Global Journal of Science Frontier Research, H: Environment & Earth Science, Volume 22 Issue 1

The population projected in the PMGIRS was made from the analysis of census data and using the geometric method. According to the PMGIRS, this method is most suitable due to the rapid growth of the municipality and its size, with a growth rate of 1.01% per year for the total population and 0.99 % per year for rural population. The geometric method can be used, in most cases, when the municipality is in a phase of accelerated growth, as seen in Jacareí and generally follows the exponential curve. The formula that calculates the projection is given by equations (1) and (2): P = P 0 * q (1) q = (P / P 0 ) ^ ( 1/t-t 0 ) (2) Where: q - geometric growth rate; P 0 - initial population based on the last known census; t 0 - year of the last census; P - final population or that of the desired year; t - desired year (projection horizon). d) Per capita generation of urban solid waste in Jacarei muncipality The per capita generation of solid waste is the daily amount of waste generated by each inhabitant [16]. Based on a survey carried out with the population, the PMGIRS elaborated the projection of demand for the urban solid waste and established short, medium and long-term goals for the amount of waste generated per capita, which are shown in Fig. 5. Fig. 5: Targets per capita for the urban solid waste generation (kg/inhabitant day) [15] The population projection of Jacarei muncipality and the quantities of urban solid waste generated will permit the subsequent calculation of the methane production. The Fig. 6 was elaborated from the data informed in the PMGIRS. Fig. 6: Population projection and waste generation e) Urban solid waste characterization The composition of solid waste is influenced by several factors: number of inhabitants, purchasing power, educational level, habits and people’s custom, climate conditions, changes in the country's economic policy [6]. According to the PMGIRS of Jacarei, which based on data from the Department of the Environment of the Municipality of Jacareí, the characterization of urban solid waste in the municipality is as presented in Table 2. 1 Year 2022 57 © 2022 Global Journals Global Journal of Science Frontier Research Volume XXII Issue ersion I VI ( H ) Energetic Potential of the Biogas from Urban Solid Waste Generated in the Jacareí Municipal Landfill, Brazil

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