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How Optimized Energy Management Delivers Reliability, Efficiency and Sustainability at Fekola Mine in Mali

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Fekola Mine Mali

By Luke Witmer

Since B2Gold first acquired the Fekola gold mine, located in a remote corner of southwest Mali, exploration studies revealed the deposits to be almost double the initial estimates.

A recent site expansion has just been completed, and while the existing power units provide enough power to support the increase in production, the company sought to reduce its energy costs, cut greenhouse gas emissions, and increase power reliability.

The addition of a 35MWp solar photovoltaic (PV) plant and 17MW/15MWh of energy storage to the existing 64MW thermal engine plant was decided. This new energy mix is anticipated to save over 13 million litres of fuel, reduce carbon emissions by thirty-nine thousand tons per year, and generate a payback in just over four years.

Such an elaborate hybrid configuration needs a powerful brain to deliver on all its potential: Wärtsilä’s GEMS, an advanced energy management system, has been set up to control the energy across the fleet of power sources, thermal, renewable, and battery storage.

The integration, control, and optimization capabilities provided by GEMS allow the thermal units to be run at the most efficient rate and enable the battery storage to handle the large load step changes and volatility of the solar PV generation assets.

Integrated Hybrid Energy Solution

In the context of the Fekola mine, which is an off-grid electrical island, the battery is performing a lot of different services simultaneously, including frequency response, voltage support, shifting solar energy, and providing spinning reserves. The energy load is very flat, with a steady consumption rate around 40MW as the mining equipment is operating consistently, 24/7.

However, if an engine trips offline and fails, the battery serves as an emergency backstop. The controls reserve enough battery energy capacity to fill the power gap for the time it takes to get another engine started and the software inside each inverter enables the battery to respond instantaneously to any frequency deviation.

The reciprocating engines operate most efficiently at 85-90 per cent of their capacity, this is their “sweet spot”. But if there is a sudden spike in demand, if a little more power is needed, or if mining equipment is coming online, then another engine needs to be run to meet the extra load. With the battery providing spinning reserves, the engines can be kept running at their sweet spot, reducing the overall cost per kilowatt-hour.

Moreover, with the solar plant providing power during the day, three to four engines can be shut down over this period, providing a quiet time to carry out preventive maintenance. This really helps the maintenance cycle, ensuring that the engines operate in a more efficient manner.

Solar PV volatility can be intense. On a bright day with puffy clouds passing by a solar farm of this size can easily see ramps of 25MW over a couple of minutes. This requires intelligent controls, dynamically checking the amount of solar that can be let into the grid without causing an issue for the engine loadings or without overloading the battery.

Conducting the Orchestra

The GEMS intelligent software provides the optimization layer that controls all the power sources to ensure that they work together in harmony. The user interface (UI) gives access to all the data and presents it in a user-friendly way.

Accessible remotely, all operations are simulated on a digital twin in the cloud to verify the system controls and simulate the most efficient operating scenarios to lower the cost of energy. This is an important software feature, both during and after commissioning as it allows operators to train on the platform ahead of time and familiarise themselves with the automated controls and dynamic curtailment of renewables. The UI provides the forecast for renewables and the battery charge status at any given moment, it can provide push email or phone notifications for alerts; telling operators when to turn off an engine and when to turn it back on.

The software is constantly analysing the data and running the math to solve the economic dispatch requirements and unit commitment constraints to ensure grid reliability and high engine efficiency. Load forecasting integrates the different trends and patterns that are detectable in historic data as well as satellite-based solar forecasting to provide a holistic approach to dispatching power. The Fekola site has a sky imager, or cloud tracking camera with a fisheye lens, that provides solar forecasts for the next half hour in high temporal resolution.

To ensure that operators really understand the platform, and have visibility over the advanced controls, the UI provides probability distributions of the solar forecast. Tracking the forecast errors enables operators to see whether the solar is overproducing or underproducing what the forecast was expecting at the time and provides visibility to the operators on the key performance indicators. This feedback is an important part of the machine/human interface and provides operators with insight if an engine is required to be turned on at short notice.

