| Autor: |
Morais NWS; Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Campus do Pici, Bloco 713, Pici, Fortaleza, Ceará, 60455-900, Brazil., Coelho MMH; School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, 21941-909, Brazil., Ferreira TJT; Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Campus do Pici, Bloco 713, Pici, Fortaleza, Ceará, 60455-900, Brazil., Pereira EL; Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Campus do Pici, Bloco 713, Pici, Fortaleza, Ceará, 60455-900, Brazil., Leitão RC; Embrapa Agroindústria Tropical, Rua Dra. Sara Mesquita, 2270, Fortaleza, Ceará, 60511-110, Brazil., Dos Santos AB; Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Campus do Pici, Bloco 713, Pici, Fortaleza, Ceará, 60455-900, Brazil. andre23@ufc.br. |
| Abstrakt: |
Carboxylic acids (CA) are considered high added-value compounds, and their production from wastes has gained economic and environmental notoriety. However, the CA production and kinetic modeling using some agro-industrial wastewaters, such as bovine slaughterhouse wastewater (SHW), are not well reported in the literature. Therefore, the objective of this work was to evaluate the CA production potential using SHW as a substrate under acidogenic conditions and to apply mathematical models to estimate the kinetic parameters of particulate organic matter hydrolysis, soluble organic matter consumption, and CA production. Tests were carried out in quadruplicate batch reactors with a 250-mL reaction volume, with brewery sludge as inoculum and using chloroform (0.05%, v/v) for methanogenesis inhibition. The obtained yield was 0.55 g acids gCOD A -1 , corresponding to 0.76 gCOD gCOD A -1 . The production of caproic acid without the addition of electron donors was achieved. Mathematical models that describe exponential growth, such as the first-order exponential model, cone model, and Fitzhugh model, were the most suitable to describe the production kinetics of CA. Finally, SHW seems to be a promising substrate to be investigated in the carboxylic platform. |
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