Zweckverband ARA Egg – Oetwil am See
WWTP Esslingen in den canton of Zurich
After having been technically upgraded for 1.4 million Swiss francs as recently as 2020, the WWTP Esslingen has now become even more modern. Electricity costs, which amount to about 60,000 Swiss francs annually, are greatly reduced with the solar folding roof. In order to obtain cheap electricity, it used to be necessary to run individual processes at night. That is no longer necessary. What also convinced those responsible in advance were the lower construction costs compared to a fixed roof.
With a module area of 1,000 m2 , the new solar power plant supplies 128,000 kWh per year. After a short construction period of just under three months, the solar folding roof was put into operation on 7 December 2021.