Lakes

Dissolved oxygen is a vital and volatile substance! Oxygen depletion in ponds lakes and fish rearing tanks has serious consequences for fish health. In deep lakes, stratification causes massive volumes of water at lower levels to be dangerously low or devoid of oxygen. Shallow lakes and ponds can be rapidly depleted of oxygen during hot weather. An increase in water temperature promotes an increase in microbial activity, fish will be more active and feed more, these activities consequently increase the demand for oxygen, however as the temperature of water rises the concentration of dissolved oxygen falls. During summer months, and in particular during thundery weather dissolved oxygen can be very quickly reduced to the point where fish are seen gasping in distress at the surface.

There are many products and systems designed to aerate lake water. These range from high-maintenance diffused air/oxygen systems using membranes and complex manifolds layouts to simple floating splashers and rotors. While these systems introduce a certain amount of oxygen into wastewater there is a wide array of effectiveness and efficiency among these methods. The process of oxygenation is a challenging event!

Incomplete oxygenation with high running costs is the norm - expensive installations requiring high-energy input frequently deliver mediocre performance - and in aquatic applications it is difficult to measure efficacy. Although quantifiable
standards are hard to find common logic provides convincing evidence. Check out aeration & oxygenation and consider the review of various approaches below - it could save your fish!

The WMS is a simple device, It takes water from one location, oxygenates it, then moves it to another location. The diagram above shows the circulation pattern, and all this occurs 360º around the WMS. With lakes of differing depths, we can set the WMS to draw water from a fixed depth, to destratify, reoxygenate and distribute treated water over an area up to 200m across.

HOW MUCH ?

Compared to other aeration systems, the compactness of the WMS oxygenator belies it's efficiency.
The ability to treat large volumes of water reliably and at low running costs make the WMS the class leader.
To get the best from this product we need to know some details of the lagoon, pond, lake or pit needing treatment.

Send us details of:
the approximate size shape
and maximum (if known) depth.
Use the contact us form or call our
office in Dereham Norfolk Tel. 01362 683364
Fax 01362 683529

PERFORMANCE DATA O2
Operating within a flow range 5-16m³/hr the 40mm Aquafoil will induce between 1.5- 4.9 m³/hr of air on a constant basis. This performance is achieved with negligible backpressure compared to other methods. In controlled tests over the full range, a pressure loss of 0.19 - 1.55 bars was observed. Circulation systems usually require continuous pump operation. The efficient design of the Aquafoil mechanism reduces back pressure to negligible proportions essentially providing penalty free oxygen to the aquatic system.

Extensive testing in the Fluids Department of Hamburg-Harburg University has shown that the patented 40mm Aquafoil mechanism can transfer oxygen into the water at a rate of 174 grams per hour at 10m³/hr flow rate with 0.56 bar pressure drop. While operational circumstances differ from application to application, this rating outperforms all other aeration devices and compares most favourably with the economics of direct oxygen dosing.

Oxygenation rates vary dependent upon flow, temperature and water chemistry however, in normal operating conditions a single 40mm Aquafoil operating at 10m³/hr flow rate can be expected to provide 4.1 kilograms of oxygen per day, Typically we run the WMS floating island at 15m³/hr giving up to 6.2kg oxygen delivered per 24hr period.