CHARACTERIZATION AND EVALUATION OF SEWAGE AND INDUSTRIAL SLUDGES AS BIOMASS IN THE ENERGY GENERATION PROCESS
Abstract
In order to use as fuel in the energy generation, samples of sludge from treatment plants of effluents (sewage and of pulp and paper and textile industries) were characterized by elemental analysis (CNHS) and approximate analysis (total solids, humidity, volatiles solids and ash content) and calorific value and their thermal behavior by thermogravimetric (TGA) and differential thermal (DTA) analysis simultaneously under combustion (oxidative atmosphere) and under pyrolysis (inert atmosphere). The samples of sewage and textile sludge demonstrated similarity in the elemental composition and aproximate analysis, whereas the pulp and paper sludge showed an organic content and volatile solids greater than the other. The calorific value of the samples showed average value of 19 MJ/kg. From DTA it can be observed that in both combustion and pyrolysis, between 200 and 600 oC, the samples had similar thermal behavior with significant release of energy. According to TGA results under the conditions of combustion, the sample of sludge from pulp and paper industry presented greater thermal stability than the other and all samples showed lower percentage of residue in the end of this process than in pyrolysis. Keywords: biomass, sewage and industrial sludges; energy generation.Downloads
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Published
2009-07-29
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