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Annual Conference 2018 - training morning & site visit (12th September)

TRAINING MORNING: ‘Introduction to Constructed Wetlands: technologies and application’
In partnership with CIWEM

This interactive training workshop will introduce constructed wetland technologies and their application to domestic, industrial and agricultural wastewater treatment.

It will present the latest technologies and approaches to point source and diffuse discharges to deliver catchment water quality improvements and, through a series of case studies, discuss ongoing management and maintenance requirements and the wider benefits, in addition to water treatment, that can be delivered by constructed wetlands.



On the afternoon of 12th September, delegates will visit two sites near to Portsmouth.

SITE 1: Berewood Major Development Area Sustainable Drainage
Berewood is a new-build township of 2550 units, approximately 12km north of Portsmouth. The site is in the catchment of the River Wallington, which has a history of flooding Wallington Village downstream. Sustainable Drainage Schemes (SuDS) have been integral to the design in order to mitigate flood risk and enhance water quality.
The SuDS features include a treatment train of enhanced swales, linear detention basins, ponds and wetlands, with areas of porous paving, underground storage tanks and vortex separators. There is also a river restoration programme for a highly modified tributary of the River Wallington.  Various green corridors and wildlife areas have been included in the master plan to enhance biodiversity in the development.
The effect of the SuDS have been studied by Portsmouth University in collaboration with the SuDS designer Mayer Brown Ltd and are included in the Wildfowl and Wetlands Trust’s Working Wetlands directory.

SITE 2: University of Portsmouth Environmental Technology Field Station
This field station is at a Southern Water operational wastewater treatment works at Petersfield, approximately 20 miles north of Portsmouth. 
It is a conventional trickling filter works with an ARM Forced Bed Aeration Constructed Wetland for tertiary treatment.  The site visit will involve a tour of the sewage works and the University facilities.
The University has onsite laboratories and a greenhouse.  It hosts a collaborative Innovation Hub between the University and Southern Water as well as other projects.  This site has hosted many studies of constructed wetlands for a range of applications.  Ongoing activities of interest to the CWA include:
- Simulation of pollutant transport in swales in a 10m greenhouse swale
- Field scale studies of reactive media for phosphorus removal that will be scaled up to a full scale site study at a local site later in the year.