Wastewater lagoons
Nitrogen in the lagoons was high enough to block land application, and a grease layer was suspected of standing in the way of nitrification.
reduction in total Kjeldahl nitrogen against an untreated lagoon
01The plant
A 0.75 MGD food processing works with two holding lagoons running in parallel.
02Before
Nitrogen in the lagoons was high enough to bottleneck land irrigation — the works could not apply enough water to keep up. Accumulated fats and grease were suspected of holding back nitrification.
03Treatment
One large opening dose to lagoon B in early summer, then weekly doses through to September. Lagoon A was left untreated.
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
The opening quantity was set against lagoon volume, with weekly doses after it.
05Method
Total Kjeldahl nitrogen, ammonia, nitrite, nitrate and grease measured in both lagoons across three months — the same panel, at the same times, in the treated and the untreated one.
06Comparison
Lagoon A ran untreated alongside for the whole period and was measured on the same panel. This is the strongest record in the library: two parallel lagoons at one works, one treated, both measured, and the figure quoted as the difference between them rather than as a before-and-after.
07Outcome
Accumulated grease and solids came down within about a week of the opening dose, and the irrigation bottleneck eased as nitrogen fell.
At the start
Nitrogen high enough to limit land application; accumulated grease in both lagoons.
At the close
76 per cent less total Kjeldahl nitrogen and 74 per cent less ammonia in the treated lagoon than the untreated one, with nitrate up from 0.3 to 7.9 mg/L.
08Limits
The two lagoons are described as parallel but their loadings are not published, so how alike they were at the start is unverified. Rising nitrate indicates nitrification recovering rather than nitrogen leaving the system. This is a liquid-line result and no dry product can deliver it — see the note on the record.
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.
Nitrifying organisms do not survive drying, so nothing in SediLogic's dry range can be expected to reproduce this. A nitrogen or ammonia permit is not a duty the launch products address, and this record is published as part of the field record rather than as an offer.
—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.
