Valorisation of Dredged Sediments

Jul 15, 2024

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Context:

The Union Ministry of Ports, Shipping, and Waterways (MoPSW) has sanctioned a research project titled “Valorisation of Dredged Sediments.”
According to the ministry, the project has been approved at an estimated cost of Rs 46,47,380.

Project Overview

Objective: To create value from dredged sediments by converting them into aggregates suitable for various construction fields.
The Indian Institute of Technology Bombay (IIT Bombay) will carry out the project over three years.
It aims to reuse sediments as raw material for civil engineering and other purposes.
It can also reduce the strain on natural resources and eliminate waste.

Implications:

This approach not only reduces waste but also turns the byproduct into a valuable resource for manufacturing, thereby addressing environmental concerns and optimising resource use.
This research initiative marks a significant advancement in sustainable maritime practices.

Dredged sediments can benefit the real estate sector:

Dredging helps maintain water depth and clarity in waterways, which is crucial for preserving the value of waterfront properties.
It can be used to replenish and stabilise eroding shorelines around waterfront properties, protecting them from damage and preserving the usable land area.
It removes pollutants and makes it safer and more appealing for recreational activities like swimming, boating, and fishing which enhances the desirability and value of waterfront real estate.
Using them as construction fill or soil amendment can provide a cost-effective source of materials for real estate development projects.

About Dredging:

Dredging is the removal of sediment and debris from water bodies to maintain or increase depth for navigation and other purposes.
Necessity: Sedimentation—the natural process of sand and silt washing downstream—gradually fills channels and harbours. It contains pollutants, so dredging cleans up contaminated areas and protects ecosystems.
Economic Importance: It supports international trade by ensuring safe passage for large cargo ships.
Pollutant Sources: Point sources (Sewer overflows, municipal and industrial discharges, and spills) and Nonpoint sources (Surface runoff and atmospheric deposition).
Regulatory Bodies: The EPA and the US Army Corps of Engineers (USACE) manage and regulate it under the Clean Water Act (CWA) and the Marine Protection, Research, and Sanctuaries Act (MPRSA), also known as the Ocean Dumping Act.

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