Aerobic Granular Activated Sludge Technology. Granules instead of flocs.

NEREDA® is a highly advanced technology for biological wastewater treatment based on the SBR method, harnessing the power of aerobic granular sludge. With this technology, bacteria naturally grow in compact granules instead of in flocs.

These granules have excellent settling properties, offering numerous advantages: the biomass concentration in the reactor is very high, but the sedimentation phase is extremely short. Moreover, the reactor can be filled while clear water is being extracted. This results in excellent biological performance, allowing virtually all of the cycle time to be spent on biological processes, leading to small reactors with minimal space requirements. Another key factor is that many biological processes take place within the compact granules simultaneously. This results in high rates of nitrogen and biological phosphorus removal, largely eliminating the need for precipitating agents.

Compared to conventional SBR technology, these systems are much more compact overall and produce a better quality of effluent.

Key Features 

• Small footprint: Compact plants with minimal space requirements (around 50% compared to SBR).
• Flexibility of a batch process (SBR).
• Excellent effluent quality. High rates of biological nutrient removal.
• Easy to operate & Cost-effective: A proven and robust process with minimal consumption of resources (energy, chemicals) characterized by its ease of operation.