Studies of sewage purification; the utilization of organic substrates by activated sludge.

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@article{PLACAK1947StudiesOS, title={Studies of sewage purification; the utilization of organic substrates by activated sludge.}, author={O R PLACAK and C C Ruchhoft}, journal={Sewage works journal}, year={1947}, volume={19 3}, pages={423-40} }