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THE SEWAGE BIOGAS AND ITS USE FOR ENERGY GENERATION
Coelho Suani Teixeira, Velazquez Silvia Maria Stortini Gonzalez, Silva Orlando Cristiano, Pecora Vanessa, Abreu Fernando Castro, CENBIO-Brazilian Reference Center on Biomass, Sao Paulo, Brazil
Purpose: The project proposal
of sewage use as fuel to produce electric energy, which
development is a commitment of CENBIO (Brazilian National Biomass
Reference Center), is, in fact, one between other projects
developed by Sao Paulo University Program named PUREFA (Program
of Rational Energy Use and Alternative Sources), which aims to
increase the renewable energy participation in University's
energetic matrix, as well as it allows new perspectives to
renewable energy employment in Brazil. In this context, this
paper presents a pilot project for biogas conversion in Brazil,
developed by CENBIO (Brazilian Reference Center on Biomass), from
Sao Paulo University. The project aims to increase the biogas
conversion efficiency, by using it as fuel to produce
electricity.
The biogas is generated in the Sao Paulo University campus, in a
UASB (Up-flow Anaerobic Sludge Blanket) biodigestor, fed in this
project, with liquid effluents provided by residential buildings,
located in the University, presenting a mass flow rate equivalent
to 3 m3 per hour.
Results: The biogas results from organic material
anaerobic fermentation and its chemical composition depends on
several parameters, such as the biodigestor employed and the kind
of organic material. Anyway, the most important biogas components
are methane (CH4), carbon dioxide (CO2) and
sulfuric components (H2S). The biogas composition is
an essential parameter, because it allows identifying the
appropriate purification system, which aims to remove sulfuric
gases and decreasing the water volume, contributing to improve
the combustion fuel conditions. Other data obtained from biogas
analysis is referent to the low heat value, that combined to the
efficiency and biogas consumption is important to estimate the
electric generation potential.
Conclusion: Nowadays, with the end of this project, it's
used to demonstrate the possibility of energy generation from
biogas. In this article the results obtained will provide
information about biodigestorґs operational conditions, defining
appropriate areas where this project could be applicable. The
most important environmental contribution associated to this
project is the mitigation of greenhouse gases (GHG) emissions,
especially verified trough methane conversion in carbon dioxide,
which presents a dangerous level around twenty five times lower
than methane.
Abreu Fernando Castro, USP — Universidade de Sгo Paulo, IEE/CENBIO — Centro Nacional de Referкncia em Biomassa, Av. Prof. Luciano Gualberto, 1289 CEP 05508-010 — Sro Paulo — SP — Brasil. Phone: (11) 3483 6983. Fax: (11) 3091 2649. E-mail: fcabreudogiee.usp.br
Coelho Suani Teixeira, USP — Universidade de Sгo Paulo, IEE/CENBIO — Centro Nacional de Referкncia em Biomassa, Av. Prof. Luciano Gualberto, 1289 CEP 05508-010 — Sro Paulo — SP — Brasil Phone: (11) 3483 6983. Fax: (11) 3091 2649. E-mail: suanidogiee.usp.br
Pecora Vanessa, USP — Universidade de Sгo Paulo, IEE/CENBIO — Centro Nacional de Referкncia em Biomassa, Av. Prof. Luciano Gualberto, 1289 CEP 05508-010 - Sro Paulo - SP - Brasil. Phone: (11) 3483 6983. Fax: (11) 3091 2649. E-mail: vpecoradogiee.usp.br
Silva Orlando Cristiano, USP — Universidade de Sгo Paulo, IEE/CENBIO — Centro Nacional de Referкncia em Biomassa. Av. Prof. Luciano Gualberto, 1289 CEP 05508-010 - Sro Paulo - SP - Brasil. Phone: (11) 3483 6983. Fax: (11) 3091 264. E-mail: gbntumbodogiee.usp.br
Velazquez Silvia Maria Stortini Gonzalez, USP — Universidade de Sгo Paulo, IEE/CENBIO — Centro Nacional de Refenmcia em Biomassa, Av. Prof. Luciano Gualberto, 1289 CEP 05508-010 — Sro Paulo — SP — Brasil. Phone: (11) 3483 6983. Fax: (11) 3091 2649. E-mail: sgvelazdogiee.usp.br
© Независимое агентство экологической информации
Последние изменения внесены 24.04.07