Total Kjeldahl Nitrogen (TKN) concentration (mg/L as N)

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Total Kjeldahl Nitrogen (TKN) concentration (mg/L as N) in domestic sewage is the sum of the concentrations of:

1. Organic and inorganic nitrogen in sewage
2. Organic nitrogen and nitrate in sewage
3. Organic nitrogen and ammonia in sewage
4. Ammonia and nitrate in sewage Problem Based MCQs

Correct Option: C

T.KN = Ammonia (60%) + Organic Nitrogen (40%)