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Advanced Wastewater Treatment

Course: Waste Water Engineering — Practice MCQs, solutions, formulas & past entrance questions.

Courses › Waste Water Engineering › Advanced Wastewater Treatment

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advanced-wastewater-treatment (Click to view content)

1. What is EE/O for TCA in kWh/1000 US gal/order?

15 20 10 30

15

The EE/O for TCA in kWh/1000 US gal/order is 15. This is also called tricarboxylic acid. This requires a reduction catalyst prior to UV dosage.

Hint Answer

2. In nitrification, ammonia is converted to _____

Nitrogen Nitrate Nitrite Amide

Nitrate

The first step is nitrification, which is conversion of ammonia to nitrate through action of nitrifying bacteria. The second step is nitrate conversion (denitrification), which is carried out by facultative heterotrophic bacteria under anoxic conditions.

Hint Answer

3. _______ stores natural gas.

Sponge Activated carbon Cotton Zinc

Activated carbon

Activated carbon?s ability is more in storing natural gas and hydrogen gas. The porous material acts as a sponge for different types of gases.

Hint Answer

4. Which of following below represents nitrate ion?

NO₂ NO₃^– NO^– NO₂^–

NO₃^–

Organic nitrogen is represented by N, ammonia is represented by NH₃, nitrate ion is represented by NO₃^– and nitrite ion is represented by NO₂^–. The oxidation state of nitrate ion is +5.

Hint Answer

5. What is process for converting organic-nitrogen to ammonia?

Hydrolysis Nitrification Denitrification Oxidation

Hydrolysis

Maximum percentage of nitrogen in sewage is converted from nitrogen to ammonia through a process called hydrolysis.

Hint Answer

6. What is highest enthalpy of adsorption for chemical adsorption?

100 KJ mol^-1 200 KJ mol^-1 300 KJ mol^-1 400 KJ mol^-1

400 KJ mol^-1

The enthalpy of chemisorption is as high as that of chemical bonds (bond enthalpies) and is in range of 40 ? 400 kJ mol^-1. Like most of chemical changes, it is irreversible.

Hint Answer

7. What is permitted concentration of iron in drinking water?

100 g/l 200 g/l 300 g/l 400 g/l

200 g/l

The permitted concentration of iron in drinking water is 200g/l. The permitted concentration of manganese in drinking water is 50g/l. The permitted concentration of arsenic in drinking water is 10g/l.

Hint Answer

8. What is SDNR assumed while designing postanoxic tank?

0.1-0.4 1.5-2 0.8-1 3-4

0.1-0.4

The SDNR assumed while designing postanoxic tank is 0.1-0.4. Denitrifying bacteria exist in order to remove nitrogen biologically. The value for SDNR is different for a preanoxic tank.

Hint Answer

9. What is maximum mesh size being used?

20 40 45 55

40

When using mesh sizes, 40 is coarsest and 600 is finest or highest level of filtration. The filtration quality is given as equivalent mesh size of a comparable screen filter.

Hint Answer

10. What is oxidative potential of hydroxyl radical?

2.08 2.18 2.28 1.78

2.28

The oxidative potential of hydroxyl radical is 2.28 V, oxidation potential of ozone is 2.07 V and oxidation potential of hydrogen peroxide is 1.78 V.

Hint Answer

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All Chapters

View all Chapter and number of question available From each chapter from Waste-Water-Engineering

Wastewater Flow Rates, Collection and Conveyance of Sewage

Wastewater Flow Rates, Collection and Conveyance of Sewage

Hydraulic Design & Construction of Sewers

Hydraulic Design & Construction of Sewers

Sewer Appurtenances & Sewage Pumping

Sewer Appurtenances & Sewage Pumping

Valves, Blowers & Wastewater Characteristics

Valves, Blowers & Wastewater Characteristics

Natural Methods of Wastewater Disposal, Chemical Reaction Engineering and Waste Water Treatment

Natural Methods of Wastewater Disposal, Chemical Reaction Engineering and Waste Water Treatment

Unit Operations for Wastewater Treatment

Unit Operations for Wastewater Treatment

Preliminary Treatment

Preliminary Treatment

Types of Settling Tank

Types of Settling Tank

Sewage Filtration

Sewage Filtration

Activated Sludge Process

Activated Sludge Process

BOD Removal Methods & Miscellaneous Methods

BOD Removal Methods & Miscellaneous Methods

Treatment and Disposal of Sludge

Treatment and Disposal of Sludge

Septic Tanks, Oil and Grease Removal

Septic Tanks, Oil and Grease Removal

Advanced Wastewater Treatment

Advanced Wastewater Treatment

House Drainage

Rural Sanitation

Rural Sanitation

Corrosion control & Instrumentation

Corrosion control & Instrumentation

Topics

This Chapter advanced-wastewater-treatment consists of the following topics

Advanced Wastewater Treatment

What is EE/O for TCA in kWh/1000 US gal/order?

In nitrification, ammonia is converted to _____

_______ stores natural gas.

Which of following below represents nitrate ion?

What is process for converting organic-nitrogen to ammonia?

What is highest enthalpy of adsorption for chemical adsorption?

What is permitted concentration of iron in drinking water?

What is SDNR assumed while designing postanoxic tank?

What is maximum mesh size being used?

What is oxidative potential of hydroxyl radical?

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