Development of organomineral fertilisers derived from nutrient-enriched biosolids granules: product specification

Antille, D. L. and Sakrabani, R. and Tyrrel, S. F. and Le, M. S. and Godwin, R. J. (2013) Development of organomineral fertilisers derived from nutrient-enriched biosolids granules: product specification. In: American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2013), 21-24 Jul 2013, Kansas City, MO. United States.

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A technique was developed to produce organomineral fertilisers (OMF) using biosolids granules coated with urea and potash. Two OMF formulations with the following N:P2O5:K2O compositions: 10:4:4 (OMF10) and 15:4:4 (OMF15) were developed for application in grassland and arable crops. Routine fertiliser analyses were conducted on OMF and biosolids samples, and compared with a sample of urea to determine key physical and chemical properties of the materials which affect handling and spreading, soil behaviour and fertiliser value. Bulk and particle densities were in the range of 608 to 618kg m-3, and 1297 to 1357kg m-3 respectively. Compression tests showed that OMF particles undergo deformation followed by multiple failures without disintegration of the granules when vertical load was applied. This behaviour was attributed to the moisture content (�15% w w-1) and the organic nature of the material. Static particle strength was between 1.14 and 6.31 Nmm-2 depending on the particle diameter. The use of a model for fertiliser particle distribution studies showed that OMF granules should be between 1.10 and 5.50mm in diameter with about 80% of the particles in the range of 2.25 to 4.40mm to enable application at 18m tramline spacing. This research is novel as it utilises technology to improve fertiliser value of biosolids to increase usage by farmers, reduce disposal costs and deliver the range of environmental benefits associated with recycling.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: No
Item Status: Live Archive
Additional Information: © (2013) by the American Society of Agricultural & Biological Engineers. For information about securing permission to reprint or reproduce a technical presentation, please contact ASABE at or 269-932-7004 (2950 Niles Road, St. Joseph, MI 49085-9659 USA). Paper # 131620153.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 08 Jul 2014 02:42
Last Modified: 07 Aug 2017 00:11
Uncontrolled Keywords: organomineral fertilisers; OMF; physical and chemical properties; biosolids granules; recycling
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090410 Water Treatment Processes
07 Agricultural and Veterinary Sciences > 0799 Other Agricultural and Veterinary Sciences > 079902 Fertilisers and Agrochemicals (incl. Application)
07 Agricultural and Veterinary Sciences > 0701 Agriculture, Land and Farm Management > 070101 Agricultural Land Management
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences
Identification Number or DOI: doi:10.13031/aim.20131620153

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