Features
Can castor bean,rubber and tea seeds solve Sri Lanka’s diesel deficit?
by Chandre Dharmawardana
chandre.dharma@yahoo.ca
According to the “Dilbert Principle“, we rarely recognise our own idiocies, yet we can clearly identify the idiocies of others. Everyone from the Aragalaya man to the “Aemathi Thumaa” has faulted others for the current crisis. And yet, although ordinary citizens can act to resolve the crisis, a culture of confrontation, nurtured by revolutionary ideologies, coupled with unrealistic demands for various “rights” or the resuscitation of ancient myths, has become second nature to Sri Lankans. The government has ground to a halt, and action via citizen groups is essential to deal with the crisis in food and fuel.
In my article in The Island commenting on Mr. Dhammika Perera’s plan to race forex (The Island 13-June-2022), I briefly stated that “Castor is a fast-growing ‘weed’ that is not attacked by pests or livestock. It can be grown among coconut trees or on infertile lands. Its seeds yield a clear oil, directly usable in most diesel engines”. I received many queries on how diesel fuel may be replaced by cheap local oils.
Diesel fuel and electricity are the main energy sources, more important than petrol, that drive the modern world. Wealthy countries produce diesel and maintain reserve stocks as a part of their national security. However, small countries are abjectly dependent on powerful countries that wage war for fossil fuels and control them.
Rudolf Diesel was a 19th century scientist-inventor, influenced by Sadi Carnot’s work in France, that led to the second law of thermodynamics. Diesel was strongly social conscious and moved to help small entrepreneurs, trampled down by wealthy conglomerates who alone controlled the giant steam engines of industry, trains and ships of the late 19th century. In 1892-1895 Diesel patented a compression-ignition engine that ran entirely on vegetable oil, ideally suited for small-farm applications using farm-produced oil. Dashing Diesel’s socialist objectives, his engine became a tool of the Western industrial and military enterprise. By the 1920s, the inexpensive distillate from petroleum crude became the main fuel for Diesel engines, replacing vegetable oil. It is this distillate that is today called “diesel fuel”.
Today, people express surprise that diesel engines may use vegetable oils, since modern engines have been adapted for the distillate from petroleum crude. We describe below how vegetable oils can be used to overcome the fuel crisis, with little or no modification of the engines.
Although coconut oil, peanut oil, etc., can be used, they are very expensive, compared to non-edible waste cooking oil, waste animal fats, castor oil, rubber or tea seed oil, or oils from Madhuka (Sinhalese mee thel) and Neem. Biodiesel is a chemically modified form of vegetable oil, compatible with diesel engines. Our interest is in directly using vegetable oils WITHOUT converting them to standard biodiesel by chemical processing. However, in the following we discus both bio-diesel and use of untransformed vegetable oils.
The 2020 world market prices of natural gas, gasoline, diesel and bio-diesel were US$ 2.18, 2.18, 2.4, and 3.33 per gallon respectively. The current prices change rapidly, but the international price of bio-diesel is irrelevant when the fuel is made locally, without forex. Untransformed vegetable oils, produced in the farm, is an unbeatable option when used for running farm machinery and generating electricity.
Lankan scientists and engineers have argued, even before independence, that unlike many countries, Sri Lanka has unique attributes to achieve self-sufficiency in food and energy, due to its rainfall, reservoirs and biodiversity. In the 1970s some of us had undertaken a study of what was then called “alternative technologies”, and the concepts evolved were presented in a BBC movie. That, too, was a time of food and forex shortages under the Sirimavo government. Today, Sri Lanka is in more dire straits. Hence a return to basic “alternative technologies” achievable within the naturally available resources of the country, is needed, irrespective of the availability of more loans and moans from the IMF.
Direct use of vegetable oils as diesel fuel.
Oil from castor seed (up to 3 tonnes/ha of which nearly 50% is oil) is a good fit to meet Sri Lanka’s urgent needs. It grows easily and rapidly on infertile soil, with few pests or enemies. Similarly, rubber seed (up to 2 tonnes/ha) and tea seed (3-4 tonnes/ha) are mostly left discarded. The main difficulty in using castor or other vegetable oils in modern diesel engine is their high viscosity. Castor oil is some 75 times more viscous than diesel fuel at 400C. Tea-seed oil and rubber-seed oil are better, being only 9-12 times more viscous. We found in our experiments that castor oil, at suitably high temperatures, achieved a viscosity matching diesel.
