Save
Chemistry
Waste Water
Save
Share
Learn
Content
Leaderboard
Share
Learn
Created by
grace
Visit profile
Cards (23)
What is the main topic of today's video?
Wastewater treatment
View source
What are the two main purposes of treating wastewater?
Reuse
it or safely return to
nature
View source
What are the three main sources of wastewater?
Domestic
,
agricultural
, and industrial
View source
What does domestic waste refer to?
Household waste like water from
showers
View source
Where does domestic wastewater go after being flushed?
Into the
sewers
and
sewage treatment plants
View source
What type of wastewater is produced by agriculture?
Nutrient runoff
and
animal waste
View source
What do industrial sources of wastewater include?
Factories
that make and use
chemicals
View source
Why must all wastewater be treated?
To make it
safe
for disposal
View source
What is generally required for treating domestic and agricultural sewage?
Removing
organic matter
and
harmful microbes
View source
What additional steps are needed for industrial wastewater treatment?
Extra steps to remove
harmful chemicals
View source
What is the first step in sewage treatment?
Screening
to remove large objects
View source
What happens during sedimentation in sewage treatment?
Heavier solids sink to form
sludge
View source
What is the effluent in sewage treatment?
The lighter part after
sedimentation
View source
What conditions are maintained in the effluent tank?
Aerobic conditions
with
oxygen supply
View source
What conditions are maintained in the sludge tank?
Anaerobic
conditions with little
oxygen
View source
How is organic matter broken down in the effluent tank?
By
aerobic digestion
using
microorganisms
View source
How is organic matter broken down in the sludge tank?
By
anaerobic digestion
using
microorganisms
View source
What is produced during anaerobic digestion of sludge?
Methane
, which can be captured
View source
What can the remaining digested waste from sludge be used for?
As fertilizer rich in
nutrients
View source
What additional stages may be needed for toxic substances in wastewater?
Adding chemicals or using
ultraviolet
radiation
View source
Why is treating wastewater considered easier than desalinating salt water?
It requires less
effort
and resources
View source
Why do some countries rely on treating wastewater for drinking supplies?
Due to
limited water supply
View source
What should viewers do if they enjoyed the video?
Like and subscribe
View source