Diffused Canal Aerators

Diffused Canal Aerators, aeration for canals from Heathland Aquatic Engineering UK

Diffused canal aerators help promote a healthy ecological balance

At Heathland Aquatic Engineering we believe that diffused aeration systems are the most effective when it comes to increasing dissolved oxygen levels in a canal, as they create full movement of the water column reducing the risk of thermal stratification.

Complete circulation of the water column through the entraining of water

We have a wide range of diffused aeration systems available at Heathland Aquatic Engineering and so we have something to suit any requirements. The diffusers have two different diffuser membrane styles, disc and tube. The tube style diffuser membranes entrain water from 360° around the tube allowing them to reach deeper water while the height of the base of the diffuser prevents them from disturbing the canal bed. The disc style diffuser membranes entrain water from the diffuser membrane up through the water column.

Thermal stratification in Canals - Heathland Aquatic Engineering, Norfolk UK

During the warmer months of the year canals can be affected by thermal stratification, which is the layering of water due to different water densities. The top layer will consist of warm oxygen rich water, whilst the bottom layer is cooler and deprived of oxygen, the transitory section between these two is known as the thermocline and it is the differences in densities here that prevents the bottom and top layers of water from mixing, which causes water quality issues.

Diffused aeration units are designed to pump air through the diffuser membranes which then travels up to the canal surface in the form of millions of tiny bubbles. As these air bubbles travel up through the layers of thermal stratification they will entrain water, this water then becomes naturally oxygenated once it reaches the surface layers of the canal.

This aeration process will create aerobic conditions near the canal base where microbial process can naturally break down nutrients, which would normally be used in the production of algae and noxious aquatic weed. By circulating and aerating from the canal bed the toxic gases, which would normally be trapped under the thermocline layer are released promoting a balanced habitat for aquatic life.

Benefits of using diffused aeration systems within a canal;

  • Increases the breakdown of aquatic water by providing a habitat which is beneficial for aerobic bacteria to flourish.
  • Provides mixing of the water column to break up the layers caused by thermal stratification throughout the water column allowing the entire depth to be oxygenated.
  • Eliminates highs and low in temperatures and oxygen levels throughout the water column
  • Does not cause obstruction to the surface allowing safe passage for boats and wildlife.
  • Operating throughout winter will keep areas of the canal unfrozen allowing toxic gases to escape and access for wildlife.