How does the closed toilet of passenger trains in China s railway yards leak pollution? Do you use a

There are three main forms of general railway station ground unloading system: the first is to apply the principle of vacuum suction to build a fixed vacuum center near the sewage discharge line, set up a sewage suction pipe along the sewage discharge line in the position corresponding to the train sewage tank, use a vacuum sewage discharge pump to carry out suction, these sewage suction pipes are connected to the vacuum center through the dry pipe, and the sewage is sucked down through the sewage suction pipe and then discharged to the designated place, the suction efficiency and automation degree of this sewage discharge mode are relatively high, and it is widely used in Europe and some developed regions. China's high-speed rail stations also use this technology; The second is to use the gravity of the sewage in the sewage tank to let it flow naturally into the main sewage discharge pipeline, which is less efficient and is only used in Japan; The third is the sewage suction vehicle, the sewage suction vehicle is limited in its unloading capacity, and it is mainly a supplement and backup for various fixed sewage unloading devices.

Trains usually line up directly under the tracks, right? Is there that kind of sealed toilet on the railroad now? I don't know much.

However, airplane sealed toilets will use vacuum sewage suction pump trucks to deal with toilet filth.