Conversão térmica do lodo da estação de despejo da agroindústria da soja

Abstract

This research aimed to produce biofuels from the heat treatment of soy residues. The pyrolysis of industrial sludge was carried out in order to obtain bio-oil and coal. The waste samples were characterized by the following analytical variables: humidity and kinetic test. The moisture content was determined according to the ASTM D 3173-85 method. The kinetic study was carried out in a greenhouse at two temperatures of 40 and 50ºC. Drying times were 1, 2, 3, 4, 5, 10, 20 and 30 hours. The thermal conversion of the waste was carried out in a fixed bed reactor at a temperature of 500 oC, the system being operated for 30 minutes at a heating rate of 30 ° C / min. During the kinetic test it was observed that after 20 hours in a sample it remained with less than 30% of the initial material in the two treatments used. The bio-oil yield was 45.9%. The pH of the bio-oil was around 4.0. The density of the liquid was 1.1 g / ml. The thermal treatment of the studied residues is an important alternative for the generation of biofuels with commercial and environmental value, replacing fossil fuels and with industrial application as solid and oily materials of renewable character in sustainable production systems.