Bioremediation and biomass production from the cultivation of probiotic Saccharomyces boulardii in parboiled rice effluent
| Autor: | Fabricio Rochedo Conceição, Taiane Meireles, Samantha Vargas, Ângela Nunes Moreira, Larissa Centeno, Lantier Mendes, Emili Griep, Giana Gaboardi, Arthur de Castro Jorge Silva, Diego Gil de los Santos |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Environmental Engineering Sucrose Biomass Management Monitoring Policy and Law complex mixtures 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Bioremediation Waste Management 010608 biotechnology Glycerol Bioreactor Animals Food science Waste Management and Disposal Effluent biology Chemistry Probiotics Chemical oxygen demand food and beverages Oryza General Medicine biology.organism_classification Saccharomyces boulardii 030104 developmental biology Biodegradation Environmental |
| Zdroj: | Journal of environmental management. 226 |
| ISSN: | 1095-8630 |
| Popis: | The parboilization of rice generates 2 L of effluent per kilogram of processed grain. Several methodologies have previously been tested with the aim of reducing the environmental impact of this effluent. The objective of this study was to evaluate the bioremediation of parboiled rice effluent supplemented with sucrose or residual glycerol from the biodiesel during the cultivation of the Saccharomyces boulardii probiotic. In the first stage of the experiment, cultures were grown in orbital shaker, and five media compositions were evaluated: 1) parboiled rice effluent; 2) effluent supplemented with 1% sucrose; 3) effluent supplemented with 3% sucrose; 4) effluent supplemented with 15 g.L−1 of biodiesel glycerol and 5) standard yeast culture medium (YM). The addition of 1% of sucrose generated the most promising results in terms of cell viability, removal of nitrogen, phosphorus and chemical oxygen demand (COD). From these results, four independent cultures were grown in a bioreactor using effluent +1% of sucrose as the medium. This assays generated a mean of 3.8 g.L−1 of biomass, 1.8 × 1011 CFU.L−1, and removal of 74% of COD and 78% of phosphorus. Therefore, the cultivation of Saccharomyces boulardii in parboiled rice effluent supplemented with 1% sucrose may represent a viable method by which the environmental impact of this effluent can be reduced while simultaneously producing probiotic culture for use in animal production. |
| Databáze: | OpenAIRE |
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