Dissertation > Excellent graduate degree dissertation topics show

Simulation and Optimization of A~2/O Wastewater Treatment Process Based on Model ASM2D

Author: DuQiang
Tutor: WangChunLi
School: Xinjiang Agricultural University
Course: Environmental Science
Keywords: Activated Sludge Model (ASM2D) A~2/O Process Small Sewage Treatment Plant Process Optimization
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 116
Quote: 0
Read: Download Dissertation

Abstract


The construction of sewage treatment plant is an effective means to solve the problem of urban water pollution. Under the new effluent discharge standards, nitrogen and phosphorus removal have been compulsively included. A2/O process has been developed in the last two decades as a biological nutrient removal technology. For improving nitrogen and phosphorus removal efficiency in the reaction system and optimizing discharge water quality, the sewage treatment process should be finely manipulated on the basis of all operating conditions. In this paper, a simulation program based on Matlab7.0 platform was designed according to ASM2D Model developed by the International Water Association, and then was applied for chemostat simulation and optimization of principal processing parameters on the newly constructed sewage treatment station with A2/O process in Bole City Airport.The main contents include:(1) The common activated sludge processes and their systematic fundamental structures were described, and the progress of both international and domestic activated sludge models was reviewed.(2) The components, mechanism and reaction process of ASM2D model were discussed and a systematic model combined ASM2D with Takacs Secondary Settling Tank Model was developed.(3) The program framework for the systematic activated sludge model combined ASM2D with Takacs Secondary Settling Tank Model was set out, and the assumptions for the systematic model were proposed. Accordingly, the calculation methodology for inflow and backflow components was determined. Lastly, the mass balance equations for the anaerobic, anoxic and aerobic tanks in A2/O process based on the Law of Mass Conservation were listed in accordance with ASM2D Model.(4) The sewage treatment plant project in Bole City Airport and its start-up operation were generally reviewed. The measured airport sewage quality as inflow component was input into ASM2D Model for the sensitivity analysis of major chemometric and kinetic parameters and YA value was therefore corrected to 0.32 g (COD)/g(N). Finally, based on the model the mixed liquid return ration (MLRR), sludge age (0) and return ratio (SRR), and dissolved oxygen (DO) in the whole process were computed. The results showed that Bole Airport sewage treatment plant at its design would be optimally operated in terms of COD, N and P removal efficiency and energy consumption under the conditions of MLRR=200%, SRR=75%,0=9.7 d, and DO=2mg/L

Related Dissertations

  1. Construction and improvement of basic education reform process evaluation platform,G521
  2. Research on Predictive Control and Simulation of pH Value Based on the Confection Process of Sodium Nitrate,TP273
  3. Process Support Vector Machine and Its Application to Satellite Thermal Equilibrium Temperature Prediction,TP183
  4. Research on Index System and Evaluation of University Office Greening,G647
  5. Analysis of Nutritional Compositions and Quality of Shishen (Eremurus Chinensis Fedtsch.),S647
  6. The Application of Fuzzy Comprehensive Evaluation Based on Genetic Algorithm in Vocational Evaluation of Classroom Teaching,G712
  7. Research and Design of One Kind of Paper’s QCS That Based on Embedded System,TP368.1
  8. 1 - deoxynojirimycin synthetic route design and process optimization,TQ463.5
  9. Study on Mechanism of Seawater Pearl Dyeing and Optimization of Dyeing Technology,TS933.23
  10. Study on Application of Red Yeast Rice in Fermented Sausage,TS251.65
  11. The Research on Evaluation Method of Highway Ecosystem Healthy,X826
  12. Health Risk Assessment of a Brownfield Contaminated by Volatile Chlorinated Hydrocarbons and Study on Screening of Remediation Technique,X820.4
  13. Selection and Optimization of Control Technics in CODCr and Colority of the Refined Cotton Wastewater Treatment Process in a Refined Cotton Enterprise in Rudong, Jiangsu Province,X791
  14. Evaluation on Stability of Threshing and Redrying Lamina Structure of Tobacco,TS443
  15. Study on Enhance Efficiency and Mechanism of BAC Process for Nitrogen Removal by Preoxidation,X703
  16. A Comprehensive Evaluation of Heritage Trees,S788
  17. Comprehensive Evaluation of Safety Production and Optimization of Safety for Yangcheng Coal Mine,X936
  18. Research on the Make-up Pen Production Flow Improvement of Chromalyra(tianjin)co.,ltd.,F273
  19. Strain Screening of Hainanmycin Production and Fermentation Process Optimization,TQ927
  20. A Control Chart for Simultaneously Monitoring the Time Interval and Size of an Event,X924
  21. Poyang Lake Area’s Farming Process and Environmental Change (1840-2010),X171

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
© 2012 www.DissertationTopic.Net  Mobile