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RECENT STATE-OF-THE-ART LEACHATE TREATMENT PLANTS IN EASTERN ENGLAND

  • Howard Robinson - Phoenix Engineering, Phoenix House, United Kingdom
  • Kevin Wilson - CEMEX UK Operations Limited, Cemex House, United Kingdom
  • Andy Stokes - Viridor Waste Management, United Kingdom
  • Jonty Olufsen - Phoenix Engineering, Phoenix House, United Kingdom
  • Tim Robinson - Phoenix Engineering, Phoenix House, United Kingdom

DOI 10.31025/2611-4135/2018.13692

Released under CC BY-NC-ND

Copyright: © 2018 CISA Publisher

Abstract

The paper presents detailed design and performance data for two full-scale leachate treatment plants that have been designed and operated in Eastern England during recent years, in which reliable performance has been achieved for an extended period. The first plant is a modified Sequencing Batch Reactor system, treating relatively diluted leachate (COD about 500 mg/l, ammoniacal-N about 180 mg/l) from a closed landfill site, to provide complete nitrification of ammoniacal-N and degradation of all degradable COD, in a manner requiring minimal site attendance. This is made possible by means of reliable and robust operational software, which can run the plant in a completely automated manner, but nevertheless alerts the operator to any issues. The second state-of-the-art leachate treatment plant was designed and built at the Masons Landfill Site in Ipswich. It was designed to treat 160 m3/day of strong methanogenic leachate, often containing more than 2000 mg/l of ammoniacal-N. Discharge of treated leachate is to sewer, under a consent in which the main parameters that are limited are ammoniacal nitrogen, and COD. Treatment comprises full biological nitrification, with ultra-filtration membranes providing additional removal of COD, to achieve challenging consent limits. Taken together, the two case studies provide valuable, robust and real, full-scale data, for the degree of treatment which can realistically be delivered, by well-designed and operated, aerobic biological leachate treatment plants, where each plant has succeeded in treating leachates to well below the consented quality limits for discharge.

Keywords

Editorial History

  • Received: 20 Feb 2018
  • Revised: 15 Jun 2018
  • Accepted: 01 Aug 2018
  • Available online: 06 Sep 2018

References

Construction Industry Research and Information Association (CIRIA) (2014). Containment Systems for the Prevention of Pollution: Secondary, Teriary and Other Measures for Industrial and Commercial Premises. CIRIA Report C736. ISBN 978-0-86017-740-1, 196 pages, dated 2014. Downloadable for free from; https://cdn.shopify.com/s/files/1/0523/8705/files/CIRIA_report_C736_Containment_systems_for_the_prevention_of_pollution.compressed.pdf

Robinson H D, Olufsen J and Last S (2005). Design and operation of cost-effective leachate treatment schemes at UK landfills: Recent case studies. Paper presented to the 2004 Annual Conference and Exhibition of the Chartered Institution of Wastes Management, 15-18 June 2004, Paignton, Torbay, UK. Landfill Workshop, 16 June 2004. Published in the Scientific and Technical Review Journal, CIWM, April 2005, 6, (1), 14-24. Winner of the James Jackson Award of the Chartered Institution of Wastes Management, for the best paper presented to the Institution during the year 2005-2006.

Robinson H and Olufsen S (2007). Full biological treatment of landfill leachate: a detailed case study at Efford Landfill, in the New Forest, Hampshire (UK). Paper presented to Sardinia 2007, the 11th International Waste Management and Landfill Symposium, at Forte Village, S. Margherita di Pula, Cagliari, Italy, 1-5 October 2007, Proceedings page 203 and on CDROM.

Robinson H D and Carville, M S (2008). The treatment of leachates at Malaysian landfill sites. Paper presented to WasteCon 2008, The 19th Waste Management Conference and Exhibition of the Institute of Waste Management of Sothern Africa, held at the International Conference Centre, Durban, South Africa, 6-10 October 2008, In Proceedings, pp 553-565, ISBN 978-0-620-40434-1, pp 553–565.

Robinson H D, Farrow, S, Carville, M S, Gibbs L, Roberts, J and Jones, D (2009). Operation of the UK’s largest leachate treatment plant : 6 years of experience at Arpley Landfill. Paper presented to Sardinia 2009, the 12th International Waste Management and Landfill Symposium, held at S Margherita di Pula, Cagliari, Sardinia, Italy, 5-9 October 2009. In, Proceedings, pp 511–, and on CD ROM.

Robinson H D, Carville M and Robinson T (2013a). Biological nitrification and denitrification of landfill leachates. Paper presented to Sardinia 2013, the 12th International Waste Management and Landfill Symposium, held at S Margherita di Pula, Cagliari, Sardinia, Italy, 30 September - 4 October 2013. In, Proceedings, p XX–, and on CD ROM (18 pages).

Robinson H D, Carville M, Harris G, Steward R, and Robinson T (2013b). Incorporation of ultrafiltration membranes into aerobic biological treatment of landfill leachates. Paper presented to Sardinia 2013, the 14th International Waste Management and Landfill Symposium, held at S Margherita di Pula, Cagliari, Sardinia, Italy, 30 September - 4 October 2013. In, Proceedings, p XX–, and on CD ROM (25 pages).

Robinson T H (2014). Aerobic Biological Treatability Studies on Landfill Leachate using Nitrification and Denitrification. Final Year Dissertation, (Supervisor Professor Kevin Hiscock). School of Environmental Sciences, University of East Anglia (UEA), Norwich, UK. April 2014, 66 pages plus appendices. Available from the UEA Library.

Robinson T, (2017). Robust and reliable treatment of leachate at a closed landfill site in Sussex, UK. Paper presented to Sardinia 2017, the 16th International Waste Management and Landfill Symposium, held at S Margherita di Pula, Cagliari, Sardinia, Italy, 2 - 6 October 2013. In, Proceedings, and on CD ROM (25 pages).

Strachan, LJ, Robinson, HD, Last, SD, Payne, G and Wright, M (2007). Development of leachate treatment at a large new tropical landfill site. Paper presented to Sardinia 2007, the Eleventh International Waste Management and Landfill Symposium, S Margherita di Pula, Cagliari, Italy, 1-5 October 2007. In the Proceedings on CD ROM, 10pp.

UK Environment Agency (2007). Guidance for the Treatment of Landfill Leachate: Sector Guidance Note IPPC S5.03, produced as Best Available Techniques (BAT) Guidance for the UK Waste Industry, under Integrated Pollution Prevention and Control (IPPC). Drafted by Howard Robinson, 2006-07, and published in February 2007. 182pp.

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