Agriculture, Food, Environment, and Sustainability
The Official Research Journal of the Institute of Sustainable Agricultural, Food, and Environmental Sciences
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Publications in 2022
Market Potential for Coconut Leaf Based Straws in Sri Lanka: A Sustainable Alternative to Plastic Straws.
Article by P. M. N. Mihirani, C. M. V. Dharmawardhana, and W. R. W. M. S. N. P. Weerakoon (2022)
Read this article on ResearchGate
Market Potential for Coconut Leaf Based Straws in Sri Lanka: A Sustainable Alternative to Plastic Straws
P. M. N. Mihirani1, C. M. V. Dharmawardhana2 and W. R. W. M. S. N. P. Weerakoon2
1Institute of Sustainable Agricultural, Food, and Environmental Sciences, Sri Lanka.
1Ceynergy Dynamic Holdings, Sri Lanka.
2Department of Agriculture, Sri Lanka.
Abstract
Abstract
Coconut leaf based straws represent a novel and environmentally sustainable alternative to conventional plastic and paper straws. As global concerns about plastic pollution and single use plastics intensify, demand for biodegradable and compostable alternatives has grown rapidly. Coconut leaf straws are crafted from natural coconut palm leaves and offer a fully biodegradable option that decomposes naturally without contributing to microplastic pollution. This review examines the prospects of introducing and scaling coconut leaf straws in Sri Lanka by analysing market factors, production processes, costs, advantages, environmental implications, consumer preferences, barriers to adoption, and lessons from existing products in other countries. Drawing on product descriptions, market listings, and technical discussions of plant based alternatives, the paper situates coconut leaf straws within broader trends of waste reduction, climate responsive product innovation, and circular economy thinking. The analysis concludes that coconut leaf straws hold significant potential as both a domestic product and an export oriented solution, provided that Sri Lankan producers can address issues related to supply chain coordination, performance consistency, consumer awareness, and pricing relative to competing biodegradable alternatives.
1. Introduction
The ubiquitous drinking straw, defined simply as a tubular utensil used to convey liquids by suction, has become emblematic of the environmental problems associated with single use plastics. Traditional plastic straws are lightweight and disposable, but they can take hundreds of years to break down and contribute to land and marine pollution through microplastic generation. In response, a diverse array of alternative straw materials has emerged, including reusable metal and glass straws, biodegradable paper and compostable plant based options such as bamboo and wheat based straws, as well as more recent innovations crafted from agricultural residues and fibers. Coconut leaf based straws, created from the dried leaves of the coconut palm, are among these alternatives and have gained attention in parts of Asia and Europe for their natural biodegradability, minimal processing requirements, and potential to repurpose agricultural waste. This review examines the market potential for coconut leaf based straws in Sri Lanka, situating the discussion within global trends of sustainable product adoption and plastic waste regulation.
2. Context: Plastic Straw Pollution and Alternative Materials
Plastic straws, historically introduced as single use convenience items, are a major contributor to global plastic pollution. Widespread public awareness campaigns and regulatory bans on single use plastics have stimulated growth in reusable and biodegradable straw alternatives ranging from metal, silicone, glass, bamboo, and plant based materials. Plant based materials such as paper, wheat, starch derived bioplastics, and leaf based products are designed to minimize environmental impact by decomposing naturally within a short period under composting conditions. Reviews published in environmental sustainability literature report that biodegradable straws made from natural materials are significantly more environmentally friendly than petroleum based single use plastic straws because they reduce landfill accumulation, require fewer manufacturing resources, and avoid contributing to microplastic pollution in oceans and soils. Coconut leaf straws in particular are among a class of biodegradable alternatives that offer structural integrity for several hours of drinking use while ultimately decomposing into harmless organic matter.
3. Raw Material Availability in Sri Lanka
Sri Lanka is one of the world’s largest coconut producing countries with an extensive coconut industry that spans rural regions. Coconut leaves are a byproduct of the coconut palm lifecycle, generated in large quantities during pruning and after coconut harvests. These leaves are traditionally considered agricultural waste, often left to decompose or burned, which can contribute to air pollution and inefficient resource utilization. Utilizing fallen or harvested coconut leaves as a raw material for biodegradable straw production aligns with circular economy principles by converting underutilised plant biomass into value added products. The abundance of coconut leaves throughout Sri Lanka suggests that raw material supply constraints would be limited for local companies seeking to develop coconut leaf straw production systems.
