http://repositorio.uem.br:8080/jspui/handle/1/1068 Wed, 19 Nov 2025 04:02:58 GMT 2025-11-19T04:02:58Z http://repositorio.uem.br:8080/jspui/handle/1/3690 Título: Utilização de resíduos da indústria galvanotécnica no desenvolvimento e fabricação de blocos de concreto para pavimentação intertravada Autor(es): Sgorlon, Juliana Guerra Abstract: The present work aimed to study the treatment/recycling of solid waste from the electroplating industry in the manufacture of concrete paving blocks, using the technique of stabilization/solidification in cement. Concrete blocks with different residues (blasting dust and galvanic sludge) (2%, 3%, 4%, 5% and 10%) in the substitution of fine aggregate were prepared. The blocks were subjected to physical, chemical, mechanical and microstructural tests for the assessment required to ensure good quality of the blocks, as for ensuring efficient removal/immobilization of contaminants in waste. The results obtained showed that the replacement of fine aggregate by up to 5% of blasting dust and 4% of galvanic sludge did not result in significant losses in the mechanical strength of the parts, nor lead to increased water absorption by the blocks. It has been found by chemical tests, there will be no problems of solubilization or leaching of contaminants during the useful life of the concrete blocks, since the process of solidification/stabilization leaded to physical and chemical immobilization of waste in cement mass. Thus, the use of blasting dust and electroplating sludge in manufacturing concrete paving blocks was feasible and effective, not only presenting itself as an alternative for the recycling and proper waste treatment, but also as a possibility of raw materials economy in the construction business. Wed, 01 Jan 2014 00:00:00 GMT http://repositorio.uem.br:8080/jspui/handle/1/3690 2014-01-01T00:00:00Z http://repositorio.uem.br:8080/jspui/handle/1/6519 Título: Utilização de resíduos da indústria galvanotécnica no desenvolvimento e fabricação de blocos de concreto para pavimentação intertravada Autor(es): Sgorlon, Juliana Guerra Abstract: RESUMO: O presente trabalho teve como objetivo o estudo do tratamento/reaproveitamento de resíduos sólidos provenientes da indústria de galvanoplastia na fabricação de blocos de concreto para a pavimentação, utilizando-se a técnica de estabilização/solidificação em matrizes de cimento. Foram confeccionados blocos de concreto com diferentes teores de resíduos (poeira de jateamento e lodo galvânico) 2%, 3%, 4%, 5% e 10% em subsituição ao agregado miúdo. Esses blocos, posteriormente, foram submetidos a ensaios físicos, químicos, mecânicos e microestruturais para a avaliação, tanto das características necessárias à garantia de boa qualidade dos blocos, quanto para a garantia de uma eficiente remoção/imobilização dos contaminantes presentes nos resíduos. Os resultados obtidos permitiram verificar que a substituição do agregado miúdo por até 5% de poeira de jateamento e 4% de lodo galvânico não acarretou em perdas significativas na resistência mecânica das peças, nem levou ao aumento da absorção de água pelos blocos. Verificou-se ainda, por meio de ensaios químicos, que não haverá problemas de lixiviação ou solubilização de contaminantes no ambiente durante a vida útil dos blocos de concreto, uma vez que o processo de solidificação/estabilização levou à imobilização física e química dos resíduos na massa de cimento. Dessa forma, a utilização da poeira de jateamento e do lodo de galvanoplastia na fabricação de blocos de concreto para pavimentação mostrou-se viável e eficaz, apresentando-se não só como uma alternativa para o reaproveitamento e tratamento adequado desses resíduos, mas também como uma possibilidade de economia de matérias-primas utilizadas no ramo da construção civil; ABSTRACT: The present work aimed to study the treatment/recycling of solid waste from the electroplating industry in the manufacture of concrete paving blocks, using the technique of stabilization/solidification in cement. Concrete blocks with different residues (blasting dust and galvanic sludge) (2%, 3%, 4%, 5% and 10%) in the substitution of fine aggregate were prepared. The blocks were subjected to physical, chemical, mechanical and microstructural tests for the assessment required to ensure good quality of the blocks, as for ensuring efficient removal/immobilization of contaminants in waste. The results obtained showed that the replacement of fine aggregate by up to 5% of blasting dust and 4% of galvanic sludge did not result in significant losses in the mechanical strength of the parts, nor lead to increased water absorption by the blocks. It has been found by chemical tests, there will be no problems of solubilization or leaching of contaminants during the useful life of the concrete blocks, since the process of solidification/stabilization leaded to physical and chemical immobilization of waste in cement mass. Thus, the use of blasting dust and electroplating sludge in manufacturing concrete paving blocks was feasible and effective, not only presenting itself as an alternative for the recycling and proper waste treatment, but also as a possibility of raw materials economy in the construction business Descrição: Orientador: Prof.ª Dr.