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NITRIFICATION OF SECONDARY MUNICIPAL WASTE EFFLUENTS BY ROTATING BIO-DISCS
Citation:
Borchardt, J., S. Kang, AND T. Chung. NITRIFICATION OF SECONDARY MUNICIPAL WASTE EFFLUENTS BY ROTATING BIO-DISCS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-78/061.
Description:
This study was conducted to determine the effectiveness of nitrifying secondary effluent with rotating biological surfaces (RBS). Two municipal effluents were evaluated; one was from a high rate trickling filter and the other was from two-stage, flow through lagoon. RBS pilot plants were installed at both of the treatment plants to provide a continuous flow of secondary treated effluent. Ammonia-nitrogen, nitrite and nitrate-nitrogen were monitored along with other chemical constituents to determine what effect a change in loading, staging, pH, alkalinity, temperature, speed of rotation, and shock loads had on the performance of the RBS. The RBS pilot plant at the high rate trickling filter plant provided satisfactory results which showed the effect on effluent ammonia-nitrogen reductions by operational changes at the RBS pilot plant. The RBS pilot plant at the lagoon system encountered operating difficulties which resulted in an early cancellation for this phase of the project.