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Questions and Answers
What is the recommended gravel size range for the bed in the wastewater treatment system?
What is the recommended gravel size range for the bed in the wastewater treatment system?
- 3 mm - 32 mm (correct)
- 2 mm - 40 mm
- 5 mm - 35 mm
- 50 mm - 100 mm
What is the recommended depth range for the bed in the wastewater treatment system?
What is the recommended depth range for the bed in the wastewater treatment system?
- 0.45 m - 1 m (correct)
- 0.3 m - 0.8 m
- 0.6 m - 1.2 m
- 0.2 m - 1.5 m
What is the recommended water level range in relation to the top of the medium for the wastewater treatment system?
What is the recommended water level range in relation to the top of the medium for the wastewater treatment system?
- 50 mm above the top of the medium
- On par with the top of the medium
- 75 mm - 150 mm below the top of the medium (correct)
- 200 mm below the top of the medium
What should be provided with the inlet in the wastewater treatment system?
What should be provided with the inlet in the wastewater treatment system?
What is the recommended detention time range for the wastewater treatment system?
What is the recommended detention time range for the wastewater treatment system?
The bottom and sides of the holding pond should be permeable to allow ground-water contamination.
The bottom and sides of the holding pond should be permeable to allow ground-water contamination.
The width-to-length ratio for filter bed should be 1:2 – 1:5.
The width-to-length ratio for filter bed should be 1:2 – 1:5.
The recommended effective diameter for sand as filter medium is at least 0.5 mm.
The recommended effective diameter for sand as filter medium is at least 0.5 mm.
The backwashing provision is not necessary for cleaning the material within the filter effectively.
The backwashing provision is not necessary for cleaning the material within the filter effectively.
The bank of the holding pond should have a steeper slope not exceeding 3:1.
The bank of the holding pond should have a steeper slope not exceeding 3:1.
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