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In this study, effect of DO on simultaneous nitrification and denitrification in catching bed biofilm reactor were investigated, using three sets of parallel reactors controlled with different DO concentration. The average removal rate of COD was reached at 87% over the range of 0∼3mg/L of DO. Comparely, NH4+-N removal rate increased significantly with the increase of DO concentration. The optimize...
To study the treatment of the slaughter wastewater treatment, application of ABR/contact oxidation process of a lab scale was carried out, taking pig excrement as the inoculation source. Research results showed that COD removal rate lied from 72.2 ∼ 94.8% of the entire process, and the anaerobic VFA levels were lower than 400mg/L0 when the water quality fluctuated, the outflow remained stable, which...
A simplified activated sludge model (SASM) was proposed, which based on the activated sludge model No.1 (ASM1). This model describes the carbon oxidation process, nitration process and denitration process. The amount of components and processes of the SASM is fewer than that of the ASM1, so the practicability of the SASM is enhanced. Using the SASM to simulate the DMBR by Biowin, the results showed...
The aim of this study is to obtain a good description of nitrogen removal in a full scale oxidation ditch of 1300 m3 for later optimization. Different Data are collected and exploitation chart of this WWTP are used to analyze the working conditions. An intensive measuring campaign was investigated to describe the dynamic behavior. Different concentrations of nitrogen component are measured in the...
The bio-hydrogen producing process has complex interactions; thus, constructing a detailed mechanistic model and proper control architecture is difficult. Artificial neural networks (ANNs) are capable of inferring the complex relationships between input and output process variables without a detailed characterization of the mechanisms governing the process. This work presented a novel ANN that accurately...
A multi-population biofilm model for completely autotrophic nitrogen removal was developed and implemented in the simulation software AQUASIM to investigate the stratification and total nitrogen removal characteristics in a membrane-aerated biofilm reactor, which realized the counter-diffusion of the oxygen and substrates. The model considered four microorganisms including AeAOB, AeNOB, AnAOB and...
At present, activated sludge model has great value and can be used to improve the study, design and optimum operation of wastewater treatment around the world. It has been applied widely in the world. In this paper, the application and calibration of Activated Sludge Model No.l in the practical wastewater treatment plant had been implemented. The characterization and parameter of the outfluent from...
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