The present invention discloses a black and odorous
water body dredging
system and method. The method comprises the following steps: setting an
enclosure dredging unit in a
river section to be dredged; determining the thickness of the surface
sediment that is prone to black and
odor through investigation, sampling and analysis, hydraulically flushing the surface
sediment in the
enclosure dredging unit, so that the surface black and odorous
sediment is fully floated to form a mud-water mixture, and quickly extracting the mud-water mixture from the
enclosure dredging unit, separating the non-polluted coarse sand particles in the mud-water mixture by physical
precipitation, and then discharging the remaining mud-water mixture containing the black and odorous sediment into a
sewage treatment facility. The
system comprises an enclosure dredging unit, a flushing
system, a sand-water
separation system and a gravity drain
pipe arranged in the
water body to be dredged. The black and odorous
water body dredging system and method provided by the present invention have strong dredging pertinence, convenient operation, small
working space, flexible movement, low dredging cost, and can be well applied to the dredging project of the surface sediment that is prone to black and odorous sediment in small and medium-sized rivers.