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 Can castor bean,rubber and tea seeds solve Sri Lanka’s diesel deficit?

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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.



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Why ‘Southasianness’ should continue to matter for the ‘SAARC Eight’

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Ambassador Ravinatha Aryasinha (at centre of top table), other dignitaries and the RCSS team at the formalization of the SAU-RCSS agreement.

At a time when Sri Lanka’s foreign policy is coming under intense scrutiny by some local sections it is only right that impartial and independent commentators shed some clarity on what fundamental foreign policy directions Sri Lanka ought to take. The extremely fluid and complex nature of current international politics renders such an understanding crucially important.

Given its vulnerabilities in a number of spheres Sri Lanka has no choice but to persist in broadly following the path of Non-alignment. That is, it should be ‘a friend of all and an enemy of none’, to the extent possible. However, it does not follow that in the process it could compromise what is seen as its national interest.

The latter point needs stressing against the backdrop of the criticisms the Sri Lankan government has been attracting from some quarters over what is made out to be some opaqueness in security and defence cooperation agreements it has entered into with India. It remains advisable for the Sri Lankan government to enter into pacts of this nature with India, but the government is obliged to disclose the contents of these agreements to the Sri Lankan people without undue delay in consideration of the uncompromisable sovereign rights of a people in a democracy.

However, there is no denying that the government should make it a central foreign policy premise to always work in cooperation with India. A consideration of what it cost Sri Lanka in the past to be in a disharmonious relationship with India and how such policy missteps worked against Sri Lanka’s best interests ought to dictate to Sri Lanka the advisability of maintaining uninterrupted cordial ties with India. Moreover, common sense ought to drive home to a country the costs of being at loggerheads with one’s closest neighbour who has also proved a ‘ready friend in deed.’

That said, it is the bounden duty of Sri Lanka’s diplomatic community or establishment to ensure that such cooperation does not degenerate into a policy of subservience towards India. That is, finesse and farsightedness in local diplomacy become prime requirements.

While India’s geographical location and physical size, besides her other strengths, contribute towards her centrality in regional and world affairs, her neighbours would be thinking and acting far-sightedly if they not only focus on India and her legitimate interests but also ensure continuous friction-free intra-South Asian relations. That is, for them collective South Asian well being should be of fundamental importance.

Much more than for India perhaps, such harmonious ties are of inestimable importance to India’s neigbours who are up against multiple vulnerabilities which are to a great extent regionally rooted. The latter could never, that is, afford to take their minds off the region’s collective development prospects.

The above are some of the reasons why it could prove highly counter-productive and self-defeating for the ‘South Asian Eight’ to render dormant and ineffective the historic SAARC organization. Rather than ‘dead’ SAARC has been allowed to drift into the ‘Limbo of Forgotten Things.’

The growing inter-dependence of the ‘SAARC Eight’ ought to impress on the collectivity the need to step-up regional cooperation in multiple areas which impinge on its members’ legitimate interests. For instance, the youth-led ‘Cockroach’ revolts, first in India and subsequently outside, should convince South Asia that it is continuing to be plagued in a major way by poverty and equity-linked issues. That is, West-inspired, largely market economics-dictated ways to see an end to poverty are simply not working completely.

Likewise climate-related questions are ravaging South Asia in unimaginable ways; Nepal being just one case in point. The rationale for regional cooperation remains valid and undefeated. It is time for revived and stepped-up SAARC cooperation. That is, the solutions to the region’s development dilemmas need to be found in mainly the region.

This amounts to making a case for a continued sense of ‘Southasianness’ among the SAARC countries. That is the conviction should be firm that they know their developmental challenges best and that answers to these issues must be primarily evolved by the grouping itself in cooperation with concerned sections.

From the above viewpoints the Regional Centre for Strategic Studies (RCSS), Colombo did very well to tie-up with the South Asian University (SAU), India, to increase public awareness on the developmental problems affecting South Asia and for initiating a number collaborative measures that aim at ameliorating them. The relevant agreement was formalized in early September at the RCSS. The sealing of the pact took place under the aegis of SAU President Prof. K.K. Aggarwal and RCSS Executive Director Ambassador Ravinatha Aryasinha.

