximum allowable concentration of silica in feed water goes on decreasing.
Dissolved oxygen content in high pressure boiler feed water should be nil.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
1 comments Page 1 of 1.

Nishant said:   6 years ago
Freezing does damage living cells, mostly because water expands when freezing, and ice crystals can break the cell walls. Thus, some bacteria will be killed by freezing.

If your goal is to kill off most microorganisms, boiling may be an easy alternative (and may even require less energy use than freezing).

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