Automated curtailment enables the optimization of the system providing a reactivity that people cannot match. By continually monitoring the engine loadings and battery, the system is ready to clamp down on solar if it gets too volatile or exceeds some spinning reserve requirement.

For example, if a large, unexpected cloud arrives, the battery is dispatched to fill the gap while the engines ramp up. Once the cloud disappears, however, the engines remain committed to operating for a few hours, and the solar power is transferred to recharge the battery.

Over time, as load patterns shift, the load forecasting algorithm will also be dynamically updated to match the changing realities of the load. As mining equipment hits layers of harder rock, increasing the power load, the system will adjust and dispatch the engines accordingly.

Hybrid solutions will become the new gold standard for off-grid heavy energy users

The Fekola mine project incorporates the largest off-grid hybrid power solution in the world, demonstrating the growing case for clean energy and its sustainable and economic potential for mines in Africa and beyond.

As the cost of batteries and solar panels continues to become more competitive, hybrid solutions are proving to be a realistic and effective means for increasing energy reliability and lowering operating costs in any context, thus freeing up resources to improve the human condition; whether through cheaper materials and gainful employment, or by providing broader access to reliable electricity for healthcare, education, and improved quality of life.

Luke Witmer is the General Manager, Data Science at Wärtsilä Energy Storage and Optimization

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Navigating the Maze: Solutions for Nigeria’s Flourishing Foodtech Industry

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Diana Tenebe food security challenges in Nigeria

By Diana Tenebe

Nigeria’s foodtech sector holds immense promise to transform our nation’s food production, distribution, and consumption systems. However, this burgeoning industry currently navigates a complex maze of challenges that could significantly hinder its progress.

While innovation and entrepreneurial drive are abundant, a confluence of infrastructural deficits, economic headwinds, technological disparities, and logistical complexities casts a shadow on the sector’s long-term viability.

Understanding and addressing these multifaceted hurdles is paramount for foodtech companies aspiring to thrive and contribute meaningfully to Nigeria’s food security.

One of the most significant impediments to the foodtech sector’s advancement is Nigeria’s persistent infrastructural weaknesses. The unreliable power supply, a well-known constraint for businesses nationwide, directly threatens food preservation, increasing spoilage risks and driving up operational costs for companies reliant on refrigeration and consistent processing.

Similarly, the often-deteriorated state of our road networks complicates logistics and transportation, hindering the efficient movement of goods from farms to consumers and across the supply chain.

Furthermore, limited access to clean water exacerbates operational challenges, particularly for maintaining food processing and hygiene standards. Collectively, these infrastructural shortcomings inflate operational expenses and introduce vulnerabilities throughout the food supply chain.

Economic constraints add another layer of intricacy. Fluctuations in currency exchange rates create instability in pricing and procurement, especially for businesses dealing with imported technologies or ingredients. Persistent inflation erodes consumer purchasing power and increases the cost of essential inputs, squeezing profit margins for startups.

Moreover, limited access to credit and investment capital makes it difficult for emerging foodtech companies to secure the necessary funding to invest in crucial technology, infrastructure, and expansion efforts. This financial constraint can stifle innovation and prevent promising ventures from reaching their full potential.

The digital divide also poses a unique challenge for foodtech companies aiming to leverage online platforms and digital solutions. While mobile phone usage is widespread in Nigeria, disparities in digital literacy and access to reliable internet connectivity can restrict the widespread adoption of online food ordering and delivery services, particularly in rural and underserved communities. This necessitates creative and inclusive strategies to bridge the digital gap and reach a broader consumer base.

Inefficiencies within the supply chain represent a critical bottleneck in the Nigerian food system. Fragmented agricultural supply chains, characterised by numerous intermediaries and a lack of transparency, contribute to alarmingly high post-harvest losses.

