Where does the toilet in the city go down the drain after the toilet is drained?

This problem cannot be explained in a few words, and if it is a seaside city, it is generally treated and the wastewater is transported to the sea more than a dozen nautical miles away.

Generally speaking. I just found out that it was going to go to the toilet and put it in the toilet immediately. >>>More

Bury a storage tank deep in the ground, store the dirt, store it for a period of time, and then use professional equipment to suck the dirt away and dispose of it, it's okay, and the countryside is now using this method.

There is a water tank (with clean water) on the plane, and a sewage tank. The urine and urine on the plane are pumped to the sewage tank for storage through the pressure difference between the inside and outside of the plane (in fact, at high altitude, the outside world is regarded as a vacuum) in the sky, and when the plane falls to the ground, there are airlines or special sewage trucks at the airport to connect the sewage to the car. >>>More

Here's how my teddy dog is trained: when they are 21 days old, I put a square white steel plate next to their litter, about 33 centimeters wide and 66 centimeters long, and spread old newspapers and smear their urine. Grab it several times a day and put it on a plate, and as it grows, it moves farther and farther away. >>>More