Nutritional value of dehydrated maize straw ammoniated with urea

Sousa, Giovanne Oliveira Costa; Rodrigues, Rosane Cláudia; Lima, Juliana Rodrigues Lacerda; Lima, Noilson Monteles de; Miranda, Bruno Eduardo Caxias; Jesus, Ana Paula Ribeiro de; Parente, Henrique Nunes; Costa, Clésio dos Santos

doi:10.1590/s1519-9940200132019

Cited by 1 publication

(2 citation statements)

References 16 publications

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“…The extruded corn straw was tested for the WAI and WSI, where the WAI reflects the amount of water bound by the product while the WSI represents the amount of small molecules dissolved in water depending on molecular damages caused by processing conditions [ 27 , 32 ]. The WAI and WSI results for extruded corn straw are shown in Figure 2 b,c.…”

Section: Resultsmentioning

confidence: 99%

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The Influence of Corn Straw Extrusion Pretreatment Parameters on Methane Fermentation Performance

et al. 2020

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The aim of the study is to determine the energy consumption of the extrusion-cooking process of corn straw under various conditions (screw speed, moisture content), water absorption measurements and water solubility indices as well as biogas efficiency evaluation. The extrusion-cooking of corn straw was carried out using a single screw extruder with L/D = 16:1 at various rotational screw speeds (70, 90, and 110 rpm) and with various initial moisture content of raw material (25 and 40%). Prior to the process, the moisture content of the raw material was measured, and next, it was moistened to 25 and 40% of dry matter. For example, at 70 rpm extruder screw speed, the temperature range was 126–150 °C. Energy consumption of straw pretreatment through extrusion-cooking was assessed in order to evaluate the possibility of using the process in an agricultural biogas plant. Biogas and methane efficiency of substrates after extrusion was tested in a laboratory scale biogas plant and expressed as a volume of cumulative methane production for fresh matter, dry matter, and dry organic matter. Pretreated corn straw moistened to 25% and processed at 110 rpm during the extrusion-cooking processing produced the most advantageous effect for methane and biogas production (51.63%) efficiency as compared to corn straw without pretreatment (49.57%). Rotational speed of the extruder screw influenced biogas and methane production. With both dry matter and dry organic matter, the increase of rotational speed of the extruder screw improved the production of cumulated biogas and methane. Pretreatment of corn straw has a positive effect on the acquisition of cumulated methane (226.3 Nm3 Mg−1 for fresh matter, 243.99 Nm3 Mg−1 for dry matter, and 254.83 Nm3 Mg−1 for dry organic matter). Preliminary analysis of infrared spectra revealed changes in the samples also at the molecular level, thus opening up the possibility of identifying marker bands that account for specific degradation changes.

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Section: Resultsmentioning

confidence: 99%

“…Before processing, the materials were stored in sealed bags for a period of 24 h to unify the migration of water. The study pertained to maize straw whose chemical composition was derived from the most up-to-date source data [ 26 , 27 ]…”

Section: Methodsmentioning

confidence: 99%