Q.1.
Which of the following is the main source for eutrophication of surface water?
Q.2.
Amino nitrogen and heterocyclic nitrogen can be degraded by biological method by first converting it into ______________
Q.3.
Which of the following process is not involved in the removal of nitrogen?
Q.4.
Autotrophic nitrification leads to formation of nitrate by conversion of ammonia.
Q.5.
Which of the following is not an after effect of accumulation of nitrogen and phosphorus in aquatic ecosystem?
Q.6.
Which of the following genera the nitrifying bacteria doesn’t belong to?
Q.7.
The optimal removal of phosphate by biological method should have a COD/P ratio ofCOD/g of phosphate.
Q.8.
Ferrous ions can supplement biological phosphate removal.
Q.9.
Expand OLNAD.
Q.10.
The major disadvantage of heterotrophic nitrification is ____________ for final disposal.