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Coliform bacteria have long been used to indicate fecal contamination of water and thus a health hazard. In this study, the in-mill water and external effluent treatment systems of seven typical Canadian pulp and paper mills were all shown to support the growth of numerous coliforms, especially Klebsiella spp., Escherichia coli, Enterobacter spp., and Citrobacter spp. In all mills and most sampled...
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