Chemistry 16.9 Flashcards
What is the primary purpose of wastewater treatment?
To remove contaminants and make water safe for discharge or reuse.
True or False: Wastewater treatment only involves physical processes.
False
What are the three main stages of wastewater treatment?
Primary, secondary, and tertiary treatment.
Fill in the blank: Primary treatment primarily involves __________.
physical processes to remove solids.
What is the role of bacteria in secondary wastewater treatment?
To break down organic matter.
Multiple choice: Which of the following is NOT a method of tertiary treatment? A) Filtration B) Disinfection C) Sedimentation D) Nutrient removal
C) Sedimentation
What is the purpose of disinfection in wastewater treatment?
To kill pathogens and make the water safe for discharge.
True or False: Anaerobic digestion is a process used in secondary treatment.
True
What is sludge in the context of wastewater treatment?
The solid waste that settles during the treatment process.
What can tertiary treatment include to remove nutrients.
chemical processes
What is the main disadvantage of using chlorine for disinfection?
It can form harmful by-products.
Multiple choice: Which of the following is a common method for secondary treatment? A) Activated sludge B) Reverse osmosis C) Filtration D) Coagulation
A) Activated sludge
What is the term for the process of separating solids from liquids in wastewater treatment?
Sedimentation
True or False: Wastewater can be treated and reused for irrigation.
True
What is a common indicator of water quality in treated wastewater?
Biochemical oxygen demand (BOD)
What is often used to remove suspended solids in primary treatment.
Screening
What is the purpose of aeration in wastewater treatment?
To introduce oxygen for bacteria to break down organic matter.
Which processes are used to stabilize sludge?
Incineration, Composting, Anaerobic digestion
What is the environmental impact of untreated wastewater?
It can contaminate water bodies and harm aquatic life.
True or False: Wastewater treatment is only important in urban areas.
False
What is the significance of nutrient removal in wastewater treatment?
To prevent eutrophication in receiving water bodies.
What is a process that uses microorganisms to break down organic material in wastewater.
Biological treatment
What is the term for the final step in wastewater treatment that ensures water meets quality standards?
Polishing
Multiple choice: Which of the following is a benefit of wastewater treatment? A) Reduces pollution B) Conserves water C) Protects public health D) All of the above
D) All of the above
What is the role of a clarifier in wastewater treatment?
To allow solids to settle and separate from the liquid.
True or False: Wastewater treatment processes are the same worldwide.
False
