Civil Engineering > GATE 2016 SET-1 > Wastewater Treatment
Match the items in Group - I with those in Group - II and choose the right combination.
| Group - I | Group - II |
|---|---|
| P. Activated sludge process | 1. Nitrifiers and denitrifiers |
| Q. Rising of sludge | 2. Autotrophic bacteria |
| R. Conventional nitrification | 3. Heterotrophic bacteria |
| S. Biological nitrogen removal | 4. Denitrifiers |
Correct : a
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