However, the use of elevated temperatures (above the boiling point of water) raises serious safety and insurance issues, and the method is more suited for stationary diesel engines. Stationary engines can generate electricity and charge batteries that power electric cars and farm equipment. The viscosity of the oils from rubber and tea seed, depending on quality, may be lowered to the viscosity of diesel fuel at easily accessible temperatures. Thus, the hot coolant water (radiator fluid) of the diesel engine could be re-circulated to heat the rubber-seed oil for direct use in a diesel engine. However, more research is needed to implement the hot-fluid system for which only preliminary studies are available.
A simple approach for the direct use of vegetable oils in diesel engines is to dilute the vegetable oil with compatible solvents, like ethyl acetate, that can be produced locally using alcohol and acetic acid, both being products of fermentation of biomass. Considerable work has been done in Brazil and Spain in developing such approaches, using dissolved-vegetable oils.

Indirect use of vegetable oils by converting to biodiesel by trans-esterification.
The commercialized method for using vegetable oils is to convert them to bio-diesel using “esterification”. Here the vegetable oil is treated with a substance, like sodium hydroxide and methyl alcohol (wood alcohol) or ethyl alcohol (spirits of wine), when a layer of glycerol settles to the bottom, and a lighter liquid separates to the top. The top layer is the desired “bio-diesel”. This “trans-esterification” process is highly optimized in industrial production to get optimal yields and reduced costs. However, do-it-yourself conversions of waste cooking oil to bio-diesel is a win-win situation in providing the otherwise unavailable diesel fuel to forex-poor consumers.
A “recipe” for converting castor oil or waste cooking oil (e.g., from cooking oils, like sunflower oil) can be developed using known chemical data for the fatty acids in these oils. We illustrate the method for one litre of waste cooking, giving the rough amounts of ingredients needed, noting that trial and error adjustments are needed for different waste oils.
1. One litre of moisture-free waste cooking oil, filtered to remove frying residues.
2. 3.5-4.0 g sodium hydroxide (not more than 0.1 moles). This is a corrosive substance that should be kept dry.
3. 200 ml (about 4.5 moles) of dry methyl alcohol (wood alcohol) or ethyl alcohol (~ 4.5 moles).
4. Blend (at low speed) the methyl alcohol and the sodium hydroxide until completely dissolution, to be used immediately as it absorbs moisture from the air.
5. Add the filtered cooking oil and blend at low speed for about 1/2 hour. Reaction is facilitated if the blending vessel is kept warm.
6. Let stand until the liquid separates into two layers.
7. The top layer is the bio-diesel, and the bottom layer (glycerol) is drained out.
This is a simple procedure that a cooperative of restaurants or households in a neighbourhood can use to convert their waste cooking oil into diesel fuel. This oil can also be used to fuel an oil-burning cooker or stove instead of using LNG, soot-generating charcoal or wood for cooking.
The biodiesel can be used directly (or mixed with petroleum diesel) as fuel in a standard diesel engine. If the untreated vegetable oil were used (either by using the heated oil, in an engine equipped to heat the input oil held in an auxiliary fuel tank, or by blending with a solvent like ethyl acetate), then (a) the expense for sodium hydroxide and methyl alcohol can be avoided, (b) even the glycerol gets used as a fuel and so the full energy content of the vegetable oil is used in the diesel engine. Otherwise almost half the energy content is lost as waste glycerol. Furthermore, since glycerol is an oxygen-rich chemical, it promotes a cleaner burn in the engine; the exhaust gases contain less soot and less noxious oxides.
Undoubtedly, many owners of high-end diesel cars will hesitate to use artisanal bio-fuels in their cars unless rigorous quality controls are imposed. Private companies, estates, and small entrepreneurs should lead in producing and using bio-diesel or vegetable oils, in diesel engines, without waiting for government action.
Features
Partnering India without dependence
Indian Prime Minister Narendra Modi once again signaled the priority India places on Sri Lanka by swiftly dispatching a shipload of petrol following a telephone conversation with President Anura Kumara Dissanayake. The Indian Prime Minister’s gesture came at a cost to India, where there have been periodic supply constraints and regional imbalances in fuel distribution, even if not a countrywide shortage. Under Prime Minister Modi, India has demonstrated to Sri Lanka an abundance of goodwill, whether it be the USD 4 billion it extended in assistance to Sri Lanka when it faced international bankruptcy in 2022 or its support in the aftermath of the Ditwah cyclone disaster that affected large parts of the country four months ago. India’s assistance in 2022 was widely acknowledged as critical in stabilising Sri Lanka at a moment of acute crisis.
