About us
- Water pollution
- Biofouling
- Biofilm removal
- Phosphate removal

- Reverse osmosis
- Reservoir souring
- Bacterial contamination
- Arsenic

Phosphate in water

Together with carbon and nitrogen, phosphate is a key nutrient for living organisms. Indeed, phosphate groups are part of the backbone of nucleic acids. Besides, phosphorous is an essential element in the formation of phospholipids, a major component of all cell membranes. Even in low concentrations, the presence of phosphate in feedwater is sufficient to trigger bacterial growth and biofilm formation (biofouling) in water treatment systems. Therefore, the presence of phosphate in feedwater, through biofouling, leads to a number of well-known operational issues during the process of water treatment.

Known negative effects of biofouling in water treatment systems are:

Another negative effect of phosphate in water is eutrophication of surface water. This problem is caused by the discharge of phosphate-rich water from Wastewater Treatment Plants (WWTP’s). Eutrophication can cause the excessive growth of algae and can deprive surface waters from oxygen, causing the death of water fauna and flora. To prevent eutrophication, WWTP’s must meet stringent phosphate discharge limits.

Phosphate removal from water

To prevent bacterial growth and biofilm formation during water treatment, it is important to deprive bacteria from possible nutrients. By reducing phosphate levels to below 1-2 ppb, bacterial growth is inhibited. However, state-of-the-art technologies (e.g. chemical precipitation, and adsorption) are not able to reach these sufficiently low levels of phosphate.

BiAqua PRT™ for water treatment systems

BiAqua Phosphate Removal Technology (PRT™) is the first solution that consistently achieves concentrations of phosphate in water below 1 ppb. Both laboratory tests and pilot tests have demonstrated that at such low levels, bacterial growth is almost completely halted. Therefore, BiAqua PRT™ is the ideal solution to prevent both eutrophication and the negative effects from biofouling.

Phosphate removal with BiAqua PRT

Inspired by nature, BiAqua developed BiAqua PRT™, a range of bio-based, environmentally friendly materials that capture phosphate in water and allow its release in a controlled way. All our adsorbent materials are regenerable and can be retrofit in standard filtration units before membrane elements or as stand-alone solution in large water treatment plants.

Contact us for information about how BiAqua PRT™ can be applied to your specific needs and for an indication of the reduction in operational costs when you start using BiAqua PRT™.


2 28-05-2015 Vacancy: Process Field Engineer


2 20-08-2014 BiAqua featured in Water Desalination Report.

2 13-08-2014 BiAqua appoints OrangeBoat as technology ambassador.

2 13-06-2014 BiAqua’s founding father awarded the 2014 NWO Spinoza prize

2 23-05-2014 BiAqua’s first pilot-test results gain recognition at the EDS conference Cyprus

2 6-11-2013 BiAqua’s technology preventing biofouling in pilot at WLN

2 29-10-2013 BiAqua’s solution against biofouling and phosphate contamination will be launched at Aquatech 2013

2 29-10-2013 BiAqua technology proves able to guarantee 10x delay in biofouling appearance when applied to RO membranes pretreatment

2 14-10-2013 BiAqua will be present at Aquatech 2013

2 30-9-2013 BiAqua and Eucodis bioscience scale up enzyme production

2 6-9-2013 BiAqua and WLN form partnership to develop PRT technology

2 13-9-2012 BiAqua in Artemis top 50!

2 1-7-2012 Visit BiAqua at the SIWW'2012

2 7-05-12 BiAqua presents at DSM Webinar on outsourcing development for industry ingredients

2 29-03-12 BiAqua founding father wins Lee Kuan Yew Water prize

2 15-03-11 Biaqua Ferritin validated for its adsorption capacity to remove > 99.95% of 32P (i.e. < 1 ppb)

2 31-08-09 Icos Capital invests in TU Delft water spin-off

5 31-08-09 Icos Capital investeert in watervinding TU Delft