Simultaneous biodegradation of nonylphenol ethoxylated and linear alkylbenzene sul...
INFLUENCE OF THE RATIO C/N AND C/R ON THE PRODUCTION OF HYDROGEN IN ANAEROBIC FLUD...
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Author(s): |
Cristiano Luchesi Niciura
Total Authors: 1
|
Document type: | Doctoral Thesis |
Press: | São Carlos. |
Institution: | Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) |
Defense date: | 2005-06-24 |
Examining board members: |
Jose Roberto Campos;
Antonio Eduardo Giansanti;
Valeria Del Nery;
Marco Antonio Penalva Reali;
Edson Luiz Silva
|
Advisor: | Jose Roberto Campos |
Field of knowledge: | Engineering - Sanitary Engineering |
Indexed in: | Banco de Dados Bibliográficos da USP-DEDALUS; Biblioteca Digital de Teses e Dissertações - USP |
Location: | Universidade de São Paulo. Biblioteca da Escola de Engenharia de São Carlos; EESC/TESE-EESC; N632a |
Abstract | |
The present research had as objective the assessment of granulated tread of scrap tires (GTST) as support for the development of biofilms in an expanded bed anaerobic reactor (EBAR), in full scale, with a total volume of 32m3, employed for wastewater treatment. The use of this material as support was presented as an innovating proposal, with a high application potential. To start up the system 6.0m3 of sludge coming from the UASB reactor from Jardim das Flores Wastewater Treatment Plant, Rio Claro SP, were used. The apparent dynamic equilibrium was reached 80 days after operating start up. GTST showed itself as efficient in the packing of the EBAR, where it removed an average of 70% of organic matter, in terms of BOD (non-filtered samples), when operated with hydraulic detention time of 3.2h, mean ascension velocity of 5.7m/h (without effluent re-circulation), and mean volumetric organic load of 5.4kgCOD/m3.day. The mean suspended solids removal in the system was of 65% (with 95mg/L of residual content in the effluent) and the percent of methane in biogas was close to 65%. Likewise in other anaerobic reactors, it was seen that nitrogen and phosphorous removal in the EBAR was relatively low, with values below 10%. Headloss was also assessed in the bed of the GTST, where extremely low values were obtained for all tested granulometry, around 4cm/m in the bed. In the preliminary essays, it was verified that the equivalent diameter of GTST particles was of 4.3mm, with disuniformity coefficient of 1.61 and specific mass of 1.14g/cm3. GTST was also competitive in the economical aspect, where the acquisition cost was 12.8 times lower than granular activated carbon and 1.6 times higher than sand (materials commonly used as EBAR packing material). (AU) |