WorksheetsCPE649: WASTEWATER TREATMENT, SLUDGE DISPOSAL, WASTEWATER REUSE
Total questions: 17
Worksheet time: 17mins
Describe the biological treatment methods used in waste water treatment.
use of chemical agents to remove impurities from the water
use of physical filtration to separate solids from the water
heat evaporates water and leave behind impurities
microorganisms break down organic matter in the water.
What is sludge management in waste water treatment?
Collection, treatment, and disposal of solid residue
Disposal of liquid waste
Purification of drinking water
Treatment of air pollution
Discuss the role of microorganisms in secondary treatment process.
Microorganisms break down organic matter and reduce pollutants in the wastewater.
Microorganisms only break down inorganic matter in the wastewater.
Microorganisms have no role in the secondary treatment process.
Microorganisms increase the level of pollutants in the wastewater.
How does the use of coagulants and flocculants contribute to chemical treatment methods in waste water treatment?
They contribute to the growth of bacteria in the wastewater
They have no impact on the treatment of wastewater
They help to increase the acidity of the wastewater
They help to clump together particles in the wastewater, making it easier to remove them through filtration or sedimentation.
__________ are fixed-film reactors in that organisms are attached to support media. The support media are slowly rotating discs that are partially submerged in flowing wastewater in the reactor.
Activated sludge
Biofilter/Trickling Filter
Clarifier
Rotating Biological Contactors
A ___________ consists of a basin or tower filled with support media such as stones, plastic shapes, or wooden slats.
Activated sludge
Biofilter/Trickling Filter
Clarifier
Rotating Biological Contactors
Effluent from _________ treatment is of a high standard and suitable for reuse.
Preliminary
Primary
Secondary
Tertiary
Choose the method that belong to aerobic process
Digestion
Sludge blankets
Comminutors
Trickling filters
The adsorption, membrane and ion exchange technology commonly applied in what stage of wastewater treatement?
Preliminary treatment
Primary treatment
Secondary treatment
Tertiary or advance treatment
What is the main difference between the role of primary and secondary clarifiers in wastewater treatment?
Primary clarifiers remove biological contaminants, while secondary clarifiers remove physical impurities.
Primary clarifiers remove settleable solids, while secondary clarifiers separate biological floc from treated water.
Primary clarifiers remove dissolved pollutants, while secondary clarifiers remove suspended solids.
There is no significant difference in the roles of primary and secondary clarifiers.
What is the process called where microorganisms break down organic matter in the absence of oxygen?
Aerobic digestion
Anaerobic digestion
Composting
Oxidation
In wastewater treatment, activated sludge is mainly used for:
Removing heavy metals
Breaking down organic matter aerobically
Filtering large debris
Disinfecting water
Which of the following is not a step in the biological treatment of wastewater?
Sedimentation
Chlorination
Aeration
Sludge digestion
Trickling filters used in wastewater treatment are designed to:
Remove toxic chemicals
Facilitate aerobic decomposition of organic matter
Filter out solid waste
Reduce water turbidity
Which of the following is NOT methods of sludge disposal?
Composting
Landfilling
Incineration
Open dumping
Which of the following is NOT the method to reuse wastewater?
Irrigation of agricultural fields, golf courses, parks, and other green spaces
Toilet flushing
Reuse in factory (boiler, cooling water, washing equipment)
Drinking water
