Click the correct answer (True or False).
Click the correct answer.
Which of the following is produced during wastewater treatment?
Sludge
Biogas
Both Sludge and Biogas
None of these
Which of the following is not a low cost onsite sewage disposal system?
Septic tanks
Chemical toilets
Wastewater treatment plant
Composting pits
Sewage treatment processes involve which of the following?
Removal of solid material
Sedimentation
Aeration of clarified water
All of these
Which of the following are low cost onsite sewage disposal systems?
Composting pits
All of these
Chemical toilets
Septic tanks
Which of these statements are not correct about ozone?
Its proportion in air is about 3%.
All of these.
It is used to disinfect water.
It absorbs ultraviolet rays.
Click the correct answer.
Cleaning of water is a process of removing
.
contaminants
oxygen
solid wastes
soil
Wastewater released by houses is called
.
sewage
drainage
dirty water
pollutants
Drains get blocked by
.
oil
fats
oil and fats
grease
Increased growth of algae occurs due to the presence of
.
nitrates
sulphates
phosphates
carbonates
