| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000308808 |
| ISSN: | 0104-6632 |
| Authors: | Leal, M.C.M.R1 Cammarota, M.C2 Freire, D.M.G3 SantAnna-Junior, G.L |
| Institutions: | 1Universidade Federal do Rio de Janeiro, Instituto Alberto Luiz Coimbra de Pos-Graduacao e Pesquisa de Engenharia, Rio de Janeiro. Brasil 2Universidade Federal do Rio de Janeiro, Escola de Quimica, Rio de Janeiro. Brasil 3Universidade Federal do Rio de Janeiro, Faculdade de Farmacia, Rio de Janeiro. Brasil |
| Year: | 2002 |
| Season: | Abr |
| Volumen: | 19 |
| Number: | 2 |
| Pages: | 175-180 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | An enzymatic extract produced by Penicillium restrictum having a high level of lipase activity (17.2 U.g-1) was obtained by solid-state fermentation using babassu cake as substrate. The enzymatic extract was used in the hydrolysis of a dairy wastewater with high fat contents (180, 450, 900 and 1,200 mg.L-1). Different hydrolysis conditions were tested, and it was determined that it should be carried out at a temperature of 35ºC, without agitation, with 10% v/v enzymatic extract and a hydrolysis time of 12 hours. Both crude and hydrolysed effluents were then submitted to an anaerobic biological treatment. It was observed that for the enzymatically pretreated effluent there was a significant improvement in the efficiency of the anaerobic treatment. For the highest fat content tested (1,200 mg.L-1), removal efficiencies of 19 and 80% were attained for crude and hydrolysed effluents, respectively. In addition, a tenfold increase in the removal rate of COD from the hydrolysed effluent (1.87 kg COD.m-3.d-1) was observed in relation to the crude effluent (0.18 kg COD.m-3.d-1). The results obtained in this study illustrate the viability of using a hybrid treatment (enzymatic-biological) for wastewaters having high fat contents |
| Disciplines: | Ingeniería |
| Keyword: | Ingeniería ambiental, Ingeniería química, Biotecnología, Industria lechera, Tratamiento de aguas residuales, Tratamiento anaerobio, Aguas residuales |
| Keyword: | Engineering, Chemical engineering, Environmental engineering, Biotechnology, Dairy industry, Anaerobic treatment, Waste water |
| Full text: | Texto completo (Ver HTML) |
