Revista Brasileira de Engenharia de Biossistemas <table style="height: 190px;" width="800"> <tbody> <tr> <td width="141"> <h2 class="title"> </h2> <h2 class="title"> <img src="" /></h2> </td> <td width="425">The <em>Brazilian Journal of Biosystems Engineering</em> (BIOENG) publishes original articles that present theoretical, experimental, computational advances and innovations in the areas of agricultural and environmental systems, bringing applications for the sustainable development of agricultural and animal biosystem productions. BIOENG journal publishes interdisciplinary scientific articles and prioritizes issues related to Sustainable Development Goals (SDGs) of the United Nations (UN).</td> </tr> </tbody> </table> UNESP, Campus de Tupã en-US Revista Brasileira de Engenharia de Biossistemas 1981-7061 <p>Authors who publish in this journal agree to the following terms:</p> <p>a) Authors retain the copyright and grant the journal the right of first publication, with the work simultaneously licensed under the Creative Commons Attribution License that allows the sharing of the work with recognition of authorship and initial publication in this journal.</p> <p>b) Authors are authorized to assume additional contracts separately, for non-exclusive distribution of the version of the work published in this journal (eg, publish in an institutional repository or as a book chapter), with recognition of authorship and initial publication in this journal.</p> VIABILITY OF POLYPROPYLENE POLYMER COMPOUNDS REINFORCED WITH BAMBOO FIBER <p>The aim of this research was to evaluate the mechanical properties of polymeric composites made of polypropylene matrix with the addition of bamboo fibers <em>(Dendrocalamus strictus).</em> For this purpose, the bamboo was processed in a hammer mill. The resulting particles were selected by its granulometry, characterized through basic moisture test, bulk density and total of extractives, lignin and ash, and dried to a moisture content of 3 %. While, polypropylene was purchased from local businesses. Four specimens from each treatment (80 % polypropylene and 20 % bamboo fibers; 100 % polypropylene) were molded from these two raw materials were shaped in a forming hot box, and subjected to static bending tests, in order to obtain the modulus of elasticity (MOE) and modulus of rupture (MOR). The influence of the addition of bamboo fibers in polypropylene matrices was verified through a statistical analysis of variance (ANOVA) at 5 % significance. The results showed that bamboo fibers presented high values of lignin, holocellulose, density and extractives, concomitant to ash and moisture values compatible with other researches. Furthermore, the properties of composites containing the addition of this natural material did not show statistically different values in relation to the reference samples. The absolute values of MOE and MOR, experienced increasing and decreasing trends with the incorporation of bamboo fiber respectively. Therefore, it has not been possible to demonstrate the viability of this level of bamboo fibers addition in polypropylene matrix composites and it is recommended, in future works, to carry out pretreatments on the fibers and/or addition of different levels of these lignocellulosic materials in the composite.</p> Diogo Antonio Correa Gomes Eduardo Hélio Novais Miranda Ana Carolina Corrêa Furtini Carolina Aparecida dos Santos Mariane Duarte Resende Denisse Concepción Vega Villarruel José Benedito Guimarães Júnior Copyright (c) 2021 Revista Brasileira de Engenharia de Biossistemas 2021-11-29 2021-11-29 15 4 511 522 10.18011/bioeng2021v15n4p511-522 ALLELOPATHIC POTENTIAL OF AQUEOUS EXTRACT OF LEAF AND ROOT SESAME ON SICKLEPOD AND BRACHIARIA SEEDS <p>Sicklepod is an important weed in Brazil pastures, but control measures are not yet effective. Thus, allelopathy can be an alternative, due to its ecological importance and for being able to provide new structures sources for agrochemicals production. This research aimed to verify the allelopathic potential of sesame (<em>Sesamum indicum</em> L.) on germination and seedling development of sicklepod (<em>Senna occidentalis</em> L.) and brachiaria (<em>Brachiaria brizantha</em>). The treatments were root and leaf extract of sesame, and control (distilled water).