An exhaust air washer for layer houses that is productive and worthy

Pollo L is single-stage chemical exhaust air washer that caters to layer houses. For a large contact surface, it contains a filter element mounted horizontally in the exhaust air tower.

Our air cleaning system is monitored by conductivity sensor and pH meter, to ensure  the process water reaches a pH value of ≤ 3.3, for effectively scrubbing and removing ammonia in the exhaust air. For this, the process water is sprayed onto the packing after being acidified by sulphuric acid automatically.

Ammonia present in the air is firstly dissolved into ammonium ion. The process water which contais sulphate ion, will then react with ammonium ion, and created the stable fertilizer salt called ammonium sulphate, as the end product.


  • Ensures minimal ammonia and dust emissions
  • Easy to access
  • Cost-effective maintenance
  • It has passed the German Agricultural Society’s DLG SignumTest (Test Report 6344)
  • Consumes less energy since it comes with a special pump technology for the rinsing water
  • The fan needs less energy since air resistance is reduced due to the large surface area of the filter element
  • Can be controlled remotely
  • Records all important values using the data logging system


  • Available in different sizes for any barn (built-in) and also in 40-foot containers (module)
  • Modular design - length x 2.40 m x 2.10 m
  • Removal rates of Pollo-L:
    • Ammonia >80%
    • Dust >77%
    • Particulate matter (PM10) >76%
    • Particulate matter (PM2.5) >91%