Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Solar powered ultrafiltration
In many rural areas public power and drinking water supply does not exist. Often, the surface water is infected with injurious bacteria. With ultrafiltration membranes, a rejection of these bacteria is possible. For an economic operation of an ultrafiltration process for the drinking water production in rural areas the required power should be produced by solar cells. However adapting the ultrafiltration to changing power input in order to reduce expensive battery capacity is a major problem. Two pilot devices were installed and first results show that it is possible to run an ultrafiltration plant in a discontinuous cross flow mode over a long period with a stable flux. A process model is developed to study different operating conditions. The quantitative results depend on the control of the fouling. The specific energy consumption was about 3,5 Wh/l, which is even a high value for cross flow. This is caused by the low pumping efficiency at about 20 - 30 %. This pumping efficiency is common for solar pumping systems in this small size, because they were nominally optimised for a high range of power inputs. If the membrane is intact, the produced water is free from bacteria and viruses.
Solar powered ultrafiltration
In many rural areas public power and drinking water supply does not exist. Often, the surface water is infected with injurious bacteria. With ultrafiltration membranes, a rejection of these bacteria is possible. For an economic operation of an ultrafiltration process for the drinking water production in rural areas the required power should be produced by solar cells. However adapting the ultrafiltration to changing power input in order to reduce expensive battery capacity is a major problem. Two pilot devices were installed and first results show that it is possible to run an ultrafiltration plant in a discontinuous cross flow mode over a long period with a stable flux. A process model is developed to study different operating conditions. The quantitative results depend on the control of the fouling. The specific energy consumption was about 3,5 Wh/l, which is even a high value for cross flow. This is caused by the low pumping efficiency at about 20 - 30 %. This pumping efficiency is common for solar pumping systems in this small size, because they were nominally optimised for a high range of power inputs. If the membrane is intact, the produced water is free from bacteria and viruses.
Solar powered ultrafiltration
Durch Sonnenenergie betriebene Ultrafiltration
Martin, T. (Autor:in) / Hapke, J. (Autor:in) / Günther, R. (Autor:in)
2002
9 Seiten, 10 Bilder, 7 Quellen
Aufsatz (Konferenz)
Englisch
| British Library Online Contents | 2017
| Tema Archiv | 1977