WorksheetsSecondary treatment
Total questions: 10
Worksheet time: 5mins
What is the primary purpose of secondary treatment in wastewater management?
Removal of large solids
Reduction of organic content and suspended solids
Neutralization of acidic wastewater
Removal of heavy metals
Which of the following processes is commonly used in secondary treatment?
Chlorination
Filtration
Biological digestion
Chemical precipitation
In activated sludge systems, what is the purpose of the aeration tank?
To remove large debris
To allow biological organisms to degrade organic matter
To filter solids
To separate sludge from water
What is the main difference between a trickling filter and an activated sludge process?
One is a physical treatment; the other is biological
Trickling filters use a fixed medium; activated sludge uses organics matter
Activated sludge is faster than trickling filters
Which type of microorganisms are primarily used in the biological treatment of wastewater?
Algae
Bacteria
Protozoa
Fungi
In which secondary treatment process are microbes attached to a media where wastewater flows over the media?
Activated sludge
Trickling filter
Anaerobic digestion
Membrane filtration
What is the process called where microorganisms break down organic matter in the absence of oxygen?
Composting
Aerobic digestion
Oxidation
Anaerobic digestion
In wastewater treatment, activated sludge is mainly used for:
Removing heavy metals
Disinfecting water
Filtering large debris
Breaking down organic matter aerobically
Which of the following is not a step in the biological treatment of wastewater?
Sedimentation
Aeration
Sludge digestion
Chlorination
Which of the following indicates good performance of an activated sludge process?
Clear and non-turbid effluent
A high sludge age
Minimal foaming in the aeration tank
Dark brown sludge color