&nbsp; Germination percentage, speed of germination, hypocotyl and radicle length were evaluated. Speed of germination, germination percentage and radicle length had no interference from the aqueous extracts. However, in brachiaria these traits had lower values than sicklepod. Hypocotyl length was not influenced by the extracts, however, the leaf extract showed lower growth of this feature. Allelopathy did not affect germination and speed of germination in both species, but interfered in brachiaria development.</p> Gustavo Ferreira da Silva Nilbe Carla Mapeli Cassiano Cremon Larissa Chamma Bruno Cesar Ottoboni Luperini Gabrieli Ferreira da Silva Fernando Ferrari Putti Copyright (c) 2021 Revista Brasileira de Engenharia de Biossistemas 2021-11-29 2021-11-29 15 4 523 537 10.18011/bioeng2021v15n4p523-537 CONTINUOUS-FLOW EXTRACTION OF BIOCOMPOUNDS IN FIXED BED: INFLUENCE OF SWAPPING FROM DIRICHLET TO DANCKWERTS CONDITION AT INLET IN PHENOMENOLOGICAL MODELS <p class="Simples">Phenomenological models have increasingly become vital to bioprocess engineering. In continuous-flow biocompounds extraction models, diffusion requires an extra boundary condition at exit (usually null Neumann condition) while either Dirichlet or Danckwerts condition can be imposed at inlet. By taking an extant case study and with the help of an in-house lattice-Boltzmann simulator, this work numerically examines prospective effects of interchanging aforesaid inlet conditions. Trial simulations were performed for scenarios ranging from convective-dominant to diffusive-dominant. Extraction yields numerically simulated under each inlet condition were compared with experimental data. Expected shape of extraction yield curves was simulated whenever process parameters were properly provided and differences due to switching inlet conditions became evident only in diffusion-dominant extraction scenarios. At diffusivities of order 10<sup>-</sup><sup>6</sup> m<sup>2</sup> s<sup>-</sup><sup>1</sup>, numerical results suggest that Danckwerts boundary condition should be preferred at bed inlet.</p> Naila Albertina de Oliveira Jose Antonio Rabi Copyright (c) 2021 Revista Brasileira de Engenharia de Biossistemas 2021-11-29 2021-11-29 15 4 538 560 10.18011/bioeng2021v15n4p538-560 PRODUCTIVITY OF SOYBEAN CULTIVARS IN THE 2020/21 AGRICULTURAL YEAR WITH AND WITHOUT SUPPLEMENTARY IRRIGATION IN THREE SEEDING SEASONS IN THE CENTRAL REGION OF RIO GRANDE DO SUL <p>This study aims to evaluate the influence of supplemental irrigation and three sowing times (5/11/20; 3/12/20 and 14/1/21) on the yield of soybean cultivars from different GMRs (5.0; 5.5; 6.3), in the edaphoclimatic conditions of the central region of RS for the 2020/21 agricultural year. The field experiment was installed in an experimental area at Uergs Cachoeira do Sul - RS. Supplemental irrigation provided positive increments in all soybean yield components, providing average yield gains of around 37%, making it possible to reach a yield of up to 6757.5 kg ha<sup>-1</sup> in the 5/11 sowing. Cultivars of GMR 5.5 and 6.3 were more productive regardless of the water regime and for the three sowing dates. There was a reduction in all components of soybean yield and productivity on average of 32 kg ha day<sup>-1</sup> with the delay in sowing from 5/11 to 14/1.