How anaerobic digestion works

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Brightmark's anaerobic digestion* projects capture food waste and animal manure from agricultural facilities and convert that waste into renewable natural gas, fertilizer, and water that can be recycled back into agricultural and energy systems for reuse.

* Anaerobic digestion

The chemical process by which organic matter is broken down by microorganisms in the absence of oxygen, which results in the generation of carbon dioxide (CO2) and methane (CH4). A renewable source of energy.

DIGESTERS AT ATHENA PROJECT IN SOUTH DAKOTA

Anaerobic digestion recaptures the value in organic waste streams.

With Brightmark, we now generate energy that was being wasted before—we are preventing waste and creating useable products.

- John Morris // Pilgrim's Complex Environmental Manager

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Here's a glimpse of how it works

STEP 1

Collect

Manure, food, and other organic waste is collected on farms, food processing facilities and delivered from waste management companies.

STEP 2

Digest

The waste is deposited into a digester that extracts and captures methane gas from within.

STEP 2

Digest

The waste is deposited into a digester that extracts and captures methane gas from within.

STEP 3

Distribute

The methane is then separated, cleaned, and compressed into renewable natural gas (RNG) for use by area residents for home heating and power.

STEP 4

Re-use

The remaining solids are converted into organic fertilizer or compost. Recaptured water is returned directly to the farm or site on which the digester is located for reuse.

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