Encontro de Energia no Meio Rural
Agrener

Abstract

COELHO, Suani Teixeira, VELAZQUEZ, Sílvia Maria Stortini González, SILVA, Orlando Cristiano da et al. Geração de energia elétrica a partir do biogás proveniente do tratamento de esgoto. In Proceedings of the 6. Encontro de Energia no Meio Rural, 2006, Campinas (SP, Brazil) [online]. 2006 [cited 16 April 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022006000100070&lng=en&nrm=iso> .

The main objective of the effluent treatment is to correct its undesirable characteristics, however, during this process, residues like sludge and biogas are generated, and those residues can be used as raw materials. The PUREFA (Program of Rational Energy Use and Alternative Sources), compound by 14 purposes, is about a project of the USP - University of Sao Paulo, financial backer FINEP - Financier of Studies and Projects. This project had three main objectives: to implant measures of management and action of energy efficiency, to increase the distributed generation in the USP from the renewable resource and not conventional energy and to introduce incentive permanent politics to the efficient and rational use of energy. In the context, the Brazilian Reference Center on Biomass was responsible for two purposes, related to the biogas use for electricity generation. The first purpose had main objective to implant the generation system, to capture and to stock the biogas, produced by biodigestor in the Technological Hydraulically Center (CTH - USP). The biodigestor is a UASB (Upflow Anaerobic Sludge Blanket), whose outflow of the biogas produce is near 4 m³/day, opera rates 24 hours per day and utilize the sewer from the residential buildings located in Sao Paulo University, inside the campus. For the biogas utilization, was made its outflow, chemical composition and heat value identifications, parameters that allowed to determinate the real potential for generation and to shown the necessity of the previous treatment, as H₂S removal. Finished this stage, was started the next purpose, regarding biogas used as fuel for electricity generation using a generator group Otto cycle. Nowadays this project is a demonstrative project. In this article the technical and environmental project results obtained will be presented.

Keywords : biomass; biodigestor; purification system; electric energy generation.