Biogenie H2so4 corrosion of concrete in pure oxygen activated sludge bioreactors

Significant concrete corrosion has occurred within the headspace of a pure oxygen activated sludge treatment (OAS) bioreactor treating pulp mill effluent. The severity of damage required extensive and expensive repair, which comprised rehabilitation of the concrete and installation of a protective coating. It also caused a loss of production. A review of the relevant literature was conducted to validate the suspected mechanism of biogenic H2SO4 …