Modelling of nitrogen removal in Ankara wastewater treatment plant

Kim, Eun-Ah
Nowadays environmental legislations in many countries have all imposed strict effluent quality standards for carbon, nitrogen and phosphorous for wastewater treatment plants. This in turn caused complicated design, operation and control of biological treatment systems. As a result, computer programs based on complex mathematical models are now developed for the simulation of such complicated systems. The influent wastewater characterization based on COD and Nitrogen fractionation became very important in design and operation of biological nutrient systems. Several methods for the determination of COD, N fractions and biokinetic parameters have already been proposed in the literature. However, none of these methods have yet been standardized. The COD and N fractions of domestic wastewaters alter appreciably from country to country and with the climate. In this 111work, a case study for Ankara is being presented. During the study, wastewater samples were taken periodically from Ankara Central Wastewater Treatment Plant (ACWTP), and were analysed and fractionated by the physical-chemical method. The biokmetic parameters required for the simulation studies were also determined in a lab-scale reactor, which was composed of one aerobic and one anoxic tank for nitrification and denitrification, respectively. Effluent TKN, NO3-N, NH3-N from each the reactor were analysed and the nitrification - denitrification system was calibrated for Activated Sludge Model Number 1 (ASM1) by using the SSSP software. The calibrated model simulations predicted performance of the lab-scale model with reasonable accuracy. As the next step the calibrated SSSP program was used for the verification of the retrofit design undertaken for the ACWTP, for additional N- removaL


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Citation Formats
E.-A. Kim, “Modelling of nitrogen removal in Ankara wastewater treatment plant,” Middle East Technical University, 2002.