Detoxification of Olive Mill Wastewaters by Fenton’s Process

Catalysts

MargaridaJ. Quina¹  RuiC. Martins¹  RosaM. Quinta-Ferreira¹  Eva Domingues¹  João Gomes¹ 

[1] CIEPQP—Chemical Engineering Processes and Forest Products Research Center, Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Rua Sílvio Lima, 3030-790 Coimbra, Portugal;

关键词: Fenton’s reagent;    Advanced oxidation processes;    Olive mill wastewater;    Heterogeneous Fenton’s process;    Photo-Fenton;    Integrated treatment;    Real scale application;   

DOI  :  10.3390/catal8120662

来源: DOAJ

【 摘 要 】

Olive mill wastewaters (OMW) constitute an environmental problem affecting mainly Mediterranean Sea area countries where the olive mill industry is a very important economic sector. The strong impact and management issues of these effluents are mainly due to their seasonality, localized production, and high organic load with high toxic features and low biodegradability. As the olive oil industry is highly water demanding, the search for suitable water recovery strategies requires the development and optimization of advanced treatment technologies. The classical Fenton’s process is an interesting alternative, as it operates at room conditions of pressure and temperature. However, it shows some drawbacks, such as the generation of iron sludges, which require further management. Nevertheless, because of its features that make it industrially desirable, overcoming these limitations has been the focus of researchers in the last years. Bearing this in mind, this paper focuses on the recent research regarding OMW treatment using Fenton’s process. The use of Fenton’s peroxidation treatment at homogenous, heterogeneous, and photo-aided conditions is analysed. The use of solid catalysts may be an interesting way to avoid sludge formation. Light-driven Fenton can also reduce the amount of iron needed for effective degradation. Moreover, Fenton’s process integration in combined treatment schemes is discussed. Finally, remarks regarding its application at full scale are given.

【 授权许可】

Unknown