Abstract
A new hybrid photocatalytic membrane reactor that can easily be scaled-up was designed, assembled and used to test photocatalytic membranes developed using the sol–gel technique. Extremely high removals of total suspended solids, chemical oxygen demand, total organic carbon, phenolic and volatile compounds were obtained when the hybrid photocatalytic membrane reactor was used to treat olive mill wastewaters. The submerged photocatalytic membrane reactor proposed and the modified membranes represent a step forward towards the development of new advanced treatment technology able to cope with several water and wastewater contaminants.
Highlights
The treatment of wastewaters generated by the olive oil industry is a challenge, mainly in Mediterranean Countries
The pre-treated olive mill wastewater collected after sedimentation was characterized and Figure 1 depicts the range and average values obtained for each parameter assessed
Results obtained in the test M.F showed that a reduction of the pore size of the membrane was achieved due to the surface modification
Summary
The treatment of wastewaters generated by the olive oil industry is a challenge, mainly in Mediterranean Countries. Their high content in solids, organic matter and phenolic compounds, make these wastewaters difficult to be treated by traditional methods. Processes such as membrane filtration [1] and TiO2 photocatalysis [2] are alternatives that are being studied to treat these effluents. The antifouling properties of TiO2 are based on its strongly hydrophilic character [10] and ability to catalyze the degradation of organic substances [11], both enhanced in the presence of UV radiation
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