(No) Legionella in exhaust air treatment plants

Background and Objective

In order to reduce the emissions of odor, gases and dust from animal houses in agriculture, various air scrubbers and biofilters are used. In a pilot study, genes from the pathogenic bacterium Legionella pneumophila were found in a biological air scrubber, but not living cells (Walser et al., 2016). The question therefore arises as to whether Legionella can be found in certain types of exhaust air treatment plants and can also be released into the environment.

Approach

In this project, the process water of 10 suitably tested and properly operated biological air treatment plants at livestock houses is examined with different methods on Legionella. So the health risk can be estimated.