Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 12 (Q.No. 26)
26.
What is the predominating coagulation mechanism for raw water having high turbidity and high alkalinity?
Discussion:
3 comments Page 1 of 1.
Phani said:
7 years ago
C is the correct option.
Sadashiva said:
7 years ago
Option (C) is correct.
The coagulation of metallic salts releases hydrogen ions as well as coagulant species. These hydrogen ions neutralize alkalinity. In water with high turbidity and high alkalinity the pH will be relatively unaffected by coagulant addition. Because of the high alkalinity, absorption and charge neutralization will be less effective than in waters of low alkalinity. Higher coagulant dosage should be used sweep coagulation.
The coagulation of metallic salts releases hydrogen ions as well as coagulant species. These hydrogen ions neutralize alkalinity. In water with high turbidity and high alkalinity the pH will be relatively unaffected by coagulant addition. Because of the high alkalinity, absorption and charge neutralization will be less effective than in waters of low alkalinity. Higher coagulant dosage should be used sweep coagulation.
Priyanka said:
5 years ago
C is correct
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