COMRIE WWTP - Secondary Wastewater Treatment in Crieff, Scotland

COMRIE WWTP is a municipal wastewater treatment facility located in Crieff, Perth and Kinross, Scotland. It serves a population of 2,273 and is part of the United Kingdom's wastewater infrastructure, which is regulated under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, a standard requirement for inland freshwater discharges under the directive. The plant has a designed capacity of 2,900 cubic meters per day and an annual discharge volume of 506.05 megalitres. As a secondary treatment plant, it uses biological processes to reduce organic matter and suspended solids before discharging treated effluent. The facility is situated inland, more than 10 km from the coast, and its treated water is discharged into a local watercourse that eventually drains into the River Earn and then the Firth of Tay. The receiving water body supports diverse aquatic life and is part of the Tay catchment, an ecologically important area for salmon and other freshwater species. The plant's operation helps protect downstream water quality and supports the environmental objectives of the Water Framework Directive.

The treated effluent from COMRIE WWTP discharges into a local watercourse that flows into the River Earn, which then enters the Firth of Tay, a major estuary on Scotland's east coast. The Tay catchment supports important salmon fisheries and diverse aquatic habitats. The plant's secondary treatment reduces nutrient and organic loads, helping to maintain good ecological status in the receiving waters as required by the Water Framework Directive.