This record of assistance suggests that India sees Sri Lanka not merely as a neighbour but as a partner whose stability is in its own interest. In contrast to Sri Lanka’s roughly USD 90 billion economy, India’s USD 4,500 billion economy, growing at over 6 percent, underlines the vast asymmetry in economic scale and the importance of Sri Lanka engaging India. A study by the Germany-based Kiel Institute for the World Economy identifies Sri Lanka as the second most vulnerable country in the world to severe food price surges due to its heavy reliance on imported energy and fertilisers. Income per capita remains around the 2018 level after the economic collapse of 2022. The poverty level has risen sharply and includes a quarter of the population. These indicators underline the urgency of sustained economic recovery and the importance of external partnerships, including with India.
It is, however, important for Sri Lanka not to abdicate its own responsibilities for improving the lives of its people or become dependent and take this Indian assistance for granted. A long unresolved issue that Sri Lanka has been content to leave the burden to India concerns the approximately 90,000 Sri Lankan refugees who continue to live in India, many of them for over three decades. Only recently has a government leader, Minister Bimal Rathnayake, publicly acknowledged their existence and called on them to return. This is a reminder that even as Sri Lanka receives support, it must also take ownership of its own unfinished responsibilities.
Missing Investment
A missing factor in Sri Lanka’s economic development has long been the paucity of foreign investment. In the past this was due to political instability caused by internal conflict, weaknesses in the rule of law, and high levels of corruption. There are now significant improvements in this regard. There is now a window to attract investment from development partners, including India. In his discussions with President Dissanayake, Prime Minister Modi is reported to have referred to the British era oil storage tanks in Trincomalee. These were originally constructed to service the British naval fleet in the Indian Ocean. In 1987, under the Indo Lanka Peace Accord, Sri Lanka agreed to develop these tanks in partnership with India. A further agreement was signed in 2022 involving the Ceylon Petroleum Corporation and the Lanka Indian Oil Corporation to jointly develop the facility.
However, progress has been slow and the project remains only partially implemented. The value of these oil storage tanks has become clearer in the context of global energy uncertainty and tensions in the Middle East. Energy analysts have pointed out that strategic storage facilities can provide countries with greater resilience in times of supply disruption. The Trincomalee tanks could become a significant strategic asset not only for Sri Lanka but also for regional energy security. However, historical baggage continues to stand in the way of Sri Lanka’s deeper economic linkage with India. Both ancient and modern history shape perceptions on both sides.
The asymmetry in size and power between the two countries is a persistent concern within Sri Lanka. India is a regional power, while Sri Lanka is a small country. This imbalance creates both opportunities for partnership and anxieties about overdependence. The present government too has entered into economic and infrastructure agreements with India, but many of these have yet to move beyond initial stages. This has caused frustration to the Indian government, which sees its efforts to support Sri Lanka’s development as not being sufficiently appreciated or effectively utilised. From India’s perspective, delays and hesitation can appear as a lack of commitment. From Sri Lanka’s perspective, caution is often driven by domestic political sensitivities and concerns about sovereignty.
Power Imbalance
At the same time, global developments offer a cautionary lesson. The behaviour of major powers in the contemporary international system shows that states often act in their own interests, sometimes at the expense of smaller partners. What is being seen in the world today is that past friendships and commitments can be abandoned if a bigger and more powerful country can see an opportunity for itself. The plight of Denmark (Greenland) and Canada (51st state) give disturbing messages. Analysts in the field of International Relations frequently point out that power asymmetries shape outcomes in bilateral relations. As one widely cited observation by Lord Parlmeston, a 19th century prime minister of Great Britain is that “nations have no permanent friends or allies, they only have permanent interests.” While this may be an overly stark formulation, it captures an underlying reality that small states must navigate carefully.
For Sri Lanka, this means maintaining a balance. It needs to clearly acknowledge the partnership that India is offering in the area of economic development, as well as in education, connectivity, and technological advancement. India has extended scholarships, supported digital infrastructure, and promoted cross border links that can contribute to Sri Lanka’s long term growth. These are tangible benefits that should not be undervalued. At the same time, Sri Lanka needs to ensure that it does not become overly dependent on Indian largesse or drift into a position where it functions as an appendage of its much larger neighbour. Economic dependence can translate into political vulnerability if not carefully managed. The appropriate response is not to distance itself from India, but to broaden its partnerships. Engaging with a diverse range of countries and institutions can provide Sri Lanka with greater autonomy and resilience.
