translate English to French: For example, Cominco Engineering Services Limited has developed a hydrometallurgical process which unlike other processes, produces no waste water or other effluents, and acids are either reused or neutralized.
Ainsi, Cominco Engineering Services Limited a conçu un procédé hydrométallurgique qui, contrairement aux autres, ne produit pas d'eaux de rejet ni d'effluents et permet de réutiliser ou d'éliminer les acides.