GATE Civil Engineering (CE) 2016 Shift 1 Solved Paper

Match the items in Group – I with those in Group – II and choose the right combination.
Group - I
P. Activated sludge process
Q. Rising of sludge
R. Conventional nitrification
S. Biological nitrogen removal
Group - II
1. Nitrifiers and denitrifiers
2. Autotrophic bacteria
3. Heterotrophic bacteria
4. Denitrifiers