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Influence of Fraction Particle Size of Pure Straw and Blends of Straw with Calcium Carbonate or Cassava Starch on Pelletising Process and Pellet

1
Department of Biosystems Engineering, Institute of Mechanical Engineering, Warsaw University of Life Sciences, Nowoursynowska 166, 02-787 Warsaw, Poland
2
Department of Production Engineering, Institute of Mechanical Engineering, Warsaw University of Life Sciences, Nowoursynowska 166, 02-787 Warsaw, Poland
3
Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
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Department of Fundamentals of Engineering and Energy, Institute of Mechanical Engineering, Warsaw University of Life Sciences, Nowoursynowska 166, 02-787 Warsaw, Poland
5
Department of Applied Mathematics, Institute of Information Technology, Warsaw University of Life Sciences, Nowoursynowska 166, 02-787 Warsaw, Poland
*
Author to whom correspondence should be addressed.
Materials 2020, 13(20), 4623; https://doi.org/10.3390/ma13204623
Received: 26 September 2020 / Revised: 13 October 2020 / Accepted: 14 October 2020 / Published: 16 October 2020
(This article belongs to the Section Biomaterials)
The aim of this study was to investigate the pressure agglomeration process of wheat straw (WS) and the blends of WS with calcium carbonate (CC) or cassava straw (CS) with a ratio of 6% wt./wt. from seven separate fractions with sizes in the range of 0.21–2.81 mm. The agglomeration was performed at a moisture of 30% wb and a material temperature of 78 °C, with a dose of 0.1 g, in a die of diameter 8 mm and height 80 mm. The effects of the process were evaluated based on the compaction parameters and the pellets’ density, tensile strength, and water absorption. The incorporation of additives into the WS improved the pellet process and quality. Refined results were achieved after adding CC, as compared to those achieved after adding CS, and the preferred particle size was in the range of 1.00–1.94 mm. This was because, under the given conditions, the back pressure in the die chamber significantly increased, allowing the achievement of a single pellet density of 800 kg·m−3. The pellets were resistant to compressive loads and cracked only at tensile strength of 6 MPa and a specific compression work of 6.5 mJ·mm−2. The addition of CC to the WS improved the strength of the adhesive and the cohesive bonds between the particles. The water absorption for the uncrushed pellets was considerably less than that for crushed pellets, which results in the safer storage of uncrushed pellets and excellent moisture absorption of crushed pellets. The addition of CC to the WS offers benefits in the form of pellet strength with a high water absorption capability. Notably, a study of crushed pellet litter under broiler rearing conditions and an analysis of the operational costs of using WS additives are required for implementing this study. View Full-Text
Keywords: biomass; additives; pressure agglomeration; pellet strength; water absorption biomass; additives; pressure agglomeration; pellet strength; water absorption
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MDPI and ACS Style

Lisowski, A.; Matkowski, P.; Mieszkalski, L.; Mruk, R.; Stasiak, M.; Piątek, M.; Świętochowski, A.; Dąbrowska, M.; Obstawski, P.; Bakoń, T.; Karpio, K. Influence of Fraction Particle Size of Pure Straw and Blends of Straw with Calcium Carbonate or Cassava Starch on Pelletising Process and Pellet. Materials 2020, 13, 4623. https://doi.org/10.3390/ma13204623

AMA Style

Lisowski A, Matkowski P, Mieszkalski L, Mruk R, Stasiak M, Piątek M, Świętochowski A, Dąbrowska M, Obstawski P, Bakoń T, Karpio K. Influence of Fraction Particle Size of Pure Straw and Blends of Straw with Calcium Carbonate or Cassava Starch on Pelletising Process and Pellet. Materials. 2020; 13(20):4623. https://doi.org/10.3390/ma13204623

Chicago/Turabian Style

Lisowski, Aleksander; Matkowski, Patryk; Mieszkalski, Leszek; Mruk, Remigiusz; Stasiak, Mateusz; Piątek, Michał; Świętochowski, Adam; Dąbrowska, Magdalena; Obstawski, Paweł; Bakoń, Tomasz; Karpio, Krzysztof. 2020. "Influence of Fraction Particle Size of Pure Straw and Blends of Straw with Calcium Carbonate or Cassava Starch on Pelletising Process and Pellet" Materials 13, no. 20: 4623. https://doi.org/10.3390/ma13204623

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