A hard headed assessment would recognise that India’s support is both genuine and interest driven. India has a clear stake in ensuring that Sri Lanka remains stable, prosperous, and aligned with its broader regional outlook. Sri Lanka needs to move forward with agreed projects such as the Trincomalee oil tanks, improve implementation capacity, and demonstrate reliability as a partner. This does not preclude it from actively seeking investment and cooperation from other partners in Asia and beyond. The path ahead is therefore one of balanced engagement. Sri Lanka can and should welcome India’s partnership while strengthening its own institutions, fulfilling its domestic responsibilities, and diversifying its external relations. This approach can transform a relationship shaped by asymmetry into one defined by mutual benefit and confidence.
by Jehan Perera
Features
The university student
This Article is formed from listening to university students from across the country for two research initiatives, one on academic freedom and another on higher education policy. In speaking with students, the fears they carry could not be ignored. Students navigate university education, with anxieties about their future and fears that they and their university education are inadequate, all while managing their families’ daily struggles. I explore students’ anxieties and the extent to which we, the public, and higher education policies must take responsibility for their experiences.
The Neoliberal University
For decades, universities have been transforming. Neoliberal policies, promoted by the World Bank, have reduced public education expenditure and weakened the State’s commitment to public institutions. These policies frame individuals as responsible for their success and failure, minimising structural realities, such as poverty and precarity. They instrumentalise education, treat students as “products” for a “competitive’ job market, while education markets feed on students’ insecurities. Students are made to feel lacking in “soft skills”, or skills seemingly necessary to navigate classed-corporate structures, and lacking in technical skills, or those needed to operate technologies used within the private sector.
Student activists and, sometimes teachers, have challenged this worldview, demanding State commitment to free education. Governments sometimes yield but also fear the consequences of student politics and have long waged campaigns to discredit student activism. It is within this context that students pursue education.
Portrayal of students
A Peradeniya student told me student-organised events must meet “high standards”, because of the negative public perceptions of university students. I understood what she meant; I had heard of our ‘ungrateful’, ‘wasteful’, ‘unemployable’, and ‘entitled’ students. The media and decades of government propaganda have reinforced these depictions.
About 10 years ago, when government moves to privatise higher education were strong, a corporate executive, complaining about traffic caused by “yet another useless protest”, was unable to explain why they protested. News coverage, I realised, framed these protests as public inconveniences, rarely addressing students’ demands. A prominent advocate, of neoliberal educational policy, reinforced this narrative, saying “state university students make up just 10 percent of their cohorts”, gesturing dismissively as if to say their concerns were insignificant. Such language belittles student activists and youth, renders them voiceless and allows their concerns, such as classed worldviews, and access barriers to and privatisation of education, to be easily dismissed.
It is in this environment that the conception of the useless university student, fighting for no reason, has developed. Students must carry this misrepresentation, irrespective of their own involvement in activism.
Not being good enough
Attacks on free higher education and the absence of meaningful reforms designed to address students’ problems, now weigh on students’ minds. Students question whether their education is relevant and current, pointing to outdated equipment, software, and curricula. University administrators acknowledge these constraints, which reflect Sri Lanka’s ranking as one of the lowest in the world for the public funding of education and higher education.
Rarely has the World Bank, so influential in driving educational policy, highlighted the public funding crisis and, instead, emphasises technological deficiencies, the public sector’s “monopoly” of higher education and limited private sector involvement. It downplays the reality that few families can privately afford such funding arrangements.
Students are also bombarded with fee-levying programmes, promising skills and access to jobs, preying on students’ insecurities. Many, while struggling to make ends meet, enrol in off-campus pricy professional courses, such as in accountancy, marketing, or English.
The arts student
Some students worry their education is too theoretical and “Arts-focused.” A student from the University of Colombo described having to justify her decision to pursue an arts degree. The public, she said, saw this as a waste of her time and the country’s resources. She courageously wore this identity, yet questioned if she was, in fact, unemployable as she was being led to believe.
She does not, however, draw on the fact that arts education has long been the “cheap” option that governments have offered when pressured to expand higher education. While arts education may need fewer laboratories and equipment, they require adequate investments on teachers, strong on content and pedagogy, to closely engage with individual students; aspects of arts education which have systematically been disregarded.
As access broadens, particularly in the arts, more students from marginalised backgrounds have entered universities; students who may feel alien in systems aligned with corporate interests. Thus, students quite different from the classed conception of the “employable graduate,” whose education has systematically been under-funded, graduate from arts programmes frustrated, diffident, and ill-suited for jobs to which they are expected to aspire.
The dysfunctional university
Students voice criticisms of their teachers, as myopic, unworldly, and unfair. Their perspective reflects the universities’ culture of hierarchy and its intolerance of difference, on the one hand, and the weak institutional structures on the other. They are symptoms of years of neglect and attempts by governments to delegitimise universities, to shed themselves of the burden of funding higher education through anti-public sector rhetoric.
