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| Author(s): |
Ricardo Polisaitis Oliveira
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) |
| Defense date: | 2009-04-24 |
| Examining board members: |
José Alberto Domingues Rodrigues;
Eugenio Foresti;
Suzana Maria Ratusznei
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| Advisor: | José Alberto Domingues Rodrigues |
| Abstract | |
This study presents the evaluation of stability and efficiency of two anaerobic sequencing batch reactors for wastewater treatment simulating the effluent from industry of personal care products, one containing immobilized biomass on polyurethane foam (AnSBBR) and external circulation of the liquid phase, and the other with self-immobilized granulated biomass (AnSBR) and mechanical agitation. The AnSBBR was operated in batch and fed batch/batch modes, with cycle time (tc) of 8 h and applied organic loading rates (COVA) of 0.9 and 1.5 gDQO/L.d, treating 2.5 L of liquid medium per cycle. The values of organic matter removal efficiency for filtered samples of effluent were below 71% in batch operations, and over 74% in fed-batch/batch operations. On the other hand, the AnSBR was operated in batch, with tc of 8, 12 and 24 h and COVA of 0.75, 0.50 and 0.25 gDQO/L.d, treating 2.0 L of liquid medium per cycle. The increase of tc resulted in higher values of efficiency for conditions with the same COVA, reaching 77% for a 24-h cycle against 69% for an 8-h cycle. However, there was an efficiency drop at the conditions in which COVA was reduced due to an increase of tc. (AU) | |