Application of waste polypropylene bags as filter media in coalescers for oily water treatment

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Srđan Sokolović
Arpad Kiralj
Dunja Sokolovic
Aleksandar Jokić


The polypropylene fibers have been used in bed coalescers for separation of micro-sized oil droplets from water for a long time. Possibilities of applying different forms of polypropylene as filter beds are still being in the focus of many researches. The possibility of applying waste polypropylene bags used for packing vegetables (PPDJ) was investigated in this paper. The results are compared with results obtained by applying waste polypropylene fibers from carpet production (PP). It is well known that there are difficulties to separate the oils of low viscosity by polymer fiber beds. Due to the above mentioned, the presented research refers to separation of low viscosity mineral oil from water. The obtained experimental results confirm that the material PPDJ could be efficiently used as a bed material for coalescers. The critical velocity of 50 m h-1 could be reached at using both polypropylene forms that is from bags PPDJ and from the carpet industry PP, when the adequate bulk density of materials is used.


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Sokolović, S., Kiralj, A., Sokolovic, D., & Jokić, A. (2019). Application of waste polypropylene bags as filter media in coalescers for oily water treatment. HEMIJSKA INDUSTRIJA (Chemical Industry), 73(3), 147–154.
Chemical Engineering - Separation Processes


Li Y, Zhang Z, Ge B, Men X, Xue Q. A versatile and efficient approach to separate both surfactant-stabilized water-in-oil and oil-in-water emulsions. Sep. Purif. Technol. 2017; 176: 1-7.

Shannon MA, Bohn P W, Elimelech M, Georgiadis J G, Mariñas B J, Mayes AM. Science and Technology for Water Purification in the Coming Decades. Nature 2008; 452: 301-310.

Šećerov Sokolović RM, Vulić TJ, Sokolović SM, Marinković Nedučin RP. Effect of Fibrous Bed Permeability on Steady-State Coalescence. Ind. Eng. Chem. Res. 2003; 42: 3098-3102.

Han Y, He L, Luo X, Lü Y, Shi K, Chen J, Huang X. A review of the recent advances in design of corrugated plate packs applied for oil–water separation J. Ind. Eng. Chem. 2017; 53: 37-50.

Weschenfelder SE, Mello A C, Borges CP, Campos JC. Oilfield Produced Water Treatment by Ceramic Membranes: Preliminary Process Cost Estimation. Desalination 2015; 360: 81-86.

Spielman LA, Goren S L. Theory of Coalescence by Flow through Porous Media. Ind. Eng. Chem. Fundam. 1972a; 11: 66-72.

Spielman LA, Goren SL. Experiments in Coalescence by Flow through Fibrous Mats. Ind. Eng. Chem. Fundam. 1972b; 11: 73-83.

Spielman LA, Cukor PM. Deposition of Non-Brownian Particles under Colloidal Forces. J. Colloid Interface Sci. 1973; 43: 51−65.

Šećerov-Sokolović RM, Sokolović SM. Dispersion in Porous Beds. Hem. Ind. 2004; 58: 49−54. (in Serbian)

Šecerov Sokolović RM, Sokolović DS, Govedarica DD. Liquid-liquid separation using steady-state bed coalescer. Hem. Ind. 2016; 70: 367-381.

Sokolović DS, Govedarica DD, Šećerov-Sokolović RM. Influence of fluid properties and solid surface energy on efficiency of bed coalescence. Chem. Ind. Chem. Eng. Q. 2018; 24: 3: 221-230.

Dawar S, Chase GG. Correlations for transverse motion of liquid drops on fibers. Sep. Purif. Technol. 2010; 72: 282-287.

Hu D, Li X, Li L, Yang C. Designing high-caliber nonwoven filter mats for coalescence filtration of oil/water emulsions. Sep. Purif. Technol. 2015; 149: 65-73.

Tufenkji N, Elimelech M. Correlation equation for predicting single-collector efficiency in physicochemical filtration in saturated porous media. Environ. Sci. Technol. 2004; 38: 529-536.

Andan S, Hariharan S I, Chase GG. Continuum model evaluation of the effect of saturation on coalescence filtration. Separ. Sci. Technol. 2008; 43: 1955–1973.

Sareen SS, Rose PM, Gudesen RC, Kintner RC. Coalescence in Fibrous Beds. AIChE J. 1966; 12: 1045-1050.

Sharifi H, Shaw J. Secondary Drop Production in Packed-Bed Coalescers. Chem. Eng. Sci. 1996; 51: 4817-4826.

Li J, Gu Y. Coalescence of Oil-in-Water Emulsions in Fibrous and Granular Beds. Sep. Purif. Technol. 2005; 42: 1−13.

Kulkarni PS, Patel SU, Patel SU, Chase GG. Coalescence filtration performance of blended microglass and electrospun polypropylene fiber filter media. Sep. Purif. Technol. 2014; 124: 1-8.

Chawaloesphonsiya N, Painmanakul P. Study of Cutting-Oil Emulsion Separation by Coalescer Process in Terms of Medium Characteristics and Bed Packing. Separ. Sci. Technol. (Philadelphia), 2014; 49: 18: 2960-2967.

Šećerov Sokolović RM, Govedarica DD, Sokolović DS. Selection of filter media for steady-state bed coalescers. Ind. Eng. Chem. Res. 2014; 53: 2484-2490.

Krasinski A, Wierzba P. Removal of Emulsified Water from Diesel Fuel Using Polypropylene Fibrous Media Modified by Ionization during Meltblow Process. Sep. Sci. Technol. 2015; 50: 1541-1547.

Govedarica DD, Šećerov-Sokolović RM, Kiralj AI, Govedarica OM, Sokolović DS, Hadnađev-Kostić MS. Separation of Mineral Oil Droplets Using Polypropylene Fibre Bed Coalescence. Hem. Ind. 2015; 69: 339-346.

Official Gazette of the Republic of Serbia, "Water Law", no. 30, 2010.

Official Gazette of the Republic of Serbia, "Regulation on emission limit values of pollutants in water and deadlines for their achievement", no. 67 2011, no. 48, 2012.

Clayfield EJ, Dixon AG, Foulds AW, Miller RL. The coalescence of secondary dispersions: I. The effect of wettability and surface Energy. J. Colloid Interface Sci. 1985a; 104 (2): 500–511.

Clayfield EJ, Dixon AG, Foulds AW, Miller RL. The coalescence of secondary dispersions: II. The role of electrokinetic properties in determining coalescence performance. J. Colloid Interface Sci. 1985b; 104 (2): 512–519.

Fahim M, Othman F. Coalescence of secondary dispersions in composite packed beds. J. Dispersion Sci. Technol. 1987; 8 (5-6): 507–523.

Akagi Y, Okada K, Dote T, Yoshioka N. Separation of oil from oil-In-water mixture by glass fiber beds. J. Chem. Eng. Jpn. 1988; 21 (5): 457–462.

Akagi Y, Okada K, Dote T, Yoshioka N. Effect of wettability of glass fiber beds on separation of oil droplets dispersed in water. J. Chem. Eng. Jpn. 1990; 23 (1): 105–108.

Magiera R, Blass E. Separation of Liquid-Liquid Dispersions by Flow through Fibre Beds. Filtr. Sep. 1997; 34 (4): 369–376.

Krasinski A. Filter Media: Multilayer PP Filters for the Separation of O/W Emulsions. Filtr Sep. 2014; 51 (6): 22–28.

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