Low Phosphorus Demonstration Trial
Andrea Wilson, Severn Trent Water: PRESENTATION ONLY
(free)
- In partnership with Atkins Ltd and Cranfield University, Severn Trent Water is evaluating 6 novel technologies for the removal of phosphorus to below 0.3mgP/L. The 6 technologies, at demonstration scale, will operate in parallel at Packington Sewage Treatment Works near Ashby-de-la-Zouch, Leicestershire. The results will be used to inform Severn Trent Water’s phosphorus treatment strategy in AMP6 and beyond. Two of the technologies are Ion Exchange and an Algae Photo-Bioreactor
- An Ion Exchange system based on adsorption of phosphorus to iron nanoparticles embedded in an ion exchange resin delivers excellent effluent quality (<0.05 mgP/L) with short contact times (1-10 minutes). This technology also permits the recovery of the phosphorus as a high quality marketable product during the regeneration process of the resin.
- Low effluent levels of both phosphorus and ammonium (<0.1 mg/L) is achieved by a high rate photo-bioreactor with immobilised algae in alginate beads. Separation of the algae beads by settling facilitates their harvesting for energy generation by anaerobic digestion and possible nutrient recovery.