Membrane Distillation: Pre-Treatment Effects on Fouling Dynamics

In the research reported in this paper, membrane distillation was employed to recover water from a concentrated saline petrochemical effluent. According to the results, the use of membrane distillation is technically feasible when pre-treatments are employed to mitigate fouling. A mathematical model...

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Bibliographic Details
Published in:Membranes (Basel) 2021-12, Vol.11 (12), p.958
Main Authors: Santos, Paula G, Scherer, Cíntia M, Fisch, Adriano G, Rodrigues, Marco Antônio S
Format: Article
Language:English
Subjects:
Coupling agents
Distillation
Distilled water
Effluents
Entrainment
Filtration
Fouling
Heat
Manufacturing
Mathematical models
membrane distillation
Membrane separation
Membranes
petrochemical effluent
Petrochemicals
pre-treatment
Pretreatment
Standard deviation
water recovery
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Summary:In the research reported in this paper, membrane distillation was employed to recover water from a concentrated saline petrochemical effluent. According to the results, the use of membrane distillation is technically feasible when pre-treatments are employed to mitigate fouling. A mathematical model was used to evaluate the fouling mechanism, showing that the deposition of particulate and precipitated material occurred in all tests; however, the fouling dynamic depends on the pre-treatment employed (filtration, or filtration associated with a pH adjustment). The deposit layer formed by particles is not cohesive, allowing its entrainment to the bulk flow. The precipitate fouling showed a minimal tendency to entrainment. Also, precipitate fouling served as a coupling agent among adjacent particles, increasing the fouling layer cohesion.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes11120958