Ioannis Kaimakamis

From “polluting waste” to strategic input in Greek dairy – and why I chose to design a project around it.

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If you spend enough time inside a Greek cheese plant, you realise the business doesn’t really start with milk. It begins with what is left over when the cheese is done.

That “leftover” is whey – and for decades we have treated it as a nuisance to dispose of, not as an asset to design around. The business logic behind what I call Project Whey is an attempt to flip that equation: to build an industrial model that starts from whey streams and works backwards to products, markets and capital investment.

What follows is not a word-for-word summary of a pitch deck. It is my own interpretation of what this kind of project suggests for Greek dairy, circular economy policy, and our approach to investments in agri-food.

From polluting waste to premium input

European law defines whey as a by-product of cheese or casein production. In reality, it is much more than that. It is a nutrient-rich liquid that still contains a significant proportion of the energy and protein of the original milk: lactose at about 4.5–5.5% w/v, along with proteins, peptides, minerals, and vitamins.

In the old model, most of this ended up as a headache. Whey discharged untreated, it is a potent pollutant. Neutralising or disposing of it costs money, ties up tank capacity, and often sits low on the priority list for small and medium dairies fighting to stay alive on thin margins.

At the same time, global demand for whey-based ingredients has quietly exploded over the past two decades. From sports nutrition and infant formula to bakery, confectionery and medical nutrition, whey proteins and lactose derivatives have migrated from “residual commodity” to strategic input. Prices, product portfolios and R&D pipelines have all moved in favour of those who can process whey at scale and with precision.

The contradiction is straightforward: whey has never been more valuable worldwide, yet in many Greek plants it is still processed, priced, and considered waste mentally.

The Greek paradox: exporting value, importing complexity

Greece is not a marginal player in dairy. It is a serious cheese-producing country with strong brands, export momentum and a long tradition in whey cheeses such as mizithra, anthotyro and manouri.

And yet, if you look at trade flows for products under code 0404 (whey and modified whey), a different story emerges. In recent years Greece has increased its whey exports, with volumes broadly stable to slightly up. The bulk of these exports are directed to Italy, with additional growth towards China and neighbouring countries. Average export prices have risen sharply – well above 30% in just a few years – but still reflect products that are traded largely in bulk, low-processed form.

In simple terms, we are exporting a strategic raw material with relatively low added value, while competing in an increasingly competitive international market for finished dairy products, ingredients, and functional foods.

There is one significant exception: the Macedonian Proteins / Hellenic Protein group, which has invested in whey protein concentrates, specialised powders, and vertically integrated whey processing. However, even there, the model is not centred on whey cheeses like mizithra, nor on the specific streams of sheep and goat milk that dominate Greek PDO cheese production.

For the whey streams linked to mizithra – especially from milk of small ruminants – Greece still lacks an integrated, purpose-built industrial anchor.

Designing a business that starts from whey

Project Whey is based on a different premise: consider that the whey streams from a mizithra-focused dairy are not an issue to be controlled, but rather the main asset of the business.

The investment I have in mind is of the order of €9 million. Roughly €6.5 million are allocated to a modern pasteurised mizithra line (fresh and “dry type”), about €2.1 million to by-product processing (ethyl alcohol and yeast products), with land and supporting infrastructure on top. In steady state, the plant would process close to 6 million kilograms of whey and cream per year.

From there, the operating model unfolds in three layers.

1. Core dairy products
Fresh pasteurised mizithra and dry mizithra form the “front-end” of the portfolio. They are designed primarily for B2B use in frozen doughs, pies and other bakery applications – sectors where Greek processors already operate at scale and export. The objective is not to chase every retail niche, but to lock in stable industrial demand for a consistent, functional ingredient.

2. Biorefinery of whey fractions
Instead of treating whey as diluted waste, the model concentrates and ferments it. Lactose is converted via microbial processes into:

• ethyl alcohol, which can be used in food, beverages or industrial applications, and
• yeast and yeast-derived products, with potential roles in animal nutrition or specialised food ingredients.

This is not just a laboratory fantasy. Similar models are already running at a large scale internationally. The innovation in the Greek case lies in adaptation: to local raw materials, local energy conditions, and our own mix of products.

