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Study of the use of ADM1 model as platform of modeling for different configurations of reactors used in the anaerobic treatment of vinasse

Grant number: 16/21529-8
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2017
Effective date (End): May 31, 2021
Field of knowledge:Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
Principal Investigator:Rogers Ribeiro
Grantee:Pamela Talita Do Couto
Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:15/06246-7 - Biorefinery concept applied to biological wastewater treatment plants: environmental pollution control coupled with material and energy recovery, AP.TEM
Associated scholarship(s):17/25778-5 - Study of the Anaerobic Digestion Model number 1 as a modeling platform for different configurations of reactors used in anaerobic treatment of sugarcane vinasse with sensitivity analysis and statistical validation of the model, BE.EP.DR

Abstract

Over the years it is increasingly growing the search for measures to mitigate and even eliminate the negative effects of waste from production processes of industries, looking viable alternatives to the environmental waste does not affect the environment and human health. The vinasse residue from ethanol manufacturing process, has a high potential pollutant because of its physico-chemical characteristics, such as high concentrations of organic matter, high suspended solids concentration, high demand biochemical of oxygen (BOD), low pH, high corrosiveness and high concentrations of potassium, nitrogen, phosphorus and sulfate. This wastewater may be treated using anaerobic biological reactors, which have the advantage of less energy expenditure when compared to aerobic systems, less sludge generation rates and the possibility of energy recovery due the use of biogas form (hydrogen, methane). However, the technology employed with the use of biogas depends of the treatment system, this is, a system composed for a acidogenic reactor followed by methanogenic reactor (two phase system), biogas will generate two streams, one consisting predominantly of hydrogen and another of methane. In the system made only by a methanogenic reactor (single phase system), as the name say, the gas stream is primarily composed of methane. From the experimental data collected for different conditions, it is important to design mathematical models based on momentum transfer processes, mass and energy, and microbial kinetics in order to allow predictions and simulations of treatment in different scenarios and assess which initial conditions are more relevant to the treatment process. For this, it will be used modeling platform ADM1 that presents many biochemical processes and physicochemical anaerobic digestion. The data modeling in the anaerobic treatment of vinasse with ADM1 platform will be estructured in Matlab, in which the hydrogen production (acidogenic reactor) will be verified first, after that will be verified the methane production (methanogenic reactor) and at the end the production of hydrogen and methane will be verified (acidogenic reactor followed by methanogenic reactor). Following a local and global sensitivity analysis will be performed to optimize the input parameters or despise those who have no influence on the final results, for each of the models. Then, with the final model in hand, this will undergo a statistical validation step using the Maximum Likelihood Method and Chi-square test in order to verify that it is reliably the actual data. Finally, the model predictions for different conditions will be evaluated and, with it, one can predict which scenarios lead to increased production of methane, hydrogen or both.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
COUTO, P. T.; ENG, F.; NAESSENS, W.; NOPENS, I; ZAIAT, M.; RIBEIRO, R. Modelling sugarcane vinasse processing in an acidogenic reactor to produce hydrogen with an ADM1-based model. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v. 45, n. 11, p. 6217-6230, FEB 28 2020. Web of Science Citations: 0.

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