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Anaerobic Digestion

How it works...

When you put your food waste into your kitchen bin, there are many ways your waste might be recycled. At pale green dot 100% of our food waste is taken to an anaerobic digestion plant.

Anaerobic digestion is when organic matter, such as animal or food waste, is broken down to produce biogas and bio fertilizer.

Anaerobic Digestion Waste Anaerobic Digestion Plant

It works by creating an absence of oxygen. This causes biogas to be produced, which is taken to a gas holder, then transported to a combined heat and power unit, to generate electricity. Then this is outputted on to the National Grid. Did you know, 10 tonnes of food waste is enough to power one home, on average, for 24 hours.

The anaerobic digestion process, also creates a space for micro-organisms to break down and eat all the food waste, which after a time becomes nutrient rich bio fertilizer. This is then put back on to the soil once more, it is a 100% nutrient efficient process.

Anaerobic digestion has a wide range of benefits; one being it is a carbon neutral operation. For example every tonne of food waste going into anaerobic digestion prevents between 0.5 to 1.0 tonne of CO2 entering the atmosphere! To put that in perspective that is around the same as someone driving 3700 miles in a diesel car.

At pale green dot, we strive to operate in the most sustainable way across our entire business and we are always looking for ways to improve whilst reducing waste. For us anaerobic digestion is the perfect solution to disposing of food waste. Not only does it create energy for our homes but it also helps us to grow fresh prpduce too!

Helping us to create a closed loop food system and a truly circular economy.