BIODIVERSITY OF MICROBES IN PAPER MILL EFFLUENTG. SENTHILKUMAR AND A. PANNEERSELVAMAbstract An investigation was carried out to assess the impact of paper mill effluent on the microbial diversity viz., bacteria and fungi. Results of one year ecological study revealed that altogether 7 species of bacteria and 12 species of fungi were isolated from the paper mill effluent stream. Among bacteria, Streptococcus with two species and others with single species each were recorded. Aspergillus was dominant among fungi with 9 species followed by Penicillium, Rhizopus and Trichoderma. Higher amounts of phosphates and nitrates, with sufficient amount of oxidizable organic matter limited dissolved oxygen content and slightly alkaline pH were probably the factors favouring the growth of microbes especially fungi. The utilization of dominant species of fungi to monitor pollution in paper mill effluent has also been discussed.
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