Brewing and heron’s aeolipile: what they have in common

1. Step 1. Brewing — uses — Fermentation. Yeast ferments the sugars of the malt.
2. Step 2. Fermentation — is used in — Sewage treatment plant. Activated sludge is microbes.
3. Step 3. Sewage treatment plant — has part — Compressor. Blowers supply oxygen to the microbes.
4. Step 4. Compressor — is part of — Gas turbine. A compressor.
5. Step 5. Gas turbine — has part — Turbine. A turbine.
6. Step 6. Turbine — evolved from — Heron’s aeolipile. The aeolipile is the oldest ancestor of the steam turbine.

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