Full text
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| Author(s): |
Marcelo Romano Modolo
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: | 2002-06-28 |
| Examining board members: |
Luiz Antonio Daniel;
Tsunao Matsumoto;
Marcelo Zaiat
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| Advisor: | Luiz Antonio Daniel |
| Abstract | |
The wastewaters containing high concentrations of lipids, cause problems to the conventional units of treatment being able to produce highly biodegradable sludge and systems with low organic matter removal. In order to study the possibility of obtaining high efficiencies of organic matter removal in the treatment of wastewater with high contents of lipids, it was used in the present research an alternative procedure of treatment named combined system, composed of an enzymatic reactor (R1) and an activated sludge reactor (R2). In order to achieve the pre-hydrolysis of the affluent lipids, the enzymatic reactor, containing the lipase enzyme LIPOLASE 100T immobilized in polyethylene support, was installed preceding the activated sludge. Parallely, it was built another unit of activated sludge (Rc) similar to the first, but without the enzymatic reactor coupled, named control system, in order to enable the comparisons of the results obtained. The experimental unit was operated during 94 d, in continuous operation, with the temperature around 30°C. The activated sludge reactors, R2 and Rc, were operated, respectively, with hydraulic time residence of 8 h and flow rate of 3,4 L/d. The average efficiencies of removal raw COD obtained were respectively, of 85% and 79% for the combined and control systems. The average efficiency of removal of oil and greases of the combined system was of 91%, while for the control system the average efficiency was of 84%. So, the results obtained in this present work, showed that the advantages obtained with the use of the proposed system, under the specific conditions of the present research, were significant. (AU) | |