Opinion
The Oracle: Chief (Mrs) Margaret Ekpo and Hajia Gambo Sawaba in History (Pt 15)
Published
5 years agoon
By
Eric
By Chief Mike Ozekhome
Margaret Ekpo (1914-2006), a Nigerian women’s rights activist and social mobilizer, who was a pioneering female politician in the country’s First Republic and a leading member of a class of traditional Nigerian women activists. She played major roles as a grassroot and nationalist politician in the Eastern Nigerian city of Aba, in the era of an hierarchical and male-dominated movement towards independence, with her rise not the least helped by the socialization of women’s role into that of helpmates or appendages to the careers of males.
EARLY LIFE AND EDUCATION
Margaret Ekpo was born in Creek Town, Cross River State, to the family of Okoroafor Obiasulor and Inyang Eyo Aniemewue. She reached standard six of the school leaving certificate in 1934. However, tragedy struck at home with the death of her father in 1934, her goals of further education in teachers training was as a result put on hold following her father’s death. She subsequently settled for a ‘pupil-teaching job,’ teaching at various elementary schools until she got married, in 1938, to a Yaba High School-trained medical practitioner, Dr. John Udo Ekpo. He was from the Ibibio ethnic group who are predominant in Akwa Ibom State, while she was of Igbo and Efik heritage. She later moved with her husband to Aba.
Ekpo’s determination to advance her education motivated her to obtain a diploma in Domestic Economics in 1948 at the Rathmine School of Domestic Economics in Dublin Ireland, during the period her husband was taken there for medical attention. When the couple returned to the country, Ekpo established a Domestic Science Institute (DSI), where she trained young girls in dress-making and home economics.
MARGARET’S ARRIVAL ON THE NATIONAL SCENE
Margaret Ekpo’s first direct participation in political ideas and association was in 1945. Her husband was indignant with the colonial administrator’s treatment of indigenous Nigerian doctors but as a civil servant, he could not attend meetings to discuss the matter. Margaret Ekpo then attended meetings in place of her husband, the meetings were organized to discuss the discriminatory practices of the colonial administration in the city and to fight cultural and racial imbalance in administrative promotions. She later attended a political rally and was the only woman at the rally, which saw fiery speeches from Mbonu Ojike, Nnamdi Azikiwe and Herbert Macaulay.
Not content with being the only woman at political meetings, Ekpo devised ingenious ways of encouraging the participation of the women folk in Aba, her base, during the early years of her political career in 1945. She wanted more women to become members of the Aba Market Women Association, so that she could pass on information from her meetings to them, but their husbands would not let them. Luckily, After World War II, there was a general scarcity of salt, an item no household could be without. Ekpo went round the shops and deposited money for all available bags of salt, giving her control of its sales. She ordered that any woman who was not a member of the association should not be sold to. Resultantly, all the men released their women to register.
At the end of the decade Ekpo had organized a Market Women Association (MWA), in Aba. She used the MWA to promote women solidarity as a platform to fight for the economic rights of women, economic protections and expansionary political rights of women.
Margaret’s awareness of growing movements for civil rights for women around the world prompted her into demanding the same for the women in her country and to fight the discriminatory and oppressive political and civil role played in the suppression of women. She felt that women abroad were already fighting for civil rights and had more voice in political and civil matters than their counterparts in Nigeria. She later joined the decolonization-leading National Council of Nigeria and the Cameroons (NGNC), as a platform to represent a marginalized group.
In the 1950s, Margaret teamed up with Funmilayo Ransome-Kuti to protest killings at an Enugu coal mine. The victims were leaders protesting demeaning colonial practices at the mine. In 1953, Margaret was nominated by the NGNC to the regional House of Chiefs, and in 1954, she established the Aba Township Women’s Association (ATWA). As leader of the new market group, she was able to garner the trust of a large number of women in the township and turn it into a political pressure group. By the following year, women voters in Aba had outnumbered male voters in a city wide election. She won a seat to the Eastern Regional House of Assembly in 1961, a position that allowed her to fight for issues affecting women at the time. After a military coup ended the First Republic, she took a less prominent approach to politics.
