Extension of the German design rules for wastewater plants
The design rules for wastewater plants, tried and tested over the years in Germany, are geared to the boundary conditions prevailing here. Consequently, for applications abroad it is frequently necessary to adapt the various design approaches to the wastewater and climatic conditions obtaining in other regions.
It is this task that the Joint Project entitled “Technology transfer-oriented research and development in the wastewater sector - validation at industrial-scale plants (EXPOVAL)”, were sponsored by the BMBF (Federal Ministry of Education and Research), addresses. The project focused on the extension of the existing design approaches so as to cover relatively high and relatively low wastewater temperatures and elevated salt concentrations. In addition, specific issues relating to individual wastewater treatment processes were also been examined.
Worldwide investigations relating to municipal wastewater treatment processes
These investigations have focused on the municipal wastewater treatment processes that are most widely used in global terms: activated sludge processes including submerged diffuser systems, trickling filter systems, anaerobic processes and wastewater ponds. The investigations also concentrated on wastewater disinfection and sewage sludge management.
The design rules that have been developed were validated in respect of their application to industrial-scale plants. Additional investigations on small-scale and semi-scale experimental plants were also carried out for purposes of comparison and to settle specific issues. The investigations have been carried out at sewage plant sites in different countries and climatic zones.
17 partner organizations in seven networked Subgroups
Six German universities and 11 industrial partner organizations have been integrated into seven closely-networked Subgroups, each dealing with the aspects of the investigations had mentioned. The overall project launched in 2012 and ended in Oktober 2016. Addiltional activities for the dissemination of the results will run until October 2017.