请修正润色The above-mentioned ship sewage is what we are accustomed to calling blackwater and regulations have strict standards and restrictions on its discharge There is also a type of drainage from galle

The ship sewage mentioned above, commonly known as blackwater, is subject to strict regulations and restrictions regarding its discharge. Additionally, there is another type of wastewater generated from activities such as galley washing, bathing, laundry, and washbasins, which is known as gray water. Currently, the discharge of gray water is only prohibited in water source protection areas and other special protection areas, while there are no specific requirements for its discharge in non-protected waters. The term "holding tank" refers to a tank designed for the collection and storage of sewage.