Dredging and Dewatering in New Jersey

PROFILE

A major chemical and petroleum marine terminal in New York Harbor needed to repair a liner in a wastewater basin that is part of the overall treatment train for the plant. The basin could not be isolated and needed to remain in service. Additionally, an onsite API separator needed to be cleaned while in service. Both projects generated material that needed to be significantly dewatered before disposal.

Handex employed one of our remote operated electric hydraulic dredges to remove the sediment from the basin while in operation. It was critical that the liner not be further damaged during dredging and that the basin remained operational until the repair. The material was then directly pumped to a shaker to remove any debris before being dewatered with a Handex 21” bowl skid mounted centrifuge. Once a sufficient amount of sludge was removed the dredge was taken out of the basin and Handex personnel using pumps removed the remaining material and cleaned the liner for inspection and repair. The repair was successfully completed by a Handex subcontractor.

The separator was then cleaned, and a volume reduction was performed by making a slurry and pumping the slurry from the API to a Handex 21” bowl skid mounted centrifuge. All material generated from the basin and API was placed in roll offs and transported to a licensed client approved disposal facility.

The project duration was 74 days and generated approximately 800 tons of dewatered cake for disposal.