الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
A simple COD fractionation method was selected from literature to characterize the wastewater specifically aimed at biological organic removal design. Simple methods were also proposed to determine Y, k.i, Ilmax, and Ks. These kinetic parameters and the detailed fractionation results of raw wastewater COD can be used in biological nutrient removal process design computer programs to obtain optimum design information for wastewater treatment plants. The models are useful in determining the process volume and evaluating the effect of COD loading, biomass concentration, and sludge age. The methods provided for parameter determination will allow smaller wastewater treatment plants or industries to evaluate the feasibility of biological organic removal of their wastewater with minimum cost.
The final results show the averages of the BOD, total COD, COD fractions and
the kinetic parameters for the EWWTP form Nov. 28, 2004 to Jan 2, 2005.
A preliminary design was proposed to upgrade the EWWTP for biological treatment using the activated sludge process. Primary clarification, aeration tanks and final clarification were designed for an average flow rate of 410,000 m3/ day and average influent COD concentration = 457 mg/L.
The real EWWTP and proposed upgrade were simulated using GPS-X to predict
effluent flow characteristics after every operational scenario using the data obtained from experimental work. Many scenarios were generated using the GPS-X program with different initial variables and conditions; in each scenario many variables were studied like flow rate, COD, BOD, suspended solids (SS) concentrations, TKN, SNH and SNO. The simulation analysis applied to the suggested EWWTP was conducted using models ASM No.1 and ASM No.3 for the activated sludge system and Simple Id model for both primary and final clarifiers.
Two studies were generated to study the effect of aeration tank volume on the
final effluent properties and to study the effect of influent flow rate on final effluent
properties.