Chemical Characteristics of Water Flashcards

1
Q

What is NOM removal in water done through?

A
  • Coagulation
  • Filtration
  • Dissolved Air Floatation
  • Adsorption, Oxidation, Ion Exchange
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the three types of organic compounds found in wastewater?

A
  • Carbohydrates
  • Proteins
  • Fats
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How is biodegradation of organic waste achieved?

A

Using bacteria and other biological organisms capable of metabolizing the organic compound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Biodegradation in the presence of oxygen is known as?

A

Aerobic process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Biodegradation in the absence of oxygen is known as?

A

Anaerobic process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Why is organic matter in wastewater effluent regulated?

A

If organic matter is too high, microorganisms in the receiving waters will consume the organic material, utilizing dissolved oxygen, which depletes the available dissolved oxygen for aquatic life

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is BOD?

A

It is a measure of how much organic material is in the wastewater plant effluent calculated by the amount of oxygen used by microorganisms in the oxidation of organic matter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

If more organic matter is stabilized more oxygen is utilized, true or false?

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does the rate constant K depend on?

A
  • Nature of the waste
  • Type of organism present
  • Temperature
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the typical K value for domestic wastewater?

A

0.2/day to 0.3/day

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

BOD increases with higher temperature, true or false?

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the typical values for theta?

A

1.135 (4 to 20 deg C)
1.056 (20 to 30 deg C)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Nitrification increases BOD in a wastewater sample, true or false?

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the standard temperature used for laboratory tests?

A

20 deg C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is Chemical Oxygen Demand (COD)?

A

It measures the oxygen equivalent of the organic matter in the presence of acid (chemical) and heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the advantage of the COD test?

A

It takes 3 hours whereas BOD test takes 5 days

17
Q

What are the disadvantages of the COD test?

A
  • toxic
  • does not provide information about the rate of oxidation of organic matter
18
Q

A TOC test is used when large amounts of organics are present in wastewater, true or false?

A

False, only for small amounts