Inadequate storage facilities and inefficient transportation infrastructure further compound these issues, leading to significant waste and price volatility. Addressing these systemic weaknesses is crucial for ensuring a stable and affordable food supply for all Nigerians.

Navigating Nigeria’s regulatory landscape can also be a daunting task for foodtech businesses. The presence of multiple regulatory agencies, coupled with often bureaucratic and time-consuming processes for obtaining licenses and permits, can create significant hurdles for startups. Clear, consistent, and streamlined processes within the regulatory framework are essential to foster a more enabling environment for innovation and growth.

Building consumer trust and acceptance for new food technologies requires overcoming inherent skepticism and unfamiliarity. Concerns regarding food safety, quality, and the security of online transactions can hinder the adoption of novel food products and digital platforms. Transparent communication, robust quality control measures, and consistent consumer engagement are vital for building confidence and fostering widespread acceptance.

Finally, a notable talent gap exists within the Nigerian foodtech ecosystem. A shortage of professionals possessing specialised skills in food science, technology, business management, and logistics can limit the growth and innovation capacity of companies in this sector. Addressing this skills deficit through targeted training and development initiatives is crucial for long-term success.

Despite these significant challenges, promising pathways forward can be forged through innovative and context-specific approaches. Investing in localised infrastructure solutions, such as independent power generation and efficient localised logistics networks, can mitigate the impact of broader infrastructural deficiencies.

Exploring diverse funding avenues beyond traditional banking, including angel investors, government grants, crowdfunding, and revenue-based financing, can alleviate financial constraints.

Adapting to the digital divide by leveraging basic mobile technology and employing offline strategies like local agent networks can expand reach and inclusivity. Building resilient supply chains through direct farmer relationships, investing in aggregation centres, and utilising technology for farm management offer tangible solutions to logistical inefficiencies.

Proactive engagement with regulatory bodies and advocating for clearer, more supportive policies are crucial for navigating the regulatory landscape effectively. Building consumer trust necessitates transparent sourcing practices, clear communication about product benefits and safety, and active engagement with consumer feedback.

Finally, investing in talent development through collaborations with educational institutions and in-house training programs can bridge the critical skills gap.

Foodstuff Store is emerging as a business with a clear vision to directly confront several of these challenges. We are actively developing a decentralised network of businesses supported by strategically located distribution hubs across target states. This approach will directly address the limitations imposed by poor road networks, ensuring more localised access to our food products.

Furthermore, the establishment of regional storage facilities, including a state-of-the-art solar-powered cold storage, directly tackles infrastructural deficiencies related to food preservation and ensuring a consistent supply.

Foodstuff Store’s ambition for end-to-end management of the food supply chain, encompassing in-house production, direct sourcing, advanced storage solutions, and efficient distribution, offers a powerful solution to existing supply chain inefficiencies.

This integrated approach promises enhanced quality control, significant reductions in post-harvest losses, and a more reliable supply of both perishable and non-perishable goods for our customers.

Our aspiration to become the “Amazon for Food Products” is a clear and ambitious goal underpinned by a technology-driven approach to all aspects of our operational management. Foodstuff Store’s vision underscores a business model strategically designed to overcome significant hurdles within the Nigerian foodtech sector, offering a beacon of potential and a pathway to a more secure and efficient food system in a challenging yet remarkably promising landscape.

By Diana Tenebe is the Chief Operating Officer of Foodstuff Store

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President’s Katsina State Visit Exposes Disconnect from People’s Needs

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tinubu in katsina

By Abba Dukawa

The recent visit by the President Bola Tinubu to Katsina State has sparked concerns about the disconnect between the government’s priorities and the people’s needs. The visit exposed the hypocritical approach to the need of their people, states and the northern Nigeria as whole. The quality of leadership in the region has been questioned, with allegations of self serving  interest, ineptitude, and a lack of vision.

This is in spite of the fact that northern Nigeria as a whole faces numerous challenges that threaten its stability and development. Some of the key issues include insecurity, poverty, education, economic hardship, inequality and social and cultural challenges. The visit has been seen as an opportunity missed to engage with the state’s residents, listen to their concerns, and chart a way forward for development.

