Forslov Scania headquartered Swedish Construction Company Peab has been commissioned to continue to prepare for the blasting work necessary to make room for a 140 meter long basin hall where waste water is treated through a biological process in Trollhättan. The customer is Trollhättan Energi and the contract is worth SEK 125 million. Blasting will be underground but people living close by may be able to feel vibrations from the blasts and therefore vibration measuring instruments will be put in place. The first blast salvo will take place inside the mountain in the beginning of the summer and the blasting is expected to be completed by June 2023. The project is a turnkey contract in strategic partnering. The new part of the waste water treatment plant should be up and running in 2025.Trollhättan Energi runs the project Trollhättan's future waste water treatment. Waste water will be treated in three steps and go through mechanical, chemical and biological treatment in a large cavern before it runs out into Göta River again. Starting in the Summer of 2022 Peab will blast away an area of 2,300 square meters, corresponding to 29,000 square meters rock, in Arvidstorp outside of Trollhättan to enable the third nitrogen treatment step in the underground part of the waste water treatment plant.