The inDENSE® technology uses gravimetric sludge selection on conventional activated sludge systems to increase throughput, improve settling rates and promote enhanced biological phosphorus removal (EBPR). By continuously selecting the heavier sludge fraction, settling capacity is improved, resulting in a lower sludge volume index and stable performance without spring spikes. This process also increases bio-P capacity.
The brand "inDENSE" stands for "Process intensification by densified biomass". With inDENSE®, the sludge volume index is permanently reduced, significantly increasing the hydraulic capacity of the treatment plant. The system uses hydrocyclones to select and separate higher-density sludge aggregates, while the light sludge fraction is removed for sludge processing. The underflow contains higher-density biomass that thrives optimally under oxygen-free conditions.

The hydrocyclones are fed with return sludge, with 15-20% of the supply stream recycled to the treatment process. Biological selection is supported by this physical selection in a designated selector zone. This efficient process allows more intensive use of tank volume, which reduces space requirements for new plants and increases the capacity of existing plants. In addition, inDENSE® prevents problems with leaching and accumulation of solids, making it a sustainable and effective solution for wastewater treatment plants.

Benefits of inDENSE^®:

• Better sludge settleability – higher hydraulic load system
• Improved biological phosphate removal
• Low investment
• Very compact system, requires little space
• Easy integration in any existing kind of activated sludge system
• Low energy consumption and no chemical consumption

BIOCOS® - Maximum treatment performance with minimal resources

BIOCOS® technology, BIOlogical COmbined System, offers a smart, sustainable and space-saving solution for biological treatment of wastewater and is a lower-cost alternative to conventional activated sludge systems. Combining the power of activated sludge with the efficiency of granular sludge, this hydraulic system is distinguished by unique sludge selection and a cyclic process, fully controlled by air.

Integration with inDENSE® technology creates a compact, fast-settling biomass that provides excellent nitrogen, phosphorus (Bio-P) and carbon removal. The result? A robust system with high effluent quality, minimal maintenance requirements and up to 25% energy savings.

Why choose BIOCOS®?

• Compact and efficient: Small floor area, rectangular tanks, no pumps or mixers.
• Low energy costs: Smart air-controlled system (airlift), with no moving parts underwater.
• High effluent quality: Biological floc filtration via sludge blanket - perfect for water reuse.
• Improved Bio-P removal: By cyclone-controlled sludge selection in combination with inDENSE®.
• Low maintenance and reliable: No mechanical parts in aeration and sedimentation.
• Space-saving design: Ideal for sites with limited infrastructure.
• Proven technology: More than 150 installations worldwide, from 1,000 to 600,000 PE.

All you need is air.
An innovative technology based on simplicity. Developed at the University of Innsbruck and now successfully applied all over the world.