inDENSE®
Hydrocyclone Wasting

Using gravimetric sludge selection on conventional activated sludge (CAS) systems increases throughput, improves settling rates and promotes enhanced biological phosphorus removal (EBPR).

Our inDENSE® technology optimizes the performance of your CAS and clarifiers by offering a more stable operation while saving money.

Safe and Optimized Performance

Better Separation

As a gravimetric selection technology, inDENSE retains denser biomass while the lighter fraction of the mixed liquor suspended solids (MLSS) flows out as waste activated sludge (WAS). Promoting higher densities improves sludge settling characteristics, preventing the loss of biomass and other treatment disruptions — especially during wet and cold weather events.

An Optimized Design

Promoting faster settling particles, optimized process configurations and physical selective forces encourage densified sludge formation. Hydrocyclones force denser flocs and solids to the cyclone walls and down through the underflow to be recycled, while lighter solids move toward the cyclone center and are pushed upwards through the overflow to be wasted.

By implementing external mechanisms for selective sludge wasting and optimized biological process configuration, facilities can streamline their operations at the lowest capital cost.

Enhanced Sludge Properties

Promotes denser sludge selection
Minimizes sludge loss

Improved Water Quality

Enhances nitrogen and phosphorus removal
Addresses poor settling of mixed liquor suspended solids (MLSS)

Operational Benefits

Reduces or eliminates chemical requirements
Easily integrates into any existing plant
Promotes a rapid return on investment
Offers operational stability
Improve sludge volume index (SVI)

inDENSE™ Gravimetric Selection Technology

Case Studies

Ephrata Borough Authority WRRF
Ephrata Borough Authority WRRF, located in the MidAtlantic region of the United States, has been battling chronic sludge settling issues since undergoing a BNR upgrade in 2011 to meet new permit limits. During the winter months, SVI values have reached as high as 300 mL/g.
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City of Pueblo, CO USA
The city of Pueblo, CO, is located at the confluence of the Arkansas River and Fountain Creek in South Central Colorado. Aside from its scenic beauty, Pueblo is also home to the James R. Dilorio Water Reclamation Facility (WRF), treating up to 15.7 MGD of wastewater generated by the city and surrounding districts.
Read More
Ephrata Borough Authority WRRF
Ephrata Borough Authority WRRF, located in the MidAtlantic region of the United States, has been battling chronic sludge settling issues since undergoing a BNR upgrade in 2011 to meet new permit limits. During the winter months, SVI values have reached as high as 300 mL/g.
Read More
City of Pueblo, CO USA
The city of Pueblo, CO, is located at the confluence of the Arkansas River and Fountain Creek in South Central Colorado. Aside from its scenic beauty, Pueblo is also home to the James R. Dilorio Water Reclamation Facility (WRF), treating up to 15.7 MGD of wastewater generated by the city and surrounding districts.
Read More
Ephrata Borough Authority WRRF
Ephrata Borough Authority WRRF, located in the MidAtlantic region of the United States, has been battling chronic sludge settling issues since undergoing a BNR upgrade in 2011 to meet new permit limits. During the winter months, SVI values have reached as high as 300 mL/g.
Read More
City of Pueblo, CO USA
The city of Pueblo, CO, is located at the confluence of the Arkansas River and Fountain Creek in South Central Colorado. Aside from its scenic beauty, Pueblo is also home to the James R. Dilorio Water Reclamation Facility (WRF), treating up to 15.7 MGD of wastewater generated by the city and surrounding districts.
Read More

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inDENSE® Hydrocyclone Wasting