A press release issued by the organizations said the collaboration aims ‘to foster research networks, partnerships and collaborations for transformative change across South Asia.’ It also mentioned that the partnership marked the first agreement to be signed by SAU with an independent think tank in Sri Lanka.

Among other things, pacts such as the above are bold moves in the direction of fostering a spirit of intellectual independence in those areas of the South facing some of the stiffest developmental challenges. Rather than ‘import’ solutions to these challenges from outside the region, the SAU-RCSS initiative aims at fostering fresh approaches to evolving solutions to problems that are uniquely South Asian.

It is hoped that the SAU and RCSS initiative while leading a to a greater degree of Southern intellectual independence in the area of development thinking would also help in kick-starting the SAARC process all over again in a major way.

What ought to lend fresh urgency to the latter undertakings are fast-breaking current developments in international politics. It ought to be perceived by the most underdeveloped regions of the South that going forward their well being would matter least or not at all to the major powers of both East and West.

For example at the time of writing the foremost among US and Chinese political leaders are meeting in the US in what is made out to be a historic coming together of sorts to address issues of common concern. It is highly unlikely that the parties would be addressing the economic preoccupations of the least developed countries. The same goes for other states that matter from the East and West.

Essentially, the US and China would be looking at ways of strengthening business ties that matter majorly for them. The South and its issues would prove to be of peripheral interest, if at all they happen to matter to the protagonists. Such developments ought to be fresh reminders to the South and their collaborative organizations that there is no escaping self-help and joint solidarity.

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Is Sri Lanka prepared for global literacy crisis?

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by Prof. M.W. Amarasiri de Silva

Adult literacy has for a long time been one of Sri Lanka’s greatest sources of pride, serving as a social indicator that has set the country apart from several of its neighbours in the region. For many years Sri Lanka has been recognised for keeping its literacy rates at a level like those of middle-income countries and even some high-income ones, even though it has faced economic difficulties and political instability. However, since new global research has now shown an unexpected and concerning decline in adult literacy in several high-income countries, it is important to consider what this means for Sri Lanka.

The phenomenon described by Jishnu Das, Yash Dhuldhoya and Ethan Sager, the unexplained fall in functional literacy among adults in wealthy nations. calls for a more thorough examination of the nature of literacy, the pressures exerted by the modern information environment, and the vulnerabilities that Sri Lanka might encounter as it moves towards a more digital, ageing and complex society. Even though Sri Lanka’s basic literacy rates remain high and steady, the global trend acts as a warning that literacy is not a fixed accomplishment but a dynamic capability which must be continually fostered, safeguarded and adapted to changing circumstances.

Decline in functional literacy

The drop in literacy rate in high-income countries is not due to people losing the ability to read or write in the ordinary way. On the contrary, it reflects a decline in functional literacy, which is the capacity to deal with, understand, and apply information in real-life situations. This kind of literacy involves following instructions, comprehending official documents, using digital interfaces, interpreting medical information, and making sense of complicated texts that demand continuous attention.

Researchers stress that the decline cannot be attributed merely to disruptions caused by COVID-19 or the increasing use of smartphones; instead, there is going on something more fundamental: a weakening of the cognitive and informational bases that adults need to function properly in modern society. In countries such as the United States, the percentage of adults regarded as functionally illiterate has increased significantly, indicating that even highly educated societies are having difficulty in keeping up the skills required to handle ever more complex streams of information.

Sri Lanka immune?

At first sight, Sri Lanka seems to be immune from this trend. The country’s adult literacy rate is still above 92 per cent and youth literacy is even higher. According to the 2024 Census, literacy rates exceed 97 per cent among people aged ten and over, with nearly equal levels between the sexes. These figures show the continued strength of Sri Lanka’s system of free education, a system which in the past has guaranteed widespread access to school and has produced generation after generation of citizens who could read and write at a basic level.

There has also been a steady improvement in educational attainment, with an increasing number of adults finishing secondary education and a larger proportion going on to tertiary institutions. Unlike the mysterious drops observed in rich countries, Sri Lanka’s literacy figures demonstrate stability and even a slight improvement.

