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Biobeds Five Arable Farm Case Studies

Biobeds Five Arable Farm Case Studies. Prepared by Bill Basford. Welcome. Each study comprises five slides About the farm Previous practice and risks to water Solution Costs and Grants Farmer Feedback

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Biobeds Five Arable Farm Case Studies

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  1. BiobedsFive Arable FarmCase Studies Prepared by Bill Basford

  2. Welcome Each study comprises five slides • About the farm • Previous practice and risks to water • Solution • Costs and Grants • Farmer Feedback More information are contained in the speakers notes version of these case studies. These can be found here

  3. Click this home button to get back to this page The five arable farms 1 Berkshire – Biobed - 1000Ha Click each farm to go direct their start (About the farm) page Or click page down or return on keyboard to scroll through each case study 2 Suffolk – Biofilter – 1700Ha 3 Norfolk – Biobed – 1200Ha 4 Essex - Covered Area – 445Ha 5 Norfolk 2 - Biobed - 282Ha

  4. 1 About The Farm 1 Berkshire – Biobed - 1000Ha • Lambourn, Berkshire • 1,000ha arable, combinable crops • Berthoud Self Propelled 30m, 4,200 litres • Sprayer washed down in field and yard • Annual Washings • 2,500 – 3,500l internal washing • 1,500l external washing • 21,000l rainwater

  5. 1 Water Risks • Borehole 75m from site. • Porous stoned area, no apparent drainage route • Possible accumulations over chalk subsoil • No specific washings disposal plan • Currently no detections in surface water • Concern at risks to groundwater (chalk)

  6. 1 Solution • Bunded fill area created, • Gravity feed to pre biobed holding tank • Pumped to biobed and then to irrigation area • Dedicated fill area • Treatment capacity • Approx 30,000l washings and rainwater Bunded fill area, central drain

  7. 1 Costs and Grants Grant Received £1,800 on biobed cost only • Handling area: £9,000 • Biobed: £2,200. • Farm labour: • Biobed hole • Mixing biomix • Optional extras: • Filter • Pressure gauge Gravity flow from fill area

  8. 1 Farmer Feedback • No functional problems • Check all material specifications • Peace of mind • Liquid fertiliser scorch Biobed with central pump

  9. 2 About The Farm • Clare, Suffolk • Arable, combinable crops, 1700 ha. • John Deere 4,000 L, 24m self propelled • Concrete sloping area with run off • No known pollution issues 2 Suffolk – Biofilter – 1700Ha Original fill area Sprayer filling area, rainwater harvesting and biofilter supported by Essex & Suffolk Water as demonstration site

  10. 2 Water Risks • Unidentifiable drainage route • Site close to watercourse leading to River Stour • Sprayer washed down in field and yard • No specific washings disposal plan • Washouts c. 6-7 per year, 2,800 – 3,500l • No problems with surface or ground water

  11. 2 Solution • Total water volume for filling area and biobed excessive • New facility with dedicated chemical storage • Fill area in new covered sprayer store eliminating rainfall • Biofilter now sufficient for washing volumes • Biofilter drainage pumped to final irrigation area in small wood New sprayer store/fill area with rainwater harvesting

  12. 2 Costs and Grants • New sprayer store: £17,000 • Fill area/floor to chemical store: £10,000 • Biofilter £1,200 • Optional extras - auto panel door: £2700 • CSF Grant for biofilter + roofed area: £5,292

  13. 2 Farmer Feedback • Used since 2012, no problems, meets requirements well • Limits washings/ dirty water produced • Can wash sprayer down Fill area bunded below access level, building includes and biofilter & chemical store Biofilter within sprayer store/fill area. Influent/effluent sampled by Essex & Suffolk Water

  14. 3 About The Farm • East Lexham, Norfolk • Arable and root crops 1200 Ha • 36m trailed sprayer, 6000 litre capacity • Most washing done in field • Annual Washings • 8-10 per year = 6,000 l max • Extra wash down volumes 350 l/washdown = 3,500 l • Rainwater = 24,000 l • Total > 30,000 l 3 Norfolk – Biobed – 1200Ha

  15. 3 Water Risks • Original site: • concrete yard sloping to yard drain • traffic crossing area • possible yard run-off across road to watercourse and an SSSI only 104m away! • Disposal - No arrangements • Ground and Surface Water risks and local highway could convey to local culvert

