17 Questions
What is the main purpose of the aeration tank in a wastewater treatment plant?
To oxidize sewage organic matter into CO2 and water
Which treatment process is responsible for transferring flocs to a settling tank for removal of organic matter?
Primary treatment
What type of microorganisms are present in trickling filters or biofilters?
Aerobic microbes
Which treatment process is specifically designed to remove essentially all the BOD, nitrogen, and phosphorus from wastewater?
Tertiary treatment
What is the main byproduct generated by anaerobic sludge digesters in wastewater treatment?
Methane and CO2
Which treatment method involves cleaner water trickling through pipes at the bottom of the filter for additional treatment?
Trickling filters
What is the primary purpose of primary treatment in wastewater treatment?
To separate solid and particulate materials from wastewater using physical methods
Which stage of treatment is designed to remove most of the organic matter and reduce the BOD by up to 95%?
Secondary treatment
What is the main function of activated sludge systems in wastewater treatment?
To promote the biodegradation of organic impurities
How does trickling filters differ from activated sludge systems in secondary treatment?
Trickling filters use physical separation methods while activated sludge uses biological processes
In which stage of wastewater treatment are aeration and settling tanks typically utilized?
Secondary treatment
What is the major difference between primary and secondary treatments in wastewater treatment?
Primary treatment focuses on reducing pathogens while secondary treatment focuses on reducing BOD
What is the primary objective of wastewater treatment?
To reduce or eliminate contaminants to acceptable levels
Which of the following is NOT considered a main source of water pollution according to the text?
Oil spills
How is the total organic carbon (TOC) different from biologically usable carbon measured by the BOD test?
TOC specifies all carbon regardless of usability
Which parameter is used to measure the amount of oxygen required by aerobic bacteria for biodegradation over a five-day period at 20°C?
Biochemical oxygen demand (BOD)
Which wastewater treatment process involves the use of microorganisms in an aerated tank to break down organic matter?
Activated sludge system
Test your knowledge on wastewater treatment processes including aeration tanks, settling tanks, and trickling filters. Learn about the role of aerobic microorganisms, flocs formation, and the removal of organic matter in the treatment process.
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