A biodigestão anaeróbia com uso da manipueira: alternativa energética e sustentável em uma farinheira no município de Cianorte-PR

Abstract

The destination and proper treatment of biomass can be carried out with the use of industrial biodigesters, where, through anaerobic biodigestion, biogas and biofertilizer are obtained. In the case of the flour industry, there is a very large volume of cassava effluent, contaminating residue coming from the cassava press. With this, the study sought to determine the economy of firewood as a substitute for biogas, from the use of cassava in a biodigester for the generation of thermal energy, also verifying the environmental gains with the use of the produced biofertilizer. The study was carried out in a flour industry in the city of Cianorte - PR, where 1 sample of biofertilizer was collected for NPK analysis and quantitative data from the company regarding the use of the biodigester. Also, theoretical research was carried out in journals, scientific articles, websites and magazines, in order to obtain a result on the environmental and economic effects on the flour industries. As a result, after investing in the biodigester, the average consumption of firewood between 2021 and 2022 was reduced by 50.04%. It was also observed that biogas was more energetically advantageous because it has a higher calorific value than firewood, and also presents less CO2 generation when burning the fuel. The biofertilizer sample collected was sent to a private laboratory for environmental and agronomic analysis in the city of Campo Mourão - PR, resulting in 0.9:0.1:4.8 NPK, indicating a suitable biofertilizer for fertirrigation, according to the parameters used in the study. Another important factor was the proper treatment and reuse of industrial waste generated in the industry, showing that it is possible for a flour industry to be self-sustainable and invest in renewable energy to obtain greater economic use integrated with environmental issues.