The second public lecture of the Conservation School on salt and groundwater problems in historic settings within the framework of Athar Lina's Groundwater Reseach Project. An overview of the techniques implemented or studied in water treatment by TU Berlin El gouna Campus' water management department, with explanation of its advantages, limitations and capacities and designated uses. In addition to the approach to challenges of pumping and storage. *About the lecturer: Carsten Riechelmann | Research and teaching associate - Bioengineering Diploma, Technical University of Braunschweig Within his studies of Bioengineering in north Germany, he went to France to study Biotechnology / Genetics and to Czech Republic to take courses in European environmental politics / Waste geochemistry / European history. In Morocco's industrial capital Casablanca he finished his Diploma about wastewater reuse for urban agriculture under the umbrella of the BMBF Future Megacities Project. Using a membrane bioreactor he examined the reusability of treated industrial wastewater for local agricultural demands. Since April 2012 he works for the Campus El Gouna and coaches the students in the subjects Water Supply and Sanitation I & II as well as Water Reuse Technology and an integrated project were their skills to develop water and wastewater infrastructure are practiced. In the scope of his research he works since 2013 together with the city service El Gouna to increase the treatment capacity of the central wastewater treatment plant. As it is not possible to build additional facilities he adapts and compares to different biofilm carrier systems aiming to double the plant’s irrigation water production to 2000 m³/d per block. In cooperation with the Energy Engineering Department he developed a combination of a trickling filter system for greywater treatment that uses the evaporation cooling effect for air conditioning systems while producing pressurized process/irrigation water on household level. *Athar Lina Groundwater Research Project organised by Athar Lina Initiative (Megawra-Built Environment Collective) in partnership with the Ministry of Antiquities and in collaboration with Cairo Governorate, the University of Oregon, the University of Cornell and Takween. Funded by the American Research Centre in Egypt with additional funding from the US Embassy, Cairo. *The lecture will be in English *Location: Megawra al-Khalifa (Khalifa community center) A Google map showing the directions to Megawra al-Khalifa: http://goo.gl/lvAu0C