ª Célia Regina Granhen Tavares; Coorientador: Prof. Dr. Carlos Humberto Martins; Tese (doutorado em Engenharia Química)--Universidade Estadual de Maringá, Centro de Tecnologia, Dep. de Engenharia Química, 2014 Wed, 01 Jan 2014 00:00:00 GMT http://repositorio.uem.br:8080/jspui/handle/1/6519 2014-01-01T00:00:00Z http://repositorio.uem.br:8080/jspui/handle/1/3689 Título: Tratamento de vinhaça utilizando coagulantes naturais Autor(es): Girardi, Franciélle Abstract: The vinasse is a wastewater produced in large quantities in the processing of ethanol from sugar cane. It is produced at the ratio of 11-13 liters of vinasse for each liter of ethanol. Because to the large volume of vinasse generated by distillation of ethanol, various processes have been proposed to achieve of reduction its volume, elimination of polluting their character and their potential. These processes include the use of vinasse as fertilizer and/or to produce of biogas. The objective of the present work is to concentrate the vinasse through processes of coagulation/flocculation. This process can allow the use the thickened sludge as fertilizer or even for production of biogas and reuse the water. In this context there is an alternative process of the coagulation/flocculation which use natural coagulants: chitosan, moringa and tannin, which have the advantage of biodegradability and maintains the appropriate properties of the sludge for fertilizer and biogas production. This work reports experiments of coagulation/flocculation jar-test conducted in at temperature ~25°C, with samples of 200mL of vinasse, varying the concentration of coagulants. Jar-test experiments were carried out with an initial rapid mixing (100 rpm) followed by slowly mixing (50rpm) and then resting for sedimentation. The following parameters were measured for tested samples: color, turbidity, pH, COD, solids and some metals and macronutrient with the supernatant of the samples. The results show that natural coagulants remove about 45% of COD, 93% of color and up to 98% of the turbidity. The solids can be removed over 75%, the metals iron and copper up to 70% and removals of less than 50% were observed for calcium, magnesium, manganese and zinc. For elements related to fertilization NPK (nitrogen, phosphorus and potassium), over 50% of nitrogen and phosphorus will be incorporated into the sludge, while a lower level (30%) of potassium was present in the final sludge. These results emphasis the possible use of this technology for the production of sludge for fertilization of soil and reuse of water. Thu, 01 Jan 2009 00:00:00 GMT http://repositorio.uem.br:8080/jspui/handle/1/3689 2009-01-01T00:00:00Z http://repositorio.uem.br:8080/jspui/handle/1/3685 Título: Tratamento de resíduos frutihortículas Autor(es): Rizk, Maria Cristina Abstract: The organic waste need to be treated and disposed correctly in the environment in order to avoid the different pollution forms and health public problems. So, the aim of the present work, was to study the treatment of the fruit and vegetable wastes (FVW) generated in a local central distribution market for food CEASA (Maringá - Paraná). For this, the anaerobic digestion essays had been performed in batch reactors in pilot scale (70 litter reactor; room temperature; inoculant: sewage slude; monitoring time of 300 days) and in small scale ( 100 mL reactor; 25 oC; inoculants: water, domestic sewage, sewage sludge, swine waste; absence and presence of agitation; monitoring time of 60 days). It also had been done composting essays in six different experiments with monitoring time superior to 100 days, in which it had been added to the FVW the following wastes: sawdust (SA), residue of pruning and weeding (RPW), sugarcane bagasse (SB), soybean cake (SC) and boiler ash (BA). The organic compost produced had been evaluated as organic substrate in the planting of corn. All the processes had been evaluated by physical and chemical parameters. The anaerobic digestion process in pilot scale, as it had been developed, didn't led to an efficient degradation of fruit and vegetable wastes, because there was a low consumption of the volatile fatty acids and the removal of the chemical oxygen demand was very low, approximately 30%. In the small scale anaerobic digestion, it can be said that the best results had been obtained when the fruit and vegetable wastes had been diluted with high proportions of domestic sewage and swine waste, in the tests with agitation. However, although satisfactory results had been obtained the FVW had been got a partial stabilization, and the waste produced in the process couldn't be adequately disposed in the environment. The main results that had been obtained in the composting lead to conclude that this process have been feasible, because it was able to produce organic composts that can be used in agriculture. The composts produced in the pile 2 (50% FVW, 50% RPW), in the pile 5 (50% FVW, 30% SC, 20% RPW) and in the vermicomposting (50% FVW, 50% RPW) had showed adequate characteristics for being commercialized. The organic compost produced in the pile 4 (50% FVW, 30% BA; 20% RPW) had been the compost that produced the bigger biomass of corn, but it hadn't differed statically of the other composts, unless the compost produced in the pile 1 (50% FVW, 50% SA). Thu, 01 Jan 2009 00:00:00 GMT http://repositorio.uem.br:8080/jspui/handle/1/3685 2009-01-01T00:00:00Z