[Prodeq-divulgacao] ENCONTROS COM A CIÊNCIA DO CIEPQPF (Dep. Eng. Química, FCTUC) - PROGRAMA 2014 e PRIMEIRA SESSÃO

[Fernando Bernardo]

(Desculpas para aqueles que recebem em duplicado)

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PRIMEIRA SESSÃO DOS ENCONTROS COM A CIÊNCIA 2014

9 Abr2014, 14h15-15h15
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Os Encontros com a Ciência do CIEPQPF, Departamento de Engenharia 
Química, Universidade de Coimbra estão de volta! Anexo programa completo 
para 2014, com 8 sessões previstas dentro do leque alargado de 
interesses do nosso centro de investigação. representados. A primeira 
sessão é já _*na próxima quarta-feira*_, com a Ana Sofia Fajardo 
(abstract segue abaixo). Não percam. No sítio e hora do costume. Até lá,

Fernando Bernardo


*Electrocoagulation: a new approach to treat wastewaters*

*Ana Sofia Fajardo*
Olive mill wastewaters are mainly produced in Mediterranean countries 
and contain phenolic mixtures in their composition. These compounds 
incorporate a significant contaminant load due to their high toxicity, 
refractory character and high stability in water. These factors do not 
allow an efficient application of biological treatments so that the 
recourse for chemical purification methods is requested before the 
effluents' discharge into the aquatic environment.

Electrochemical processes appear as interesting alternatives to 
conventional systems to treat wastewaters, allowing a great efficacy in 
the removal of organic compounds. Among these technologies is 
electrocoagulation (EC), easy to operate, requiring low equipment costs, 
not needing high temperature and pressure. In the EC system, sacrificial 
anodes dissolve into the aquatic medium leading to the generation of 
metal ions which are hydrolysed to produce metal hydroxide ions. The 
in-situ generation of coagulants has the advantage of not being required 
the introduction of chemical reagents to the system.

The electrocoagulation process has begun to be successfully applied to 
the treatment of olive mill wastewaters with the aid of anodes of 
aluminium or iron material.

The main objective of this research was to compare the effect of Al, Fe, 
Cu, Pb and Zn anode materials on the treatment of a mixture of six 
phenolic acids usually present in olive mill wastewaters. The assessment 
of their activity is given in terms of Total Phenolic Content (TPh), 
Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD_5 ) removal 
and effluent toxicity. Furthermore, the dissolution of electrodes and 
the electrical energy consumption will also be attained. During the 
treatment process, it seems that beyond the electrocoagulation route, 
the electrooxidation of organic compounds is possibly to occur since the 
results appear to indicate the formation of by-products more 
recalcitrant than the parent substances.

The electrochemical alternative used in this research opens the 
possibilityof integration with other techniques to improve the 
performance of the depuration systems.

Fernando Pedro Martins Bernardo
Assistant Professor
Department of Chemical Engineering
University of Coimbra

Pólo II - Rua Sílvio Lima
3030-790 Coimbra
Portugal
Tele: +351-239-798722
Fax: +351-239-798703
bernardo at eq.uc.pt
www.eq.uc.pt/~bernardo



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