Major industrial harbours and rivers are often confronted with many serious environmental problems with contaminated silt. There is much more to be done to ensure the continuing quality of life and nature. In Wiesbaden, West Germany, the banks and bottom of the River Rhine were polluted with thick oil particles which were spilt due to a leakage of cooling oil from a chemical plant.
We cleaned the banks and bottom of the river using hydraulic dredging together with a specially developed sweep head. Alongside a quay wall we pumped the contaminated materials into a 2,000 m3 hopper barge where huge geotextile containers were installed. Polymer and Iron Chloride were injected to speed up the dewatering.
Finally, all oil and slurry was stored in several hopper barges of 2,000 m3 each and, with a cascade solution, the free water flow was pumped through an active carbon filter system before being pumped back into the River Rhine. The barges were transported to a special reclamation factory where the geotextile and dewatered oil silt were separated for rehandling.