The incorporation of oil base mud cutting from drilling operations within the manufacture of clay bricks, is considered as one alternative for reuse and final disposal of the OBMC. To evaluate such alternative, on site OBMC amended bricks were produced (15000 bricks at Plant “A”, in Rio Bonito, RJ, and 4000 bricks at Plant “B”, in Jundiai, SP). Plant “A” produces 100000 bricks per day, and Plant “B” 40000; in both plants the cuttings were added in controlled amounts to the normal clay used in the manufacture process. The on-site experiments included the production of conventional bricks, 2.5% and 5% amended bricks. The laboratory tests included:–properties, leachate, and solubilization tests of the cuttings;–leachate and solubilization tests of the normal and OBMC bricks;–compression strength of the normal and OBMC bricks. The paper describes the process employed in the brick manufacture and the laboratory experiments. It also presents the properties of the OBMC bricks, and the benefits to both the manufacturer and to environmental control programs.
Diante da busca do consumidor por produtos com elevado valor nutricional e com praticidade no consumo, o presente estudo teve como objetivo desenvolver um suco misto de frutas e hortaliças (líquido e em pó). O método utilizado foi o de secagem em camada de espuma. Para a formação da espuma, foram adicionados ao suco misto goma arábica e emulsificante, posteriormente a mistura foi agitada em batedeira e conduzida ao secador de bandejas com circulação de ar e temperatura de 60 °C. O suco líquido e seu respectivo pó foram analisados com relação ao teor de água, sólidos solúveis totais, pH, acidez total titulável, açúcares redutores e açúcares não redutores, teor de ácido ascórbico cor (L*, a* e b*), cinzas, cloretos e fibras. Obteve-se um suco em pó com boas características físico-químicas, porém é salutar que estudos complementares sejam realizados, pois observou-se reduções na coloração verde e teor de vitamina C após secagem do suco em camada de espuma.
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