The variability in nutrient composition of Anaerobic Digestate granules produced from high shear granulation.
This study investigates the production of organic fertilizer using Anaerobic Digestate (as a nutrient source) and limestone powder as the raw materials. A two-level factorial experimental design was used to determine the influence of process variables on the nutrient homogeneity within the granules. Increasing the liquid-to-solid ratio during granulation resulted in increased granule nutrient homogeneity. Increasing the processing time and the impeller speed were also found to increase the nutrient homogeneity. In terms of nutrients release into deionized water, the granules effectively released both potassium and phosphate into solution.
School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast BT9 5AG, Northern Ireland, UK. c.mangwandi@qub.ac.uk
Chirangano
C
Mangwandi
Liu
L
JiangTao
Ahmad B
AB
Albadarin
Stephen J
SJ
Allen
Gavin M
GM
Walker
D000818:Animals; D019149:Bioreactors; D002119:Calcium Carbonate / Q000737:chemistry*; D005308:Fertilizers / Q000032:analysis*; D010316:Particle Size; D059027:Recycling; D018505:Waste Management
D005308:Fertilizers; D002119:Calcium Carbonate