MARGARET’S IMPERISHABLE STRIDES AND ACHIEVEMENTS
Ekpo was one of three women appointed to the House of Chiefs, in the 1950s – besides Mrs. Olufunmilayo Ransome Kuti (appointed into the Western Nigeria House of Chiefs) and Janet Mokelu (appointed along with Margaret Ekpo into the Eastern Nigeria House of Chiefs). She went on to serve her nation in several other capacities; as the Nigerian representative to the Inter-Parliamentary Union Conference (1964), Nigerian representative to the World Women’s International Domestic Federation Conference (1963), Member of Parliament, Government of Nigeria (1960 – 1966), women’s interest representative to the Nigerian Constitutional Conference (1960), a delegate to the Nigerian Constitutional Conference (1959), a delegate to the Nigerian Constitutional Conference (1953 and 1957), women’s interest representative to the Eastern House of Chiefs, Nigeria (between 1954 and 1958) and member, Eastern House of Chiefs, Nigeria (between 1948 and 1966). In 2001, Calabar Airport was named after her.
MARGARET’S PAINFUL EXIT
Margaret died on 21st September, 2006, at the University of Calabar Teaching Hospital. She was aged 92. There is no way the history of Nigeria can be written without including the name of this legend.
HAJIA GAMBO SAWABA
Hajia Gambo Sawaba (1933-2001), was a luminous Nigerian politician and activist, who was an important women organizer for the Northern Elements Progressive Union (NEPU), during Nigeria’s first Republic. She was one of the early members of NEPU in Zaria, a party that identified with the poor and working class, and became their major support base. Sawaba is also known for some of her charitable causes and strong views on women’s liberation in the arena of politics. Her political activities during the period earned her persecutions from both the colonial authorities and the native administration and many times, these resulted in her being incarcerated. Her biography included notes on several instances of beatings and assaults attributed to the NPC’s Yan Mahaukita. She was born in Zaria, Kaduna state, to parents Fatima and Isa Amarteifo (a Ghanaian). Her birth name was Hajaratu Amarteifo but she was born after a set of twins and so was nicknamed Gambo; the nickname stuck. A name that was supposedly given to her by Malam Gambo Sawaba, an outstanding member of NEPU in Zaria, who was twice elected to the Zaria City Council. Her father was of Ghanaian origin while her mother was from Nupeland.
EARLY LIFE AND EDUCATION
Gambo was married off at age 13 to a World War II veteran, Abubakar Garba Bello, who left and never returned after her first pregnancy. A general hospital was later named after her in Kaduna. As a child, Gambo Sawaba was often described as stubborn and forthright. By her own admission, she often went out looking for fights, although she rationalized the said fights as her way of protecting the weaker people she knew. According to her, “I could not stand by to watch a weak friend or relation being molested.” Whenever she got to the scenes of such fights,she would immediately say, “OK, I have bought the fight from you”, to the weaker person and take over the fight. She also showed a marked affection towards mentally challenged and generally less privileged members of society. She spoke with them, accommodated some and gave the ones she could, money, clothes and food. She attended the Native Authority Primary School in Tudun Wada. However, within a spate of a few years, starting in 1943, she lost her father and then her mother. She cut short her education.
POLITICAL CAREER AND ARRIVAL AT THE NATIONAL SCENE
Hajia Gambo Sawaba entered politics when she was 17. At that time, northern Nigeria was dominated by the Northern People’s Congress (NPC), which had the support of the Emirs and British Colonial Authority. Hajia Gambo Sawaba belonged to opposition group, the Northern Element Progressive Union (NEPU), which she joined in Zaria when a local branch was formed. The party held secretive meetings to hide their activities from the Police.
NEPU’s early message was to relinquish power from the elites and rally round the poor. They were anti-colonialism and anti-corruption. Gambo was made women’s leader at Kaduna’s Sabon Gari branch. At one point, she travelled to Abeokuta to meet female activist – and mother of singer Fela – Funmilayo Ransome-Kuti. Gambo had read about her successful protest against the taxation of Egba women.
