Banca de QUALIFICAÇÃO: FRANCIELE APARECIDA PLOTASIO DUARTE

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : FRANCIELE APARECIDA PLOTASIO DUARTE
DATE: 16/12/2021
TIME: 13:30
LOCAL: Videoconferência
TITLE:

Vinasse improving by electrodialysis combined with nanofiltration aiming at technical and environmental sustainability.

 

KEY WORDS:

Electrodialysis. Nanofiltration. Potassium. Vinasse.

 

PAGES: 95
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUBÁREA: Tratamento de Águas de Abastecimento e Residuárias
SPECIALTY: Técnicas Avançadas de Tratamento de Águas
SUMMARY:

The sugar and alcohol industries in Brazil have great economic, social and environmental importance, being responsible for most of the occupation in rural areas and renewable and clean energy production. Despite the contribution to socioeconomic growth with the generation of jobs and wealth, this sector also stands out for its high polluting potential. The vinasse, liquid tailings generated in large quantity in the distillation process of fermented sugarcane juice to obtain ethanol, can trigger a number of impacts on the environment when managed incorrectly, as this effluent has high organic load, low pH, high corrosivity and high potassium contents. One of the alternatives that has been most used by the plants, as a way of final disposal of the effluent, is fertigation, which the vinasse is pumped or transported by channels and sprinkled over the sugarcane fields. However, the application of vinasse in agricultural soil was limited by means of standards, because this effluent contained high concentrations of potassium, which may favor the formation of neutrally charged chemical complexes that are easily leached. The complex formed between K+ and NO3- is environmental worrying because nitrate is a major pollutant of water. Therefore, the present study aims to benefit the vinasse in such a way as to extract its potential, contributing to the eco-efficiency of the ethanol production chain. With the idea of reusing resources in a closed-loop concept that is driven by the principle of “circular economy”, where applications of new techniques and best practices help reduce waste generation, boost recycling and reduce the use of inputs virgins, bringing even more sustainability. With this will be used in the proposed processing, the electrodialysis for the dilution of potassium present in the vinasse, adhering the effluent for fertigation. The cathode concentrate of the electrodialysis will be submitted to nanofiltration, while allowing, ate the same time, to recondition the electrolyte solution and generate a solution rich in potassium, can serve as an input for the fertilizer industry. In order to achieve greater efficiency in the processing of the vinasse, the optimal operational conditions of the processes involved will be determined through of the design technique of experiments. The optimization of operating conditions will be carried out in two stages: through an exploratory phase employing factorial planning to investigate the effects of process factors in order to identify its significance; and then by comparative analysis, where the critical values of the conditions of the factors involved will be determined according to the variable response of interest. It is expected that the results of this research provide support for a better understanding of the phenomena that occur throughout the studied processes and serve as a technical subsidy for applications for the processing of vinasse.

 

BANKING MEMBERS:
Presidente - WAGNER GUADAGNIN MORAVIA
Interna - PATRICIA SUELI DE REZENDE
Externo à Instituição - LAURA HAMDAN DE ANDRADE - PUCMinas
Notícia cadastrada em: 14/12/2021 10:56
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