</p> Zanandra Boff de Oliveira Alberto Eduardo Knies Copyright (c) 2021 Revista Brasileira de Engenharia de Biossistemas 2021-12-17 2021-12-17 15 4 561 576 10.18011/bioeng2021v15n4p561-576 ACRYLIC FABRIC DYEING WITH REUSE ASTRAZON BASIC DYE SOLUTION, TREATED WITH RESIDUE FROM BUNGE INDUSTRY AS ADSORVENT <p>The textile industry uses large volumes of water in its processes. Thus, finding an effluent treatment, aiming at its reuse, is sought after. Dyeing with distilled water (standard), monochromatic solutions with blue and red dyes, and bichromy, in different percentages in dye until 1.0%(m/m). The effluents obtained were collected in order to carry out their treatment, carried out by adsorption with vegetable oil clarification residue from the food industry, showing high efficiency. The K/S and ΔE coloristic parameters show the possibility of its reuse, as the K/S obtained varied, up to 9.48% in relation to the standard. The maximum ΔE obtained was 0.66, with values ​​less than 1.0 accepted in the industry. In relation to quality tests, most of them presented a value of 5, maximum grade according to the standard. This positive behavior proves that the procedure is efficient and economical since it uses few inputs and these come from industrial waste.</p> Ivonete Oliveira Barcellos Júlia Feller Giovana Aparecida Vieira Copyright (c) 2021 Revista Brasileira de Engenharia de Biossistemas 2021-12-17 2021-12-17 15 4 577 597 10.18011/bioeng2021v15n4p577-597 SOIL PHYSICAL QUALITY OF ARENOSOL IN THE ENVIRONMENTAL SEMIARID UNDER AGRICULTURAL INTEGRATED SYSTEMS <p>The world demand for food has contributed to the expansion of new agricultural frontiers in sandy soils. However, these soils are fragile and need to be well managed so that they can express their productive potential. The objective of this study was to evaluate the physical quality of a Neosol Regolithic under an integrated crop-livestock system in the semiarid region of Paraíba. 11 treatments were evaluated in a completely randomized design, with five replications. The samples with undisturbed structure were collected in the 0-0.1 and 0.1-0.2 m layers and used to determine the total porosity (Tp), Macroporosity (Ma), microporosity (Mi), aeration porosity (Ap), Bulk density (Bd), saturated hydraulic conductivity (K<sub>θ</sub>), field capacity (θfc), permanent wilting point (θpmp), available water (θaw), particle size and the degree of flocculation (DF). Data were analyzed using analysis of variance and principal component analysis. The soil under Forest presented physical quality of the soil superior to much of the evaluated treatments, however, substantial physical improvements were observed in the soil under Massai grass, <em>Urochloa decumbens</em> and <em>Urochloa decumbes</em> + corn. It is concluded that the macroporosity, saturated hydraulic conductivity and aeration porosity attributes are being used by the integrated agricultural production systems.</p> Pedro Luan Ferreira da Silva Flávio Pereira de Oliveira Walter Esfrain Pereira Adriana Ferreira Martins João Henrique Zonta André Julio do Amaral Danillo Dutra Tavares Alison José da Silva Copyright (c) 2021 Revista Brasileira de Engenharia de Biossistemas 2021-12-17 2021-12-17 15 4 598 616 10.18011/bioeng2021v15n4p598-616 EVALUATION OF DIFFERENT SOURCES OF NITROGEN IN COFFEE CULTURE <p>The nutritional balance of the coffee tree is essential to achieve high yields. Nitrogen is the nutrient most demanded by the coffee crop, being its supply most used from sources of urea, which is subject to losses by ammonia volatilization when applied without incorporation or low levels of moisture in the soil. Therefore, we sought to evaluate the effects of different nitrogen sources with different technologies, in coffee fertilization on the productivity of Arabica coffee plantations. For this, the cultivar Catucai Amarelo 24/137 was used, and five nitrogen sources were used: complexed urea, conventional urea, controlled-release urea, blend of controlled-release urea with protected urea and protected urea. It is concluded that the use of conventional urea in installments provided the greatest accumulation of foliar nitrogen, and the controlled-release urea resulted in the greatest production.