  16. 3 Solution • Bunded fill area, dedicated drainage to tank to biobed and then irrigation area • 3 pump system • 6000 l emergency sized tank for fill area pre-biobed; operates at 1,500 l by float switch control. • Handles 35,000 l per year • Biobed and irrigation area created in unused farm yard area. Bunded fill area with cross drain Biobed with central extract pump

  17. 3 Costs and Grants • Handling Area • minimal spend, new bund area created, farm labour used. • Ground work equipment, concrete, electrics and drains £3,804 plus farm labour cost. • Washings Treatment 7 x 6m biobed • Kit: liner £764, 3 pumps and pipework £675 • Extras: 3 pumps. • Grant from Natural England NB Costs from 2008

  18. 3 Farmer Feedback • Biobed: sound anti-pollution policy • 3 pump system regretted, would have preferred gravity flow Early view of irrigation area • No problems, irrigation area has good vegetative growth. • Investment supported sound management avoiding pollution

  19. 4 About The Farm 4 Essex - Covered Area – 445Ha • Chelmsford, Essex • Combinable crops 445 ha • Knight self propelled 24m 3000L • Sprayer previously filled in other yard areas • Annual Washings • 4-6 pa = 2,000 l maximum • 250 l x 4-6 external washdowns = 1,000-1500 l • Rainwater = 21m3 annually • Total > 24,500 l 2010 Original fill area, nil control of discharges

  20. 4 Water Risks • Unknown drainage route from fill area • Fill site in main yard, sloping • Heavy traffic flow from let buildings • Sprayer washed out and down in field • No specific washings disposal plan • No surface problems with surface water yet • Looking for ecurity in potential pollution control 2012 - 3 x rinsed containers now drain to IBC Temporary fill area, bunded to control washings/spills 2011

  21. 4 Solution • Bunded fill area developed first • New building w fill area, chemical and sprayer store. • Water volumes minimised • Liquid directed from fill area to 7000 l holding tank • Less than 1000 l per season • No biobed/filter • Easy to adapt in future 2012 New facility housing chemical store and fill area

  22. 4 Costs and Grants • Building, w chemical store, general storage area, fill area, apron & all tanks and drainage, 2 x 7000 l water supply tanks also included, approx £72,000, • Grant – towards concrete fill area for sprayer and roof directly above this £3,434

  23. 4 Farmer Feedback • Secure building • New site isolated from yard traffic • Self contained operation • Meets current rules • Adaptable to future needs Chemical store under development in new facility

  24. 5 About The Farm • Cawston, Norfolk • 112 + 170 ha arable, combinable crops farm part of 1200 ha business • 2 x Sands 24m Self Prop. 1 x 3000 l, 1 x 4000 litre • Sprayers filled in other yard; in-field wash out • Annual Washings • 8 Washouts pa = 4,500 l max • 8 x 250 l per exterior = 2,000 l • Rainwater = 24m3 • Total = 30,500 l 5 Norfolk 2 - Biobed - 282Ha

  25. 5 Water Risks • Unidentifiable drainage route • Fill site close to watercourse leading to River Wensum • Sprayers washed out in field with some pressure washing in yard areas. • No washings disposal plan • No problems yet but watercourse within 25m

  26. 5 Solution • Fill area now 10m from liquid fert. store • A direct biobed due to • limited space • no power: so gravity flow for direct biobed and solar power to recharge 2 x 12v batteries for pump • Enough flow and pressure to meet biobed needs • Pump delivers biobed drainage to final distribution area (40m2) Solar panel for recharge 12v system Drive on direct biobed

  27. 5 Costs and Grants • Direct biobed fill area, £5,800, limited farm labour to dig out biobed pit and produce and install drive over grid • Grant Received £2,700 Solar panel Drive on grid

  28. 5 Farmer Feedback • System in use from 2010 • No problems: system works well, batteries charge and pump actuation good. • Peace of mind • May develop new roofed fill area and chemical store at other farms as a result of good performance with this unit. • Used within contract farm operations, farm owner also appreciates facility. Secure battery storage Drip irrigation on nearby bank

  29. The End 1 Berkshire – Biobed - 1000Ha 2 Suffolk – Biofilter – 1700Ha 3 Norfolk – Biobed – 122100Ha 4 Essex - Covered Area – 445Ha 5 Norfolk 2 - Biobed - 282Ha • More information is contained in the speakers notes version of these case studies. These can be found here

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