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Sustainable Power Generation from Salinity Gradient by L-DOPA+TiO2 Modified RO Membrane with Pressure Retarded Osmosis
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  • Nuray Ateş,
  • Seda Saki,
  • Murat Gokcek,
  • Nigmet Uzal
Nuray Ateş
Erciyes Universitesi
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Seda Saki
Abdullah Gul Universitesi
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Murat Gokcek
Niğde Ömer Halisdemir University
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Nigmet Uzal
Abdullah Gul Universitesi

Corresponding Author:[email protected]

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Abstract

In this study, specific energy potential of PRO process using L-DOPA+TiO2 (0.5 and 1 wt%) modified BW30-LE membrane was evaluated on synthetic and real water samples at 5, 10 and 15 bar pressures and 10°C and 20°C and 30°C degrees. Water flux increased by improvement of the surface hydrophilicity and increased roughness on the membrane surface by incorporation of TiO2 nanoparticles with L-DOPA. The maximum specific power was observed as 1.6 W/m2 for L-DOPA+1 wt% TiO2 modified BW30-LE membrane at 15 bar pressure. Mediterranean and Aegean, Black Sea water samples were used as draw solution and Seyhan, Ceyhan, Buyuk Menderes, Gediz, Yesilirmak, and Kizilirmak Rivers were used as feed solution. The highest osmotic power density of 0.70 W/m2 was obtained by using BW30-LE/L-DOPA+1 wt% TiO2 membrane with the Ceyhan River-Mediterranean Sea couple at 10 bar pressure at 30 ± 5°C.