Anaerobic co-digestion of sewage sludge and grease trap: Assessment of enzyme addition |
| |
| Authors: | Andres Donoso-Bravo Maria Fdz-Polanco |
| |
| Institution: | 1. Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, General Cruz 34, Valparaíso, Chile;2. INRIA-Chile, Chilean Informatics Research and Innovation Centre (CIRIC), Rosario Norte 555 of. 703, Las Condes, Santiago, Chile;3. Department of Chemical Engineering and Environmental Technology, University of Valladolid, Prado de la Magdalena s/n, 47011 Valladolid, Spain |
| |
| Abstract: | Anaerobic co-digestion of grease trap and sewage sludge from a wastewater treatment plant is evaluated. Enzyme-lipase application, both addition and dosage, are evaluated by fitting the methane production of biochemical potential tests with the first order model. The enzyme addition effect, at 2, 5 and 10% of grease trap (%GT VSFED?1) and the enzymes doses, between 0.25 and 1.67% (v/v), without and with grease trap presence were studied. Grease trap addition showed a negative effect on the waste biodegradability, which was completely overcome by the addition of lipase. Enzyme addition improved notably the methane production for all grease trap fractions studied. In regards to the dosage, the best result was achieved between 0.33 and 0.83% (v/v) of enzyme. The co-digestion of sewage sludge and grease trap may be a feasible process by using lipases due to the saving in operational costs and the increase in the biogas production |
| |
| Keywords: | Co-digestion Grease trap Lipase Methane Modeling Sewage sludge |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
