Muthukumaragurubaran.V EXPERIMENTAL STUDIES ON SEPARATION OF PHENOLIC MIXTURES USING SPIRAL WOUND REVERSE OSMOSIS MEMBRANE Name Of Presentation by Mr X Midila. G Ilamathi. T Muthukumaragurubaran.V

INTRODUCTION In normal osmosis process the solvent naturally moves from an area of low solute concentration, to an area of high solute concentration. RO is a separation method that removes many types of large molecules and ions from solutions by applying pressure to the solution when it is on one side of a selective membrane. Reverse osmosis is increasingly used as a separation technique in chemical and environmental engineering for the removal of organic pollutants present in waste water Phenolic compounds present in the waste water creates a serious environmental problems and increasing attention is being for its removal using RO membrane.

Objectives of this study The Objective of this project work is to generate experimental data for separation of binary & tertiary organic mixtures(Phenol, Dimethyl Phenol & cholorophenol) by a spiral wound Reverse osmosis membrane module at varoius operating parameters (Trans membrane Pressure, Feed concentration, Flow rate etc.) The data will be used for further analytical studies like Rejection of “Mixtures” compared to rejection of “Single Compound” by RO membrane. Interaction between the components in the mixtures Interaction between the components and the membrane

SOURCE OF PHENOLIC COMPOUNDS The primary sources of phenolic compound present in industrial effluents are: Petroleum Refineries, plastic manufacturing plants, pharamaceutical industries, coal carbonization and Tar distillation units, Wood Charcoal production unit, coke ovens, Phenolformaldehyde ADVANTAGES OF REVERSE OSMOSIS FOR REMOVAL OF ORGANICS Reverse osmosis is effective in rejecting organic solutes with molecular weights greater than 200 to 300, such as fulvic acids, lignins, humic acids and detergents. Low molecular weight, non polar, water soluble solutes (for example, methanol, ethanol, and ethylene glycol) are poorly rejected.

TYPES POLYMERIC MEMBRANE Spiral wound Tubular Hollow fibre Plate and frame The inorganic membrane types stainless steel Ceramic Membranes SPIRAL WOUND MEMBRANE IS USED FOR low – medium viscosity products compact design large amount of area per element cost effective for high capacity plants low capital and energy plants low replacement cost low permeate pressure needed medium life expectancy  

MEMBRANE STRUCTURE The perma-TFC polyamide RO membrane in spiral wound configuration was used in this study Membrane has an effective area of 0.75m2 and the module length 21” and diameter is 2.5inches Membrane is capable of withstanding PH values in range of 2-12 Pressure up to 20atm and temp. to 50.c

COMPARISON

FLOW SHEET FOR SEPARATION OF PHENOLIC MIXTURES

PROCESS DETAILS Polyamide membrane kept inside a stainless steel cylindrical housing capable of withstanding high pressures. A feed tank of 80 L capacity made of stainless steel is provided for storage and supply of the feed to the system as well as for the collection of the recycled Permeate and Retentate. The feed mixtures of Phenol, Cholrophenol is taken in known ratio The feed mixtures are fed into the feed tank. It is circulated by the circulation pump to prefilter. The prefilter is the filter which installed to remove the suspended impurites. After prefiltration the mixtures are pressurised by high pressure pump.

The prefilter is the filter which installed to remove the suspended impurities. After filtration the mixtures are pressurised by high pressure pump. A pump high pressure pump is capable of developing a pressure up to 300psi The membrane separates Phenol and Cholorophenol as Retentate and more and more amount of water as permeate. The flow rate is adjusted by Rotameter which is placed. The permeate and retentate recycled to feed tank for further concentration. The Rejection Co-effcients of membrane is to be measured by varying inlet pressure and feed concentration of phenolic mixtures The Solvent and solute transport parameters are determined by a graphical procedure using the experimental data’s and its values. Likewise the experimental procedure repeated for other mixtures like Phenol and Dimethyl phenol, Dimethyl phenol and Choloro phenol

References 1.Spiral Wound Reverse Osmosis Membranes for the Recovery of Phenol Compounds- Experimental and Parameter Estimation Studies G. Srinivasan, S. Sundaramoorthy and D.V.R. Murthy Department of Chemical Engineering, Pondicherry Engineering College, Pondicherry, India 2.A Brief Review of Reverse Osmosis Membrane Technology Michael E. Williams, Ph.D., P.E, 3.Yen-Hsiung kiang, Amir A.Metry, Hazardous Waste processing technology,Ann Arbor Science , 1982. p. 351-543. Y.M.Chao, T.M. Liang , Desalination 2008,221, 433–439. Seoung-Hyun Kim et.al.,Korean J. Chem. Eng., 2002,19(5), 895-902. F. A. Nasr, H. S. Doma, H.S. A.Halim, S.A.E.Shafai, Environmentalist 2007, 27,275–286. www.wikipedia.org