Wastewater Flashcards
1
Q
What is sewage?
A
Liquid containing contaminants.
2
Q
What is sewerage?
A
Whole system of sewers.
3
Q
What is sewer?
A
Pipeline which conveys sewage. Usually unpumped.
4
Q
What is a pressure main?
A
Pipeline that is pumped.
5
Q
What is CGS?
A
Conventional Gravity Sewerage.
6
Q
What is CED?
A
Common effluent disposal.
7
Q
What is VGS?
A
Variable grade sewers.
8
Q
What are the advantages of CGS?
A
- low maintain/op
- all sewage removed
9
Q
What are this disadvantages of CGS?
A
- Higher capital cost
- greater disruption during construction
10
Q
What are the advantages of CED?
A
- smaller pipes, flatter grades
- reduced organic load at WWTP
- reduced peaking loads
11
Q
Disadvantages of CED?
A
Septic tanks must be maintained.
Needs storage facility.
12
Q
Advantages of VGS?
A
Same as CED.
13
Q
Disadvantages of VGS?
A
Higher maintenance.
Pump and check valves required at low properties.
Same as CED.
14
Q
What is the STEP?
A
Septic Tank Effluent Pumping.
15
Q
What is GP?
A
Grinder Pumps
