Established in 1924, the fourth-generation family-run Roberts business, which is a trusted leader in the prepared food industry, purchased a 146m3 tank (6.8m diameter 4.2m height), which now utilises the externally-mounted 7.5kW Landia AirJet aerator. Effluent temperatures are up to 450oC, with dissolved solids of around 3%. In addition to the AirJet, wastewater is also processed by a DAF plant and treated with polymer.
The AirJet comprises one of Landia’s renowned no-nonsense chopper pumps (Landia invented the chopper pump in 1950). Designed with an external knife system that stops solids from entering the pump’s casing, the pump is fitted with a venturi nozzle to create the AirJet, of which there are thousands in service, worldwide.