3.1 Screening

What is the main goal of screening in wastewater treatment?

• Removing dissolved substances

• Eliminating microorganisms

• Protecting downstream equipment and processes

• Reducing water temperature

What distinguishes a fine screen from a coarse screen?

• Fine screens have smaller openings than coarse screens

• Coarse screens have mechanical cleaning mechanisms

• Fine screens are used for larger particles than coarse screens

• Coarse screens are used for biological treatment

Which of the following solids can be effectively screened in wastewater treatment?

• Dissolved salts

• Large plastic bags

• Sand particles

• Gaseous pollutants

Which type of solids often causes clogging in screens and requires special attention?

• Biological solids

• Inorganic solids

• Fibrous solids

• Dissolved solids

How is the volume of screening typically measured?

• Cubic meters per hour

• Grams per liter

• Cubic meters per kilogram

• Cubic meters per ton

In the context of screening, what does the term "disposal site lifespan" refer to?

• The time it takes for the disposal site to reach maximum capacity

• The time it takes for the disposal site to be constructed

• The time it takes for the screening process to occur

• The time it takes for the disposal site to decompose naturally

Which factor is NOT typically considered when estimating the lifespan of a disposal site?

• Rate of screening accumulation

• Size of the screening material

• Disposal site capacity

• Distance from the screening unit

How does the rate of screening accumulation affect the estimation of disposal site lifespan?

• Higher accumulation rate shortens the lifespan

• Higher accumulation rate prolongs the lifespan

• Accumulation rate does not impact the lifespan

• Accumulation rate only affects disposal site construction

What factors determine how long a disposal site will last before it is full?

• Only the size of the disposal site

• Rate of screening accumulation and size of the disposal site

• Type of screening material

• Distance from the wastewater source

What is the principle behind solids reduction in screening processes?

• Increasing the size of particles

• Decreasing the size of particles

• Converting solids into gases

• Removing all solids from the wastewater