Which approach most effectively reduces both nitrogen and phosphorus concentrations during wastewater treatment?
Biological and chemical nutrient removal
Nitrogen and phosphorus are the two main nutrients that cause eutrophication, and removing both efficiently needs a combined strategy.
Biological nutrient removal uses microbes for nitrification–denitrification (nitrogen) and enhanced biological phosphorus uptake, while chemical dosing (for example alum or ferric salts) precipitates the remaining phosphorus. Together this biological and chemical nutrient removal targets both nutrients at once.
UV disinfection only kills pathogens, and simple sedimentation or aeration alone does not reliably strip both nutrients, so the combined biological–chemical route is the most effective.
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Important Questions from Environment Education
Also refers to global warming
EVS is an integration of
Select an incorrect statement:
Persistence of vision in a human eye is
Given below are two Statements
Statement (I): Non formal education processes and programmes should, in the long run, lead to creating awareness, in individual and society of prevailing environmental solutions.
Statement (II): Non formal education is intended for all age groups and sections of society
In the light of the above statements check the most appropriate answer.
