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Twinwoods Case Study

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Bioenergy West Midlands …

Bioenergy West Midlands
Anaerobic Digestion Event and Site Visit
17th March 2009

Published in: Business, Technology
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Transcript

  • 1. BiogenGreenfinch Simon Christian Project Surveyor Tuesday 17th March 2009
  • 2. Presentation Format 1. Twinwoods AD Plant – operational parameters 2. Feedstock 3. Bio-fertiliser utilisation
  • 3. BiogenGreenfinch – Twinwoods plant Operational plant –  Processing capacity of circa 42k tonnes of feedstock  12,000 cu.m of pig slurry  30,000 tonnes of mixed food chain waste  4,400 cu.m of digester vessels and 15,500 cu.m of Bio-fertiliser storage  Producing 1.1Mwatts of Electricity Commercial plant in farm situation  Designed to be flexible (feed stocks, wrapped and unwrapped, liquids and solids, future process flow changes) Complete integrated solution  35,000 cu.m of Bio-fertiliser used on the farm Heavily licensed  EA & DEFRA
  • 4. Food Chain Waste Wide range of food waste  Organic liquids  Meats  Fruit and vegetables  Organic sludge  Ready meals  Sandwiches etc Cat 3 Animal By-Products (ABP) Both packaged and non- packaged products Unfrozen and frozen food Plus 6% DM pig slurry
  • 5. Bio-fertiliser § Integrate use in farm setting – high nutrient availability on growing crops – cereals, OSR and grass § Valuable fertiliser  Total Nitrogen 5 to 5.5kg/m3  Crop Available Nitrogen – 4kg/m3  Phosphate – 0.7kg/m3  Potash – 1.9kg/m3  Magnesium – 0.2kg/m3  DM – 4 to 5% § Typically spread at 45 to 50cu.m per hectare on to arable crops
  • 6. Bio-fertiliser Spreading 24m dribble bar spreading on Winter Wheat on 10th April 2007
  • 7. Bio-fertiliser Utilisation - Underground main and umbilical spreading system the only feasible way to spread the volume - Spreading with Para 7a license at present - NVZ regulations are a key factor in spreading volume/Ha - Applications to meet crop need (crop, variety, yield expectation, soil type, soil N) - Twinwoods Bio-fertiliser spread across 600ha with fertiliser saving of circa £120,000/annum to arable business
  • 8. Summary § Twinwoods plant operating at design capacity. § Major design changes to second generation plant as a result of operational experience § Feed stock availability determines the potential scale of the plant, subject to planning § Digestate spreading is a key element to feasibility and determines a major operational limitation to the scale of the plant.
  • 9. Thank you for listening Simon Christian

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