Sequentially arrange the stepwise process of wastewater treatment:
A. Primary sedimentation
B. Screening and Grit removal
C. Disinfection
D. Secondary treatment unit and Secondary Sedimentation
Choose the most appropriate answer from the options given below:
Sequentially arrange the stepwise process of wastewater treatment:
A. Primary sedimentation
B. Screening and Grit removal
C. Disinfection
D. Secondary treatment unit and Secondary Sedimentation
Choose the most appropriate answer from the options given below:
Show Hint
- B, A, C, D
- A, C, B, D
- B, A, D, C
- C, B, D, A
The Correct Option is C
Solution and Explanation
Step 1: Screening and Grit removal.
The first step in wastewater treatment is preliminary treatment, which involves screening and grit removal (B).
Step 2: Primary sedimentation.
This removes settleable solids and reduces suspended matter (A).
Step 3: Secondary treatment and secondary sedimentation.
Biological treatment is applied next, followed by secondary sedimentation to remove biomass (D).
Step 4: Disinfection.
Finally, treated wastewater undergoes disinfection before disposal or reuse (C).
Step 5: Conclusion.
Thus, the correct sequence is B → A → D → C. Correct answer is (C).
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