A few months later, Gambo made a name for herself when, at a political lecture in Zaria, she climbed on to a podium and spoke out in a room full of male contemporaries who were afraid to open their mouths. She continued to raise her profile by going door-to-door and meeting women who were not allowed to attend political activities because of their gender. She campaigned against the marriage of underage girls and the use of forced labour. She was also a great advocate of Western education in the North. She died of natural causes in October, 2001, aged 71.
LOVE, MARRIAGE AND CHILDREN
Imagine that at 13 years of age, Gambo had been married off (if we can call that marriage), to Abubakar Garba Bello, a World War II veteran. When the teenaged Gambo was pregnant with their first child, Bello suddenly disappeared, never to be heard from again. The child was Bilikisu. A few years later, Gambo got married again to Hamidu Gusau. That marriage was, to call a mountain a mole hill, tempestuous. Husband and wife often had disagreements that degenerated into violent fights (never a good idea), because Gambo could dish up a good fight and apparently, so could Hamidu. The two eventually parted ways and Gambo would try marriage twice more.
HAJIA GAMBO SAWABA’S IMPERISHABLE STRIDES
Gambo was said to have been sent to jail a staggering 16 times in her lifetime – usually on trumped-up charges – and was often brutalised by the Police. In 1953, she organised an inaugural meeting of the women’s wing in Kano city.
In July 1958, during NEPU’s second congress, the women’s wing decided to join up with the Nigerian Women’s Union, which was under the leadership of Ransome-Kuti.
During the second republic, Gambo became a member of the Great Nigeria People’s Party and served as a Deputy Chairman. In the 70s, she was involved in small-scale trading and later worked as a contractor. Hajia Gambo, Nigerians will forever honour and celebrate you.
FUN TIME
The stress is abhorrent and torturous. The fears are enormous. To ease these, we shall henceforth, week after week, share some laughter to kick-start a fresh week. Laughter is the biggest medicine for stress. It is therapeutic. Says Mary Peterbone Poole, “he who laughs, lasts!”.
“This is the first time in the history of English that a question and the answer are exactly the same!!!
Question: Who declared Coronavirus as a pandemic?
Answer: WHO declared Coronavirus as a pandemic.
THOUGHT FOR THE WEEK
“Unity is strength… when there is teamwork and collaboration, wonderful things can be achieved”. (Mattie Stepanek).
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Opinion
PDP Crisis: Illegal Factional Convention is a Direct Assault on Party Constitution and Democracy
Published
5 days agoon
March 29, 2026By
Eric
By Prince Adedipe Dauda Ewenla
The attention of party faithfuls and the general public has been drawn to the desperate and unconstitutional attempt by a faction within the Peoples Democratic Party to foist an illegal National Convention on the party in clear violation of its constitution and established democratic norms.
Let it be stated unequivocally: the Constitution of the PDP is clear, unambiguous, and binding on all members only a duly elected National Working Committee (NWC) has the constitutional authority to convene, approve, and conduct a National Convention.
This position is firmly grounded in the provisions of the PDP Constitution:
1. Section 31(3) clearly vests the power to summon and convene the National Convention in the appropriate constitutional organ of the party, which operates through the National Working Committee.
2. Section 29(2)(a) establishes the National Working Committee as the principal executive organ responsible for the day-to-day administration and decision-making of the party.
3. Section 47(1) affirms the supremacy of the party constitution, making it binding on all members and organs of the party without exception.
Flowing from these provisions, any gathering, meeting, or assembly convened outside this constitutional framework is illegal, null, void, and of no consequence, being ultra vires, null ab initio, and incapable of conferring any legal rights or obligations whatsoever.
The ongoing attempt by a faction reportedly aligned with the Minister of the Federal Capital Territory, Nyesom Wike, to organize a so-called convention through an imposed and illegitimate caretaker structure is nothing but a brazen assault on the rule of law, party supremacy, and internal democracy, and amounts to a clear case of constitutional subversion.
For the avoidance of doubt:
Individuals who have been suspended or expelled from the party lack the locus standi to act on its behalf.
