In 2003 Austrian Energy & Environment Group (AE&E) bought Von Roll Inova on behalf of A-TEC Industries.
[2] Shares in Costain Group dropped when AE&E delayed £22 million in payments due for building the Riverside Resource Recovery ERF in London in November 2010.
[4][5][6][7][8] In 2014 HZI acquired Axpo Kompogas, allowing it to sell anaerobic waste digestion technology in the UK.
The company built an EfW plant in San Luis Obispo, California, in 2018, and has pioneered the production of synthetic carbon-neutral methane by electrolysis of water to form hydrogen then reacting it with carbon dioxide, a process it calls EtoGas.
[11] The Millerhill Recycling and Energy Recovery Centre outside Edinburgh opened in 2019, using combustion and XeroSorp flue gas treatment from HZI.