Limitations
- vacuum systems are not capable of transporting sewage over very long distances, but can pump long distances from the vacuum station to the next STP or main gravity sewer.
- vacuum sewerage systems are only capable for the collection of wastewater within a separated system (not for the collection of storm-water)
- the lines can only reach up to 3–4 km laid in flat area (restrictions of the system due to headlosses (3-4.5 m) (friction and static))
- systems should be designed with help of an experienced manufacturer (concepts are usually free of charge)
- external energy is required at the central vacuum station. However, the collection pits do not require electrical energy.
- odours close to the vacuum station can occur, a biofilter may be necessary
- integrity of the pipe joints is paramount
- grease can clog the sensor tube (if set up incorrectly) thus requiring preventative maintenance cleaning
- mechanical controllers (float switches) require preventative maintenance for worn parts and seals
- vacuum valves can get stuck open leading to pressure drops in the entire system. However, a monitoring system can help identifying stuck open valves immediately
Read more about this topic: Vacuum Sewer
Famous quotes containing the word limitations:
“That all may be so, but when I begin to exercise that power I am not conscious of the power, but only of the limitations imposed on me.”
—William Howard Taft (1857–1930)
“The motion picture made in Hollywood, if it is to create art at all, must do so within such strangling limitations of subject and treatment that it is a blind wonder it ever achieves any distinction beyond the purely mechanical slickness of a glass and chromium bathroom.”
—Raymond Chandler (1888–1959)
“The only rules comedy can tolerate are those of taste, and the only limitations those of libel.”
—James Thurber (1894–1961)