||Upgrading Existing Wastewater Treatment Plants. Case Histories of Biological Process Modifications.
||Hazen and Sawyer, New York.;Environmental Protection Agency, Cincinnati, Ohio. Office of Technology Transfer.
Sewage treatment ;
Activated sludge process ;
Trickling filters ;
Microorganism control(Sewage treatment) ;
North Carolina ;
New York ;
Sewage treatment plants
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The case histories described in this report relate to upgrading the performance of activated sludge and trickling filter plants through modification to the biological processes. In these processes the biochemical reaction rates depend on the concentration of reactants (wastes) and of the appropriate microorganisms capable of feeding on the wastes.