However, although the surface appearance is reassuring, an even more complicated reality exists. The literacy figures for Sri Lanka only record basic literacy, that is, the ability to read and write simple sentences, and they do not include measures of functional literacy. It is impossible to tell from these statistics whether adults can interpret a bank statement, understand a medical prescription, use an online government portal, or critically assess information that is spreading on social media. As is shown by the global trend, having a high level of basic literacy does not ensure a strong degree of functional literacy. On the contrary, functional literacy can fall even if basic literacy stays the same. This difference is important for Sri Lanka, particularly since the country is currently experiencing rapid digitalization, demographic ageing, and social change.

Major risk factor

A major risk factor is the move towards digital information environments. In high-income countries, researchers believe that the prevalence of smartphones and short-form digital content may be diminishing people’s ability to engage in deep reading. Nowadays, individuals take in information in short, rapid segments by scrolling through social media feeds, quickly reading headlines, and viewing short videos. Such behaviour decreases the opportunity for sustained reading, which is necessary for keeping comprehension, critical thinking, and the capacity to deal with complex information intact.

Sri Lanka is going through a comparable change. There has been a sharp increase in the number of people using smartphones, and social media sites have become the main sources of news, leisure, and communication. Although there are many advantages to having digital access, it also results in a situation where superficial reading becomes the standard approach and could therefore lead to a decline in functional literacy over time.

Demographic ageing as challenge

A further challenge that is coming up is demographic ageing. Sri Lanka is rapidly moving towards becoming an ageing society, with an increasing number of older people who might experience cognitive decline, have less exposure to new information, and enjoy few opportunities for further learning. In high-income countries, ageing populations have led to a fall in functional literacy since older individuals have had difficulty adapting to digital systems and complicated bureaucratic procedures.

The older generation in Sri Lanka, many whom were educated many decades ago under different curriculum standards, could end up becoming increasingly vulnerable in a world in which essential services, such as banking and healthcare, are being moved online. If appropriate support is not provided, the country may witness a growing gap between basic literacy and functional literacy among older adults.

In Sri Lanka, the way in which administration and the workplace are organised has in the past placed greater trust in personal communication and on basic forms of documentation. What in high-income countries would require complex reading is instead carried out through face-to-face contact in Sri Lanka. Nevertheless, this situation is now changing. Government services are becoming available online, banks are introducing digital systems, and in workplaces there is an increasing need for employees to use electronic systems. Since these changes are happening at a faster rate, the demand for functional literacy will increase. Should adults not be able to meet these new demands, Sri Lanka might start to see the kind of decline in literacy that has been seen in other places.

Misinformation and disinformation

Another worry is the spread of misinformation and disinformation. In Sri Lanka, there has already been the quick dissemination of false information via social media, with this having an impact on public health, politics, and social cohesion. Since functional literacy is essential for allowing people to assess sources, doubt the claims made, and tell the difference between reliable information and falsehoods, a lack of functional literacy causes societies to be more open to manipulation, polarisation, and confusion.

The fact that there has been a global drop in functional literacy at the same time as misinformation has increased points to a dangerous feedback cycle: when literacy is low people become more prone to misinformation, and the misinformation in turn damages their ability to think critically about information. Given that the country has a high level of social media use and a lack of digital literacy training, Sri Lanka should take this risk seriously.

Even though there are these risks, Sri Lanka has several advantages which can assist in avoiding a drop in functional literacy. The country’s system of basic education is still strong, showing high enrolment figures and good results in basic literacy.

Families in Sri Lanka still place a great deal of importance on education and reading is still a respected cultural activity. Furthermore, because of its relatively small size and the fact that it has a centralized form of government, it is more efficient than in bigger countries to carry out nationwide literacy campaigns. These strengths offer a firm basis for developing new strategies for protecting and improving functional literacy.

Literacy a process

It should be realised by Sri Lanka that attaining literacy is not a single accomplishment achieved in childhood. In the modern world, literacy must be a skill that is constantly put into practice, kept up to date and adapted to changing circumstances. The fact that adult literacy is declining worldwide shows that even in wealthy countries with well-developed education systems deterioration can occur if adults are not supported in keeping their cognitive and informational abilities. Sri Lanka cannot afford to be careless.

It is necessary for the country to invest in adult education, in programmes concerning digital literacy and in the development of cognitive skills for all age groups. It also needs to establish ways of measuring functional literacy rather than just basic literacy so that policymakers can detect emerging weaknesses and act in advance.

