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SediLogic Technologies

Industrial pre-treatment

Poultry processing plant, Brazil

A slaughterhouse effluent plant removing barely half the BOD arriving at it, with grease implicated in the shortfall.

86%

reduction in effluent BOD

Field result
Duty
Industrial pre-treatment
Sector
Industrial
Treatment window
90 days
What was counted
BOD and COD, Fats, oils and grease
  • BOD 860 mg/L to 121 mg/L
  • Plant removal efficiency 55 per cent to 86 per cent
Aboveground steel storage tanks at an industrial facility.
Illustration — aboveground tanks at an industrial site, not the plant described on this page.

01The plant

What was being treated

A poultry slaughterhouse in Brazil running 90,000 birds a day, with an effluent works taking 2,250 m³ a day at an eight-day hydraulic retention time.

02Before

How the material got there

On paper the works had enough retention time to meet its discharge targets. In practice it was in biological treatment failure, and the reason was fat. A thick grease cap had formed across the aeration surface and was blocking oxygen transfer into the water beneath it, which starves the biology doing the actual treatment. Effluent BOD sat at 860 mg/L and overall removal efficiency had fallen to 55 per cent.

03Treatment

What was applied, and how

A continuous programme dosed steadily into the treatment train, with no major process change and no new equipment. The target was the grease cap rather than the BOD directly: clear the cap, oxygen transfer returns, and the resident population recovers on its own.

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.

04Method

How the result was established

Effluent BOD and the works' own removal efficiency, before treatment and at ninety days.

05Outcome

What followed

Back into stable compliance without a rebuild, which was the alternative being weighed.

At the start

Effluent BOD 860 mg/L, removal efficiency 55 per cent, grease capping the aeration surface.

At the close

Effluent BOD 121 mg/L, removal efficiency 86 per cent, and the aeration tank carrying the high-strength load without upsets.

06Limits

What this record does not establish.

Eighty-six per cent is a BOD reduction, not a solids reduction, and the two are not interchangeable. No grease concentration is published at either end, so the mechanism the whole account rests on — cap gone, oxygen transfer restored — is described rather than shown. Nothing was left untreated. Ninety days at a slaughterhouse covers whatever the kill floor was doing over the same period, and none of that is recorded.

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

For this duty, in our range.

SediLogic Liquid is the article in the range that reaches this — a concentrate for systems a solid cannot be dosed into, which covers most of what sits upstream of an industrial outfall. Where the target is instead an accumulated blanket in a holding basin, the sinking solids are the right format and the lagoon products apply.

SediLogic holds a written dose table for wastewater lagoons and for no other duty. Industrial loads are also the least alike of anything on this site — a rate set for one plant's effluent means very little at the next — so a quantity here is settled with a person, against your own stream.

Talk to us about a pre-treatment stream

—Read next

The same duty, measured somewhere else.

  • Industrial pre-treatment

    Coking plant effluent treatment

    IndustrialWeeks

    29 to 86%

    ammonia removal

    Field resultConfounded

    A nitrifying population that would not establish itself, leaving ammonia removal at less than a third of what the permit assumed.

    • COD removal reported as improved over the same period

    Nitrifying organisms do not survive drying. No product in SediLogic's dry range addresses an ammonia or total-nitrogen permit, and this record is published as part of the field record rather than as an offer.

    Nitrogen and ammoniaBOD and COD

  • Industrial pre-treatment

    Refinery aeration basin

    IndustrialSustained over 4 years

    $200,000

    a day of loss reported as avoided

    Field resultNo method stated

    Floc that would not form reliably in the basin, with the compliance consequence of losing it measured in the hundreds of thousands of dollars a day.

    • Reported as holding for four years
    Settling

  • Industrial pre-treatment

    Crude refinery, Central America

    Industrial90 days

    68%

    reduction in extractable petroleum hydrocarbons

    Field resultConfounded

    Oily sludge holding extractable petroleum hydrocarbons at a concentration that made disposal the only route available.

    • 29,195 ppm to 9,395 ppm over 90 days
    Hydrocarbons

All field results

Your lagoon next

This was measured somewhere else.

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.

Get a dosing planSee the products