Title: Modernisation Problems of the Sewerage Infrastructure in a Large Polish City
Abstract: Modernisation of combined sewerage systems in contemporary cities turns out to be a very difficult task. The lack of space and possible obstructions of construction works require selection of non-typical upgrading solutions or adaptation of the standard ones. The City of Lodz, one of the largest cities in Poland, started with a modernisation plan for its old combined sewerage system with 21 CSOs connected to a new large WWTP. In order to fulfil new state regulations, several technical proposals have been developed: (a) disconnecting some urban areas from the combined system, (b) adding a certain number of underground detention tanks at the existing CSOs structures, (c) rising the CSO weirs, (d) implementing distributed detention in the form of Stormcell devices for controlling roof runoff, and (e) creating detention in urban river courses. In the near future, addition of satellite treatment facilities at CSO outlet sewers must be also considered. Despite of their long-term operation, trunk sewers appear to be structurally sound and not damaged or corroded; nevertheless, there is a need to perform rehabilitation works on some network segments. The proposed solutions will significantly reduce the risk of urban flooding and this is an additional advantage of the future modernisation works. Successful demonstrations of detention facilities and real-time control for the sewerage network and the treatment plant in the city seem to be beneficial.
Publication Year: 2006
Publication Date: 2006-07-06
Language: en
Type: book-chapter
Indexed In: ['crossref']
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