4. Production Process and Technical Feasibility
Coconut leaf straws are manufactured by selecting and preparing dried coconut palm leaves, cleaning them to remove dirt and debris, and then cutting, rolling, and binding the leaf segments into straw like tubular forms. Some producers use specific natural properties of coconut leaf such as its epicuticular wax layer, which provides inherent moisture resistance, meaning that the resulting straws can remain intact in liquids for extended periods without becoming soggy very quickly. Empirical studies of natural cellulose rich leaf materials indicate that manufacturing biodegradable straws requires minimal chemical processing compared to paper or bioplastic alternatives, and the coconut leaf straws are often bound with food safe biodegradable adhesives or natural binding techniques. Examples from India demonstrate that dedicated innovations in coconut leaf straw production have employed both manual and mechanised processing that preserves structural integrity and consumer usability while ensuring compostability after disposal.
5. Product Characteristics and Performance
Coconut leaf based straws possess characteristics desirable in biodegradable straw alternatives. They are naturally biodegradable and compostable, decomposing within months rather than decades, and do not leave microplastics in the environment. Marketed products highlight that coconut leaf straws are tasteless and odourless, preserving the flavour experience of beverages without altering taste, and can be used with both hot and cold drinks. Compostable coconut leaf straws offer durability significantly beyond that of paper straws and can remain usable for hours in liquid without losing structural integrity, which appeals to consumers and businesses seeking performance reliability alongside sustainability credentials. The unique natural appearance of leaf based straws also adds an aesthetic quality that can be positioned as a design element in eco friendly cafes, bars, and restaurants.
6. Market Factors and Consumer Trends
Consumer demand for sustainable and plastic free products has been growing in many regions, including Sri Lanka, driven by heightened environmental consciousness, regulatory shifts away from single use plastics, and broader lifestyle trends favouring natural and biodegradable goods. The global market for sustainable alternatives to plastic straws is estimated to be significant, encompassing multiple natural materials, with coconut leaf straws emerging as a promising segment within biodegradable straw offerings. Consumers increasingly prioritise eco-friendly products and are willing to adopt alternatives provided that performance and cost considerations are acceptable. In hospitality, cafes and bars are adopting compostable straws to distinguish their environmental commitment and to comply with plastic reduction policies. International examples of coconut leaf straw adoption demonstrate that sustainability narratives resonate with environmentally aware consumers and can stimulate repeat purchase behaviour when products deliver on usability and aesthetics.
7. Cost of Production and Pricing
Cost structures for coconut leaf straw production differ from those of conventional plastic or paper straws. Raw materials for coconut leaf straws are essentially a low cost or zero cost input since coconut leaves are an agricultural byproduct. The primary costs arise from labour in cleaning, cutting, shaping, and finishing the straws, as well as from binding and packaging. These costs can vary depending on production scale, level of mechanisation, and quality control processes. Wholesale prices for coconut leaf straws sourced through international suppliers range from approximately one to ten United States cents per unit based on bulk order minimum quantities, illustrating the potential for low cost production when economies of scale are achieved. Retail pricing in other markets reflects added value through packaging, branding, and certification, and typically remains higher than conventional single use plastic straws. Despite higher unit costs relative to plastic, coconut leaf straws are competitively priced within the biodegradable straw segment and benefit from growing demand among businesses willing to absorb or share the cost of sustainable alternatives with consumers.
8. Pros and Cons Relative to Other Alternatives
Coconut leaf straws offer multiple benefits compared with conventional plastic and some other biodegradable alternatives. They are fully compostable without leaving microplastics, require minimal processing, and use agricultural waste rather than dedicated crop inputs or industrial polymers. They are durable in liquids for the duration of typical use and maintain taste neutrality and aesthetic appeal. Unlike reusable straws made of metal or silicone, coconut leaf straws require no cleaning or maintenance, which is often a barrier to restaurant adoption due to hygiene concerns. However, there are limitations. Coconut leaf straws are single use and therefore do not completely eliminate consumption of disposable products. Production is labour intensive, which can increase unit costs compared with mass produced plastic alternatives. Ensuring uniform diameter, length, and structural integrity across batches poses quality control challenges that require standardised processing or mechanisation investment. In comparison with paper straws, coconut leaf straws generally offer superior durability but may require better moisture barrier engineering for use in thicker beverages such as milkshakes.
9. Barriers and Challenges to Adoption
Despite growing consumer interest in sustainable alternatives, the widespread adoption of coconut leaf straws in Sri Lanka faces barriers. Limited familiarity among consumers and businesses with leaf based biodegradable straws may impede initial uptake, particularly if performance expectations are unclear. Establishing supply chains for consistent raw material collection, processing, and quality assurance requires investment in coordination and personnel training. Achieving scale is another challenge, as market demand needs to be matched with reliable production capacity to supply food service, retail, and export orders. Regulatory certification for food contact materials and packaging standards will also be necessary, particularly for international export markets, which may require compliance with food safety and compostability norms. Additionally, cost competitiveness relative to paper and other biodegradable straws remains a challenge, especially for small businesses operating on tight margins.
