Industrial pre-treatment
Total petroleum hydrocarbons in a separator at more than two hundred times the discharge limit, with pumping the only route to compliance.
reduction in total petroleum hydrocarbons
01The plant
A municipal oil and water separator of about 200 gallons, taking the effluent of twenty-nine automotive repair garages in Boston.
02Before
Total petroleum hydrocarbons in the effluent measured 22,940 mg/L against a city discharge limit of 100 — more than two hundred times over it. Physical separation could not keep pace with what was arriving, so the separator was pumped out repeatedly at roughly sixteen thousand dollars a year in pumping and disposal, and compliance still did not hold. Adding tanks or enlarging the separator was not on the table.
03Treatment
A hydrocarbon-degrading liquid fed continuously into the separator through a metering pump, so an active population stayed inside the vessel rather than being flushed straight through it. The load was digested in place instead of hauled away.
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
Continuous by metering pump rather than a periodic charge, so that a population is held in a small vessel that is being flushed constantly. The record publishes no quantity and none is inferred here.
05Method
Effluent total petroleum hydrocarbons sampled against the city's 100 mg/L limit, with an interim reading at forty-five days and the closing figure at a hundred and twenty.
06Outcome
Compliance held and the pump-outs largely stopped, which is where the roughly $14,800 a year comes from.
At the start
Effluent TPH 22,940 mg/L, more than two hundred times the 100 mg/L city limit, with repeated pump-outs at about $16,000 a year.
At the close
614 mg/L at forty-five days and 79 mg/L at a hundred and twenty — under the limit and held there — with annual pumping and disposal down to about $1,200.
07Limits
Nothing was left untreated, and a separator taking the flow of twenty-nine independent garages has an input that nobody controlled or recorded across a hundred and twenty days. No hydrocarbon loading figure is published at either end, so a quieter four months at the garages would look identical to a treatment effect. This is a collection-system duty rather than a lagoon, and SediLogic does not sell into 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
Liquid is intended for industrial systems with metered or poured dosing. If the target is settled sludge in a holding basin, discuss a sinking solid and the appropriate application method.
Our written dose tables cover wastewater lagoons. Industrial streams vary considerably, so other applications need a separate review and dose instructions for the specific use.
—Read next
Industrial pre-treatment
Industrial90 days
reduction in extractable petroleum hydrocarbons
Oily sludge holding extractable petroleum hydrocarbons at a concentration that made disposal the only route available.
Industrial pre-treatment
Industrial1 year
reported annual saving on carbon dosing
Organic load being carried by powdered activated carbon, at a cost that rose with every increase in the feed.
Industrial pre-treatment
IndustrialWeeks
ammonia removal
A nitrifying population that would not establish itself, leaving ammonia removal at less than a third of what the permit assumed.
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.
Your lagoon next
This result came from a different plant. Your sludge composition and operating conditions need their own assessment. Send us your lagoon details for a dosing review; do not use the quantity on this page as your application rate.
