EDITOR’S CHOICE
Comprising a Chopper Pump and a venturi nozzle the low-energy AirJet mixes and aerates at Deeside Cereals.
Controlling bad odours from wastewater tanks
Aerating wastewater might be a so- called ‘Secondary Treatment’, but when foul odours create such an unpleasant environment, putting it right is very much a primary concern.
If that stench is also upsetting your neighbours, then you might well find yourselves on the end of environment agency visits, and a wave of unwelcome bad publicity as those in the local area, armed with social media, will be quick to tell the world that:
“It’s been going on for ages!” “None of us can open our windows!”
And that you, the reason behind the foul odours, “Just doesn’t care!”
The offending tank(s) in your effluent treatment process may already have a pump or mixer. And with no shortage of
noise and surface bubbles, there perhaps appears to be plenty of oxygen to feed all the bacteria so that they can biodegrade. But what lies beneath?!
If you’ve reached that point where everyone is having to hold their nose, then there’s a strong likelihood that the tank is not being mixed properly. Accumulated rotting solids will be sitting on the floor of the vessel, generating that awful rotten smell.
To make a sweeping statement, ‘most pumps can deal with most wastewaters’, until hard-to-handle solids come along. As well as foul odours, you’ll be entering a world of pain with blocked pumps, downtime, rising maintenance costs, and possibly an overflowing tank.
Logic would therefore suggest that it is a false economy to buy ‘a standard pump’.
Instead, invest in one that is much tougher, longer-lasting; designed to continuously reduce particle sizes, and doesn’t come to a grinding halt when larger solids inevitably creep into the wastewater process.
A Chopper Pump might well be the solution. Speaking for Landia, who invented the world’s first chopper pump back in 1950, technical sales engineer, Howard Burton has no shortage of success stories to put forward.
“Our chopper pump has a pretty nasty knife system that stops solids from entering the casing,” he said, “so we’re always confident that it can handle tough applications. We use the chopper pump with angled venturi nozzles to create our AirJet system so that the whole tank gets mixed comprehensively.”
Howard pointed to a Landia problem- solving job at the renowned Timothy Taylor’s brewery in North Yorkshire. A survey by wastewater treatment provider, Ogden Water, showed that the pumps used for the brewery’s 45m3 balance tank were not providing enough agitation to adequately keep solids in suspension.
‘Eliminate odours caused by solids not being sufficiently suspended’.
Landia AirJet 34 | July 2025 |
draintraderltd.com
Nick Berkovits, second brewer at Timothy Taylor’s, commented: “Ogden Water’s rigorous survey showed that an upgrade to superior aeration equipment would
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