</p> Elber Augusto Caixeta Kleso Silva Franco Junior Giselle Prado Brigante Marcio de Souza Dias Marco Antônio Pereira de Avila Copyright (c) 2021 Revista Brasileira de Engenharia de Biossistemas 2021-12-17 2021-12-17 15 4 617 631 10.18011/bioeng2021v15n4p617-631 USE OF PEQUI PULP RESIDUAL PIE FLOUR (Caryocar coriacium Wittm) IN THE DEVELOPMENT AND CHARACTERIZATION OF SEQUILHO CRACKERv <p>The pequi tree <em>Caryocar Coriacium</em> Wittm is a species of socioeconomic interest and a source of raw material for culinary, medicinal and industrial purposes. The objective of this work was to elaborate and characterize, in physical-chemical terms, a dry biscuit with the addition of pequi pulp flour. In the formulation of the sequilho used different proportions of flour. Physicochemical analyzes of the flour found the following values: moisture (5.11%), acidity (1.52%), pH (4.10), carbohydrates (59.10%), lipids (23.50%), proteins (10.76%), fibers (6.10%) and ash (2.44%). The following values ​​were found in the analysis of the sequilhos: humidity (4.99 to 9.10%), acidity (1.10 to 1.63%), pH (6.84 to 7.14), carbohydrates (65.42 to 75.72%), lipids (14.72 to 18.54%), proteins (5.37 to 9.18%), fibers (0.20 to 0.58%), ash (0.20 to 0, 43%) and total energy value (131.26 to 139.88 Kcal/100g). The results indicate the flour as an ingredient to be incorporated in the elaboration of sequilhos, which, in turn, presented peculiar nutritional and energetic characteristics.</p> Erlânio Oliveira de Sousa Anália Maria Moreira dos Santos Ana Milene da Silva Duarte Maria Tamires Gonçalves da Silva Copyright (c) 2021 Revista Brasileira de Engenharia de Biossistemas 2021-12-17 2021-12-17 15 4 632 643 10.18011/bioeng2021v15n4p632-643 EFFECTS OF DIFFERENT ORGANIC MATERIAL SOURCES ON SOIL FERTILITY AND MOISTURE <p>Soil is a resource of fundamental importance for agriculture, one of its functions being the balanced supply of nutrients to plants. One of the ways to make the soil sustainable is by applying organic matter, which can be of animal or vegetable origin. The objective was to evaluate the effect of adding different organic materials to the soil in relation to its fertility and moisture. Conducted an initial analysis to analyze soil fertility. Then the area was divided into plots and the treatments were applied, which consisted of 40 ton ha<sup>-1 </sup>cattle manure, 5 ton ha<sup>-1</sup> poultry manure, 53 ton ha<sup>-1</sup> swine manure, 30 ton ha<sup>-1</sup> coffee straw and 0 ton ha<sup>-1</sup> organic material (control). After 90 days, samples were taken from this soil to analyze its fertility and moisture. The treatments that best contributed to its fertility were swine and cattle manure and the treatment that retained more moisture was coffee straw.</p> Daniela Fernanda Alves Kleso Silva Franco Junior Giselle Giselle Prado Brigante Márcio de Souza Dias Natália Scalco Ferreira Copyright (c) 2021 Revista Brasileira de Engenharia de Biossistemas 2021-12-17 2021-12-17 15 4 644 659 10.18011/bioeng2021v15n4p644-659 GERMINATION OF WEED SEEDS SUBMITTED TO THE ACCELERATED AGING TEST <p>The study aimed to analyze the effect of accelerated aging on weed seed germination. The experiment was carried out in the laboratory, with a completely randomized design with five aging periods (0, 24, 36, 48 and 72 hours) and five replications. Evaluations were carried out in four species (<em>Cenchrus echinatus</em>, <em>Digitaria horizontalis</em>, <em>Amaranthus viridis</em> and <em>Ipomoea grandifolia</em>). Seeds were aged at a constant temperature of 42±2°C. The electrical conductivity, germination and germination speed index were analyzed. The results were subjected to analysis of variance, regression analysis and correlation. There was an increase in electrical conductivity due to the accelerated aging time for <em>D. horizontalis</em>, <em>A. viridis</em> and <em>I. grandifolia</em>. <em>A. viridis</em> seeds showed a reduction in germination due to accelerated aging. <em>I. grandifolia</em> seeds show greater germination when subjected to accelerated aging.</p> Gustavo Soares Wenneck Vinicius Villa e Vila Reni Saath Roberto Rezende Copyright (c) 2021 Revista Brasileira de Engenharia de Biossistemas 2021-12-17 2021-12-17 15 4 660 671 10.18011/bioeng2021v15n4p660-671