• How does Hydro utilise less power in wastewater treatment plants?
How does Hydro utilise less power in wastewater treatment plants?

Whether comparing with dissolved air flotation (DAF) systems or aerobic digestion, Hydro2050 can offer efficiency and energy savings.   Conventional technology involves forcing large bubbles into the treatment water column, continually fighting the buoyancy of bubbles escaping to the surface. 

Ultrafine bubble technology offers some distinct advantages over convention methods in the following ways:

  • As ultra-fine bubbles stay suspended in the water column rather than floating to the surface, there is a lower power requirement to inject DAF into a water column.
  • Ultrafine bubbles carry a negative charge.  This results in repulsion in the bubble stream, which then diffuses through the wastewater being treated.
  • The negative charge has an electrostatic attraction to positively – charged suspended solids.  This causes a mass of tiny bubbles to accumulate around waste particles, floating them to the surface.
  • As the bubbles can also carry oxygen and ozone, there are benefits in using oxygenation of the whole water column to enhance microbial degradation.  Ozone addition later in waste treatment at the “polishing” end can remove unwanted microbial content prior to discharge.

Previous studies show a reduction in energy requirement of 50% by transferring to ultrafine bubble technology, which translates to an overall reduction of 25% total operating cost for a waste treatment plant.

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