Dr Kelvin Kemm is a nuclear physicist and chief executive of Stratek Business Strategy Consultants. Stratek@pixie.co.za. Photo: File
Dr Kelvin Kemm is a nuclear physicist and chief executive of Stratek Business Strategy Consultants. [email protected] Photo: File

Tech Track: SA engineers dig deep in Africa and France

By Kelvin Kemm Time of article published Jul 22, 2021

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BEFORE Covid-19 descended on the planet like a worldwide massive hail storm, the South African economy was taking a substantial knock. A sector badly hit has been engineering. We have witnessed the damage done to major engineering construction companies, which had risen to be amongst the best in the world.

The urgency of the situation caused some local engineering companies to start to look elsewhere for business. One such company is Arint Engineering, in Centurion, which does work in other African countries.

One project that I find interesting from a technological point of view is a methane energy project in Rwanda. It is a project to extract methane gas from a deep lake and then feed it to electricity generating internal combustion engines. The Rwandan lake is Lake Kivu, which is nearly 10 times the size of the Vaal Dam.

The lake contains exceptionally large amounts of dissolved carbon dioxide and methane and is 480m deep. The massive water pressure keeps the gases dissolved.

The carbon dioxide originates from two active volcanoes near the lake, the Nyamuragira and Nyiragongo. The volcanoes are amongst the most active in the world, and drive deep warm water, containing dissolved CO₂ into the bottom of the lake. Some interesting science keeps the warm water at the bottom of the lake.

Organic material falling from the lake surface then interacts with micro-organisms, which use the dissolved CO₂ to produce methane. But the immense pressure of the water keeps the methane dissolved in the water at the bottom. There is a huge amount of methane there, which is highly profitable to extract and is enough to drive a reasonable power station.

The engineering challenge is to get it out and to productively produce electricity. That is where Arint is involved. A consortium of international companies is currently extracting the methane. But this is dangerous work, and has to be done professionally and correctly. All sorts of things can go-bump-in-the-night if you make mistakes.

Arint operates from its headquarters in Centurion, but maintains a team at Lake Kivu. They ensure that operations are carried out in accordance with international standards. The processes and instructions are drawn up in Centurion and are then sent to Rwanda for implementation. These include; safety procedures and environmental management, among others. It is well-known in industry that if you carry out work in a safe and responsible manner it turns out to be the most cost-effective.

Aside from professional engineers, part of the Arint team is a rigger and a welding inspector. If you don't get rigging right, something large and valuable can fall, leading to loss of time in redoing the job, let alone the cost of possibly rebuilding a smashed assembly. The same holds true for welding. A weld failure could lead to having to re-weld the assembly, but at worst could lead to a catastrophic failure, which could cause loss of life or massive damage.

Interestingly, Arint has also designed a major engineering system in France. Arint managing director Francois Mellet told me, with some amusement, that they had to find a site in France "far away from inhabited areas". The best they could do in France was to use an existing sheep farm. There are no remote bush areas there, as there are here.

Of course, operating in France is completely different to operating in Rwanda. So a significant benefit of South African companies looking for work in foreign countries is the experience of being able to operate under different conditions.

I believe that South Africans are good at this, because life in South Africa has always been a case of operating in diverse and extreme areas, in comparison to many European countries who have been conditioned to face much less diverse environments, both geographically and politically speaking.

So any inducement to South African companies to operate in other African countries should stand them in good stead in the future. Any expanded vision gained now can only be beneficial in due course.

Dr Kelvin Kemm is a nuclear physicist and chief executive of Stratek Business Strategy Consultants. [email protected]

*The views expressed here are not necessarily those of IOL or of title sites


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