Elaboração de banco de dados das ETE’s de esgoto sanitário na região metropolitana de Belém para fins de planejamento e operação envolvendo fase líquida, sólida e gasosa

Abstract

The present technical work consisted in the elaboration of a data bank of the wastewater treatment plant (WWTP's) of the metropolitan region of Belém (RMB) for planning and operation purposes involving the liquid, solid and gaseous phases, for the removal of carbonaceous matter. Such a study covers only the municipalities of Ananindeua, Belém and Marituba, which in 2019 have sanitary sewage systems (SES) of the centralized (SES-C33.35%) and decentralized (SES-D5.45%) types involving 23 WWTP's and whose experimental stages of this work are: 1) photographic record of the area occupied by the ETE's; 2) systematization of the basic information of the WWTP's; 3) quantification of the generation of solid by-product of the preliminary treatment; 4) balance of organic loads in UASB reactors; 5) quantification of production and sanitation of sludge in UASB reactors; 6) Potential quantification of electric power generation (EE) and methane emission from UASB reactors. Likewise, among the main results obtained in this work, it was obtained that the spatial distribution was 5.0 WWTP's (21.74%) in Ananindeua, 17 WWTP's (73.91%) in Belém, and 1.0 WWTP's (4, 35%) in Marituba, which is treating the project's average volume of 1,089 L/s (PE of 765,783 inhabitants) will generate in preliminary treatment about 840.17 kgSSG/d, 3548.2 kgareia/d and 29.53 kgscuma / day, and that when the UASB retors have an average efficiency of 65% and will operate with a total organic load of 4,193 kgCOD/d, they will produce 572.8 kgsludge/d with the potential to sanitize 3,062 kgbiosolids/d by alcaline stabilization, tending to this situation of treatment to the generation of available chemical energy and methane emission two UASB reactors, respectively, of 584.33 kWh/d of EQD and 387.67 TCO2/d through the normalized production of total methane of 59 Nm3 /d PNCH4 , being verified that the WWTP's of SESC in comparison with the WWTP's of SES-D are are the ones with the greatest possibility of using this energy as a source of heat.