The Orhei Constructed Wetland treatment plant, the biggest secondary treatment entirely based on CWs in the world

Client: Vallø  Municipality

Location:Strøby Ladeplads, Denmark

 

Established: 1998

Number of basins: 8

Sludge type: Activated sludge

Sludge volume per year: 300

PE, amount: 9000

 

Client: Northumbrian Water
Location: Hanningfield, UK
Established: 2012
Project period: 2010-2012
Number of basins: 16
Sludge type: Water works sludge
Sludge production: 1,275 tonnes DS/year
PE, amount: 1.5 - 2.0 million
Construction costs: approxiamtely 6 million £

One of the largest and most efficient wastewater treatment plant with french system reed bed filter in France.

Nominal capacity : 4000 p.e. with an extension to 6000 p.e. 

Mayfield: A 2.1 hectare, 12  bed aerated horizontal system treating airport run off contaminated with glycol based antifreeze.

Client: Kolding Municipality

Location:Kolding, Denmark

Established: 1998

Number of basins: 13

Sludge type:Activated sludge and digested sludge

Sludge volume: 2,000 tonnes DS/year

PE, amount: 125,000

 

Recirculated vertical flow French system for 800 p.e. with polishing in a "natural" horizontal flow wetland 

Client: Simrishamn Municipality

Location:Simrishamn, Sweden

Established: 1998

Number of basins: 8

Sludge type: Activated sludge

Sludge volume per year: 450

PE, amount: 25,000

Vertical flow reed bed filter (French system) followed by a trickling filter and a treatment with apatite treat the pollution of raw domestic sewage. Capacity : 1500 p.e. Vegetated effluent discharge area before final reject into the small river "Merderic".

Bezannes : a 8000 m² artificial pond plus 3500 m² of reed bed filters and 1600 m² of wetlands were created to treat stormwater runoff from a large non-residential area.