Nordevco Associates Ltd.

In situ treatment of canal sediments case study


Courtesy of Nordevco Associates Ltd.

The Problem
Rivers and waterways have traditionally been the focus of industrial construction and commerce. Throughout the world, cities have grown and flourished on the banks of major inland waterways. Additionally, major industrial development has focused on these same inland waterways.

These waterways provided and continue to provide a cost effective transportation system for the movement of raw materials to these plants and finished products away from the plants for distribution to end users.

As a result of this urban and industrial development, organic waste from sewage dumping and pulp and paper mills, and chemicals from petroleum, steel and other industries have contaminated sediments numerous harbours, lakes, rivers and canals around the world. While urban/industrial development patterns are similar throughout the world, this is an environmental issue that affects every country in
the world.

The Technology
Nordevco’s BactiDomus Technology was developed by a diversified group of research scientists working together at Universities in Belgium and France. Their goal was to create a mechanism with the flexibility to delivery biological solutions to a range of environmental issues more effectively and efficiently The foundation for the success of the BactiDomus Technology was the development team’s clear understands that for any carrier material to be successful it had to meet specific underlying needs of the organisms:

  • Regardless of the organisms used, they would be cultured in a sterile laboratory and would require time to acclimate to the environment they were activated in.
  • Microorganisms, like humans, do not exist or thrive in isolation of each other but rather rely on others for stimulation and competition;
  • Organisms prefer to grow and live in colonies or flocs and prefer to attach to something to anchor these colonies;
  • Individual species of microorganisms do not work in isolation to break down organic compounds. To successfully break down any organic completely to CO2 and H20, a variety of different organisms are required;

The result of that work is the BactiDomus Technology which is based on the use of an inorganic limestone-like porous carrier material. The porosity of the material allows it to be bathed in a nutrient broth, absorbing key micro-nutrients that act as an initial food source when the product is activated. It is then impregnated with a range of different naturally occurring and non-pathogenic organisms, selected for their ability to breakdown specific organic contaminants.

The organisms selected for inclusion are selected based on the understanding that each contaminated environment can be aerobic, anaerobic or facultative anaerobic. Therefore, aerobic, anoxic and anaerobic organisms are selected and used in each product to ensure that they can function successfully in a broad range of environments.

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