Some students, marginalised for being anti-rag, women, or ethnic minorities, feel an added layer of burdens. Anti-rag students, or more often, students who do not submit to university hierarchies, whether enforced by students or staff, are ostracised, demeaned and sometimes subjected to violence. Students unable to speak the institution’s dominant language face inadequate institutional support. Women describe being ignored and silenced in student union activities and left out of student leadership positions.
Furthermore, quality assurance processes rarely prioritise academic freedom or students’ right to exist as they wish, except when they complement the process of creating a desirable graduate for the job market. These processes focus on moulding professionals and technicians, as one would form clay, disregarding students’ anxieties from being alienated from themselves by such efforts.
Problems at home
Beyond the campus, parents face debt, illness, and precarious work. Students are acutely aware of these struggles. Some describe parents collapsing from the strain and sometimes leaving them to carry the family’s difficulties. A student described feeling guilty for being at the University while his family struggled to survive. To ease the burden on their families, students earn incomes by providing tuition, delivering food, and carrying out microbusinesses.
Tied to their concerns over having to depend on their families, is their fear of being “unemployable”, a term that places the blame of unemployment on students’ skill deficiencies. Little in this discourse connects the lack of decent work and jobs for them and their parents to the weak economy and job markets into which successive batches of graduates must transition. Much of the available jobs in the country are those that require little in the form of education, and those, too do little to provide a living wage. Students must, therefore, compete for a limited number and breadth of frankly not very desirable work. Yet, it is they who must feel the weight of unemployability.
Committing to students
Universities frequently fail to recognise students’ worries. Instead, we, coopt neoliberal discourses, telling students to become more marketable and competitive, do and learn more, be confident, improve English, learn to inhabit those classed spaces with ease; often without the support that should accompany these messages.
We expect these students, insecure and anxious, to think critically, and demonstrate curiosity and higher-order analyses. When they collapse under the pressure, universities respond by providing mental health services. While such services are needed, they risk individualising and pathologising systemic problems. They represent yet again the inherent flaws with solutions that emerge from neoliberal ideological positions that treat individuals as the source of all success and failure. Such perspectives are likely to reinforce students’ anxieties, rather than address them.
As Sri Lanka revisits education policy reforms, there is an opportunity to change our framings of education and to recognise these concerns of students as central to any policy. The state must renew its commitment to free education and move from the neoliberal logic that has guided successive reform efforts; we, as the public, must restore our hope and expectations from free education. Education across disciplines, the arts, as well as STEM (science, technology, engineering and mathematics), must be strengthened. Students’ freedom to inhabit university spaces as they wish, must be respected and protected by institutions. Education policies must be tied to broader economic and labour reforms that ensure families can safely earn a living wage and graduates can access a rich range of decent meaningful work.
(Shamala Kumar teaches at the University of Peradeniya)
Kuppi is a politics and pedagogy happening on the margins of the lecture hall that parodies, subverts, and simultaneously reaffirms social hierarchies.
by Shamala Kumar
Features
On the right track … as a solo artiste
Mihiri Chethana Gunawardena is certainly on the right track, in the music scene.
The plus factor, where Mihiri is concerned, is that she has music deeply rooted in her upbringing, and is now doing her thing in the Maldives.
Her father, Clifton Gunawardena, was a student of the legendary Premasiri Kemadasa and former rhythm guitarist of the Super 7 band.
Mihiri took to music, after her higher studies, and her first performance was with her father, while employed.

Mihiri Chethana Gunawardena
After eight years of balancing both worlds – working and music – she chose to follow her true calling and embraced music as her full-time profession.
Over the years, Mihiri has worked with some of the top bands in the local scene, including D Major, C Plus from Negombo, Heat with Aubrey, Mirage, D Zone Warehouse Project and Freeze.
In fact, she even put together her own band, Faith, in 2017, performing at numerous events, and weddings, before the Covid pandemic paused their journey.
What’s more, her singing career has taken her across borders –performing twice in Dhaka, Bangladesh, with the late Anil Bharathi and the late Roney Leitch, and multiple times in the Maldives, including a special New Year’s Eve performance with D Major.

In the Maldives, on a one-month contract
Last year, Mihiri was in Dubai, along with the group Knights, for the Ananda UAE 2025 dance.
She continues to grow as a solo artiste, now working closely with the renowned Wildfire guitarist Derek Wikramanayake, and performing, as a freelance musician, travelling around the world.
Right now, she is in the Maldives, on a one-month contract, marking a new chapter in her evolution as a solo vocalist.
On her return, she says, she hopes to create fresh cover songs and original music for her fans.
Mihiri believes in spreading joy and positivity through her singing, and peace and happiness for everyone around her, and for the world, through music.
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