In addition to reducing the contaminant load to the existing combined mill effluent treatment system, reducing the clean water requirements and potentially reducing the impact of discharging the treated condensate to the environment, reusing the condensate could also result in significant energy savings if the heat content of the evaporator condensate can be recovered (Sebbas 1987; Durham 1991). [...] 6 SUMMARY OF RESULTS Effects Of High Temperature Operation On The Activity Of The Microorganisms In The Biological Treatment System (Bérubé and Hall 2000a) The effect of elevated operating temperature was investigated by progressively increasing the operating temperature of the MBR from 55 to 70 oC (expected range of temperatures for evaporator condensate stream). [...] The effect of the trace organic contaminants present in the evaporator condensate matrix on the biological activity in the MBR was investigated by progressively replacing the feed to the MBR from 0% real evaporator condensate (100% synthetic evaporator condensate) to 100% real evaporator condensate. [...] A relationship describing the overall removal of methanol in the MBR, presented in Equation 2, was proposed and used to investigate the effects of the two groups of methanol- utilizing microorganisms in the MBR on the overall specific methanol utilization coefficient. [...] 17 • Regardless of the variations in the characteristics of the evaporator condensate to be treated, the quality of the treated effluent was constant.
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