Biotechnology of Sewage Treatment

What is the first step in the water treatment process?

• coagulation
• filtration
• flocs
• concentation

 Pick up the incorrect statement from the following:

• Manholes are provided in sewer pipes at suitable intervals

• Catch basins are generally provided in sewers for carrying drainage discharge

• Inlets are generally provided in all sewers

• None of these

The following are the PHYSICAL CHARACTERISTICS of wastewater, EXCEPT

• Turbidity

• Total Dissolved Solids

• Color

• Alkalinity

Identify the two structures:

• Biotower, Captor Container

• Rotating biological contactor, biotower

• Captor Container, rotating biological contactor

• Deep-shaft Turbines, Biotower

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

In waste-water treatment, generally the Flotation method is used for the separation of solid particles that are:

• heavier than water

• only green in color

• only black in color

• lighter than water

Sawdust is not soluble in water. If, accidentally some particles of sawdust drop into a glass of water. How would you separate them from water?

• Decanting

• Filtering

• Sieving

• Distillation

The natural process in which the oxygen of water of streams is consumed by the sewage and at the same time, it is replenished (filled again) by the atmosphere, is known as:

• Oxidation

• De-oxidation

• Self-purification

• Sedimentation

Which of these is NOT a part of Tertiary Treatment?

• Removal of Phosphates and Nitrates

• Anaerobic Treatment

• Disinfection with Chlorine

• Using Maturation Ponds

The activated sludge process is an:

• Aerobic attached growth system

• Anaerobic attached growth system

• Anaerobic suspended growth system

• Aerobic suspended system

Tags

NGSS.HS-LS2-3

 A well oxidized sewage contains nitrogen mainly as:

• Nitrates

• Nitrites

• Free ammonia

• None of these

Tags

NGSS.MS-LS2-3