Landia aerators provide the right mix for Meadow Foods’ dairy effluent process

Meadow Foods, who produce products such as anhydrous milk fat, butter and concentrated skimmed milk, first appointed independent environmental science and engineering consultancy McDonald Stevens Associates (MSA) to review their effluent treatment options. Expert advice was required, especially because of having to meet a demanding consent limit for discharging final wastewater. Previously, when carrying out maintenance, Meadow Foods discovered that the outdated units left large amounts of settled sludge, which greatly reduced the tank’s effectiveness.

Specialists in food and drink effluent treatment, MSA were responsible for the design of the uprated effluent treatment plant, which called for the removal of the outdated units in favour of installing two submersible Landia Air Jets. Designed with a special chopping system of the pump that prevents blocking of the ejector nozzle, the whole process is benefitting from these new aerators.


Landia’s equipment very effectively transfers oxygen into the liquid to start and aid the biological process, cleaning the waste water and keeping solids in suspension for treatment further along the process.

Jerad O’Pray, MSA’s Consultant responsible for the project, commented: “By working closely alongside Meadow Foods and Landia, we have teamed up to bring about a first-class solution. This was demonstrated just recently when during routine maintenance of the balance tank, virtually no solids were evident, and since the re-designed plant has been commissioned, effluent quality has improved significantly”.