Cold-weather nitrification · UltraClear® Nitrifying Concentrate
Keep nitrifying when the basin gets cold.
Nitrifier growth drops as temperatures fall, and many plants lose nitrification until spring. A maintenance dose of live Nitrosomonas and Nitrobacter helps carry you through. Get a free winter dosing plan and price, with a reply within 1 business day.
Proof from an upset recovery: A food processor cut effluent ammonia from about 10 to 0.05 mg/L in days, with no permit violations. See the case
30+ years in biological water treatment · Packed in Garfield Heights, Ohio
Get your free winter dosing plan and price.
- A dosing regimen sized to your flow and ammonia load
- Pricing for the format that fits: jug, drum or tote
- A reply from a wastewater specialist within 1 business day
Plant upset now? Call 1-800-847-8950
Tell us where to send it
Four quick fields. Prefer to talk? Call 1-800-847-8950.
Hold the population before the cold takes it.
Nitrification is highly temperature-dependent. Supplementing the basin keeps enough working nitrifiers in place to offset their slower rate.
Start before it gets cold
A maintenance dose through the cold months helps hold the population you need while growth slows.
Dose where the oxygen is
Aeration basins, oxidation ditches or the influent of RBCs, at the lowest-flow time of day. Avoid anaerobic zones and primary clarifiers.
Stretch each shipment
The Propagation Kit grows the culture on site to extend treatment capacity between deliveries.
How a food processor recovered from a nitrification failure in days.
The problem
Nitrification suddenly failed and effluent ammonia climbed to about 10 mg/L. The root cause was still unknown.
What they did
They dosed two totes of UltraClear Nitrifying Concentrate already on site, then used the Propagation Kit to carry the biomass until the next shipment arrived.
The result
Effluent ammonia fell from about 10 mg/L to 0.05 mg/L, a drop of about 99.5%.
- During the upset
- ~10 mg/L
- After dosing
- 0.05 mg/L
Values as reported by the facility. Results vary by system.
Reported outcomes
- to restore nitrification, faster than the plant’s past upsets
- Days, not weeks
- to restore nitrification, faster than the plant’s past upsets
- permit violations
- 0
- permit violations
- capital investment
- $0
- capital investment
- product now kept on hand
- Reordered
- product now kept on hand
It worked out really well to help us recover so much quicker… It was good to have these nitrifiers here to start recovery way, way quicker… This has been a really good find for us.”
Questions operators ask before winter.
Why does nitrification fail in winter?
When should I start dosing?
How fast does it start working?
How do I store it in winter?
How much will I need?
Get your free winter dosing plan and price.
- A dosing regimen sized to your flow and ammonia load
- Pricing for the format that fits: jug, drum or tote
- A reply from a wastewater specialist within 1 business day
Plant upset now? Call 1-800-847-8950
Tell us where to send it
Four quick fields. Prefer to talk? Call 1-800-847-8950.

