Simulation and performance evaluation of domestic wastewater treatment in batch bioreactor with ASM1 model

Authors : Salih Kurçin, Ahmet Uygur

Pages : 43-53

View : 84 | Download : 201

Publication Date : 2025-12-25

Article Type : Research Paper

Abstract :In this paper, the time-dependent changes in organic matter (COD), nitrogen components (TN, TKN, NH₄⁺-N), total suspended solids (TSS) and utilisation rate parameters (OUR, COUR, NOUR, etc.) for the treatment of simulated domestic wastewater in a batch bioreactor are investigated. The treatment process consists of aerobic phase only and simulation studies were carried out based on Activated Sludge Model No.1 (ASM1) and Polymath Plus simulation software was used for modelling. During the simulation period, the hydraulic residence time in the reactor was kept constant and the COD/N/P ratio (100/6.99/1.46) and VSS/TSS ratio (0.80) were maintained. The initial COD concentration was set as 597 mg/L and the effects of different simulation times on the treatment performance were evaluated. The results showed that the removal percentages of COD, TN, TKN, NH₄⁺-N and TSS increased and effluent quality improved with increasing simulation time. The highest removal efficiencies were obtained at a simulation time of approximately 12.9 hours and calculated as COD 71.55%, TN 14.72%, TKN 70.75%, NH₄⁺-N 99.95% and TSS 33.72%. These results show that batch bioreactors offer an effective operation strategy for domestic wastewater treatment and simulations with the ASM1 model are a successful tool for evaluating system performance.
Keywords : Matematiksel modelleme, Organik madde giderimi, Biyoreaktör, Polymath Plus, Nitrifikasyon

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