Abstract

VERGARA OJEDA, Christian; QUIROZ, Carolina  and  JEISON, David. APLICATION OF SELF-FORMING DYNAMIC MEMBRANES TO BIOLOGICAL WASTEWATER TREATMENT. Rev. ing. univ. Medellín [online]. 2013, vol.12, n.22, pp.25-32. ISSN 1692-3324.

Even though membrane prices have experienced a notorious decrease during the last years, they still represent an important cost associated with the application of membrane bioreactors (MBR) for wastewater treatment. The operation of MBRs with self-forming dynamic membranes may significantly reduce the associated costs, promoting the application of MBRs. A self-forming dynamic membrane only requires a support material over which a cake layer is formed, that acts as a membrane, which rejects the solids contained in the bioreactor. During the present research 2 sieving meshes of 20 and 100 µm were tested as model materials for the development of self-forming dynamic membranes. Results show that it is possible to support the operation of the reactor in time and to provide a high quality permeate, with turbidity levels below 3 NTU. The employment of a mesh of 100 µm allows to increase the flux but compromises the retention of solids and the removal of organic matter.

Keywords : Wastewater; bioreactor; membrane; filtration; self-forming.

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