Any caretaker arrangement not constitutionally backed by the elected organs of the party remains a nullity ab initio.
No faction, no matter how powerful, can override the supremacy of the party constitution.
Any purported action taken in furtherance of this illegality is void and liable to be set aside ex debito justitiae by any court of competent jurisdiction.
It is instructive that the Federal High Court and other competent courts have already taken judicial notice of these constitutional breaches by entertaining suits challenging the legality of the proposed convention. This alone is a clear warning that the entire process is fundamentally defective and cannot stand the test of law.
We therefore align firmly and unequivocally with the leadership direction and stabilizing efforts under Kabiru Turaki, whose commitment to constitutional order, due process, and party unity remains the only credible path forward for the PDP at this critical time.
The party cannot and must not be hijacked by individuals driven by personal ambition, vendetta politics, or external influence.
The survival of the PDP as a viable opposition platform depends on strict adherence to its constitution and respect for its legitimate structures.
We warn, in the strongest possible terms, that:
Any convention conducted outside the authority of a duly elected NWC will be resisted and rejected by loyal members of the party.
Any outcome from such an illegal exercise will be treated as void ab initio and will not be recognized within the party or before the Independent National Electoral Commission.
Those promoting this illegality are inviting avoidable chaos, multiplicity of suits, and grave political consequences for the PDP ahead of 2027.
This is not just about a convention this is about the soul, legality, and future of our great party.
I call on all genuine stakeholders to rise above factional manipulation and defend the constitution of the PDP with courage and clarity.
The rule of law must prevail. Fiat justitia ruat caelum. The constitution must stand. The PDP must not fall.
Prince Amb. (Dr.) Adedipe Dauda Ewenla
PDP Southwest Ex-Officio
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Opinion
Intentional Progressive Leadership and Disciplined Security: Catalysts for Unlocking Possibilities
Published
6 days agoon
March 28, 2026By
Eric
By Tolulope Adegoke PhD
In an increasingly interconnected and volatile world, the twin forces of intentional progressive leadership and disciplined security stand as indispensable drivers of meaningful advancement. Intentional progressive leadership is characterized by deliberate, forward-thinking decision-making that prioritizes inclusive growth, innovation, accountability, and long-term societal transformation over short-term gains or entrenched interests. Disciplined security, in turn, refers to a professional, rule-of-law-based, human-centered approach to safeguarding citizens, institutions, and resources—one that integrates military, intelligence, law enforcement, and community engagement while upholding human rights and fostering trust. Together, these elements do not merely maintain stability; they actively unlock possibilities across three interconnected spheres: peoples (individuals and communities), corporates (businesses and organizations), and nation building (state institutions and societal cohesion).
This write-up examines their active roles, portrays the current realities as they stand in Nigeria, Africa, and the wider world, provides relevant global and regional examples, and offers practical, unbiased solutions. Drawing on established patterns of development, the analysis underscores that where these forces converge effectively, they generate exponential outcomes; where they falter, stagnation and fragility ensue. The goal is to present a balanced, evidence-informed perspective suitable for policymakers, business leaders, scholars, and development practitioners internationally.
Defining and Contextualizing the Core Elements
Intentional progressive leadership goes beyond charisma or authority. It demands strategic vision anchored in data, ethical governance, stakeholder inclusion, and adaptive resilience. Leaders in this mold invest in human capital, promote transparency, and align policies with sustainable development goals. Disciplined security complements this by creating the enabling environment of safety and predictability. It emphasizes professional training, intelligence-led operations, community policing, and the rule of law rather than militarization or repression. When these operate in synergy, they transform potential into tangible progress: educated citizens innovate, businesses thrive without fear, and nations build resilient institutions.
Active Roles in Delivering Possibilities for Peoples
For individuals and communities, intentional progressive leadership and disciplined security create pathways to dignity, opportunity, and empowerment. Progressive leaders prioritize education, healthcare, and skills development, viewing people as the primary asset. Disciplined security ensures freedom from fear, enabling daily pursuits of livelihood and aspiration.
