Environmental Engineering in CE
Smoke is produced due to

Insufficient supply of combustion air and insufficient time for combustion
All of these
Poor quality of fuel and improper mixing of fuel & combustion air
Poor design & overloading of furnace

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Environmental Engineering in CE
Aerobic biological oxidation ponds used for the purification of polluted water

Destroys/removes pathogen from the sewage
Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents
Destroys/removes pathogen much more effectively if the sewage is chlorinated
All of these

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