10. Lessons from International Examples
International examples, such as the adoption of coconut leaf straws by enterprises in India, illustrate pathways for scaling production and market reach. Organisations have developed techniques to convert fallen coconut leaves into biodegradable straws and have built distribution networks that export these products to multiple countries, demonstrating export viability and global demand. These models show that combining artisanal knowledge with mechanised processing can increase output while maintaining quality. Partnerships with eco conscious buyers, participation in sustainability trade shows, and compliance with international compostability and food contact standards have positioned coconut leaf straws as credible alternatives to existing biodegradable options. These examples provide insights for Sri Lankan producers into certification processes, marketing strategies, and supply chain organisation that can enhance competitiveness.
11. Consumer Preferences and Awareness
Consumer acceptance of biodegradable straws, including coconut leaf based options, is influenced by perceived environmental benefit, product performance, and social norms around sustainability. Research on biodegradable alternatives indicates that consumers are more likely to prefer products that demonstrate clear eco credentials, such as compostability and zero chemical additives, and that offer usability on par with traditional materials. Coconut leaf straws, which are naturally biodegradable and free of toxins or dyes, align with such preferences. Businesses that adopt and communicate their use of sustainable straws can reinforce positive consumer perceptions, while educational campaigns about the environmental harms of plastic pollution can further build demand for natural alternatives.
12. Strategic Opportunities and Market Integration
To advance the market potential for coconut leaf straws in Sri Lanka, coordinated strategies are needed across production, marketing, and policy arenas. Investment in processing infrastructure, quality standard development, and worker training can improve product consistency and capacity. Branding and storytelling that highlight the local origin, waste utilisation, and environmental benefits of coconut leaf straws can differentiate Sri Lankan offerings in both domestic and export markets. Partnerships with hospitality sectors, event organisers, and sustainability focused organisations can create early adopter segments and drive wider acceptance. Policy support that aligns with plastic reduction initiatives, such as incentives for adopting biodegradable products, can further stimulate market growth.
13. Conclusion
Coconut leaf based straws represent a promising sustainable alternative to conventional plastic and some biodegradable straw materials within Sri Lanka and beyond. Their use of abundant agricultural waste, biodegradability, and consumer friendly performance characteristics align with global sustainability trends and regulatory pressures to reduce plastic waste. While challenges related to production scale, quality control, consumer awareness, and cost competitiveness remain, strategic value chain development and market positioning can unlock significant market potential. As both local demand and international interest in sustainable products grow, coconut leaf straws offer a viable pathway for circular economy innovation and environmental stewardship in the beverage and hospitality sectors.
Challenges and Limitations in Food Dehydration and Drying in Sri Lanka: A Review.
Review Article by P. M. N. Mihirani and W. R. W. M. S. N. P. Weerakoon (2022)
Read this article on ResearchGate
Challenges and Limitations in Food Dehydration and Drying in Sri Lanka: A Review
P. M. N. Mihirani1 and W. R. W. M. S. N. P. Weerakoon2
1Institute of Sustainable Agricultural, Food, and Environmental Sciences, Sri Lanka.
2Department of Agriculture, Sri Lanka.
Abstract
Food dehydration and drying are critical post-harvest preservation strategies in Sri Lanka, where high humidity, seasonal rainfall, and limited cold chain infrastructure contribute to significant losses of perishable agricultural products. These processes are widely applied across fruits, vegetables, spices, plantation crops, fisheries, medicinal plants, and other biological materials to extend shelf life, stabilize quality, and enable value addition. Despite their importance, drying and dehydration systems in Sri Lanka face persistent challenges related to climate variability, energy access, process control, hygiene, and technical capacity. At the same time, structural limitations arising from technology design, institutional fragmentation, market constraints, and supply chain inefficiencies restrict performance, scalability, and competitiveness. This narrative review critically synthesizes published scholarly literature and national studies to examine these challenges and limitations while maintaining clear conceptual distinctions between drying and dehydration, and between challenges and limitations. The review integrates evidence from multiple commodity sectors and highlights key knowledge gaps and priorities for research, policy, and technological development to strengthen food preservation outcomes and agri food system resilience in Sri Lanka.
1. Introduction
Sri Lanka’s agricultural and fisheries sectors are characterized by the production of a wide diversity of high moisture commodities, including fruits, vegetables, spices, plantation crops, fish, leafy greens, roots and tubers, and medicinal plants. These products are biologically active and highly susceptible to spoilage under tropical conditions, particularly in the absence of adequate cold storage and controlled handling systems. Post harvest losses therefore remain a major constraint to food security, farmer incomes, and value chain efficiency.
