Activated Sludge Treatment System Quiz

What does MCRT refer to in an activated sludge system?

Is activated sludge an anaerobic process?

What is the main purpose of secondary treatment in wastewater treatment?

What does SVI measure in the context of sludge volume?

Which statement about untreated wastewater bacteria is true?

Are ppm and % considered roughly equivalent for wastewater treatment calculations?

In a trickling filter, recirculation helps prevent excessive sloughing. Is this statement:

Is series operation of a trickling filter the preferred mode during very low temperature conditions in winter?

Is the advantage of trickling filter over the activated sludge related to its BOD removal efficiency?

Can hydrogen sulfide gas in a moist atmosphere result in corrosion of concrete structures?

Can the presence of hydrogen sulfide always be detected by its characteristic odor?

Will a well-operated primary clarifier remove between 90 and 95 percent of the influent settleable solids?

Is it common for primary clarifiers to remove 80-85% of the BOD and 90-95% of the TSS?

Are the only function of flights in a rectangular sedimentation tank to push the settled sludge towards the hopper?

Is detention time the time required to fill a tank at a given flow?

Is primary treatment a process that allows substances that will settle or float to be separated from the wastewater being treated?

Does raw sludge pumped from a primary clarifier generally contain about 3% to 6% total solids?

One misconception is that typical domestic wastewater BOD content is about 2000mg/l. Is this statement:

What test is used to determine the organic matter found in the mixed liquor?

The four (4) basic components of every activated sludge treatment system are:

Which of the following statements is not true regarding a wastewater collection system:

Velocity of flow in sewers is usually expressed in terms of:

One of the reasons that air should be excluded from anaerobic digesters is because:

The fundamental purpose of disinfection is to:

The difference between the amount of chlorine added and the amount of chlorine remaining after the contact period is referred to as:

The ultimate measure of the effectiveness of chlorination in disinfection is:

TKN is the measure of:

Sludge with a specific gravity of 1.1 will weigh:

pH increases during the day, and decreases at night in a properly operating facultative pond due to:

What is a common problem associated with trickling filters?

What are the primary organisms responsible for treating wastewater in the trickling filter process?

What does 'sloughing' from a trickling filter refer to?

What is the solids concentration of sludge with a sludge density of 7%?

What is the surface area of a cylindrical tank 80 feet in diameter and 25 feet in height (cylindrical part surface area only)?

Calculate the VS loading to the digester in lbs/day if 10,000 cu. ft of sludge containing 4.8% TS with an average VS content of 82%.

What is the detention time for a sedimentation tank that is 48 feet wide, 210 feet long, and 9 feet deep with a flow of 5 MGD?

What is the weir loading for a sedimentation tank with an outlet weir 480 ft long and a flow of 5 MGD?