SINGLE SLUDGE ACTIVATED SLUDGE BIOLOGICAL TREATMENT OF CARBON, NITROGEN, AND PHOSPHORUS IN COMBINED MUNICIPAL AND INDUSTRIAL WASTEWATERS FROM THE KOHTLA-JÄRVE REGION OF ESTONIA
F. J. CASTALDI
Environmental Health Project
United States Agency
for International Development
| The application of a single sludge activated sludge system
to the treatment of combined municipal and industrial wastewaters from the Kohtla-Järve region
of Estonia is evaluated as an option to meet the carbon, nitrogen, and phosphorus effluent
requirements for discharge to the Baltic Sea as stipulated by the "Helcom Recommendations."
Literature are reviewed and current facility ope- rations data are developed to assess the potential of achieving nitrification, denitrification, and biological excess phosphorus removal with a wastewater treatment plant that processes industrial wastewaters that contain phenolics and other inhibitory organic compounds which can suppress ammonia-nitrogen oxidation by activated sludge. The evaluation concludes that single sludge activated sludge systems for biological nutrient removal may not be appropriate for the treatment of complex industrial wastewaters, and selection of this biological treatment process without first conducting pilot-scale tests to verify the performance of the technology in this application is not recommended. |