Karya Ilmiah STEM Pemenang Lomba Kihajar STEM Tahun 2019

Introduction

This tutorial will guide you through the process of creating a STEM-based project that utilizes wastewater from ablution (wudlu) to cultivate catfish (lele) and irrigate plants. This innovative project demonstrates the integration of science, technology, engineering, and mathematics in a practical application, showcasing how waste management can contribute to sustainable agriculture.

Step 1: Understanding the Project Concept

• Identify the Purpose: The primary objective is to use wastewater effectively by transforming it into a resource for fish farming and irrigation.
• Research: Gather information on the benefits of aquaponics, which combines aquaculture (raising fish) with hydroponics (growing plants in water).

Step 2: Designing the System

• Components Needed:
  • Container for fish rearing (e.g., a fish tank or pond)
  • Water pump for circulation
  • Waterwheel or similar mechanism for lifting water
  • Plant growing beds
• Sketch Your Design: Create a diagram that illustrates how the components will connect and function together.

Step 3: Setting Up the Fish Rearing Container

• Choose a Suitable Location: Pick a spot that receives adequate sunlight and is accessible for maintenance.
• Install the Container: Place the fish tank securely and ensure it is watertight.
• Fill with Water: Initially fill the tank with clean water to establish a healthy environment before introducing fish.

Step 4: Implementing the Water Circulation System

• Install the Water Pump:
  • Connect the pump to the fish container.
  • Ensure the pump is suitable for the volume of water and the height it needs to lift.
• Create the Waterwheel:
  • Build or purchase a waterwheel that can effectively lift water from the fish tank to the plant beds.
  • Ensure it is properly aligned and functioning smoothly.

Step 5: Preparing the Plant Growing Area

• Select Suitable Plants: Choose plants that thrive in nutrient-rich water, such as leafy greens or herbs.
• Set Up Growing Beds: Use containers or trays that allow for proper drainage and can hold the plants securely.
• Connect the Irrigation System: Ensure that water from the fish tank can flow into the plant growing area.

Step 6: Introducing Fish

• Choose the Right Species: Select catfish as they are hardy and grow well in aquaponic systems.
• Acclimate the Fish: Introduce the fish gradually to their new environment to minimize stress.
• Monitor Water Quality: Regularly check parameters such as pH, ammonia, and oxygen levels to maintain a healthy habitat for the fish.

Step 7: Maintenance and Monitoring

• Regular Checks: Inspect the system daily to ensure the water pump and waterwheel are functioning correctly.
• Feed the Fish: Provide a balanced diet specifically formulated for catfish.
• Observe Plant Growth: Monitor the plants for signs of nutrient deficiencies or diseases.

Conclusion

This project not only illustrates the principles of STEM but also promotes sustainability by repurposing wastewater. By following these steps, you can create a functional aquaponics system that contributes to both fish farming and plant irrigation. Consider expanding the project by experimenting with different fish or plant species or incorporating additional features like a filtration system for enhanced water quality management. Happy gardening and fish farming!