Numerous studies have documented substantial post-harvest losses in Sri Lanka, particularly for fruits and vegetables, with reported losses ranging from approximately 15 percent to 40 percent depending on commodity type, season, and supply chain characteristics (Rajapaksha et al., 2021; Wasala et al., 2025). Losses also occur in fisheries, spices, and plantation crops, where improper drying and storage can lead to microbial spoilage, insect infestation, and quality degradation.
Drying and dehydration are among the most widely used preservation strategies to address these losses. Traditional drying methods such as sun drying and open-air drying are deeply embedded in Sri Lankan food systems, while mechanical and solar assisted dehydration technologies have gained attention for their potential to improve product quality and market access. However, outcomes remain uneven due to conceptual ambiguity between drying and dehydration, and due to insufficient consideration of the distinct challenges and limitations affecting each process. This review provides a comprehensive synthesis of these issues across multiple sectors.
2. Methodology
This study adopts a structured narrative review methodology. Peer reviewed journal articles, academic theses, institutional research reports, and policy documents related to food drying, dehydration, and post-harvest management in Sri Lanka were identified through searches of academic databases and publicly accessible repositories. Search terms included Sri Lanka, food drying, dehydration, post-harvest loss, fruit processing, vegetable processing, spice drying, fish drying, and value addition.
Sources were screened for relevance to Sri Lanka and for their contribution to understanding process performance, quality outcomes, technological systems, or systemic constraints. Priority was given to studies presenting empirical data, sectoral analyses, or case studies specific to Sri Lanka. Where Sri Lanka specific evidence was limited, studies from comparable tropical contexts were used to support interpretation. The literature was synthesized narratively and organized thematically, without quantitative meta-analysis, consistent with established approaches to narrative reviews.
3. Conceptual Framework
3.1 Drying
Drying refers to the removal of moisture from food materials through exposure to heat and air movement, often under ambient or semi controlled conditions. In Sri Lanka, drying is commonly practiced through sun drying, open racks, mats, and rudimentary hot air systems. The primary objective is to reduce moisture content to levels that delay spoilage and extend shelf life. Drying practices are typically dependent on weather conditions and operator experience, resulting in variability in moisture reduction, quality, and safety outcomes.
3.2 Dehydration
Dehydration is a controlled food preservation process in which temperature, airflow, humidity, and time are regulated to achieve defined moisture content or water activity targets. Dehydration aims to preserve sensory attributes, nutritional quality, functional properties, and rehydration capacity in addition to extending shelf life. Mechanical hot air dehydration, solar assisted dehydration, and hybrid systems fall within this category. Dehydration generally requires higher capital investment, reliable energy supply, and technical expertise compared to traditional drying.
3.3 Challenges and Limitations
In this review, challenges are defined as contextual factors that complicate effective application of drying and dehydration, including climatic variability, energy access, skill constraints, and operational conditions. Limitations refer to inherent or structural constraints within technologies, institutions, markets, and supply chains that restrict performance, scalability, or long-term sustainability.
4. Post Harvest Loss Context in Sri Lanka
4.1 Fruits and Vegetables
Post harvest losses of fruits and vegetables in Sri Lanka are consistently reported as high. Studies estimate that between 30 percent and 40 percent of fruits and vegetables are lost across harvesting, handling, transport, storage, and processing stages (Rajapaksha et al., 2021; Wasala et al., 2025). Key drivers include mechanical damage during harvesting, inadequate packaging, exposure to high ambient temperatures, lack of cold chain infrastructure, and delays between harvest and processing.
Drying and dehydration offer opportunities to reduce these losses, particularly during periods of seasonal surplus for crops such as mango, pineapple, banana, jackfruit, papaya, tomato, and leafy vegetables. However, the effectiveness of these processes depends on timely application and adequate control of moisture removal.
4.2 Spices and Plantation Crops
Sri Lanka is internationally recognized for spice production, particularly cinnamon, pepper, cloves, nutmeg, and cardamom. Drying is a critical step in spice processing and directly influences aroma, color, oil content, and storage stability. Traditional sun drying is widely used but is highly sensitive to weather conditions, leading to quality variability and contamination risks. In plantation crops such as coconut, drying processes are central to products such as copra, where inadequate drying can promote fungal growth and mycotoxin formation.
