Much of the construction and demolition waste in the municipality of Belém is generated by large companies. The National Plan for Solid Waste aims to minimize such waste, as well as to reduce expenses with its treatments and final destination, thus benefiting companies, considering a lower cost and better production. The countries' economic growth is accompanied by the expansion of the construction industry; and one of the consequences of this phenomenon is the generation of major environmental impacts, from the extraction of natural resources for the production of inputs, to the production of waste, which is disposed of in the environment without adequate control and management. This study deals with civil construction and demolition waste generated by large companies in the city of Belém, Pará. The objective was to quantify, classify, and present the main problems caused by this waste, with a private company as the object of research. Firstly, data were collected to conduct the research, consulting the collection made available by the Municipality of Belém, the Department of Sanitation and the National Environment Council. Subsequently, questionnaires and interviews were also developed and applied to make the results possible. The data collected in civil construction projects in the metropolitan region of Belém showed a gap in terms of theory and practice in the proper disposal of waste and tailings. Although there is knowledge of the regulations that regulate this process, construction companies do not follow the standardized standards.
Urban development and disordered population growth have caused several negative impacts on natural resources, especially water resources, particularly in terms of water quality and the way they are being managed. This work aims to carry out a study on water characterization, with emphasis on the physical, chemical and biological characteristics of the waters of the Avenida Visconde de Souza Franco channel in the city of Belém-Pará. The analyzed parameters were established in accordance with resolution No. 357/2005 of the National Environment Council (CONAMA), which provides for the classification of bodies of water and the environmental guidelines for their classification, as well as establishing the conditions and standards effluent discharge. In this study, in addition to the parameters of Resolution No. 357/2005, the requirements established by the Environmental Sanitation Technology Company (CETESB) for checking the conductivity in the water body, for the characterization of the waters of the Doca channel, were considered flow into Guajará Bay, Belém-PA. From the analysis of the quality parameters of the water body, it was possible to verify deviations from standards in the physical-chemical and bacteriological characteristics of the Av. Visconde de Souza Franco channel, identifying the irregular discharge of domestic and industrial sewers.
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