Wastewater lagoons
A floating crust around a foot and a half thick, stiff enough to interfere with pumping the lagoon down for land application.
reduction in crust thickness
01The plant
A dairy manure lagoon of about 5 million gallons.
02Before
A floating crust around a foot and a half thick had formed over the lagoon, stiff enough to make pumping down for land application difficult.
03Treatment
A single high-strength treatment over four weeks, applied to roughly a third of the lagoon rather than the whole surface.
Every result in this library was measured at an operating plant treating with one of the formulations SediLogic supplies, over the window stated above. It is a field result published as reported, not a controlled trial we ran.
04Sizing
A localised charge against the treated third rather than a rate across the whole lagoon — which is why this record is not a guide to dosing a lagoon of this size.
05Outcome
Pumping for land application was reported as easier once the crust broke down.
At the start
A floating crust roughly 18 inches thick, difficult to pump.
At the close
Crust down to about 2 inches, liquefied enough to pump for land application.
06Limits
Only a third of the lagoon was treated, and the record does not say whether the untreated remainder was measured — so the closest thing here to a comparison was not used as one. No laboratory analysis, no method for measuring crust thickness, and no facility or location are recorded. An 87 per cent reduction in a floating crust is not the same measurement as a reduction in the settled accumulation below it.
Only the volatile organic fraction of a sludge responds to any of this. Grit, sand, silt, mineral precipitates and plastics remain at any dose, here and everywhere else.
—What we would supply
This is the duty SediLogic supplies and sizes. Which article depends on where the material sits: Sedivore Spike is the denser solid and carries down through depth to an established blanket, Sedivore Puck is a smaller unit that spreads a calculated dose across the bed, and SediLogic Maintain is a soluble pouch for load carried in the water column — with Sedivore Polar for that same duty where the water runs cold enough to stall a standard blend.
A quantity for your own lagoon comes from the dosing planner, sized against your dimensions and loading from the manufacturer's written dose method. It does not come from the figure on this page, which was set for a lagoon that is not yours.
—Read next
Wastewater lagoons
Municipal24 weeks
of accumulated solids digested
Just over five feet of accumulated solids in the primary aerated lagoon, assessed at 2,365 dry tons. The plant wanted a route that did not involve dredging.
Wastewater lagoons
MunicipalFive months, May to October
reduction in solids volume overall
Accumulated solids across two lagoon cells, against a specification calling for a 50 per cent reduction. The treatment window was bounded by water temperature, which has to stay above roughly 55°F for the organisms to work at all.
Wastewater lagoons
Municipal3 months
of organic solids digested
Decades of loading had taken the lagoon to a measured 20.5 per cent solids, with a dredging quotation in hand and no budget line to meet it.
Your lagoon next
A different plant, a different loading and a different sludge. What decides your result is how much of your own accumulation is organic and treatable, and whether the dose is sized against the lagoon in front of us rather than read off this page. Tell us the dimensions and we will size it.
