In the third part of the screen the residual water is pressed out of the sludge, at a minimum filter cake thickness, by the pneumatic counterpressure cone at the press discharge.
The main function of vacuum sucking sewage truck is to suck and transport the dejecta and sullage and carpolite and the other liquid mixing big suspend impurity for Environment Protection in city.
Loach about 10 cm long, yellow sand, yellow sand that they are not exact, because of their paranotum, back dotted with black spots and tidy, like the black stripes, seen from afar like a sand silt .