TuasOne waste-to-energy plant will replace the now decommissioned Tuas Incineration Plant on Tuas Avenue.
The 2021 fire follows another at a separate Tuas plant that injured three workers.
Veolia Environmental Services Singapore pleaded guilty in a district court to contravening the Workplace Safety and Health Act by failing to thoroughly test a waste liquid before mixing it with a chemical liquid.
It caused an explosion at its Tuas incineration plant on Nov 8, 2013, and the resulting fire spread to an area the size of about two football fields.