Liquid Wastes

Earth Science Quarter 2

In a filtration plant water is filtered using layers of
a. sand and clay
b. clay and fine gravel
c. sand and fine gravel
d. sand, fine gravel and medium gravel

d. sand, fine gravel and medium gravel

The remaining sewage after it has passed through the sludge tank is known as
a. Clinker
b. Distillate
c. Effluent
d. Treated sewage

b. Distillate

Which of the following is/are products of wastewater treatment?
a. Aerator
b. Biogas
c. Sludge
d. Both biogas and sludge

d. Both biogas and sludge

The system of a network of pipes used for taking away wastewater from homes or public buildings to the treatment plant is known as?
a. Sewerage
b. Sewers
c. Transport system
d. Treatment plant

b. Sewers

Which of the following is a part of inorganic impurities of the sewage? a. Pesticides
b. Phosphates
c. Urea
d. Vegetable waste

c. Urea

Wastewater containing both liquid and solid excreta.

Sewage

Underground conduits that carry sewage and drainage water.

Sewers

The system of sewers used for transporting sewage.

Sewerage

Ways to Minimize Waste at Home:

• Use water-efficient appliances.

• Recycle greywater for gardening.

• Avoid using chemical-based cleaners.

Column A	Column B
1. Inorganic impurities
2. Organic impurities
3. Nutrients
4. Bacteria
5. Sewage

Column A	Column B
1. Inorganic impurities	d. Pesticides and herbicides
2. Organic impurities	e. Wastewater
3. Nutrients	a. Phosphorus and nitrogen
4. Bacteria	c. Cholera and typhoid
5. Sewage	b. Nitrates and phosphates

Which of the following is not a source of waste water?
a. Homes
b. Hospitals
c. Industries
d. Sewers

d. Sewers

In country area, untreated sewage is pumped into tanks known as
a. Grit tanks
b. Septic tanks
c. Sewage tanks
d. Sludge tanks

b. Septic tanks

This waste is also known as domestic wastewaters a. Commercial areas
b. Industrial areas
c. Municipal areas
d. Residential areas

d. Residential areas

A process used to remove contaminants from wastewater or sewage and convert it into an effluent that can be returned to the water cycle with minimum impact on the environment, or directly reused.
a. Sewage treatment
b. Wastewater treatment
c. Liquid waste treatment
d. Primary sewage treatment

b. Wastewater treatment

It comes from sinks, baths, washing machines, and other kitchen appliances apart from toilets. This also may result from washing food, clothing, dishes, as well as from showering or bathing.
a. Blackwater
b. Green water
c. Greywater
d. Yellow water

c. Greywater

Is used water is wastewater?

yes, used water is wastewater

Could Wastewater be reused

yes, wastewater can be treated and reused

Industries have the highest percentage of waste

yes, industries are known to have the highest percentage of waste

Sewage is a solid waste which causes water pollution and soil pollution.

no, it is a liquid waste

Under the Protection of the Environment Operations Act 1987, businesses that generate liquid waste are required to manage it in a way that protects the environment and the community

wrong it is 1997