title: Performance assessment and hydrodynamic analysis of a submerged membrane bioreactor for treating dairy industrial effluent.
abstract: Submerged membrane bioreactor (SMBR) is a relatively advanced technology for waste water treatment that involves integrated aerobic and anaerobic biological processes with membrane filtration. In the present investigation, hydrophobic polyvinylidene fluoride (PVDF) and hydrophilic polyacrylonitrile (PAN) hollow fiber (HF) membranes were tested in an indigenously fabricated SMBR for dairy effluent treatment under aerobic conditions using mixed microbial consortia. Effect of operating parameters such as suction pressure, degree of aeration and trans-membrane pressure (TMP) on membrane performance in terms of flux, rejection of turbidity, BOD and COD besides fouling characteristics was investigated. The observed optimum permeabilities of PVDF and PAN HF membranes were approximately 108 and 115 LMH bar(-1) with high extent of impurity removal. The rejection of COD was found to be 93% for PVDF and 91% for PAN HF membranes whereas corresponding rejection of BOD was observed to be 92% and 86%. A two-dimensional comprehensive model was developed to predict the hydrodynamic profile inside the module. Regression analysis revealed that the simulation results agreed well with experimental data.
authors.affiliation: RMIT-IICT Joint Research Center, IICT, India; Membrane Separations Group, Chemical Engineering Division, Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India.
authors.forename: Praneeth
authors.initials: P
authors.lastname: K
authors.affiliation: Membrane Separations Group, Chemical Engineering Division, Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India.
authors.forename: Siddhartha
authors.initials: S
authors.lastname: Moulik
authors.affiliation: Membrane Separations Group, Chemical Engineering Division, Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India.
authors.forename: Pavani
authors.initials: P
authors.lastname: Vadthya
authors.affiliation: Royal Melbourne Institute of Technology (RMIT), School of Applied Sciences, Melbourne, VIC 3001, Australia.
authors.forename: Suresh K
authors.initials: SK
authors.lastname: Bhargava
authors.affiliation: Royal Melbourne Institute of Technology (RMIT), School of Applied Sciences, Melbourne, VIC 3001, Australia.
authors.forename: James
authors.initials: J
authors.lastname: Tardio
authors.affiliation: Membrane Separations Group, Chemical Engineering Division, Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India. Electronic address: sridhar11in@yahoo.com.
authors.forename: Sridhar
authors.initials: S
authors.lastname: S
mesh_terms: D000180:Acrylic Resins; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D003612:Dairying; D057446:Hydrodynamics; D007220:Industrial Waste; D008567:Membranes, Artificial; D009391:Nephelometry and Turbidimetry; D011145:Polyvinyls; D014865:Waste Disposal, Fluid / Q000379:methods*; D005465:Fluorocarbon Polymers
chemical_list: D000180:Acrylic Resins; D007220:Industrial Waste; D008567:Membranes, Artificial; D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers; C010504:polyacrylonitrile
keywords: Dairy effluent; Flux; Hollow fiber membrane; Rejection; SMBR