Response surface methodology to optimize membrane cleaning in nanofiltration of kraft black liquor
Gespeichert in:
| Titel: | Response surface methodology to optimize membrane cleaning in nanofiltration of kraft black liquor |
|---|---|
| Autoren: | Battestini-Vives, Mariona, Xiao, Xiao, Lipnizki, Frank, Rudolph-Schöpping, Gregor |
| Weitere Verfasser: | Lund University, Faculty of Engineering, LTH, Departments at LTH, Department of Process and Life Science Engineering, Division of Chemical Engineering, Lunds universitet, Lunds Tekniska Högskola, Institutioner vid LTH, Institutionen för processteknik och tillämpad biovetenskap, Avdelningen för kemiteknik, Originator, Lund University, Faculty of Science, Department of Chemistry, Physical and theoretical chemistry, Chemical Physics, Lunds universitet, Naturvetenskapliga fakulteten, Kemiska institutionen, Enheten för fysikalisk och teoretisk kemi, Kemisk fysik, Originator, Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: The Energy Transition, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Energiomställningen, Originator, Lund University, Profile areas and other strong research environments, Lund University Profile areas, LU Profile Area: Light and Materials, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Lunds universitets profilområden, LU profilområde: Ljus och material, Originator, Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: Food and Bio, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Livsmedel och bioteknik, Originator, Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: Water, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Vatten, Originator |
| Quelle: | Separation and Purification Technology Nanofiltration of kraft black liquor. 354 |
| Schlagwörter: | Engineering and Technology, Chemical Engineering, Teknik, Kemiteknik, Materials Engineering, Paper, Pulp and Fiber Technology, Materialteknik, Pappers, massa- och fiberteknik |
| Beschreibung: | Better understanding of membrane fouling and cleaning can help implementation of membrane filtration processes in the pulp and paper industry. The aim of this study was to optimize membrane cleaning in the nanofiltration of kraft black liquor ultrafiltered permeate for the recovery of lignin. This work wants to assess whether the cleaning process removes the main foulants; as well as the economic viability of the optimized cleaning compared to a standard cleaning in a nanofiltration membrane plant on industrial scale. The optimization of membrane cleaning was investigated using the response surface methodology. The factors studied were time, temperature, and cleaning agent (Ultrasil 110) concentration, and flux recovery was used to evaluate the success of cleaning. Experiments were performed on laboratory scale where flat-sheet polymeric membranes were fouled with kraft black liquor ultrafiltered permeate and cleaned using various combinations of the three factors. The model developed predicted a flux recovery of 88 % when cleaning was performed for 60 min with a solution of 0.8 wt% Ultrasil 110 at 40 °C. The flux recovery measured experimentally with these cleaning parameters was 80 %. Scanning electron microscopy combined with energy-dispersive X-ray spectroscopy analysis confirmed that the optimized cleaning removed the main foulants from the membrane surface. Moreover, increasing the cleaning agent concentration or the cleaning temperature did not always lead to a higher flux recovery. The techno-economic evaluation revealed that 16 % of the cleaning costs could be saved by optimizing the cleaning process. |
| Zugangs-URL: | https://doi.org/10.1016/j.seppur.2024.128626 |
| Datenbank: | SwePub |
Full Text Finder 
Nájsť tento článok vo Web of Science | Abstract: | Better understanding of membrane fouling and cleaning can help implementation of membrane filtration processes in the pulp and paper industry. The aim of this study was to optimize membrane cleaning in the nanofiltration of kraft black liquor ultrafiltered permeate for the recovery of lignin. This work wants to assess whether the cleaning process removes the main foulants; as well as the economic viability of the optimized cleaning compared to a standard cleaning in a nanofiltration membrane plant on industrial scale. The optimization of membrane cleaning was investigated using the response surface methodology. The factors studied were time, temperature, and cleaning agent (Ultrasil 110) concentration, and flux recovery was used to evaluate the success of cleaning. Experiments were performed on laboratory scale where flat-sheet polymeric membranes were fouled with kraft black liquor ultrafiltered permeate and cleaned using various combinations of the three factors. The model developed predicted a flux recovery of 88 % when cleaning was performed for 60 min with a solution of 0.8 wt% Ultrasil 110 at 40 °C. The flux recovery measured experimentally with these cleaning parameters was 80 %. Scanning electron microscopy combined with energy-dispersive X-ray spectroscopy analysis confirmed that the optimized cleaning removed the main foulants from the membrane surface. Moreover, increasing the cleaning agent concentration or the cleaning temperature did not always lead to a higher flux recovery. The techno-economic evaluation revealed that 16 % of the cleaning costs could be saved by optimizing the cleaning process. |
|---|---|
| ISSN: | 13835866 18733794 |
| DOI: | 10.1016/j.seppur.2024.128626 |