In practice, this synergy fosters social mobility and cohesion. Progressive leadership invests in youth programs and vocational training, while disciplined security protects learning environments and public spaces. The result is reduced vulnerability to exploitation and increased civic participation.
Active Roles in Delivering Possibilities for Corporates
Corporations require stable operating environments to invest, innovate, and expand. Intentional progressive leadership enacts policies that ease business registration, combat corruption, and promote public-private partnerships. Disciplined security safeguards supply chains, intellectual property, and personnel against threats like extortion or sabotage.
This combination drives economic dynamism. Businesses flourish when leaders provide predictable regulations and when security forces respond swiftly to disruptions, allowing corporates to focus on value creation rather than risk mitigation.
Active Roles in Delivering Possibilities for Nation Building
At the national level, these elements are foundational to sovereignty, legitimacy, and prosperity. Progressive leadership builds inclusive institutions, diversifies economies, and integrates regional and global partnerships. Disciplined security preserves territorial integrity, deters external interference, and supports internal harmony.
Nation building succeeds when leadership fosters national identity and security architecture reinforces it through equitable protection and justice.
The Current Picture: Realities in Nigeria, Africa, and the Wider World
Nigeria exemplifies both promise and persistent hurdles. As Africa’s most populous nation and largest economy, it possesses immense human and natural potential. Yet, as of early 2026, security challenges remain acute: insurgency and banditry in the Northeast and Northwest, farmer-herder conflicts in the Middle Belt, kidnapping for ransom nationwide, and separatist tensions in the Southeast. These have displaced millions, stifled agriculture and commerce, and eroded public trust. Leadership under President Bola Tinubu has pursued reforms, including kinetic and non-kinetic counter-insurgency measures, the appointment of a new Chief of Defence Staff in late 2025 for better operational coherence, and emphasis on human capital development (HCD 2.0). Progress includes reported surrenders of insurgent affiliates and targeted infrastructure investments, yet gaps persist in governance coordination, community engagement, and addressing root causes such as poverty and youth unemployment.
Across Africa, the landscape is heterogeneous. Positive models include Rwanda, where post-genocide leadership under President Paul Kagame has combined visionary governance with disciplined security to achieve sustained growth, digital innovation, and regional stability. Botswana stands as another exemplar: decades of prudent, transparent leadership have turned diamond revenues into broad-based development while maintaining professional security institutions that uphold democratic norms. Ghana demonstrates democratic continuity with progressive economic policies and relatively effective security cooperation. Conversely, parts of the Sahel face coups, jihadist expansion, and governance fragility, highlighting how leadership vacuums and undisciplined security exacerbate cycles of instability.
Globally, the interplay is evident in success stories such as Singapore’s transformation under Lee Kuan Yew, where meritocratic leadership and disciplined, corruption-free security institutions propelled a resource-poor city-state into a high-income economy. South Korea’s post-war reconstruction similarly blended visionary leadership with security alliances and human capital focus. In contrast, nations experiencing leadership complacency or fragmented security—such as certain conflict zones in the Middle East or Latin America—illustrate stalled development and eroded possibilities.
These realities reveal a clear pattern: intentional progressive leadership and disciplined security are not luxuries but necessities. Their absence perpetuates underdevelopment; their presence catalyzes breakthroughs.
Relevant Examples Illustrating Essence and Impact
- Rwanda: Post-1994 genocide, intentional leadership focused on reconciliation, education, and technology hubs, supported by disciplined security reforms that prioritized professional training and community policing. This has elevated Rwanda to one of Africa’s fastest-growing economies, attracting foreign investment and reducing poverty dramatically.
- Botswana: Progressive leadership emphasized accountable resource management and anti-corruption measures, paired with a professional military and police force. The outcome is one of Africa’s most stable democracies and highest Human Development Indices.
- Singapore: Lee Kuan Yew’s intentional policies built a merit-based civil service and rigorous, rule-based security apparatus. This created a safe, efficient environment that transformed the nation into a global financial and logistics hub.
