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Title: Refinement of column settling test procedures for estimating the quality of effluent from confined dredged material disposal areas
Authors: Long-Term Effects of Dredging Operations Program (U.S.)
Palermo, Michael R.
Thackston, Edward L.
Keywords: Confined disposal facilities
Dredging spoil
Dredged material
Effluent quality
Water quality
Suspended solids
Publisher: Environmental Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Technical Report
Abstract: Column settling test procedures are used in designing confined dredged material disposal areas for effective sedimentation and initial storage of solids. This report presents the results of a study in which the test procedures were refined to allow a prediction of the effluent suspended solids concentration for conditions normally found when saltwater sediments are encountered. For this case, the dredged material normally settles by zone settling, forming a clarified supernatant in the confined disposal area. This study determined that the settling behavior of the fine particles initially remaining in the supernatant following zone settling is flocculent settling. Procedures were developed for predicting effluent concentrations as a function of retention time and other pertinent operating conditions. The ability to make such predictions is essential if total concentrations of contaminants in the effluent from confined disposal areas must be determined.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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