Rapid Dewatering Techniques for Dredged Lake Sediments. Literature Review and Summary Report

摘要

Sediment removal from lakes and other water bodies has proven to be an effective method for removing contaminants and limiting the internal recycling of nutrients. There are many methods for dredging sediments, and in each case, the disposal of the dredge material presents the greatest challenge in project design. The disposal of dredge materials is often complicated by the lack of land around a water body that is available for disposal. The use of rapid dewatering technologies can mitigate the lack of available land for disposal and facilitate lake dredging projects primarily in urban areas. Rapid dewatering is defined as any process that accelerates the separation of solid and water fractions in dredge slurries, and the use of rapid dewatering techniques often reduces the amount of land needed for disposal. This report provides a review of recent advances in the rapid dewatering of dredged sediments. Information presented in this report was obtained through the review of published literature, 'gray' literature, technical association proceedings, interviews with vendors and service providers and the experience of BCI Engineers & Scientists, Inc. (BCI).