| 摘要 |
Treated sewage is loaded into the tanks of a large ocean-going tanker, transported therein to a deep water site, and then deposited directly onto the seabed at that site through piping deployed from the vessel and extending downwardly therefrom. The piping may be a flexible hose, or a string of steel pipes, or a combination of the two. The piping may be deployed over the side of the vessel, or preferably from a moon pool. The depth of the seabed for deposit might for example be one thousand or fifteen hundred meters, or considerably deeper, e.g., 7000 m; in extremely deep water it may not be necessary for the piping to extend fully to the seabed, although it is recommended that it extend at least below the depth at which the majority of fish are found and below the depth where there are significant thermal changes. The disposal tanker is provided with a hose reel and/or pipe erection plant and/or equipment for handling piping and for deploying the disposal piping from the tanker to the deep seabed disposal region. |