3. Carbon and circularity layer
By preventing uncontrolled whey discharge and substituting more carbon-intensive inputs elsewhere in the value chain, the project can generate carbon credits. In the financial model, these represent a separate revenue stream, increasing over time and strengthening the circular economy aspect of the investment.

Financially, the combined effect is a business that can grow turnover from roughly €7 million in its early years to above €15 million within a decade, with EBITDA margins in the mid-teens to mid-twenties. The exact number is less important than the shift in logic: profitability does not come despite whey. It comes because whey is fully integrated into the product and revenue architecture.

From SWOT to WASTE: reframing how we analyse dairy projects

One element I find particularly interesting in this work is methodological, not technical. Instead of starting from a conventional SWOT table, I prefer to start from WASTE: wastefulness in resource use, waste of nutrients, waste of potential revenue, waste of environmental capacity.

If you redesign the project around the elimination (or monetisation) of that waste, different choices emerge:

• You don’t ask “what can I do with surplus whey if I have some spare tanks?”. You ask “how do I need to structure the plant so that every litre of whey has a clear pathway to a marketable output?”.
• You don’t treat environmental compliance as a pure cost centre, but as a lever for new revenue (carbon credits, green finance eligibility, ESG-linked lending).
• You no longer position the plant as “just another cheese factory”, but as a sustainability endpoint for a cluster of dairies that face the same structural problem with whey.

This way of thinking is not about one company. It is a template for how investments in agri-food can be structured when circularity is taken seriously – and reflected in the financial model, not only in marketing slides.

Why this matters for Greek dairy strategy

Seen in isolation, Project Whey is an attractive niche investment in a growing ingredient category. Seen in context, it says something deeper about where Greek dairy – and Greek livestock more broadly – needs to move.

First, it recognises that scale and specialisation in by-products are no longer optional. Small, fragmented solutions (a little drying here, some animal feed there) are insufficient when environmental regulations tighten and global ingredient markets become more professional.

Secondly, it demonstrates that B2B industrial channels—frozen dough, bakery, ready meals—can provide more reliable outlets for whey-based cheeses than retail alone. These channels value consistency, traceability, functionality, and price. A facility designed around these requirements can support long-term contracts and back-to-back agreements with milk suppliers.

Third, it integrates circular economy and climate goals into the core of the business model, not as CSR embellishments. Carbon credits, reduced effluent loads, nutrient recovery, and energy efficiency are all embedded in the project’s architecture. That aligns precisely with the language of the Green Deal, the CAP’s green framework, and modern financial markets.

Finally, it opens a conversation about the kind of innovation ecosystem Greece wants in dairy. Today, most advanced whey valorisation capacity either sits abroad – via export of raw material – or in a very small number of specialised players. A project like this suggests a different route: anchor investments that are deeply connected with primary production, but technologically ambitious and outward-looking.

Beyond one plant: questions for policymakers and investors

For policymakers, the message is clear: if we continue to treat by-product management as a minor detail in licensing and subsidy policies, we will keep exporting value and importing complexity. Projects that industrialise the circular use of whey, manure, slaughter by-products, and other “wastes” are precisely where CAP funds, green finance tools, and innovation programmes should come together.

For banks and investors, the message is that agri-food projects with “waste at the centre” can align with contemporary risk–return profiles. They combine tangible assets, long-term supply contracts, and defensible know-how with clear ESG narratives and measurable environmental impacts. However, they require a different evaluation approach: one that comprehends both the physics of dairy processing and the economics of ingredient markets.

And for the dairy sector itself, Project Whey is an invitation to think more aggressively: to move from “how do I minimise the problem of whey?” to “how do I make whey the reason this business exists?”.

The business here starts with whey

When I prepared the first versions of the pitch for Project Whey in the spring of 2024, whey prices already told a clear story: what used to be a liability was becoming, in many markets, the main driver of margin in the dairy complex.

The Greek sector has two options. It can either watch this transition from the sidelines, exporting raw material and importing “finished sophistication”, or it can design and finance its own answer.

A well-structured whey project does not solve every problem of the Greek dairy ecosystem. But it does show, in very concrete terms, what it looks like to turn a “problem stream” into a portfolio of products, revenues and climate benefits.

And it is a reminder of something simple: in the next phase of dairy, the most important part of the business may no longer be what we see in the cheese counter. It may be what used to flow out of the back of the plant, unnoticed.