Cut aeration energy in lagoons and industrial basins
Aeration can reach up to ~60% of a plant's electricity bill, and coarse-bubble, mechanical and lagoon systems transfer a small fraction of the oxygen they pay for. That is where ultrafine bubbles win outright: we add oxygen on a side-stream loop, and your existing aeration keeps mixing the basin.
(vs. ~15% for standard aerators · published research)
(Lower disposal cost · published research)
(Side-stream loop · existing aeration keeps running)
You are paying to pump air into the sky
Standard aeration bubbles rise and burst at the surface before the oxygen dissolves, so you pay for oxygen that leaves with the bubble. Meanwhile sludge piles up and the neighbors complain about the smell.
Bubbles that persist and work
Ultrafine bubbles persist far longer than coarse bubbles, so more of the oxygen dissolves before the bubble reaches the surface. In published research that regime transferred >85% of the injected oxygen against ~15% for standard aerators and cut sludge volume by up to 40%. Transfer efficiency is a delivery figure, not an energy saving, so the calculator costs the power on both sides.
Where it wins
Lagoons
Surface aerators and under-aerated zones leave much of a lagoon short of dissolved oxygen. A side-stream loop adds oxygen where the lagoon runs short, and your existing aerators keep mixing. The lagoon is not rebuilt.
Coarse-bubble and mechanical aeration
Coarse bubbles and mechanical aerators lose oxygen at the surface. The calculator costs your blowers after alpha, fouling and temperature derating, against our concentrators plus the circulation pump, in kWh per kg of oxygen transferred.
High-strength industrial pretreatment
Pretreatment basins with a high oxygen demand per cubic meter are where oxygen supply limits the process. Where energy alone does not carry the case, sludge sometimes does: up to 40% less in published research, to be confirmed on your water.
Find out whether our oxygen is actually cheaper than yours
The calculator costs both sides in kilowatt-hours per kilogram of oxygen actually transferred: your blowers after alpha, fouling and temperature derating, against our concentrators plus the circulation pump. It tells you when we lose. Where energy does not carry the case, sludge, odor and permit headroom sometimes do.
Estimate my ROIEngineer? Ask for the submittal pack
Tell us the basin, the flow and the oxygen duty. We compile the pack for the unit we propose and send it with the proposal. It is a request, not a download.
- DatasheetsInjector, PSA oxygen concentrator and dissolved-oxygen meter. The public datasheets are online: injector, oxygen concentrator, DO meter.
- DimensionsFootprint and connection sizes for the unit we size for your basin.
- MaterialsInjector core titanium; piping PVC Sch 40/80 or 316 stainless, chosen from your water; Viton gaskets.
- ElectricalA dedicated GFCI-protected circuit, commonly about 220 V / 30 A (exact spec in the proposal).
- O&M outlineInjectors have no moving parts; pumps and oxygen generators are serviced every six months.
- Warranty3 years on non-moving parts (piping, injectors, cavitators); 1 year on moving parts (pump, oxygen generator).
- InstallTies into existing piping in 1–3 days; hours of interruption on the treated line, not days.
- Lead time4–6 weeks from down payment to hardware on site.
What buyers in wastewater ask before a pilot
Will it beat my fine-bubble diffuser grid on energy?
Often not, and the calculator will say so. It costs both sides in kilowatt-hours per kilogram of oxygen actually transferred: your blowers after alpha, fouling, temperature and dissolved-oxygen deficit, against our concentrators plus the circulation pump. On a well-run fine-bubble municipal plant our side is the dearer one; the energy case holds for coarse-bubble, mechanical, lagoon and high-strength industrial basins.
Where does it install?
On a side-stream loop: a circulation pump carries water through the injector and back into the basin, and the flow follows from the oxygen duty and how much each pass adds. The system supplies a share of your oxygen demand alongside your existing aeration, which keeps running to mix the basin. The proposal names the tie-in point. It ties into existing piping in 1–3 days, with hours of interruption on the treated line, not days.
What if energy doesn't carry the case?
Then sludge, odor and permit headroom sometimes do. In published research, ultrafine-bubble aeration cut sludge volume by up to 40%. Whether that holds in your basin depends on flow, dose and passes, so it is tested on your water in a pilot. The calculator scales each of those levers by the share of oxygen demand we actually supply: you cannot claim an effect on water the system didn't treat.
Can we pilot on one basin or one train?
Yes. One basin or train is treated and a comparable one runs as control, with your baseline captured first and the success criteria agreed in writing before anything ships. Readings are reviewed with you at agreed checkpoints, and the written results report shows baseline against treated, with the economics. If the difference isn't there, you stop and keep the data. Pilot fees can credit toward the full system, up to 100% on structured trials. How a pilot works.
How long from order to a running system, and how do we buy?
Lead time is 4–6 weeks from down payment to hardware on site, and installation usually takes one to three days. You can buy direct from Kairospace, through a dealer near you (where to buy), or lease-to-own (3–4 month terms, lease fees credited toward the purchase). Warranty is 3 years on non-moving parts and 1 year on moving parts.
Beyond aeration: what the research reports
Figures are from published studies unless marked KST field data. Results depend on flow, dose and passes, so each one is tested on your water before it is a promise.
Aeration is the biggest line item in your budget
- Membranes (MBR, RO, FO)In published forward-osmosis work, ultrafine bubbles cut flux decline over 24 hours to a fraction of the untreated rate. Dayarathne et al., 2019 Zhang et al., 2023
- OdorOzone ultrafine bubbles oxidize hydrogen sulfide and VOCs on contact. That is the mechanism; we quote no odor-complaint result.
- SludgeCavitation cut sludge particle size sharply and improved solubilization; ultrafine-bubble aeration raised cell lysis and lowered net sludge production. Xiao & Xu, 2020 Kim et al., 2020
- MetalsUltrafine bubbles accelerated lead adsorption onto activated carbon, and oxygen ultrafine bubbles supported arsenic oxidation and removal. Han et al., 2022 Kyzas et al., 2019
- Disinfection by-productsOzone ultrafine bubbles inactivated E. coli within minutes without the chlorinated by-products that chlorine leaves behind. Batagoda & Meegoda, 2019 Song et al., 2022
- Persistent pollutantsHydrodynamic cavitation combined with ozone removed far more COD than cavitation alone in textile wastewater. Mohod et al., 2023 Wang et al., 2022
- AmmoniaPure-oxygen ultrafine bubbles removed 62–83% of ammonia within 45 minutes; combined cavitation-oxidation cut nitrogen compounds in refinery wastewater. Lyu et al., 2023 Yaparatne et al., 2024
- Greenhouse gasesUltrafine-bubble aeration cut cumulative N₂O emissions in published work. Jannesari & English, 2024 Baram et al., 2021