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A BRIEF HISTORY OF AD

During the 10th century BC, anecdotal evidence suggests that biogas was used to heat bathwater in Assyria. In 1859, the first AD plant was built on a leper colony in India. AD reached England in 1895 where a “carefully designed” sewage treatment facility fuelled street lamps in Exeter. During World War 2, buses ran on biogas balloons.

buses

Today, millions of micro AD systems exist in developing countries, particularly China, India and Nepal, while developed countries tend towards large industrial scale plants with Germany, Austria, Denmark and Scandinavian countries leading the way.

micro AD systems

Small scale digester in Uganda

Plastic AD system from India

micro AD systems

Industrial scale egg shaped digesters near NYC, USA used for waste water treatment.

1480m3 AD plant on a UK farm processing slurry, maize and glycerol.

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Learn how to build your own hydroponics system

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ANAEROBIC DIGESTION

anaerobic digestion

During decomposition, organic wastes (food, manure, non-woody green waste etc.) emit CO2 and methane. Methane is a greenhouse gas 20-30 times more... Read More >

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BIOGAS

biogas

Biogas is released during anaerobic digestion and captured for use as a clean fuel. When produced from food waste, it is approximately 60%... Read More >

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DIGESTATE

digestate

Like composting, AD preserves all the nutrients of the organic waste it processes, with an impressive 80% of the total nitrogen in food waste-based... Read More >

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METHANE

methane

Anaerobic digestion captures methane in the process of decomposing organic waste. This is important as methane is a far more powerful... Read More >

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AIR QUALITY

air quality

By generating a clean fuel, anaerobic digestion helps to reduce air pollution and our reliance on less sustainable sources of energy... Read More >

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GREENHOUSE OPTION

greenhouse option

The AD/greenhouse combination can be a beautiful organic resource, providing fresh, local produce and serving as an educational community cent... Read More >

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