- TECHNOLOGY & INNOVATION
Driving Clean Progress
How Biogas Works
Biogas is a renewable energy source produced from organic waste through a process called anaerobic digestion. Here’s how it works in four simple steps:
01
Collecting Organic Waste
Organic materials like animal manure, crop residues, food waste, or human waste are collected.
These materials are fed into a sealed container called a digester.
02
Breaking Down the Waste
Inside the digester, microorganisms (bacteria) break down the organic waste in an environment without oxygen.
Biogas: A mixture of methane (CH4) and carbon dioxide (CO2), used as a clean fuel.
Digestate: A nutrient-rich slurry that can be used as an organic fertilizer.
03
Capturing Biogas
The biogas rises to the top of the digester and is captured in a storage tank or directly piped to where it’s needed.
This gas can power stoves, lights, generators, or industrial processes.
04
Using Digestate as Fertilizer
The leftover material (digestate) is rich in nutrients and can be applied to crops as an eco-friendly fertilizer, promoting sustainable agriculture.
Diagram of the Biogas Process
Key Components in the System
Input Feed
A channel or tank where organic waste is added.
Digester Tank
A sealed chamber where anaerobic digestion occurs.
Gas Outlet
A pipe for extracting biogas for use.
Fertilizer Outlet
A pipe or chamber for collecting the digestate.
