Aeration and destratification for drinking-water reservoirs — taste and odour control, thermal mixing, DBP precursor reduction, manganese and iron prevention.
Once the aeration type is chosen, we size and lay out the system through a full, transparent calculation chain — water physics, bubble and plume dynamics, oxygen transfer, module and array sizing, and a final set of validation checks, every number traceable to a peer-reviewed source.
The Full Design MethodologyBefore any device is specified, we characterise the water body and model its oxygen, thermal and biological behaviour from first principles — stratification and stability indices, the hypolimnetic oxygen budget, the thermal-coupling and mixing tests, and the bed-safety constraint. The aeration type — destratification, hypolimnetic oxygenation, surface aeration or a hybrid — is the conclusion of that analysis, not an assumption at the front of it.
Explore Our ProcessDrinking-water reservoirs are the most unforgiving aeration application: the output feeds directly to treatment works where any quality failure is visible to consumers and reportable to the Drinking Water Inspectorate (DWI). Thermal stratification is the root cause of three of the most common reservoir quality problems — hypolimnetic anoxia driving iron and manganese release from sediments, conditions favouring cyanobacterial blooms that produce geosmin and 2-methylisoborneol (2-MIB), and the autumn overturn releasing a pulse of oxygen-depleting, THM-precursor-rich hypolimnetic water into the full column.
Aeration addresses all three by eliminating the thermal gradient before it becomes entrenched. A well-timed spring destratification campaign — deployed when Schmidt stability is still below 50 J/m² — costs far less than the chemical dosing, GAC supplementation, and DWTP upset management that follows a summer cyanobacterial event. The engineering challenge is not whether to aerate but when to start, how much mixing energy to supply, and how to route the changed backwash and blowdown loads that follow improvements to inlet water quality.
From shallow polymictic lowland service reservoirs to deep stratified mountain impoundments and international assets in any climate. We score six quality dimensions at three levels of resolution — year-round strategic, monthly operating, and hour-by-hour diurnal — and benchmark every result against the applicable regulatory framework.
Service reservoirs, raw-water storage impoundments and bankside reservoirs feeding a downstream Water Treatment Works. Assessment benchmarked against DWI, WFD and the applicable national regulatory chain.
Thermally stratified lakes, upland and hydropower headponds where seasonal hypolimnion development drives anoxia, internal phosphorus loading and cold-water quality issues. Applicable for assets from 5 m to > 60 m mean depth.
Applicable worldwide across tropical, subtropical, temperate and cold climates. Where instructed outside the United Kingdom, the equivalent national regulatory framework and climatological inputs are applied in full.
Shallow water bodies under 3 m depth experience rapid oxygen depletion and algal proliferation. Surface aerators and fountain systems provide mixing and oxygenation without deep-water infrastructure.
Sediment oxygen demand, internal phosphorus release potential, cohesive-bed stability and porewater nutrient mobilisation — scored against published thresholds and weighted in the year-round health scorecard.
Dissolved oxygen status at depth — the primary driver of manganese, iron and hydrogen sulphide release from anoxic sediments. Assessed at your actual abstraction depth and across the full water column.
Cyanobacterial bloom risk, geosmin and 2-MIB production potential, and phytoplankton functional-group succession — audited against DWI taste-and-odour standards and WFD ecological status targets.
In-lake nutrient retention, redox-driven internal phosphorus loading, autumn-turnover metal release and nitrogen–phosphorus co-limitation diagnosis — referenced against WFD type-specific thresholds.
Geosmin, manganese, iron and cyanobacterial-risk outputs audited against the applicable national framework — DWI, EA, DEFRA, WFD, or international equivalent — with a clear pass/fail against each standard.
Annual energy demand, carbon footprint, operating regime hours and cost-per-outcome — structured to support an Ofwat AMP / PR technical case, capital programme or equivalent international regulatory filing.
Year-round operating envelope with six-dimension weighted health scorecard, comparison of alternative strategies, energy demand, carbon footprint and full regulatory compliance chain. Defensible for Ofwat AMP / PR business plans and equivalent international submissions.
One independently configurable operating regime per calendar month, with per-month scores across all six health dimensions. Tracks seasonal variation in abstraction rate, catchment nutrient loading and reservoir thermal behaviour through the year.
24-hour resolution per month — surface, mid-column and hypolimnion temperature profiles, daylight and photosynthesis envelope, internal phosphorus redox triggers and nocturnal convective mixing. Identifies peak-risk windows and the precise daily timing of optimal intervention.
Our expertise spans multiple industries with sector-specific water treatment solutions.