Paul Gibbs, 4R group

1. HOW WILL THE DIGESTATE MARKET DEVELOP?
CHAIR:
DR DAVID TOMPKINS, WRAP
PANEL:
ANNA BECVAR, EARTHCARE TECHNICAL LTD
DR NICK CHEFFINS, PEAKHILL ASSOCIATES LTD
DR PAUL GIBBS, 4R GROUP LTD
MATT TAYLOR, ADAS UK LTD

2. Digestate recycling the need for careful planningDr Paul GibbsTechnical Director, 4R Group Ltd

3. Smart contracting not simply land spreading
What is4R GroupLtd?
A unique combination of consultancy and contracting skills focused on the design and delivery of recycling services

4. Waste Competition
•Farm manure –Farm priority No. 1
•Sewage Sludge –well established
•Compost
•Industrial materials
•Gate fee vrs sale

5. Digestate Quality
•Nutrients –N, P, K, Mg, S
•Trace elements
•Organic matter
•Lime value
•Dry matter
•Available Nitrogen –very high
-C
-N
-Mg
-P
-K
-Zn
-Cu
-S

6. Legislative/CoP Controls
•Pre QP -Environmental Permitting
•Post QP –QP/CoP
•Match nutrients supplied with crop requirement
•NVZ’s
-Total N application of 250 kg total N
-> 30% available N –closed period
-high available N –reduced application

7. Application Windows
Wet spring, summer and autumn ?

8. Need for Storage

9. Summary
•Many benefits
•Careful management required
•Bare in mind the benefits vrs costs
Dr Paul Gibbs –07826 161161paul.gibbs@4r-group.co.uk