- Nigeria-specific: Initiatives like community-based security arrangements in some states, when aligned with progressive local leadership, have reduced localized banditry. Corporate examples include Lagos tech ecosystems thriving amid targeted security enhancements in business districts.
These cases justify the essence: deliberate leadership and disciplined security deliver measurable possibilities when integrated holistically.
Proffering Relevant Solutions: Pathways Forward Without Prejudice
Solutions must be context-specific yet universally applicable, emphasizing collaboration across stakeholders.
For Peoples (Individuals and Communities):
- Nigeria and Africa: Scale up human capital programs like Nigeria’s HCD 2.0 through universal basic education, vocational training, and digital literacy, especially in rural and conflict-affected areas. Integrate community policing models that empower local vigilantes under professional oversight to build trust.
- Wider World: Adopt inclusive social safety nets and mental health support in post-conflict settings. International partners can provide technical assistance for youth entrepreneurship funds.
- Outcome: Reduced vulnerability and empowered citizens who contribute actively to development.
For Corporates:
- Nigeria and Africa: Enact progressive policies such as streamlined business regulations, tax incentives for security technology investments, and public-private security partnerships (e.g., joint task forces for critical infrastructure). Encourage corporate social responsibility in community safety initiatives.
- Wider World: Promote global standards like ISO security management systems and cross-border investment guarantees tied to stability metrics.
- Outcome: Enhanced investor confidence, job creation, and innovation ecosystems.
For Nation Building:
- Nigeria: Strengthen institutional reforms, including anti-corruption enforcement, judicial independence, and devolved security responsibilities (e.g., state police with federal safeguards). Foster inclusive national dialogues and leverage technology for intelligence sharing.
- Africa: Enhance African Union mechanisms for peer review, joint peacekeeping, and economic integration to address transnational threats.
- Wider World: Support multilateral frameworks that reward progressive governance with development aid and security cooperation, emphasizing capacity-building over external imposition.
- Cross-cutting Measures: Invest in data-driven monitoring (e.g., peace indices), leadership training academies, and civil society engagement to ensure accountability.
Implementation requires political will, sustained funding, and adaptive evaluation. International standards—such as those from the World Bank’s governance indicators or the Institute for Economics and Peace—can guide benchmarking without external overreach.
Conclusion: A Call to Deliberate Action
Intentional progressive leadership and disciplined security are not abstract ideals but active agents that shape destinies. In Nigeria and across Africa, where challenges are pronounced yet potential is vast, their effective deployment can convert vulnerabilities into strengths. Globally, they offer proven blueprints for resilient, prosperous societies. The current picture, while marked by setbacks, also reveals pathways of hope through ongoing reforms and exemplary models. By embracing these forces with intentionality, stakeholders at all levels can deliver genuine possibilities—empowered peoples, thriving corporates, and cohesive nations. The imperative is clear: invest in people-centered leadership and professional security today to secure a more equitable and stable tomorrow. Through collaborative, evidence-based strategies, Nigeria, Africa, and the wider world can realize their full potential in an interdependent global order.
Dr. Tolulope A. Adegoke, AMBP-UN is a globally recognized scholar-practitioner and thought leader at the nexus of security, governance, and strategic leadership. His mission is dedicated to advancing ethical governance, strategic human capital development, and resilient nation-building, and global peace. He can be reached via: tolulopeadegoke01@gmail.com, globalstageimpacts@gmail.com
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Opinion
Characterisation of Biomass Feedstocks Relaxation Properties Using Visco Elastic Models
Published
6 days agoon
March 28, 2026By
Eric
By Dr. Aminu Owonikoko, PhD
Overview
This thesis investigates a deceptively simple but industrially important question: what happens to biomass materials when they are compressed and then allowed to relax? Biomass — such as woodchips, wheat straw, leafy residues, cotton seeds, and wood pellets — is a major renewable resource used for energy production and sustainable manufacturing. However, its physical behaviour during handling, storage, and processing is poorly understood. Unlike uniform materials such as sand or grain, biomass is irregular, springy, and unpredictable. This unpredictability leads to blockages, equipment failures, and inefficient energy use in biomass processing plants.