A vital measure is to increase the opportunities for adult learning. Although Sri Lanka has effective literacy programmes based in schools, the country’s infrastructure for adult education is limited. Community centres, libraries, universities, and vocational institutes should take on a more significant role by providing courses, workshops, and reading programmes which are tailored for adults. The programmes should place an emphasis not just on reading and writing but also on digital navigation, critical thinking, and information processing. Adults should be given the chance to practise the skills that are necessary for them to function effectively in a rapidly changing world.

Importance of digital literacy programmes

It is just as important to have digital literacy programmes. Since an increasing number of services are being offered online, adults need to learn how to use digital tools with confidence and in a safe manner. This involves knowing how to fill out online forms, moving around on government websites, using banking apps, and being able to spot misinformation. The digital literacy courses available should be accessible, affordable, and adapted to different age groups, especially older adults who might feel put off by technology. Schools can also contribute by incorporating digital literacy into their curriculum so that future generations acquire good functional literacy skills from an early age.

Sri Lanka should also investigate introducing policies which promote cognitive health among older people. Since cognitive decline can lead to a deterioration of functional literacy, it becomes more difficult for older individuals to deal with information. It is possible to help keep cognitive function by setting up programmes that promote reading, social interaction, physical activity, and continued learning. During regular medical visits, healthcare professionals should include cognitive assessments so that any problems affecting literacy-related skills can be picked up early.

Sri Lanka needs to create tools for measuring functional literacy, since the figures available on basic literacy give an incomplete account of the country’s capabilities. By using assessments of functional literacy like those employed in high-income countries, Sri Lanka would be able to monitor how well its adults can apply their literacy skills in real-life situations.

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From Colombo to Vegas: Sri Lankan talent shines at WCOPA

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Chris with Sachini Ayendra, the very first contestant who represented Sri Lanka at WCOPA 2015 / Bronze winner at WCOPA 2026 Natharie Wickramasinghe with her parents

The World Championships of Performing Arts (WCOPA) is known globally as the Olympics of performing arts, but Sri Lankans came to know of it more closely when Natharie Wickramasinghe, representing Team Sri Lanka at WCOPA 2026, in Las Vegas, earned a Bronze Medal in the Ethnic/Folklore Dance category.

Behind Sri Lanka’s WCOPA journey is Sri Lanka-born Chris Rajendra, who migrated to the United States in 2007, and deserves special congratulations.

Passionate about discovering and promoting talent, Chris has been actively involved in the pageant and performing arts, industry since 2002.

A major milestone came in 2015, when he introduced WCOPA, to Sri Lanka, for the first time, creating an international platform for Sri Lankan performers.

Sachini Ayendra became the very first candidate to represent Sri Lanka at WCOPA, in 2015, marking the beginning of Team Sri Lanka’s journey.

Chris served as National Director for Team Sri Lanka from 2015 to 2018, and has returned to the role for the 2026–2027 term, continuing his commitment to identifying, developing and promoting Sri Lankan talent internationally.

His involvement in pageantry and performing arts includes:

Recruiter, Miss Nevada United States – 2014

Chris Rajendra: National Director – WCOPA Team  Sri Lanka

Manager, Miss Colombia Las Vegas – 2013 to 2017

Director for the West Coast and International Divisions of Ms. Latina International and Ms. International World – 2017

National Director for Team Sri Lanka – WCOPA, 2015–2018 and 2026–2027

Co-National Director for Team USA – WCOPA 2026

In the USA, Chris began his career in retail before transitioning into insurance and financial services, where he built extensive experience in sales, marketing, leadership and business development.

He owned and operated a brokerage, affiliated with multiple insurance companies, and later served as Marketing Director with Transamerica and World Financial Group.

As his business expanded across Las Vegas and California, he continued to hone his expertise in sales, marketing and client relations. He now works as a Sales Executive at Hilton Grand Vacations.

Looking ahead, Chris will shortly launch the application process for Team Sri Lanka 2027, giving talented Sri Lankan performers another opportunity to represent the country on the world stage.

The 2027 World Championships of Performing Arts will take place in Las Vegas, USA, in July or August 2027.

Through his work in both the corporate and performing arts worlds, Chris Rajendra continues to combine leadership, networking and talent development — creating opportunities for Sri Lankan performers to showcase their abilities on a global platform.

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