A renovation of the existing emissions control unit at the Hinwil Waste Recycling Plant (KEZO) in Switzerland is planned for sometime in the next two years, and to carry it out an innovative technology characterised by low energy consumption will be used for the very first time. Hitachi Zosen Inova is the technology firm that will drive the project with its ‘Xerosorp’» process.

The Hitachi Zosen Inova development is said to markedly reduces toxic emissions while offering considerable energy cost reductions: the cleaning unit operates without subjecting the catalyser to the usual power-intensive reheating process. Further, a new heat exchanger will see considerably more energy recovered from emissions. Therefore the innovative process contributes in two ways to sustainable use of our daily waste.

The new technology should also lead to a considerable reduction of operational costs at the waste recycling plant. Daniel Böni, head of KEZO, says those savings counted among the reasons why the Zurich-based firm was chosen for the contract. “Ultimately, though, what convinced us most favourably was the short switch phase from the old to the new unit. The variant chosen will enable us to make the change with a very short standstill.“

In the new unit, two bicarbonate drying processes will replace the three existing wet cleaning systems. Georg Silbermann, CEO of Hitachi Zosen Inova, says that the most notable challenges to planning were the limitations to the available space, and the need to remain fully operational.