ASPAL™ Sludge has been designed to reduce waste sludge at the source, where it is generated in the activated sludge treatment bio-basin. The system is based on a partial ozone treatment of the recycled activated sludge (RAS) and can reduce biosolid waste by 40%-70%. The system is offered on a turnkey basis with an oxygen tank, ozonation system and ozone contactor.
A portion of the RAS from the activated sludge treatment plant is sent to an ozone contactor where ozone, a powerful oxidizing agent, is dissolved in water to oxidize soluble organic or particulate matter.
Some of the the biomass is also oxidized (killed) in the process and metabolized/ solubilized within the bio-basin (cell lysis) to become food for the remaining biomass.
The ozone is produced on-site from oxygen at a 10%-12% weight concentration and fed into the ozone contactor. The remaining oxygen from this process is recovered and sent back into the bio-basin for further oxygenation.
Air Liquide teams, drawing on years of expertise in wastewater treatment, have developed an innovative sludge reduction solution that improves sludge settling, reduces foaming, odors and volatile organic compound (VOC) emissions.
This solution contains all that you need: process know-how, industrial gases and innovative equipment.