A. In freshly produced sewage
B. At sewer pipes
C. In sewer treatment plants
D. None of these
Correct Answer: In freshly produced sewage ✔
Last Updated: August 25, 2020
A. In freshly produced sewage
B. At sewer pipes
C. In sewer treatment plants
D. None of these
Correct Answer: In freshly produced sewage ✔
Last Updated: August 25, 2020