https://ri.ufs.br/jspui/handle/riufs/2443 2026-04-09T13:37:31Z https://ri.ufs.br/jspui/handle/riufs/23647 Título: Estudo comparativo da utilização de resíduo de telhas cerâmicas e Moringa oleifera Lam. como etapa de finalização na clarificação de fermentado de cana-de-açúcar Autor(es): Nascimento, Isabella Santos Abstract: This study investigated the use of ceramic tile waste and the natural coagulant Moringa oleifera Lam. as sustainable and economical alternatives for the clarification of sugarcane alcoholic fermentate, traditionally done with bentonite clays. The ceramic tile waste was characterized through sieve analysis. Moringa seeds were prepared to act as a coagulant. Physical and chemical analyses were conducted on sugarcane juice, fermentate, fermentate with added moringa coagulant, and with added pulverized ceramic residues retained on sieves with mesh openings of 425 µm, 250 µm, 150 µm, and 75 µm. Tests were carried out regarding apparent color, turbidity, pH, total solids, and metals. The treated samples were also analyzed for alcohol content and BET testing. It was observed that all treatments contributed to the clarification of the sample, with emphasis on ceramic residues RC #425 µm and RC #250 µm, which demonstrated greater efficiency in reducing turbidity and apparent color. The treatment with Moringa, although effective in impurity removal, showed the greatest increase in electrical conductivity, indicating a significant release of soluble salts. Treatments with fermentation maintained relatively stable pH and conductivity values, acting moderately on the analyzed parameters. The combination of both materials demonstrated efficiency in clarification, resulting in a cleaner fermentate with lower environmental cost. This process aligns with SDG 12 (Responsible Consumption and Production), showing itself as a promising and viable alternative for the alcoholic beverage industry and the biofuel sector. 2025-08-27T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/21156 Título: Síntese e caracterização de carvão ativado de vagem de Moringa Oleifera Lam e avaliação do seu desempenho na remoção de óleos e graxas Autor(es): Bispo, Mirele dos Santos Abstract: The high volume and chemical composition of oily wastewater produced by the petroleum industry are a major problem in this sector, because .improper waste disposal may result in high ecological damage. Therefore, the treatment of this water is highly important, with many techniques being applied in the industry. A very widespread and effective technology used in water treatment contaminated by organic compounds is adsorption. In this context, this study investigated an application of three activated carbons in the removal of oil and grease present in the produced water. The precursor material was the Moringa oleifera Lam and the influence of activating agents such as zinc chloride (ZnCl2), phosphoric acid (H3PO4) and sodium hydroxide (NaOH) was investigated. The adsorbents obtained were characterized by the ash content, elemental analysis (CHN), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and thermogravimetric analysis (TG / DTG). The kinetic study showed that the equilibrium was reached around 10 minutes for all activated carbons. Additionally, the adsorbents were better represented by the pseudo-second order kinetic model. The sodium hydroxide activated carbon showed an unfavorable behavior to adsorption, while the phosphoric acid activated carbon showed a favorable behavior with adsorption capacity of 294.41 mg g-1 and removal efficiency equal to 95%. In addition, its chemical equilibrium was described by Langmuir isotherm, suggesting chemical adsorption. Freundlich isotherm adjusted well to experimental adsorption data for zinc chloride activated carbon, achieving a reduction in oil and grease content of 95%. The study indicated a great applicability potential of activated carbon with phosphoric acid for the removal of oil and grease from the studied effluent. 2019-12-17T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/21155 Título: Projeto, construção e avaliação da performance de um secador solar híbrido para a secagem de entrecasca de mandioca Autor(es): Andrade, Keyse Santos Abstract: The cassava inner bark is a starch-rich residue, which allows its application in several areas. It also has great potential for the production of biofuels, such as bio-oil, biogas or biochar. However, the proper use of this biomass is hindered due to its high moisture content, thus requiring drying as a pre-treatment operation. Despite numerous studies on the drying of different types of biomass, information regarding cassava peel is scarce in the literature. In the search for efficient drying technologies that can add value to cassava processing waste at competitive costs, solar drying emerges as a green, sustainable and economically viable technology. Within this context, the objective of this work was to construct and evaluate the performance of a solar dryer operating in active and indirect modes, as well as in a hybrid mode, where forced convection of air heated by solar energy is combined with infrared radiation (IR) for drying cassava inner bark. The performance of the dryer was analyzed in terms of the drying kinetics of the biomass and the efficiencies of the solar collector and the drying process itself. Two air velocities, 1.3 and 3.7 m/s, were used in both operating modes. In the hybrid mode, the power of the infrared radiation source was 50 W. During the experiments, solar irradiation intensity, collector temperature, air temperatures, and relative humidities along the dryer, as well as biomass mass and temperature, were measured. The collector temperature, air temperatures and relative humidities showed consistent values, following the behavior of solar irradiation. The forced airflow over a corrugated aluminum absorber plate promoted an increase in air temperature between 5.2 and 13.7°C, with the highest heating observed at 1.3 m/s, although the collector efficiency and drying rate were lower. The use of infrared radiation as an auxiliary heating source reduced drying time but increased energy consumption, leading to lower efficiency in the hybrid drying mode. Thus, in terms of cost and efficiency, the best performance of the developed solar dryer was achieved in the indirect-active mode, with an air velocity of 3.7 m/s, where a target moisture content of approximately 15% (wet basis) was reached in 260 minutes of drying, with an efficiency of 10.5%. 2024-08-30T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/21153 Título: Controle plantwide do processo Tennessee Eastman empregando lógica fuzzy Autor(es): Santos, Félix Rezende Abstract: When the term Plantwide Control is used, it is to identify how variables can be manipulated, what associations can be made between them and how to control the plant as a whole in a way that is close to the operational optimum. These questions are important and appear in the daily life of a process engineer, since for most control theories it is assumed that the effective structure of sensors and actuators is provided and the operations involved in an industrial plant can be analyzed individually, without considering the interaction between them, which is not always true in a chemical industrial plant. The study of Plantwide control is of great importance mainly in the chemical transformation industry, where the presence of interdependent phenomena can cause problems in both production and industrial safety. These phenomena must be taken into account when aiming to create a safe control loop that avoids instabilities, as is the case of the snowball effect caused by the increase in temperature impacting the rate of chemical reaction of exothermic reactions. The present work seeks to replace classic PID control strategies used in the literature for controllers based on fuzzy logic. This modification aims to improve parameters of the industrial process, since the Tennessee Eastman Process (TEP) have different nonlinearities and has the potential for numerous control strategies. After that, from the plantwide control methodology, the process performance index will be evaluated. The designed controllers were build using the fuzzy Mamdani method and controlled the process more effectively, decreasing the pressure variability by 42.4% and reducing the amount of product loss in the purge by 8.2% when compared to classical PID controllers commonly used in the literature. For this comparison, several performance indicators will be applied, such as the IAE, the control effort and the quantification of product lost in the purge. 2022-08-21T00:00:00Z