Nitrification in Single-Stage Trickling Filters

by Rao Y. Surampalli, U.S. Env. Protection Agency, Kansas City, United States,
O. Karl Scheible, U.S. Env. Protection Agency, Kansas City, United States,
Shankha K. Banerji, U.S. Env. Protection Agency, Kansas City, United States,

Document Type: Proceeding Paper

Part of: Critical Issues in Water and Wastewater Treatment


An assessment of nitrification of municipal wastewater in trickling filters was performed using operating data from wastewater treatment facilities currently in operation. A survey of trickling filter use in the United States, found twenty-seven plants accomplishing some degree of nitrification. Of the twenty-seven plants ten were identified as having operating data sufficient for further analysis. Although most of the plants evaluated were not designed as single-stage systems they all provided sufficient data to evaluate trickling filter performance as a single-stage system. The evaluated plants were generally meeting their permit requirements, including ammonia-nitrogen limits when applied. Analysis of the data compared favorably with the BOD loading rates suggested by the EPA Process Design Manual for Nitrogen Control.

Subject Headings: Filters | Municipal wastewater | Wastewater treatment | Water treatment | Data analysis | Ammonia | Nitrogen | Nutrient pollution | United States

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