Sulphuric acid plant for Suzano’s new pulp mill in Brazil

Brazilian pulp producer Suzano has ordered a concentrated sulphuric acid plant from Andritz for its new Ribas do Rio Pardo mill in Brazil (see PPL NovDec 2022).

With start-up scheduled for the second half of 2024, the SulfoLoop plant will have the capacity to produce 153 tons of commercial grade (more than 97 per cent) sulphuric acid per day from the pulp mill’s concentrated odorous gases and elemental sulphur, making the mill completely self-sufficient in sulphuric acid and recycling sulphur from waste streams. The plant will help to control the sodium and sulphur (Na/S) balance and the sulphidity of the pulp mill. Also, the resource-efficiency of the mill will be improved because less sulphate needs to be discharged.