Sewage Treatment System

Finally, in some collection and conveyance systems, especially those with pump stations, the sewage may become septic before it reaches the sewage treatment plant. The septic sewage will release odors at the sewage treatment plant, and will also corrode metal and concrete components of the sewage treatment plant. The best way to avoid septicity in the collection and conveyance system is to design the pump stations so that they deliver the sewage to the sewage treatment plant before the sewage has a chance to become septic.

If the effluent will be disposed to a water course or the ocean, the sewage treatment plant should be designed to meet the local Effluent Discharge Standards. In most locations, these standards are established on a case-by-case basis, so it is important to involve the local authority in the planning process as early as possible.

If the effluent will be used for irrigation, additional treatment is often required, and the degree of further treatment will depend on the type of irrigation system, and the requirements of the local authority.

Sludge will be produced in any type of sewage treatment system, and there are several methods available for processing and disposal, as discussed in the “Description of Sewage Treatment” section. A clear plan must be developed for processing and disposing of the sludge, and any necessary equipment and works required to implement the plan, should be incorporated into the overall sewage treatment project.

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