ODB SYSTEM
for oil-filled cables
Revolutionizing Cable Decommissioning: Oil degradation by bacteria.
Suitable for the decommissioning of oil/fluid insulated electricity cables.
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the decommissioning of oil/fluid insulated electricity cables
Client Case Study:
Biological Decontamination of Oil-Filled Cables at National Grid
Objective
The project at National Grid aims to showcase the effectiveness of a pioneering bacteria-based method for decommissioning high voltage fluid-filled cables. By validating the efficacy of this innovative solution, the ODB System demonstrates its ability to significantly reduce environmental impact, shorten project timelines, and minimize disruption to local communities.
National Grid plays a pivotal role in the energy systems of both the UK and the North-Eastern US. In the UK, the company owns and operates an extensive network, including 4,481 miles of overhead electricity lines, 1,417 miles of underground electricity cables, and 4,760 miles of high-pressure gas pipes. This network spans over 10,000 miles, equivalent to the distance from London to Sydney. National Grid’s UK operations involve transporting high-pressure gas and electricity from producers to operators, who then distribute it to homes and businesses.
In the US, National Grid’s network is even more expansive, comprising 8,881 miles of overhead power lines and an impressive 35,560 miles of gas pipelines – surpassing 1.4 times the length of the equator. Serving over 20 million people, National Grid
Problem Statement
High voltage fluid-filled cables, integral to transmission systems, pose a challenge during decommissioning due to the conventional nitrogen purging method’s limitations. This method typically removes only 40% of the oil during the initial purge, necessitating years of subsequent purging and extensive excavation. The environmental risks and community disruption associated with this process highlight the need for a more efficient and ecofriendly solution.
Methodology
The ODB System utilizes a bespoke combination of naturally occurring bacteria to degrade and mobilize hydrocarbons, achieving oil removal rates exceeding 95% within 14 to 16 weeks. This method eliminates the need for extensive excavation and subsequent purging, reducing environmental risks and community disruption. The project consists of four phases: oil profiling, mobilization, cable treatment, and reporting/finalization.
Scope
The ODB System utilizes a bespoke combination of naturally occurring bacteria to degrade and mobilize hydrocarbons, achieving oil removal rates exceeding 95% within 14 to 16 weeks. This method eliminates the need for extensive excavation and subsequent purging, reducing environmental risks and community disruption. The project consists of four phases: oil profiling, mobilization, cable treatment, and reporting/finalization.
Result
The implementation of the bacteria-based solution demonstrated exceptional efficacy in removing oil from cables, surpassing the 95% target within the specified timeframe. Moreover, the reduced environmental impact and minimized community disruption validate the solution’s superiority over conventional methods.
Conclusion
This case study underscores the transformative potential of bacteria-based bioremediation in cable decommissioning. By significantly enhancing efficiency, reducing environmental risks, and mitigating community disruption, this innovative approach sets a new standard for sustainable infrastructure management.
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