From Waste to Table: How a Circular Food System Works

What if the food on your table today started as yesterday’s food waste?

It sounds strange at first. We usually think of food as having a simple journey: it is produced, sold, eaten, and eventually thrown away. But what happens if that “waste” is not actually the end?

In a circular food system, food waste can become part of another cycle. Organic waste can be separated and processed, nutrients can be recovered, and biological resources can return to farming and food production.

The journey can look something like this:

Food → Consumption → Organic Waste → BSF → Feed → Farming → Food → Table

The cycle continues.

This idea connects three important conversations: food waste, circular farming, and sustainable food systems. It also shows how a different approach to waste can create value for farmers, livestock producers, food businesses, and communities.

At Umah Pupa, this is the idea behind building a more connected circular food ecosystem in Bali.

From Table to Waste

Every food system starts with food. Food is grown, harvested, transported, prepared, served, and eventually consumed. Along the way, however, not everything ends up being eaten. Vegetable scraps, fruit peels, leftover food, and other organic materials can become part of the waste stream. For hotels, restaurants, households, markets, and other food businesses, this can happen every day. The conventional response is simple:

Eat → Throw away → Dispose

But organic waste is different from materials that have no biological value. It still contains organic matter and nutrients. So instead of asking only:

“Where should this waste go?”

a circular food system asks:

“What can this resource become next?”

Why Organic Waste Matters

Organic waste is often treated as a disposal problem. However, when properly separated and managed, it can also become an input for another biological process. This is where source separation becomes important. Organic waste should be separated from materials such as plastic, chemicals, and other contaminants before it enters a biological processing system. For a circular system to work, the quality of the input matters. A simple system can start with something as basic as:

One dedicated container for organic waste.

From there, the material can be collected, sorted, and processed according to its characteristics. This makes waste management part of the food system rather than something completely separate from it.

From Organic Waste to BSF

One way to transform suitable organic waste is through Black Soldier Fly (BSF) larvae. BSF larvae, commonly called maggots, can consume suitable organic materials and convert part of that material into insect biomass. The basic process is:

Organic Waste → BSF Larvae → Insect Biomass + Frass

The larvae become a source of insect protein and other nutrients, while the remaining material can have agricultural value when properly managed. This is one of the reasons BSF in Bali has potential beyond waste management. It creates a connection between two systems that are usually treated separately:

Waste management + food production.

Instead of organic waste simply leaving the food system, it can be transformed into a resource that supports another part of the system.

From Maggot to Feed

The next step is where waste begins to reconnect with agriculture. BSF larvae can be processed into different forms, depending on their intended application. These can include fresh maggot, dried maggot, and maggot powder. These products can be explored as alternative feed ingredients for appropriate livestock and aquaculture applications. This does not mean that maggot should automatically replace conventional feed. Animal nutrition still requires a balanced combination of protein, energy, amino acids, vitamins, and minerals. Instead, the opportunity lies in using BSF as part of a broader feed strategy.

In this way:

Organic Waste → BSF → Alternative Protein → Animal Feed

A resource that was once considered waste has now entered another stage of the food system.

From Feed to Farm

But the circular journey does not stop at animal feed. Feed supports animals. Animals support food production. And farms produce food that can eventually return to households, restaurants, hotels, and communities. The cycle becomes:

Organic Waste
↓
BSF Processing
↓
Maggot / Alternative Feed
↓
Livestock & Aquaculture
↓
Food Production
↓
People, Restaurants & Hotels
↓
Organic Food Waste
↓
Back Into the System

This is where circular farming becomes part of the bigger picture. The farm is no longer an isolated production site. It becomes one part of a larger ecosystem connecting waste, feed, agriculture, food businesses, and consumers.

From Farm Back to the Table

The ultimate goal of a circular food system is not simply to process more waste. It is to keep resources moving. Food produced by farms can return to the places where food is prepared and consumed. For example, locally produced eggs, meat, vegetables, or other agricultural products can potentially supply hotels, restaurants, and communities. After consumption, the organic leftovers can once again become a resource.

The loop looks like this:
Waste → Feed → Farm → Food → Table → Waste

And then it starts again.

This is the difference between a linear food system and a circular one. A linear system has an endpoint. A circular system keeps looking for the next useful connection.

What Makes a Food System Truly Circular?
Circularity is not simply about recycling. It requires different parts of the system to work together.
1. Waste is separated at the source
Organic waste needs to be separated before processing to reduce contamination and maintain the quality of the material.
2. Waste becomes a resource
Instead of sending suitable organic material directly to disposal, it can be processed through biological systems such as BSF.
3. Resources return to production
BSF biomass can become an alternative feed resource, while other outputs can support agricultural applications.
4. Farms produce food again
Livestock, aquaculture, and agriculture turn these resources back into products.
5. Food returns to people
Food reaches households, hotels, restaurants, and communities.
6. The cycle starts again
After consumption, suitable organic waste can return to the system.

That is what makes the system circular.

What Does This Look Like at Umah Pupa?

At Umah Pupa, the idea of circular living is not limited to one product or one activity. It is about connecting different parts of the food system. A hotel or restaurant can contribute by separating its organic waste. Umah Pupa can process suitable organic waste through a BSF system. The resulting maggot can become a potential alternative feed resource for farmers and livestock producers. Agricultural production can then generate food that can potentially return to hotels, restaurants, and communities. This creates a network of participants rather than a one-way transaction.

Hotels & Restaurants
→ Organic Waste
Umah Pupa
→ BSF Processing
Farmers & Livestock Producers
→ Feed & Food Production
Hotels, Restaurants & Communities
→ Food Consumption
Organic Waste
→ Back to the beginning

The system becomes a shared ecosystem. Why Closing the Loop Matters in Bali This approach is particularly relevant in Bali. The island has a strong agricultural tradition, while tourism and hospitality generate significant amounts of food and organic waste. These two realities do not have to exist separately. Food businesses can become part of waste management. Waste can become an input for agriculture. Agriculture can supply food back to the same communities and businesses.

This creates an opportunity for a more local, connected, and sustainable food system.

It also changes how we think about waste.

Waste is no longer simply something that needs to disappear.

It becomes part of a larger question:

How can we keep the resources within our food system for longer?

Circular Food Is About More Than Maggot

BSF is only one part of the system.

The bigger idea is circularity.

Maggot can help connect organic waste with animal feed. Farming can connect feed with food production. Hotels and restaurants can connect food production with consumers. Every participant has a role. That could mean:
– A restaurant separating organic waste
– A hotel supporting local food production
– A farmer using alternative feed resources
– A livestock producer exploring locally available protein
– A consumer choosing locally produced food
– A community learning how waste can become a resource

The system becomes stronger when more people participate And at Umah Pupa, we believe the future of food is not just about producing more. It is about learning how to keep the resources we already have in circulation.