BiogenGreenfinch

Simon ChristianProject Surveyor

Tuesday 17th March 2009

Presentation Format

1. Twinwoods AD Plant – operational parameters

2. Feedstock

3. Bio-fertiliser utilisation

BiogenGreenfinch – Twinwoods plantOperational 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

Food Chain WasteWide 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

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

Bio-fertiliser Spreading

24m dribble bar spreading on Winter Wheat on 10th April 2007

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

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.

Thank you for listening

Simon Christian