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Silicon Carbide-Coated Ceramic Membrane Bioreactor for Sustainable Water Purification

1
Department of Chemical Engineering, Ramaiah Institute of Technology, Bengaluru, Karnataka 560054, India
2
BHEL, Prof. CNR Rao Circle, IISc Post, Malleswaram, Bengaluru, Karnataka 560012, India
*
Authors to whom correspondence should be addressed.
Membranes 2019, 9(4), 47; https://doi.org/10.3390/membranes9040047
Received: 24 January 2019 / Revised: 25 February 2019 / Accepted: 1 March 2019 / Published: 2 April 2019
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Abstract

In the present study, a submerged ceramic membrane bioreactor was used to effectively treat industrial wastewater. The outcome of membrane coatings on the efficacy of the membrane was investigated using a silicon carbide (SiC) coating. The flux data obtained from the study were fitted into two mathematical models, namely, the standard pore blocking model (SPBM) and the complete pore plugging model (CPPM) in order to determine the fouling mechanism. It was observed that the SPBM fit with a minimum coefficient of regression of 0.95, suggesting that particles retained on the pore walls were smaller than the average size of membrane pores. An increase in dissolved oxygen (DO) of up to 225% was noted. The significant improvement of the water quality in terms of DO, chemical oxygen demand (COD) and turbidity of coated membrane emphasizes the fact that the membrane coating increases the efficacy of water treatment in membrane bioreactors. View Full-Text
Keywords: ceramic membrane bioreactor; silicon carbide coatings; water purification; permeate flux, fouling; standard pore blocking model; complete pore plugging model ceramic membrane bioreactor; silicon carbide coatings; water purification; permeate flux, fouling; standard pore blocking model; complete pore plugging model
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Surappanahalli Rajanna, S.; Madhu, G.M.; Madhusoodana, C.D.; Govindarajan, A. Silicon Carbide-Coated Ceramic Membrane Bioreactor for Sustainable Water Purification. Membranes 2019, 9, 47.

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