Divorce and social class during the early stages of the divorce revolution: evidence from Flanders and the Netherlands

In times of low divorce rates (such as the nineteenth century and early twentieth century), the authors expect higher social strata to have the highest divorce chances as they are better equipped to break existing barriers to divorce. In this article, the authors analyze data from marriage certificates to assess whether there was a positive effect of occupational class on divorce in Belgium (Flanders) and the Netherlands. Their results for the Netherlands show a positive association between social class and divorce, particularly among the higher cultural groups. In Flanders, the authors do not find this, but they observe a negative association between illiteracy and divorce, an observation pointing in the same direction.

Technical and economical evaluation of water recycling in the carwash industry with membrane processes

In the carwash industry, water recycling is necessary to be in accordance with present and upcoming environmental laws. As this is not possible with traditional techniques, membrane processes (like ultrafiltration (UF) and nanofiltration (NF)) are technically and economically evaluated in this study. Concerning the technical part, there needs to be a compromise between a high permeate permeability on the one hand and a high permeate purity on the other hand. Depending on the use of the purified wastewater, ultrafiltration (to recycle wastewater in the main wash cycle) or nanofiltration (to recycle wastewater in the rinsing step) would be the optimal choice. Concerning the financial part, the implementation of membrane processes in the wastewater purification installation is economically feasible, especially when expensive tap water is used as pure water. These positive evaluations imply that membrane processes can be useful to recycle wastewater in the carwash industry, on condition that the right membrane type (with the least membrane fouling) and the right process format (e.g., hybrid process of UF and/or NF with a biological treatment) is selected.