BARBOSA, T. L. A.; http://lattes.cnpq.br/3142790630313101; BARBOSA, Tellys Lins Almeida.
Résumé:
This work aims to study the performance and validation of system with automation to
oily water separation processes with ceramic membranes. It was divided into two
phases: laboratory-scale tests and tests with the system with automation. In the
laboratory-scale tests, experiments to characterize the ceramic membrane were
carried out with deionized water and synthetic effluent, aiming to estimate the
behavior of membranes to assist the developing of the system with automation. To
evaluate the performance of the water-oil separation systems with ceramic
membranes the following parameters were analyzed: permeate flow (J, L/h.m2) and
oil rejection rate. In the experiments with the automatic system the performance was
evaluated in oil-water separating process with ceramic membrane, the synthetic
effluent used followed the same conditions as the benchtop system. The experiments
with synthetic effluent were simulated with oil concentration set at 20 mg/L. It was
observed that the reduction of the permeate flux with the operation time is strongly
dependent of the pressure and emulsified oil content, may be related to
concentration polarization, inherent to membrane separation processes. However,
the reduction of permeate flow was attenuated in the system with automation where
backpulse and blackwash cleaning processes were used. The dispersed phase
rejection rate, for all conditions analyzed, was greater than 97%. The backwash
cleaning system having sodium hydroxide as cleaning agent was not effective to
increase the permeate flow, but the cleaning agent performance was extremely
satisfactory which indicates that the change of the cleaning agent in the process will
increase the flow in the permeate stream. From the experiments carried out with the
system with automation results demonstrate the potential for separation with ceramic
membranes, for oily water treatment.