The invention relates to the technical field of the dredging of river courses, and discloses an environment-friendly
system for dredging a river course and treating bottom mud in an on-line manner. The environment-friendly
system comprises a vacuum mud suction ship, a bottom mud dehydrating and
drying ship and an operation
management system, wherein the vacuum mud suction ship is provided with a vacuum mud suction device; the bottom mud dehydrating and
drying ship comprises a dosing device used for accelerating the
flocculation and deposition of
slurry of
silt as well as a
sludge / garbage separating device, a
sludge concentration tank, a
sludge conveying pump, a belt sludge
filter press and a filter tank, which are arranged according to the
treatment sequence of the sludge and are further connected in sequence; a sludge outlet end of the vacuum mud suction device on the vacuum mud suction ship is connected to the sludge / garbage separating device on the bottom mud dehydrating and dryingship through a mud
discharge pipe; the filter tank is connected to the sludge concentration tank through a
sewage pump and a pipeline; a supernatant solution overflow
pipe is arranged in the sludge concentration tank. The environment-friendly
system is used for realizing the continued and streamlined on-line operation of the dredging of the river course and the treatment of the bottom mud; the dredging is free from disturbance; the
slurry does not fall to the ground, and the residual water is discharged up to a standard.