The Port of Antwerp, the Flemish government, and contractor Sereant, a partnership between Jan De Nul Group and DEME Group, will begin dredging and processing the most polluted dredging sludge at the port later this month. The dredging will focus on the removal of sludge with elevated organotin concentrations or tributylin (TBT), a compound used in ship paint since the 1970s to prevent the growth of mussels and algae on hulls.
The sludge at the port has been storing TBT over the course of several years and is gradually releasing contamination into the surrounding waters, disrupting the metabolism and hormone action of molluscs. Dredging will be carried out over a five-year period to remove an estimated 800,000 cubic metres of TBT-laden sludge, which will then be processed into a dry end product that can be safely stored on-site. (Source : Baird)
AZOV-BLACK SEA BRANCH ADDS TSHD SOMMERS TO ITS FLEET
The trailing suction hopper dredger (TSHD) Sommers was recently handed over to the AzovChernomorsky Basin Branch of FSUE Rosmorport. Previously, the dredger was operated by its North-Western Basin Branch for dredging in the seaport of Ust-Luga, Rosmorport said. TSHD Sommers is the lead vessel of a series of three vessels of the TSHD 1000 project, built in 2016 by order of FSUE “Rosmorport” at the “Krasnoye Sormovo” shipyard.
The TSHD is outfitted with a diesel driven dredge pump, a 4500m3 trailing suction pipe on the starboard side for excavation of different types of soils (grade 1-3) with dredging depth of 4 to 20 meters and hopper volume of 1,000 m3. The dredger is capable of transporting the excavated material to the discharge sites, unloading the material through the rod actuated bottom doors or to the shore through the bow connection to the onshore slurry pipeline, or using a rainbow discharge system to discharge materials at a distance of about 60 meters. (Source : Dredging Today)
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