4.3 Fisheries, Medicinal Plants, and Other Products
Drying of fish is an important livelihood activity in coastal regions, enabling preservation of surplus catch. However, uncontrolled drying conditions, poor hygiene, and inconsistent moisture reduction contribute to quality deterioration and food safety concerns (ICSF, 2016). Similar issues arise in drying of leafy vegetables, roots and tubers, and medicinal plants, which are often processed informally with limited technical guidance.
5. Challenges in Drying Practices
5.1 Climatic Challenges
Sri Lanka’s tropical climate presents fundamental challenges to drying. High relative humidity reduces the moisture gradient between food and surrounding air, slowing drying rates and increasing equilibrium moisture content. Frequent rainfall, particularly during monsoon seasons, disrupts sun drying cycles and leads to moisture reabsorption. These conditions increase the risk of microbial growth, enzymatic activity, and spoilage.
5.2 Quality Degradation
Uncontrolled drying can result in uneven moisture removal, surface hardening, discoloration, and loss of volatile compounds. Prolonged exposure to heat, oxygen, and sunlight accelerates degradation of heat sensitive vitamins and bioactive compounds, reducing nutritional value. In fruits and vegetables, such quality deterioration strongly affects consumer acceptance and marketability.
5.3 Hygiene and Food Safety
Open drying systems expose food to dust, insects, birds, rodents, and domestic animals. Inadequate sanitation during handling and drying increases the risk of microbial contamination and food borne illness. Limited awareness of good manufacturing practices and lack of basic infrastructure exacerbate these risks in small scale operations.
6. Challenges in Dehydration Systems
6.1 Energy Availability and Cost
Dehydration systems require reliable energy to maintain controlled temperature and airflow. In Sri Lanka, electricity costs are relatively high, and access to stable grid power is limited in many rural areas. Biomass fueled systems face challenges related to fuel quality, emissions, and temperature control. Solar assisted dehydration systems offer potential benefits but require careful design to address intermittency and high humidity conditions (Esper and Muhlbauer, 1998).
6.2 Technical Capacity and Operation
Effective dehydration depends on understanding drying kinetics, moisture targets, pre treatment methods such as blanching or osmotic dehydration, and process monitoring. Limited access to training and extension services results in suboptimal operation of dehydration equipment, reduced efficiency, and inconsistent product quality.
6.3 Scale and Supply Constraints
Most dehydration initiatives operate at small or pilot scale. Irregular raw material supply due to seasonality, lack of aggregation mechanisms, and limited working capital constrain system utilization and prevent economies of scale. These challenges are particularly evident in fruit and vegetable dehydration.
7. Structural Limitations
7.1 Technological Limitations
Many drying and dehydration systems used in Sri Lanka rely on outdated or poorly optimized designs. Locally fabricated dryers often lack validated performance data and exhibit uneven airflow and temperature distribution. Advanced dehydration technologies such as vacuum drying or freeze-drying offer superior quality outcomes but remain largely inaccessible due to high capital and operational costs.
7.2 Institutional and Policy Limitations
Institutional responsibilities for post-harvest management, food processing, and technology development are fragmented across multiple agencies. Limited coordination reduces the effectiveness of research dissemination, technology transfer, and standard setting. Weak enforcement of quality and safety standards reduces incentives for upgrading drying and dehydration practices.
7.3 Market and Economic Limitations
Domestic markets for dried and dehydrated products are price sensitive, limiting willingness to pay for higher quality products. Export markets offer opportunities but require compliance with stringent quality, safety, and traceability requirements that many small and medium enterprises struggle to meet (Dissanayake et al., 2024).
8. Knowledge and Supply Chain Limitations
Variability in raw material quality, lack of cold chain infrastructure, and fragmented supply chains introduce uncertainty into drying and dehydration processes. Limited dissemination of research findings and inadequate training constrain adoption of improved practices. Many operators rely on experiential knowledge rather than scientifically validated methods, leading to inconsistent outcomes.
9. Discussion and Synthesis
The challenges and limitations affecting drying and dehydration in Sri Lanka are deeply interconnected. Climatic constraints amplify technological weaknesses, while institutional and market limitations restrict the diffusion of improved solutions. Addressing these issues requires integrated approaches that combine appropriate technology development, renewable energy integration, capacity building, supply chain coordination, and supportive policy frameworks.
10. Conclusion
Drying and dehydration are vital components of Sri Lanka’s food preservation landscape, with relevance across fruits, vegetables, spices, plantation crops, fisheries, and other biological products. However, their effectiveness is constrained by environmental challenges and structural limitations that reduce quality, safety, and scalability. Clear differentiation between drying and dehydration, combined with targeted investments in technology, skills, and governance, is essential to reduce post-harvest losses, improve food security, and strengthen agri food system resilience in Sri Lanka
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