Launching My Floating Farm: What Will The Locals Think? | Growing Wild: Project Castaway - Part 3/3

Project Castaway: Creating a Floating Farm

Key Concepts:

• Floating Farm: A sustainable aquaculture system built on water to address climate change and food security.
• Chinampa: A floating planter made from recycled materials, designed for growing vegetables.
• Integrated Multi-Trophic Aquaculture (IMTA): A system where different species are cultivated together, with the waste of one species serving as food for another.
• Nature-Based Solutions: Utilizing natural resources and ecosystems to address environmental challenges.
• Saline Agriculture: Growing crops that can tolerate salty water conditions.
• Low Trophic Level Species: Focusing on cultivating species lower in the food chain (e.g., seaweed, oysters) for sustainability.
• Agriport: A large-scale floating platform designed for food production, energy generation, and coastal protection.

Initial Sea Trials and Design Simplification

The video begins with the team's initial sea trials of two "Chinampa" designs, which unfortunately failed due to instability. The team then decided to simplify their approach, focusing on readily available materials and a lighter, more nimble design. The new system consists of:

• Floats: Plastic bottles wrapped in a net.
• Planters: Self-watering planters made from pots or easily sourced materials.

The simplified design proved to be much more stable and floaty during testing.

Project Castaway: The Ambitious Idea

The core idea behind Project Castaway is to create a floating farm at sea, addressing rising sea levels and food security. The project aims to create something new, as there are not many existing examples of this type of system.

Research and Community Engagement

The team traveled to coastal communities to understand the impact of climate change, consulting with farmers, fishermen, marine ecologists, and environmental scientists. Key findings included:

• Oysters can survive in higher water temperatures (30°C) compared to mussels.
• Cattails (List Doda) are a crop that can thrive in high water levels.
• Some varieties of crops, like cauliflower, broccoli, radishes, and strawberries, can tolerate salt.
• Focusing on low trophic level species like seaweed is more sustainable for feeding the world population.
• Seaweed absorbs carbon dioxide, increasing the pH level and improving ocean health.

Prototype Development and Testing

The team built a prototype on Boom Boom Island in Sona, Malaysia, where the impact of climate change is evident. The prototype underwent various tests, including:

• Simulated rain.
• Exposure to salty water.

The prototype revealed some imperfections, such as water seepage, but provided valuable insights for refinement.

Construction of the Floating Farm

Project Castaway consists of five floating ports and six floating lines:

• Port 1: A sheltered workspace supported by 17 plastic barrels, capable of holding two tons.
• Ports 2-5: Identical aquacultural modules for cultivating rabbit fish, lobsters, sea cucumbers, and oysters.
• Floating Lines: 6x5 meter lines for growing seaweed, sea grapes, sweet potato leaves, and portulaca. Three lines face the open sea, while the other three are between the ports and the shoreline.

The goal is to create a self-sufficient system where:

• Seaweed and sea grapes form the base of the system.
• Seaweed acts as fertilizer for crops.
• Rabbit fish feed on seaweed.
• Rabbit fish waste feeds oysters and sea cucumbers.
• All components can be consumed fresh or processed into food products.

Construction Challenges and Community Collaboration

Building the platform on water proved challenging, even for experienced contractors. The project faced delays and logistical hurdles, such as transporting heavy materials. Despite these challenges, the community of Boom Boom Island actively participated in the project, providing valuable knowledge and labor.

Material Sourcing and Plant Selection

Materials were sourced locally whenever possible. Custom-made nets were sewn to size, with reinforced holes. Plants were grown through propagation from cuttings, rather than seeds. The team selected specific varieties of plants, including green and purple sweet potato leaves and pilakas, for the chinampas.

Teamwork and Construction Process

The team divided into groups to tackle different tasks:

• Transplanting plants into smaller net pots using a mix of topsoil and cocoa peat.
• Experimenting with creatine (made from chicken feathers) as an alternative substrate.
• Constructing chinampas, each consisting of vegetable trays, floats (50 bottles), and ballasts (6 bottles filled with seawater).
• Anchoring the platform with four 200 kg concrete blocks.

Launching the Floating Farm

The floating lines were laid out, and the completed platform was towed 300 meters out to sea. The towing process was difficult due to strong currents and weather conditions. Atan played a crucial role in securing the anchor lines and positioning the platform.

Sustainable Fertilization and Feeding Strategies

The team explored sustainable methods for fertilizing plants and feeding aquaculture species:

• Seaweed Fertilizer: Fermented seaweed mixed with raw sugar or molasses, diluted with water. The solution is applied when leaves show nutrient deficiencies (yellowing or orange).
• Sea Cucumber Feed: Chicken manure mixed with sand, providing nutrients and bacteria for microorganisms that sea cucumbers consume. Food waste can also be used as an alternative.

Populating the Farm and Open House Preparation

The team populated the farm with oysters, seaweed, and other species. They prepared for an open house to showcase the project to the community. Dr. IDB provided guidance on oyster cultivation.

Open House and Community Engagement

The open house aimed to introduce the community to the concept of floating farms and encourage ownership of the project. The event included:

• Presentations and demonstrations.
• A tour of the platform.
• Snacks made from rabbit fish and other ingredients grown on the farm.

Inspiration from Other Floating Farms

The video highlights other examples of floating farms around the world:

• Tomato Farm in Saga, Japan: A farmer developed a floating system to protect plants from flooding.
• Floating Dairy Farm in Rotterdam: A three-story farm with 40 cows, built to ensure food security in the face of climate change.

The Singapore Agriport Concept

The video introduces the Singapore Agriport, a proposed large-scale floating platform designed for food production, energy generation, and coastal protection. The Agriport would:

• Protect the East Coast Park coastline from flooding.
• Generate water and energy.
• Fulfill 100% of Singapore's vegetable needs.
• House chicken farms, fish farms, and meat processing operations.
• Incorporate coral reef propagation.

Conclusion

Project Castaway represents a significant step towards creating sustainable and climate-resilient food production systems. The project demonstrates the potential of floating farms to address food security, promote community engagement, and inspire innovative solutions for a changing world. The team emphasizes the importance of scaling up these efforts and integrating them into larger nature-based solutions.