| 主权项 |
1. A system for controlling and treating gas emanations within a wastewater access shaft, the access shaft having an internal wall, an upper edge and a bottom delimiting a substantially vertical chamber, which vertical chamber is divided transversely by the system into a lower section and an upper section, the system including:
a cover having a main upper surface, the cover including:
at least one pivoting part, which is normally closed, having a substantially horizontal rotation axis and allowing solid and/or liquid matter falling onto the main upper surface of the cover to pass toward the lower section of the vertical chamber;a raised part situated on the top of the cover and having at least one lateral wall including a plurality of orifices situated vertically above the main upper surface, the orifices defining an outlet of a gas-emanations circuit, which circuit is formed between the underside and the top of the cover; a device to connect the cover to the internal wall of the access shaft; an air filter arranged across the gas-emanations circuit formed in the cover; and a gas-emanations treatment liquid reservoir, the liquid reservoir being in fluid communication with the air filter in order to moisten air filter with the treatment liquid. |
