Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

REHS > Wastewater 2017 > Flashcards

Wastewater 2017 Flashcards

1
Q

How quickly does wastewater travel from home to sewer plant?

A

At least 2ft/sec
At most, 2 days to reach plant

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

How far apart are manholes?

A

300-500ft

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

When is the heaviest flow of sewage through a wastewater treatment plant?

A

Between 3-9 pm

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

Define domestic waste water

A

sanitary waste out of home, general business, and institution from toilet, showers, sick, etc

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

Define industrial waste water

A

waste water discharged from manufacturing plant, restaurants, hospitals, meat processors, refineries, etc

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

How does ground water affect waste water?

A

can infiltrate sewer system by cracks in sewer pipe

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

How does storm drain runoff affect waste water?

A

certain amount of water infiltration from leaky pipes
high water table can be introduced into system by open drain

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

What is the National Pollution Discharge Elimination System?

A

SPDES
prohibits draining of any type of wastewater onto public streets

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

What is leachate?

A

liquid waste coming out of the ground at refuse landfills
can be from rainfall seeping into landfill or liquid waste intentionally dumped

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the physical characteristics of waste water?

A

fresh - 99.8% water
0.2% solid concentration
aka Gray Water

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

What are the three temperature types of bacteria involved in waste water?

A

Thermophillic zone - 113-158F
Mesophillic zone - 59-112F
Psychrophillic zone - 35-50F

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

What is surface disposal?

A

surface disposal pipes drain liquid onto land

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

What is tile fields disposal?

A

shallow underground collection of pipes, tiles segmented loosely to allow water to percolate

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

What is subsurface disposal?

A

leach lines laid 2-5’ undergrounds with perforated pipes 4” thick

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

What is dilution disposal?

A

no longer accepted
dispose of waste water into large water body, river, stream, etc

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

What is effluent?

A

Waste water being treated, going out of a waste water system and into a treatment plant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is absorption?

A

something that is taken into material

18
Q

What is adsorption

A

something that adheres to material

19
Q

What is the standard weight of one gallon of water?

A

8.34 lbs

20
Q

One cubic feet of water is how many gallons?

A

7.48

21
Q

What is preliminary treatment of waste water?

A

bar screening - removed large objects
grit removal - sand/gravel
pre-aeration - introduces oxygen, helps remove oil/scum
flow meter - measures rate of flow
chlorine - optional

22
Q

What is primary treatment of waste water?

A

sedimentation - clarification tanks, removes solids that can settle and floating debris

23
Q

What is secondary treatment of waste water?

A

collects raw sludge and relocates for sludge digestion
bio/chem/physical treatment - further removal of solids and dissolved solids of the waste water

24
Q

What is tertiary treatment of waste water?

A

filtration - filters to remove particles, color, odor
disinfection - destroys pathogenic bacteria
used mainly for reclaimed water

25
Q

What is the aerobic treatment process?

A

activated sludge, trickling filter, oxidation ponds, composting, subsurface disposal field

26
Q

What are examples of anaerobic treatment process?

A

sludge digestion, methane production, septic tanks, composting

27
Q

What are examples of the anaerobic treatment process?

A

sludge digestion, methane production, septic tanks, composting

28
Q

What is a stabilization pont?

A

Lagoonization
holds volume of water for period of time at shallow depths (3-5’) to promote aerobic activity and purify water
remains for 45-60 days before use

29
Q

Define sludge in general

A

solid portion of waste water

30
Q

Define raw sludge

A

most biologically active, high potential to turn septic

31
Q

Define activated sludge

A

contains biological agents that gidest sludge into inorganic materials, aka “Mixed Liquor”

32
Q

Define digested sludge

A

product of total anaerobic digestion
most stable

33
Q

What is a pit privy?

A

simple hole dug
only used in the past, now only used in emergencies

34
Q

What is a cesspool?

A

wastewater designed to seep into ground from cesspool vault

35
Q

What is a septic tank

A

used when there is an inability to connect to sewer
waste water retained in multi-compartment tank for ~24hrs where 60-70% of sludge settles

36
Q

What does a purple pipe indicate?

A

reclaimed water

37
Q

What does a yellow pipe indicate?

A

steam, gas, oil

38
Q

What does a green pipe indicate?

A

sewer

39
Q

What does a blue pipe indicate?

A

potable water

40
Q

What does a red pipe indicate?

A

electrical

41
Q

What does a while pipe indicate?

A

leach line

REHS (47 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions