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Water Services National Training Group

Water Services National Training Group. 11 th Annual Conference 6 th September 2007. Midleton FOG Project. Sam Crowley B.E. (Civil) Graduate Engineer, Cork County Council M. Eng. Sc. Student Civil & Env. Eng. UCC (Prof. G. Kiely, Supervisor). Midleton FOG Project.

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Water Services National Training Group

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  1. Water Services National Training Group 11th Annual Conference 6th September 2007

  2. Midleton FOG Project Sam Crowley B.E. (Civil) Graduate Engineer, Cork County Council M. Eng. Sc. Student Civil & Env. Eng. UCC (Prof. G. Kiely, Supervisor)

  3. Midleton FOG Project • Town of Midleton (population 9,019) proposed by Cork County Council as a suitable location for a case study. • Midleton has a history of FOG related problems. • €68,372 spent in 2005 including cleaning of pumping stations €39,687 of this for FOG related work. • Approximately 58% of total spent on drain cleaning was FOG related. • There are 63 FOG generators in Midleton.

  4. Midleton FOG Project • Local authority identified “FOG Hotspots” within the town. • Each FOG hotspot was analysed and potential FOG generators were visited. • The FOG problem at each site was evaluated. • CCTV surveys • Inspection of existing Grease Removal Unit (GRU) • GRU maintenance procedures investigated • Staff interviews to determine blockage history and current kitchen practices • Site survey to determine adequacy of existing systems. • Potential solutions tailored to each site were selected and installed. • Each solution is to be on trial for a minimum of 6 months.

  5. Midleton FOG Project Total of 16 trial sites including: • 4 Active Systems • 8 Passive Systems (including 3 Grease trap bacteria treatment systems) • 1 Portable System • 1 Bacteria dosing system in a manhole • 1 Aerated bacteria dosing system for a pumping station • 1 Root cutting site • 3 of the systems are being maintained by contractors • 8 are maintained by the staff of the Food Service Establishment (FSE)

  6. Midleton FOG Project Total of 16 trial sites including: • 1 Hotel • 1 Hospital • 1 Fish Monger with kitchen (Fish Pies etc.) • 3 Shops with hot food counters • 1 Shopping centre with butcher, bakery and delicatessen • 2 Fast food establishments • 1 Small family restaurant • 1 Butcher • 1 Café with hot food kitchen • 1 Manhole at a FOG hotspot (Chinese Restaurant) • 1 Pumping station for a housing estate • 1 Sewer in a housing estate • 1 Site still to be determined

  7. Rating of systems • Conformity to I.S. EN 1825 Standards • Performance • Effluent sample analysis • CCTV surveys (before and after) • Blockage History (before and after) • Maintenance - User Friendliness • Ease of access • Hygiene • Odours • Maintenance interval

  8. Rating of systems • Cost • To purchase • To install • To maintain • User Satisfaction • Waste • Reliability • Contractor or in-house cleaning • Level of Confidence • The trial sites themselves are also under observation. • Willingness to maintain the system • Kitchen practices

  9. Performance so far • Early stages of trials • Major improvements observed already • Effluent sample analysis

  10. Performance so far

  11. Performance so far • Statistics being compiled regarding the waste being removed from the systems • Maintenance procedures observed and rated • Supplier/manufacturer procedures under observation • Not adhering to I.S. EN 1825 standards • One supplier withdrew system from trials • Contractor behaviour under observation

  12. Issues arising from trials • Active/Automatic vs. Passive debate

  13. Automatic/Active vs. Passive Systems

  14. Issues arising from trials • Active/Automatic vs. Passive debate • Disposal of waste • Cost • Traceability • Large quantities • Small quantities • Clarity • Lack of disposal records for waste FOG (both by contractors and business owners).

  15. Issues arising from trials • Licensing • Regular policing and enforcement required • Method based consent • Lack of co-operation between different departments • Planning • Environmental Department • Environmental Health Officers • Fear of prosecution by EHO (Environmental Health Officers) leading to fear of grease traps! • New premises gaining planning permission and grease trap subsequently not being installed.

  16. Issues arising from trials • Trade Effluent Licences awarded to establishments without thorough site investigation • Inadequate GRU’s approved • Lack of resources • Lack of records for FOG related incidents • More difficult for prosecution • Harder to compile statistics

  17. Issues arising from trials • Incorrectly installed or situated traps. • Appliances passing through grease trap. • Traps maintained incorrectly or not at all. • Lack of knowledge of existence of GRU (Grease Removal Unit). • Forgery of grease trap maintenance records by staff to avoid doing the work.

  18. Issues arising from trials • Poor kitchen practices negating grease trap maintenance. • Willingness to install trap but guidance not available. • Willingness to apply for discharge licence but confusion caused by application form and process.

  19. Portable Interceptor • Similar to passive interceptor • Maintained by contractor • Unit swapped with clean unit every two weeks. • Full unit is removed from site and cleaned at contractors premises • Removes need for maintaining unit within kitchen – hygiene and odour issues

  20. Outputs of Midleton Case Study • Better understanding of systems on the market in Ireland • Greater appreciation of all points of view • User • Supplier • Contractor

  21. Outputs of Midleton Case Study • Greater understanding of kitchen practices • Where most FOG is generated in different types of FSE • Wok cooker, combination oven etc. • Tools for handling FOG related issues • Ireland specific FOG letters • Grease Trap Guidance sheets • Kitchen Practice Guidance sheets • Grease Trap Maintenance Record sheets

  22. Conclusion • Disposal of waste is a significant issue which needs to be addressed • Waste stream is dramatically increasing without adequate disposal routes. • MEngSc Thesis: “Recovery of Waste FOG for use as a Biofuel in Ireland”

  23. Acknowledgments • Noel O’Keeffe - A/County Engineer, Cork Co. Co. • Matt Shortt - WSNTG • Tadgh O’Connor -DEHLG • Shane Kennedy -Cork Co. Co. • WRc • Midleton Town Council • Cork Co. Co. Environmental Section

  24. Water Services National Training Group 11th Annual Conference 6th September 2007

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