Chapter 3, Physical Unit Operation

Screening process is to remove solid objects such as

• Plastics

• Microorganism

• sludge

• Sand

The process of adding air into wastewater to allow aerobic bio-degradation of pollutant components is called

• Flotation process

• Aeration process

• High rate clarification process

• Sedimentation process

Screens are generally classified into three based on the size of their openings in the screening elements and mechanism of removal. Below is the types of screen EXCEPT

• Microscreens

• Coarse screen

• Fine screen

• Protector screen

During primary sedimentation process, what type of waste will be removed?

• Viruses

• Organic Phosphorus

• Colloidal and dissolved constituent

• Plastics

What is the waste water treatment process which remove waste by dissolving air in the wastewater under pressure and the releasing the air at atmospheric pressure in tank basin with small air bubbles?

• Aeration Process

• Screening Process

• Sedimentation process

• Flotation process

The picture refer to..

• Aeration Process

• Flotation Process

• Clarification process

• Grit removal process

Any floating and settleable solid can be grinder by reduction size using Grinders and___________

What is the process that remove all kind of suspended solid, oil, natural organic matter and color from the water to make it clear?

• Gravity separation process

• Grit removal process

• High-rate clarification process

• Primary sedimentation process

Preliminary treatment of wastewater objective is the removal coarse solids and other large material. The process such as...

• Grit removal process

• Sedimentation process

• Flotation process

• Precipitation process

Grit removal is the process used to remove sand, silt and grit from water. This process use ________ to separate the solids from wastewater

• Air bubbles

• Filtration

• Gravity and velocity

• Screening