Characterisation of organomineral fertilisers derived from nutrient-enriched biosolids granules

Antille, Diogenes L. and Sakrabani, Ruben and Tyrrel, Sean F. and Le, Minh S. and Godwin, Richard J. (2013) Characterisation of organomineral fertilisers derived from nutrient-enriched biosolids granules. Applied and Environmental Soil Science, 2013 (Article 694597). pp. 1-11. ISSN 1687-7667

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Organomineral fertilisers (OMFs) were produced by coating biosolids granules with urea and potash. Two OMF formulations with 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 four batches of OMF and biosolids granules 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 618 kg m−3, and 1297 to 1357 kg 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. Static particle strength was between 1.18 and 4.33 N mm−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 5.50 mm in diameter with about 80% of the particles in the range of 2.25 to 4.40 mm to enable application at 18 m tramline spacing. This research utilises novel technology to improve the fertiliser value of biosolids, reduce disposal costs, and deliver a range of environmental benefits associated with recycling.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Special Issue: Biosolids Soil Application - Agronomic and Environmental Implications. Copyright © 2013 Diogenes L. Antille et al. This is an open access article distributed under the Creative Commons Attribution 4.0 License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 20 May 2014 03:41
Last Modified: 18 Dec 2017 05:39
Uncontrolled Keywords: sewage; sludge; recycling; fertiliser analysis
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)
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Socio-Economic Objective: B Economic Development > 83 Animal Production and Animal Primary Products > 8398 Environmentally Sustainable Animal Production > 839804 Management of Solid Waste from Animal Production
Identification Number or DOI: 10.1155/2013/694597

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