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Bobbingworth: A 560m2, surface flow reed bed treating 30m3/d of iron loaded landfill leachate 

Additional Info

  • In operation since: 2007
  • Type of wastewater treated: Industrial: other
  • Type of wastewater (other): Landfill Leachate
  • Hydraulic load: 30 m³/day
  • Organic load (PE): N/A
  • Organic design load (kg BOD/day): N/A
  • Location: Bobbingworth, Essex, UK
  • Client: Local Council
  • Stage 1 type: Free water surface flow
  • Stage 1 surface area (m²): 560
  • Cost: £161,000.00
  • Needs:

    Bobbingworth landfill is a capped landfill site in Essex operated by Veolia Environmental Services. Following the capping and landscaping of the site Veolia required a means of treating leachate which was accumulating within the landfill and being pumped to the surface at an average rate of 30 m3/d. This leachate was being tankered away for treatment and disposal at a different location at cost to the operator. A water treatment works situated a few hundred metres away could accept this leachate if the Iron loading was reduced from 100 mg/l to below 20 mg/l and any soluble methane removed. 

  • Solution:

    Once pumped to the surface the Iron within the leachate was primarily in its oxidised or ferric state as an insoluble precipitate. There was also some Iron in its ferrous or soluble form. The wetland solution was a passive horizontal surface flow reed bed using Typha latifolia with a process area of approximately 560m2. The surface flow system would allow the precipitated iron to spread and settle over the whole bed avoiding clogging along the leading edge of the system. The surface flow provides additional oxygenation of the leachate converting any insoluble ferrous Iron into precipitated ferric form. Typha latifolia provides a bulky rhizome and stem suited to knocking down suspended solids in the effluent stream. Methane strippers were supplied by others but installed by ARM Ltd.

  • Benefits:

    The installation of the wetland system provided a robust treatment solution with a low maintenance requirement minimising the need for operator attendance on site. The costs associated with tankering leachate away were eliminated and delivery to the local wastewater treatment works provided security of ongoing treatment for Veolia without the concern of tight consent achievement and discharge into the local environment.

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7/11  9am  Anacleto Rizzo   (Keynote)

Wetland community expertise in the new Nature-Based Solution and Circular Economy vision: links and new research and design trends


7/11  10.40am  Dion van Oirschot

MULTISOURCE: Aerated wetland treating black and grey water for reuse at campsite Belgium


07/11   11:40am  Heike Hoffman

The potential of the French Wetland System for reuse - Results of a long-term project in the Peruvian arid coast area


7/11  4pm Heike Hoffman

Operational experiences with a sludge treatment wetland as part of a municipal WWTP in Brazil


7/11  4.30pm Fabio Masi

Water Projects Europe: NICE / MULTISOURCE


9/11  2pm Steen Nielsen

Treatment of industrial sludge in a pilot Sludge Treatment Wetland planted with Phragmites australis and Schenoplectus californicus


9/11  2pm Riccardo Bresciani

Reed beds for drying sludge from a winery wastewater treatment plant in Spain: the WETWINE project


9/11   4.40pm  Taxiarchis Seintos

Application of a full-scale UASB and two-stage constructed wetland system for water reclamation and nutrient recycling of domestic wastewater in arid areas


9/11  5pm Simos Malamis

Investigation of the use of different filling materials in unsaturated vertical flow constructed wetlands for the treatment of UASB effluent from domestic wastewater

T. Seintos, E. Statiris, F. Masi, C. Noutsopoulos, S. Malamis


9/11 5pm Scott Wallace

Practical aspects in the determination of first-order removal rate coefficients (k) for horizontal flow treatment wetlands


10/11 11.20am Fabio Masi

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10/11 2.20pm Alain Petitjean

Intensified French Treatment Wetlands - Influence of operating parameters on nitrogen removal


10/11 4pm  Andy Freeman

Treatment of de-icer contaminated runoff at a UK airport using intensified Nature Based Solutions - A 10-year operational performance review



P4: Coupling French Reed Bed and Short Rotation Plantation for developing circular economy of wastewater in India: A case of PAVITR prototype / Anacleto Rizzo

P39: Constructed wetlands for the treatment of combined sewer overflow upstream of centralised wastewater treatment plants / Chiara Sarti