Industrial pre-treatment
Phenol in the feed and filamentous growth in the basin, together costing the plant its settling.
a day reported as recovered
01The plant
The effluent works of a refinery and petrochemical plant running 24,600 m³ a day (6.5 MGD).
02Before
Phenol was coming through above 0.3 mg/L, and when it did the plant burned up to five thousand dollars a day of chlorine dioxide oxidising it. The operations team suspected the chemical was costing them the biomass that was supposed to be degrading the phenol in the first place. Suspended solids in the effluent were high as well, and a microscopic examination found heavy filamentous growth bridging the floc, with settling and compaction in the secondary clarifiers gone with it.
03Treatment
The usual answer to filaments is to chlorinate the return activated sludge, and the plant was reluctant for the reason above. What was run instead was that chlorination programme with bioaugmentation alongside it: one blend to strengthen phenol degradation, a second to hold the biomass up while the chlorination did its part.
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.
04Outcome
Settling improved and the works needed fewer chemical additions to run.
At the start
Effluent phenol above 0.3 mg/L on excursions, chlorine dioxide dosed at up to five thousand dollars a day to hold it, and poor settling in the secondary clarifiers.
At the close
Effluent phenol consistently below 0.3 mg/L, and the chlorine dioxide no longer needed.
05Limits
This one is confounded by design and says so: chlorination of the return sludge ran at the same time as the dosing, on purpose, and the two cannot be separated. Two blends went in, not one. The five thousand dollars a day is what the plant had been spending on chemical during excursions, so what is published is a cost avoided rather than a measured reduction in anything. Nothing was left untreated and no plant is named.
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
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.
—Read next
Industrial pre-treatment
IndustrialSustained over 4 years
a day of loss reported as avoided
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.
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.
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.
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.