While the visit was marked by displays of pageantry and entertainment, the state’s pressing issues such as insecurity, poverty, and economic hardship, seemed to take a backseat.  Critics argue that the government’s focus on superficial events rather than addressing the root causes of the state’s challenges is a clear indication of a disconnect from the people’s needs.

The introduction of Rarara’s wife to the President by the Katsina State Governor, contravening cultural and religious norms, raise questions about leaders’ priorities and values.

Current leaders in the north seem more focused on personal interests and political survival than advocating for the northern Nigeria improvement.

Regardless of the challenges in the region the Governors  keep  praise for the President’s economic reforms, notwithstanding the region’s struggles, is concerning. economic reforms should lift people out of poverty, create jobs, and stimulate growth. If not yielding tangible benefits, they need reevaluation.

The north needs leaders prioritizing regional development and working towards a brighter future. Leaders understanding our region’s problems and committed to tackling them head-on are crucial. It’s time for a shift in approach, prioritizing people’s needs over personal interests.

As we move forward, we must demand more from our leaders. We need leaders who will stand up for the north and work tirelessly to find solutions. Anything less is a disservice to the region and its people.

We need leaders who cultivate a culture of good governance, prioritizing accountability and transparency to address insecurity and promote development.

The north needs a visionary leaders who prioritize all citizens’ needs, regardless of tribe or religion, are crucial for unity and stability.

Leaders who accelerate economic development, create jobs, and provide essential services like education and healthcare can reduce poverty and insecurity.

We require leaders who will combat corruption and promote social justice, reducing inequality and fostering stability.

In northern Nigeria, effective security reforms are necessary, including modernizing security agencies, enhancing intelligence gathering, and addressing insecurity’s root causes to ensure public safety.

To bridge the gap between the government and the people, there is a need for leaders who understand the intricacies of the state’s problems and are committed to tackling them head-on. By prioritizing the people’s needs and working towards sustainable development, the government can build trust and foster a sense of ownership among its citizens

May God guide Nigeria towards true development and prosperity.

Dukawa, a concerned Nigerian, can be reached at abbahydukawa@gmail.com

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Changing University Climate: It’s No Longer “Publish or Perish,” It’s “Be Visible or Vanish”

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Publish or Perish Timi Olubiyi

By Timi Olubiyi, PhD

For decades, the expression “publish or perish” has been of interest to academics, researchers, and professionals worldwide. Success is measured by the total number of peer-reviewed articles published, conference proceedings available online, and book chapters produced and published.

Despite so much research stemming from academic institutions, not many of these publications enjoy wide visibility in particularly those published in non-indexed journals.

Academics are continuously encouraged to increase the impact of their research endeavours, but what really constitutes impact in today’s academic environment?  Is it the number of citations for your published research?  Is it the amount of research funds your name and profile can generate?  Is it the number of speeches and presentations you deliver about your research area?  Is it the number of boards/committees/working groups that you serve on? And so on.

Though in the academic world, publication signifies validation and survival in most universities for promotion and relevance; in fact, it remains a cornerstone of career advancement. From early-career lecturers to senior professors, scholarly publishing plays a pivotal role in demonstrating expertise, building reputation, and meeting institutional benchmarks for promotion.

However, in today’s hyper-connected, information-saturated environment, a compelling principle has emerged: “Visible or vanish.” In other words, it is not just what you publish; it is who sees it, talks about it, and shares it that matters. Today, there is a stronger emphasis on quality, impact, relevance, and where your articles are published.

Globally, publications in high-impact journals measured and indexed in Scopus, Web of Science, Australian Business Deans Council (ABDC), Chartered Association of Business Schools (ABS), Science Citation Index Expanded (SCIE), Social Sciences Citation Index (SSCI), Directory of Open Access Journals (DOAJ), and more are given serious emphasis.

