Vinegar production plants

Dual Stage Exhaust air scrubber
Dual Stage Exhaust air scrubber

Dual Stage Exhaust Air Scrubber

Cetotec dual stage exhaust air scrubbers offer, especially for larger vinegar fermenters and quantities of exhaust air, the ideal solution for cleaning the air and recovering valuable resources at the same time.


The compact design of the absorber column and absorber reservoir is equipped with a reliable automation system. The exhaust air, consisting of Ethanol and acetic acid is transported through the absorber column and thereby cleaned. By using a dual-stage exhaust air scrubber, the exhaust air is passed through two washing columns in succession, thereby increasing the recovery of volatiles to up to 98-99%.


The exhaust air scrubber functions on the basis of physical absorption. The resources contained in the exhaust air are washed out of the gas phase and gathered within the washing liquid. The special design of the filling material within the absorber column guarantees a very high surface and therefore leads to an optimal mass transfer during the cleaning. The washing liquid can be used for mash preparation or dosed back into the vinegar fermenter. In case of using the fed-batch process the liquid can be dosed into the fermenter during charge phase.


  • Recovery of 98-99% of resources in exhaust air
  • Reduction of emissions to less than 50 ppm
  • Minimization of odor emissions in residential areas
  • Droplet separator reliably prevents the outlet of acetic droplets
  • Construction completely from stainless steel
  • Suitable for both inside and outside installation

Available sizes:

Standard sizes: 300 – 4000 m3 / h air volume.
Exhaust air scrubbers can be constructed based on customer requirements and tailored to local specifications.