CHAPTER NO-18 WASTER WATER STORY

ONE WORD-

Q- Saline water in sea is called?
A-Marine water

Q- Clean water fit for drinking is called?
A-Potable water

Q- Dirty water containing garbage and human wastes is called?
A-Sewage

Q-fuel obtained from decomposing sludge is called?
A-Biogas

Q- Sewerage  system leads from house, hospitals and industries is send to?

A- Sewage treatment plant.

Q- What is use of dried sludge?
A- Manure

Q-What is removed by sand filter?
A- Small impurities.

Q-Name the by-products of waster water treatment?

A-Sludge and biogas

Q-Examples of onsite sewage disposal system?

A-Septic tanks, chemical toilets, composting pits.

Q-Name some waterborne diseases?

A-Cholera,typhoid, polio, meningitis, hepatitis and dysentery.

Q-Which trees are advised to be grown along sewage ponds and why?

A-Eucalyptus trees because these trees absorb super plus waste water rapidly and release pure water vapor into the atmosphere.

Short notes-

Contaminants-

Sewage water has  some dissolved and suspended impurities, these impurities are called contaminants.

Sewage-

Waste water containing garbage, human waste and washings is called sewage

Biogas-

Fuel gas coming from decaying decomposed biodegradable matter is called biogas.

Sewerage system-

A network of underground drains which carry waste water along with waste matter is called sewerage system.

Contamination-

Adding pollution and getting polluted with harmful components is called contamination.

Sludge-

Solid waste that settle down as sediment.

Q-What are the possible constituents of sewage?

A-

• Waste food
•  Human and animal faeces
•     Washings like soap and detergents.
•     Washed off rags and rubbish
•     Dust,sand  and grit
•     Microbes like bacteria and fungi

Q-Examples of onsite sewage disposal system?

A-Septic tanks, chemical toilets, composting pits.

Q-Name some waterborne diseases?

A-Cholera,typhoid, polio, meningitis, hepatitis and dysentery.

Q-Which trees are advised to be grown along sewage ponds and why?

A-Eucalyptus trees because these trees absorb super plus waste water rapidly and release pure water vapor into the atmosphere.