P-removal by ViroFilter in six-month WRc trials, showing 80%+ removal in parallel, improved by configuring the reactors in series.
Click here to enlarge imageLittle difference in P-removal efficiency at different influent pH (76% versus 80%) was evident, implying no need for influent neutralization. With reactors in series, increased phosphate removal was achieved (-85%).
Final effluent was lower in solids and COD, and improved in color and odor. Operating the reactors in series further enhanced these improvements in effluent quality. The study concluded that ViroFilter systems are suited for tertiary treatment at small wastewater treatment works without chemical dosing but also at larger sites, downstream of chemical dosing to provide polishing to meet strict phosphorus consents.
Virotec’s media has a variety of applications in addition to phosphate removal including elimination of metals from industrial wastewater such as electroplating, tannery, metal refining effluent, and wood treatment waste. In the UK and USA, pilot trials have demonstrated the media’s ability to treat acid mine water drainage. Other applications include soil remediation, removal of arsenic from drinking water, the construction of permeable reactive barriers, and aquaculture pond treatment.
Author’s Note
Simon Tillotson is the general manager of the UK company Virotec Europe Limited. For further information contact the author by email at: [email protected].