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Ethanol Recovery System

Traditional ethanol scrubbing methods consume high amounts of water and continously recycle recovered  ethanol (~ 4% v/v in scrubber bottoms) to be lost (vented) in upstream processes. Using a Haffmans Ethanol Recovery System - ERS, ethanol, water vapor  and potential heat entrained in the fermentation gas is recovered more efficiently. 


  • Low ROI: as low as 1 year
  • Water savings:  up to 80% reduced water consumption
  • High ethanol content: up to 15% vol/vol in scrubber bottom
  • Retrofittable: Easy integration for quick start-up, low down time
  • Potential heat recovery : Preheat utility streams
  • Low pressure drop: as low as 8 inch (200 mm) WC

Functional Description

The Ethanol Recovery System is a cost-effective, proven technology using a counter flow water wash system to remove ethanol from vented gas. The application of structured stainless steel packing ensures an efficient gas-water contact time and a minimal pressure drop. By re-circulating chilled scrub water over the packing, ethanol is concentrated up to 15% v/v with reduced water consumption. The recovered ethanol is concentrated up to 15% v/v so that scrubber bottoms are pumped directly to the beerwell feeding the distillation columns (instead of recycling it back to upstream processes) thus breaking the ethanol loop.

Fields of application

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Pentair Haffmans Ethanol Recovery Systems & Gas Scrubbers operate successfully in many parts of the world in industries such as: 

- Bioethanol
- Distilling
- Brewing
- Wine
- Cider

The Ethanol Recovery System is integrated in the gas collection line downstream of the fermenters, upstream of existing gas scrubbers.

Whether the site situation requires a complete gas scrubber, a replacement, a retrofit or expansion, Pentair Haffmans provides a suitable Ethanol Recovery solution.



Product leaflet
Haffmans Ethanol Recovery System
Haffmans Ethanol Recovery
Case Study
Jack Daniel's Distilling Company
Technical documentation
Looking for operating instructions, installation manual, spare part list etc.?

Download PDF

Product leaflet
Ethanol Recovery System - ERS | Haffmans - leaflet
Ethanol Recovery System - ERS | Haffmans - leaflet
Case Study
Jack Daniel
Technical documentation
Please, send us your request


Ethanol Recovery System - Jack Daniel



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