The Ravensview Water Pollution Control Plant (WPCP) supplies a primary level treatment for waste water for the town of Kingston (including Pittsburg County and the Canadian Armed Force base in Kingston). The existing process at Ravensview WPCP includes a mechanical screening, a ventilated granulation tank, a primary treatment with chemical enhancement, sodium hypochlorite disinfection and a bisulphate sodium dechlorination. Actually, the effluent treated is discharged in the St-Lawrence River.

A study has been done in June 2004 to determine the client's need and to be in conformity with the F-5 provincial requirements (15 mg/L BOD5, 15 mg/L TSS, 0,08 mg/L TP and 5mg/L ammonia) and to anticipate a future growth in the services sector (new average daily flow of 95 000 m3/d and a maximal flow of de 193 000 m3/d, per day). The Biostyr^® biological filter process has been identified as the most efficient for the secondary treatment of the waste water.

To confirm the necessity of a secondary level of waste water treatment at the Ravensview Water Pollution Control Plant and to make the selection of a technology supplier easier, a pilot installation has been set on the WPCP site. Once the pilot project was over, the Biostyr^® process was selected as the best process to offer to Ravensview WPCP.