Optimisation of high shear granulation of multicomponent fertiliser using response surface methodology

Mangwandi, Chirangano; Albadarin, Ahmad B.; Al-Muhtaseb, Ala’a H.; Allen, Stephen; Walker, Gavin

doi:10.1016/j.powtec.2012.03.047

Cited by 30 publications

(14 citation statements)

References 27 publications

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“…On the contrary, there are also some other reports in literature where a reduction in the mean granules size was observed when the impeller speed was increased [12,19,20]. Earlier studies on different formulations revealed that increasing the impeller speed would result in a reduction of the product yield [21]. Whether the product yield would increase or decrease if the impeller speed is increased whilst keeping the granulation time constant depends on the balance between the two rate processes of growth and breakage.…”

Section: Effect Of Impeller Speed On Product Yieldmentioning

confidence: 96%

Alternative method for producing organic fertiliser from anaerobic digestion liquor and limestone powder: High Shear wet granulation

et al. 2013

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Publisher rights This is the author's version of a work that was accepted for publication in Powder Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Powder Technology, VOL 233, 01/2013 General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. energy production are considered as waste. This has a negative impact on the sustainability of AD processes because of the financial outlay required to treat digestate before being discharged into municipal water treatment plants or natural water bodies. The main aim of research was to investigate feasibility of producing an organic fertiliser using anaerobic digestate and limestone powders as the raw materials employing a high shear granulation process. Two-level factorial experimental design was used to determine the influence of granulation process variables on, the strength, resistance to attrition and yield of the granules. It was concluded from the study that it is technically feasible to produce organic fertiliser granules of acceptable strength and product yield. Increasing the liquid-to-solid ratio during granulation leads to increased granule strength and better product yield. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTAlthough the strength of the granules produced was lower than typical strength of commercial synthetic fertiliser granules (about 5 to 7 MPa), this could be improved by mixing the digestate with a polymeric binder or coating the particles post granulation.

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Section: Effect Of Impeller Speed On Product Yieldmentioning

confidence: 96%

Alternative method for producing organic fertiliser from anaerobic digestion liquor and limestone powder: High Shear wet granulation

et al. 2013

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“…The beds of granules were compressed to a maximum compression force of 500 N using a compression test speed of 10 mm/min. The force-displacement data obtained during the compression of bed or granules were analysed using a method described previously [11,12,[21][22][23] to obtain the single granule strength. Eq.…”

Section: Granule Strength Measurementsmentioning

confidence: 99%

High shear granulation of binary mixtures: Effect of powder composition on granule properties

Mangwandi¹,

Liu²,

Albadarin³

et al. 2015

Powder Technology

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General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. The granular product being designed in this work required the use of two different 3 powders namely limestone and teawaste; these materials have different bulk and particle 4 densities. The overall aim of the project was to obtain a granular product in the size range 2 5 to 4mm. The two powders were granulated in different proportions using 6 carboxymethylcellose (CMC) as the binder. The effect of amount of binder added, relative 7 composition of the powder, and type of teawaste on the product yield was studied. The results 8show that the optimum product yield was a function of both relative powder composition and 9 the amount of binder used; increasing the composition of teawaste in the powder increased 10

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“…• Empirical models: they are obtained from the regression of large set of experimental data, most of the time derived from the design of experiments statistic technique [44,48,49]. Empirical models have the advantages of being very simple (often polynomial equations), easy to obtain (regression of data), quite reliable within the investigated range.…”

Section: Mathematical Approach To Describe the Phenomena Involved In mentioning

confidence: 99%

Inside the Phenomenological Aspects of Wet Granulation: Role of Process Parameters

Simone¹,

Caccavo²,

Dalmoro³

et al. 2018

Granularity in Materials Science

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Granulation is a size-enlargement process by which small particles are bonded, by means of various techniques, in coherent and stable masses (granules), in which the original particles are still identifiable. In wet granulation processes, the powder particles are aggregated through the use of a liquid phase called binder. The main purposes of sizeenlargement process of a powder or mixture of powders are to improve technological properties and/or to realize suitable forms of commercial products. A modern and rational approach in the production of granular structures with tailored features (in terms of size and size distribution, flowability, mechanical and release properties, etc.) requires a deep understanding of phenomena involved during granules formation. By this knowledge, suitable predictive tools can be developed with the aim to choose right process conditions to be used in developing new formulations by avoiding or reducing costs for new tests. In this chapter, after introductive notes on granulation process, the phenomenological aspects involved in the formation of the granules with respect to the main process parameters are presented by experimental demonstration. Possible mathematical approaches in the granulation process description are also presented and the one involving the population mass balances equations is detailed.

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Optimisation of high shear granulation of multicomponent fertiliser using response surface methodology

Cited by 30 publications

References 27 publications

Alternative method for producing organic fertiliser from anaerobic digestion liquor and limestone powder: High Shear wet granulation

Alternative method for producing organic fertiliser from anaerobic digestion liquor and limestone powder: High Shear wet granulation

High shear granulation of binary mixtures: Effect of powder composition on granule properties

Inside the Phenomenological Aspects of Wet Granulation: Role of Process Parameters

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