The primary reason for academic publication should be to advance knowledge, not merely for promotion or institutional expectations. In the author’s opinion, the true reasons for academic publication are to help scholars establish their intellectual identity, which represents a personal academic brand, provide a platform for international recognition, and create career milestones.

Though the gatekeeping role in academia has diminished, this has created a market for predatory journals for academics aiming for promotion. What are predatory journals? They are journals that are fraudulent or unethical academic journals that pretend to be legitimate scholarly publications but do not follow proper peer-review standards, editorial practices, or have recognized indexation.

All they need is money, money and money, no values or integrity. Predatory journals prioritize profit over quality and can seriously harm the academic career of a scholar with a global vision.

Though academic publications still remain respected, considering indexation is key even for institution-based journals (Journals run by university departments). Publication remains the foundation of academic promotion, but how and where academics publish matters more than ever.In an academic environment that is increasingly competitive, interdisciplinary, and global, researchers must not only produce excellent work but also strategically position it for maximum visibility and influence.

Both academics and researchers must consider more than just publication because we have only two key roles in publishing- to do our research and to communicate the research; the latter is the focus of this piece. Our research needs to be noticed, cited, and discussed due to its impact, or we risk being completely overlooked.

Platforms like Google Scholar, ResearchGate, LinkedIn, Facebook groups, Twitter (now X), and even TikTok have become unexpected grounds for attention. Researchers who communicate their work beyond academic circles through public lectures and engaging online posts amplify their impact dramatically.

A highly cited, visible paper can transform careers far faster than a series of obscure journal articles ever could. Therefore, for relevance and global standards, a quality publication with visibility is required.

Visibility today means publication with recognition, a visibility that can connect researchers to a broader global academic community. It can also enhance career and funding opportunities beyond the immediate environment of the researcher.

When publication is executed correctly, it has the potential to create change beyond academic circles, influence policies, and shape professional practices. It can also raise public awareness on critical issues like climate change and inequality.

With millions of articles published annually, even excellent research can be buried unless actively promoted to make it widely visible. Good visibility can also improve invitations for collaborations, keynote addresses, consulting engagements, and even career pivots beyond academia. Visibility, thoughtfully pursued, is no longer optional; it is extremely important. It may also help fulfil deeply personal motivations.

However, remember that scholarly publishing is not a one-way communication. It should encourage and invite critique, discussion, and debate; that is what visibility can provide. Research that enjoysvisibility has a higher chance of influencing policy, industry practices, and public understanding

It is safe to say it is key for researchers, scholars and academics to navigate this new landscape.Visibility is increasingly vital in academia as it directly influences career progression, research significance, and the capacity to engage with a broader audience. Enhanced visibility can connect to opportunities for international research partnerships, funding, and new audiences globally.

In the current competitive academic environment, merely publishing research is insufficient; scholars must proactively advocate for their work and establish a robust online presence to guarantee visibility and media attention. In an era of increasing pressure to publish quickly and frequently, remembering these true reasons can help academics stay focused on purpose over performance, ensuring that their contributions are not only counted but truly matter.

Therefore, publish wisely, publish well, and publish with purpose, along with incredible consistency. In the contemporary technological era, the way research information is handled, conveyed, processed, shared, and maintained has changed.Therefore, my colleagues, be a thought leader, there is a need to gravitate towards social media because it can improve visibility and also to promote research findings or knowledge thereof. So, welcome to the era of visible or vanish. Good luck!

How may you obtain advice or further information on the article? 

Dr Timi Olubiyi is an expert in entrepreneurship and business management, holding a PhD in Business Administration from Babcock University, Nigeria. He is a prolific investment coach, author, columnist,seasoned scholar, Chartered Member of the Chartered Institute for Securities and Investment (CISI), and a registered capital market operator with the Securities and Exchange Commission (SEC). He can be reached on Twitter at @drtimiolubiyi and via email at drtimiolubiyi@gmail.com for any questions, reactions, and comments.

The opinions expressed in this article are those of the author, Dr. Timi Olubiyi, and do not necessarily reflect the views of others.

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