Question 1

What is the percentage of aerobically digested sludge?

Accepted Answer

A) 0.2-0.5 
B) 0.3-0.6 
C) 1.0-2.0 
D) 1.5-3.0 
A) 0.2-0.5 
B) 0.3-0.6 
C) 1.0-2.0 
D) 1.5-3.0 C

Question 2

Sludge from the primary clarifier is ______

Accepted Answer

A) Brown and flocculant like appearance 
B) Dark in colour 
C) Gray and slimy 
D) Dark brown in colour 
A) Brown and flocculant like appearance 
B) Dark in colour 
C) Gray and slimy 
D) Dark brown in colour C

Question 3

How does the chemical sludge appear?

Accepted Answer

A) Gray in colour and not slimy 
B) Brown and flocculant like appearance 
C) Red/grayish brown 
D) Black in colour 
A) Gray in colour and not slimy 
B) Brown and flocculant like appearance 
C) Red/grayish brown 
D) Black in colour C

Question 4

What is the % of dry solids assumed for a primary sludge from a settling tank at the outlet?

Accepted Answer

A) 12% 
B) 5-7% 
C) 8% 
D) 9-11% 
A) 12% 
B) 5-7% 
C) 8% 
D) 9-11%

Question 5

Ws = Wsp + Wss What does Wsp stand for in the above equation?

Accepted Answer

A) Total dry solids 
B) Raw primary solids 
C) Suspended solids 
D) none 
A) Total dry solids 
B) Raw primary solids 
C) Suspended solids 
D) none

Question 6

In which year was the term Biosolids introduced?

Accepted Answer

A) 1990 
B) 1995 
C) 1998 
D) 2000 
A) 1990 
B) 1995 
C) 1998 
D) 2000

Question 7

What is the percentage of dry solids assumed for the sludge at the outlet of a centrifuge?

Accepted Answer

A) 10-15% 
B) 1-3% 
C) 4-8% 
D) 9-12% 
A) 10-15% 
B) 1-3% 
C) 4-8% 
D) 9-12%

Question 8

How does the activated sludge appear?

Accepted Answer

A) Gray 
B) Red 
C) Brown and flocculant like appearance 
D) Greasy 
A) Gray 
B) Red 
C) Brown and flocculant like appearance 
D) Greasy

Question 9

From which of the following methods can toxic chemicals be removed?

Accepted Answer

A) Sorption 
B) Adsorption 
C) Absorption 
D) Dewatering 
A) Sorption 
B) Adsorption 
C) Absorption 
D) Dewatering

Question 10

What is the term used for reuse of sewage sludge?

Accepted Answer

A) Compost 
B) Solids 
C) Biosolids 
D) Sludge 
A) Compost 
B) Solids 
C) Biosolids 
D) Sludge

Question 11

What is the amount of solids released into wastewater by human beings?

Accepted Answer

A) 30 gpcd 
B) 40 gpcd 
C) 60 gpcd 
D) 70 gpcd 
A) 30 gpcd 
B) 40 gpcd 
C) 60 gpcd 
D) 70 gpcd

Question 12

What is the first step in the sewage treatment process?

Accepted Answer

A) Dewatering 
B) Thickening 
C) Phosphorus recovery 
D) Digestion? 
A) Dewatering 
B) Thickening 
C) Phosphorus recovery 
D) Digestion?

What is the percentage of aerobically digested sludge?

Sludge from the primary clarifier is ______

How does the chemical sludge appear?

What is the % of dry solids assumed for a primary sludge from a settling tank at the outlet?

Ws = Wsp + Wss What does Wsp stand for in the above equation?

In which year was the term Biosolids introduced?

What is the percentage of dry solids assumed for the sludge at the outlet of a centrifuge?

How does the activated sludge appear?

From which of the following methods can toxic chemicals be removed?

What is the term used for reuse of sewage sludge?

What is the amount of solids released into wastewater by human beings?

What is the first step in the sewage treatment process?

Understanding Water Pollution and Its Effects on Aquatic Life

Water Pollution and Regulations

Pollutants From Wastewater: A Study on River Pollution Control and Wastewater Treatment

Water Treatment and Softening Processes

Water Treatment and Pollution Control

Compounds, Fluoridation, and Oxidation Resistance

Grit Chambers and Activated Sludge Processes

Demineralized Water, Ion-Exchange, and Ozonation Processes

Filters

Exam 9: Sewage Sludge and Treatment Processes

What is the percentage of aerobically digested sludge?

Sludge from the primary clarifier is ______

How does the chemical sludge appear?

What is the % of dry solids assumed for a primary sludge from a settling tank at the outlet?

Ws = Wsp + Wss What does Wsp stand for in the above equation?

In which year was the term Biosolids introduced?

What is the percentage of dry solids assumed for the sludge at the outlet of a centrifuge?

How does the activated sludge appear?

From which of the following methods can toxic chemicals be removed?

What is the term used for reuse of sewage sludge?

What is the amount of solids released into wastewater by human beings?

What is the first step in the sewage treatment process?

Understanding Water Pollution and Its Effects on Aquatic Life

Water Pollution and Regulations

Pollutants From Wastewater: A Study on River Pollution Control and Wastewater Treatment

Water Treatment and Softening Processes

Water Treatment and Pollution Control

Compounds, Fluoridation, and Oxidation Resistance

Grit Chambers and Activated Sludge Processes

Demineralized Water, Ion-Exchange, and Ozonation Processes

Filters