Food & Drink Processing & Packaging Issue 63 2026 | Page 6

Reducing Downtime in Vegetable Wastewater recirculation Applications

Rotary lobe pumps aren’ t just for moving liquids— they’ re helping vegetable processing plants go green. With water costs rising, more harvested produce is sent to automated processing facilities where wastewater can be efficiently recycled.
Traditionally seasonal vegetables may have been cleaned during collection in fields, however due to increased water and labour costs, operators are increasingly relying on automated plant to undertake this otherwise manual and inefficient process for the washing and packaging of seasonal produce.
Suspended sand, silt and stones are creating havoc with existing wastewater recirculation pumps, as traditionally systems were designed to handle low concentrations of abrasive solids. As processing facilities are having to cope with higher solid content, users are finding that existing pumps are no longer suited for the application at hand.
Premature failure of existing pumps is generally caused due
6 FDPP- www. fdpp. co. uk to 2 reasons. First of all, there is mechanical seal failure due to abrasive solids being transferred at high speeds causing elastomers in seals to be cut and leak. Secondly, pumps are cavitating due to suspended solids settling at pumps inlets causing units to be starved of liquid.
One way to resolve these issues, whilst maintaining high flow rates is to use a rotary lobe pump. These pumps handle the job reliably, keeping water moving smoothly while helping plants save resources and cut costs.
A Rotary Lobe Pump is a positive displacement pump that uses two synchronised, counter-rotating lobes to move fluids, in this case, wastewater. As the lobes rotate, they trap fluid in pockets, draw it into the pump, and then force it out the discharge port as the volume decreases.
These pumps are versatile and extremely effective and are widely used in abrasive applications as they can handle viscous and abrasive liquids without damage to the unit.
They handle everything from thin to thick fluids, even those with suspended solids, can self-prime up to 8M and can pump in either direction for ultimate flexibility. Their steady, non-pulsating flow stays consistent under any pressure, making them perfect for precise processes like filling lines.
At North Ridge Pumps, we don’ t do off-the-shelf. We combine expertise and experience to deliver the perfect pump for your project— built to last and perform. With 25 + years as the UK’ s leading independent manufacturer and distributor of pumps, we know how to tackle any application, anywhere, with reliability you can count on.
For the Right Pump, Every Time visit North Ridge Pumps at www. northridgepumps. com to see how we can help.