Enhanced biological treatment retrofit helps Sherborne achieve compliance

WPL’s Hybrid-SAF technology comprises a submerged moving-bed, fixed-film reactor. It can treat wastewater in a more sustainable and cost-effective process than traditional submerged aerated filters (SAFs). Offsite manufacture of the modular process technology cells in a quality-controlled environment means that the onsite project delivery time is a couple of days, rather than a possible 12...

Getting in early on the project and meeting the end-user face-to-face and onsite meant WPL was able to fully understand the objectives of the client. The full scope of the project – including everything from the type of media installed in the biozone to the logistics of restricted access to this rural site – could be considered in designing the optimum solution.

Water quality data from the first year of operation shows that discharge from the plant is well within the UK Environment Agency’s permit. Ammonia levels in the discharge effluent are below the level of detection on a consent of 10 milligrams per liter (mg/l). Parameters on biological oxygen demand, turbidity, and temperature have also been met.

Andrew Baird is the technical director at WPL Ltd., based in Waterlooville, Hampshire, United Kingdom.