1. Cross-border network for knowledge transfer and innovative development in wastewater treatment WATERFRIEND HUSRB/1203/221/196 1st HUSRB Students Meeting

2. .. 1st Students Meeting Waterfriend Dairy wastewater treatment by membrane filtration Ádám Veszprémi Bioengineer BSc student Supervisors: Dr. Cecilia Hodúr Dr. Szabolcs Kertész

3. 1st Students Meeting Waterfriend Introduction Dairy industryGenerates dairy wastewater – Huge effluent volumes – High organic content Membrane techniques  Effective alternatives: High flux and rejection rates; no additives  Drawbacks: Fouling & retentate utilisation My scopes

4. Materials and methods MembranesNMWL [Da]Material Ultrafiltration7000PES Nanofiltration240TFC 7.8 cm 500 cm 2 active membrane filtration area UF NF

5. 1st Students Meeting Waterfriend VSEP: Vibratory Shear Enhanced Process Materials and Methods ET 108 COD digester & PC CheckIt photometer (Lovibond, Germany) potassium-dichromate method Teledyne tekmar TOC torch analyzer (USA) Experimental parameters: q Vrec =15 L min -1 ; t=50 ± 1°C

6. 1st Students Meeting Waterfriend Results and discussions: Flux improvements

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9. Results and discussions: Power Demand

10. 1st Students Meeting Waterfriend

11. Results and discussions: Feed and permeate values

12. 1st Students Meeting Waterfriend Concentration experiments Experimental parameters: q Vrec =15 L min -1 ; t=50 ± 1°C

13. 1st Students Meeting Waterfriend Resistances Membrane Porous fouling Gel-layer

14. .. 1st Students Meeting Waterfriend Conclusions Dairy wastewater purification by VSEP UF and NF: - efficient organic load decreasing - significant gel layer distruction by vibration - lower power consumption -Hybrid experiments: -different pretreatments (e.g.: ultrasonic, ozone treatment) - posttreatment methods (e.g.: biogas product) -fouled membranes characterisation by contact angle and SEM measurements Future aims

15. .. 1st Students Meeting Waterfriend Presentation/lecture has been produced with the financial assistance of the European Union. The content of the presentation/lecture is the sole responsibility of University of Novi Sad, Faculty of Technology and can under no circumstances be regarded as reflecting the position of the European Union and/or the Managing Authority. Last slide: Thank you for your kindly attention! Acknowledgement The authors are grateful to the project GVOP-3.2.1-2004-04/0252/3.0 and the RET07/2005 project.