Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Treatment of surface water with hydraulically cleaned reverse osmosis modules
This thesis is part of AiRO-project which is performed in co-operation with Vitens, KWR Watercycle Research Institute, Hatenboer-Water and Evides. The commissioning organization of this thesis was Vitens. The objective of the AiRo -project is to study a method to clean vertically positioned spiral-wound reverse osmosis membranes hydraulically with a mixture of air and water. The objective of this thesis was to study if it is possible to treat surface water with hydraulically cleaned membranes and how much pretreatment is required for stable operation. The first part of the thesis is theoretical framework about membrane techniques based on a literature survey. The second part of the thesis is research carried out with a reverse osmosis pilot installation. To study the performance of a hydraulically cleaned reverse osmosis module six short-term experiments were performed with different cleaning frequencies and different pretreatment filter pore sizes. It was found out that treatment of surface water is possible with hydraulically cleaned reverse osmosis modules and hydraulic cleaning is an effective way to clean reverse osmosis modules. After air-water cleaning a reduction was observed in transmembrane pressure and an increase in permeability. Under a high particle load the feed channel pressure drop was reduced efficiently with hydraulic cleaning. According to this study extensive pretreatment is not needed but less pretreatment requires shorter hydraulic cleaning frequency. Also rinsing water quality was studied and it was found out that after 5 minutes of air-water cleaning the rinsing water quality did not compare to the feed water quality. Further research with long-term experiments is suggested to study the pretreatment requirements and performance of hydraulically cleaned reverse osmosis membrane treating surface water, and air-water cleaning time when surface water is used as rinsing water. ; Tämä opinnäytetyö on osa AiRO-projektia, jonka yhteistyötahot ovat Vitens, Vitens, KWR Watercycle Research ...
Treatment of surface water with hydraulically cleaned reverse osmosis modules
This thesis is part of AiRO-project which is performed in co-operation with Vitens, KWR Watercycle Research Institute, Hatenboer-Water and Evides. The commissioning organization of this thesis was Vitens. The objective of the AiRo -project is to study a method to clean vertically positioned spiral-wound reverse osmosis membranes hydraulically with a mixture of air and water. The objective of this thesis was to study if it is possible to treat surface water with hydraulically cleaned membranes and how much pretreatment is required for stable operation. The first part of the thesis is theoretical framework about membrane techniques based on a literature survey. The second part of the thesis is research carried out with a reverse osmosis pilot installation. To study the performance of a hydraulically cleaned reverse osmosis module six short-term experiments were performed with different cleaning frequencies and different pretreatment filter pore sizes. It was found out that treatment of surface water is possible with hydraulically cleaned reverse osmosis modules and hydraulic cleaning is an effective way to clean reverse osmosis modules. After air-water cleaning a reduction was observed in transmembrane pressure and an increase in permeability. Under a high particle load the feed channel pressure drop was reduced efficiently with hydraulic cleaning. According to this study extensive pretreatment is not needed but less pretreatment requires shorter hydraulic cleaning frequency. Also rinsing water quality was studied and it was found out that after 5 minutes of air-water cleaning the rinsing water quality did not compare to the feed water quality. Further research with long-term experiments is suggested to study the pretreatment requirements and performance of hydraulically cleaned reverse osmosis membrane treating surface water, and air-water cleaning time when surface water is used as rinsing water. ; Tämä opinnäytetyö on osa AiRO-projektia, jonka yhteistyötahot ovat Vitens, Vitens, KWR Watercycle Research ...
Treatment of surface water with hydraulically cleaned reverse osmosis modules
Hyppönen, Heidi (Autor:in) / Hämeen ammattikorkeakoulu
01.01.2009
10024/1795
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
690
A Survey of Problems With Reverse Osmosis Water Treatment
| Wiley | 1984
Wastewater treatment by reverse osmosis
| Tema Archiv | 1976
Reverse osmosis water purifying system
Elsevier | 1988