The research provides a scientific foundation for predicting how biomass behaves under pressure by combining controlled experiments with Visco elastic modelling. The work introduces a new method for extracting key model parameters, enabling more accurate and transparent predictions of biomass relaxation behaviour.
Why Biomass Behaviour Matters
Biomass supply chains involve several mechanical steps: compaction, transport, storage, and feeding into processing equipment. During these steps, biomass is often compressed. Once the pressure is removed, the material “relaxes” — it expands, shifts, and redistributes internal stresses. This relaxation affects:
• how much biomass can be stored
• how reliably it flows through hoppers and conveyors
• how much energy is required to process it
• the likelihood of blockages or equipment downtime
Understanding this behaviour is essential for designing efficient, reliable, and cost effective biomass systems.
Research Aim
The central aim of the thesis is to characterise the stress relaxation behaviour of five biomass feedstocks and to develop robust Visco elastic models that can predict this behaviour under different loading conditions.
Experimental Approach
Five biomass materials were selected due to their relevance in renewable energy and agricultural supply chains:
• Fuzzy cotton seeds
• Leafy biomass
• Wheat straw
• Woodchips
• Wood pellets
Each material was compressed using a Shimadzu MTS testing machine. After reaching a target stress level, the load was held constant while the material’s stress decay was recorded over time (typically 60, 120, and 180 seconds). These measurements captured both fast relaxation (immediate stress drop) and slow relaxation (longer term settling).
The experimental data revealed that each biomass type behaves differently, reflecting differences in structure, moisture content, particle shape, and internal bonding.
Modelling Approach
To interpret the experimental results, the thesis applies Visco elastic models — mathematical tools traditionally used to describe materials that behave partly like solids and partly like fluids. Two models were central:
1. Zener Model
– Captures both elastic and viscous behaviour
– Useful for materials with a clear fast relaxation component
2. Two Maxwell Elements Model
– Represents two relaxation processes simultaneously
– Ideal for materials with both fast and slow relaxation phases
A key contribution of the thesis is the development of a numerical and graphical method for estimating model parameters (such as relaxation time constants) without relying heavily on curve fitting software like MATLAB or OriginPro. This method improves transparency, reduces error, and makes the modelling approach more accessible to engineers.
Key Findings
1. Biomass Has Distinct Relaxation “Signatures”
Each biomass type exhibits a unique pattern of stress decay. For example:
• Wood pellets relax quickly and predictably.
• Leafy biomass relaxes slowly and irregularly.
• Wheat straw shows intermediate behaviour.
These signatures can be used to classify materials and predict their handling performance.
2. Fast and Slow Relaxation Are Mechanically Meaningful
The two Maxwell elements model successfully separates fast and slow relaxation processes. This distinction helps engineers understand how biomass responds immediately after compression versus how it settles over time.
3. New Parameter Extraction Method Improves Accuracy
The thesis introduces a novel approach for estimating relaxation time constants and stress components. This reduces dependence on automated curve fitting tools and provides more reliable model predictions.
4. Models Predict Real Behaviour Well
When applied to experimental data, both the Zener and two Maxwell models accurately reproduce the relaxation curves. This confirms that Visco elastic modelling is a powerful tool for biomass characterisation.
Practical Implications
The findings have direct relevance for industries that handle biomass:
• Improved equipment design: Better predictions of relaxation behaviour reduce blockages and mechanical failures.
• Optimised storage: Understanding how biomass settles helps determine safe and efficient storage densities.
• Reduced energy use: More predictable flow reduces the energy required for conveying and processing.
• Enhanced process reliability: Plants can operate more consistently with fewer interruptions.
Conclusion
This thesis provides a comprehensive experimental and theoretical framework for understanding biomass relaxation behaviour. By combining detailed measurements with improved Visco elastic modelling, it offers new insights into how biomass responds under pressure — insights that are essential for scaling up renewable energy and sustainable manufacturing.
The work advances both scientific understanding and practical engineering, contributing to the development of cleaner, more efficient biomass systems.
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