Dissertation > Excellent graduate degree dissertation topics show

Simulation Study on Transportation of NH3-N with Constructed Rapid Infiltration

Author: WangFei
Tutor: GuoJinSong
School: Chongqing University
Course: Municipal Engineering
Keywords: Rapid Infiltration System Ammonia Nitrate Migration Convection - dispersion model Simulation
CLC: X703
Type: Master's thesis
Year: 2008
Downloads: 120
Quote: 7
Read: Download Dissertation

Abstract


Rapid Infiltration System (Constructed Rapid Infiltration, referred to as CRI) as a method of land treatment, sewage rapid infiltration system (Rapid Infiltration system, referred to as RI) on the basis of development, through the use of better permeability percolation medium instead of natural soil of sewage treatment, compared with other ecological treatment process, with a high hydraulic loading, small footprint and so on. Pre-discussion group on the CRI system for domestic wastewater treatment performance test: CRI system of sewage nitrogen removal rate is not high constraints decontamination performance of the whole system. Soil and climatic conditions in the Three Gorges area, the paper test observations ammonia and nitrate transport processes in the CRI system, and the use of the ammonia transport model based on soil solute transport model created to simulate the CRI system migration process. Test and simulation of ammonia and nitrate in the the CRI system migration process, the following conclusions: By studying the ammonia in the the CRI system of migration process: the removal of ammonia in the water distribution stage adsorption state trapped in the soil, and the 0-40cm soil absorption of ammonia nitrogen to remove the greatest contribution. Ammonia adsorbed in the CRI system after the fall of the dry process is oxidized to nitrate and nitrate vulnerable in the beginning of the next cycle of water distribution out with the water from the soil. Through research and nitrate in the the CRI system of migration process: the CRI system of denitrification occurs mainly in water distribution after 9-24h, and denitrification occurs mainly in the 25-70cm soil. Based of ammonia transport model of the the CRI system established by the soil solute transport model simulation of ammonia in the CRI system migration process, the results show that: the simulated and measured values ??consistent trend, but systematic error in the data accuracy must be added to the error compensation value of the simulation results to be amended. This study established the error compensation function: C =-0.46t 17.35; analog values ??to achieve a very high fitting accuracy, as amended. Block coefficient, the average pore velocity, longitudinal dispersion coefficient three main parameters of sensitivity analysis can be drawn: block coefficient and dispersion coefficient can be conducive to the CRI system ammonia nitrogen removal efficiency, and increase the average pore The flow rate will not be conducive to the the CRI system for the removal of ammonia nitrogen. As can be seen from the sensitivity analysis, the parameters for the degree of influence of the CRI system ammonia removal, the average pore velocity gt; block coefficient gt; longitudinal dispersion coefficient.

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Research on Mechanism Analysis and Modeling Simulation of Horizontal Well Tractor,P631.83
  3. Study on Springback of High-Strength Steel Stamping,TG386
  4. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  5. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  6. The Brake Performance of Hydraulic Retarder and Simualtion Research on Its Application for Aircraft Arrestment,TH137.331
  7. Satellite Attitude Determination Based on Gyro and Star Sensor,V448.2
  8. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  9. Research on Orbital Control Method for Space Rendezvous and Docking,V526
  10. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  11. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  12. Single Neuron PID Control for Electro-Hydraulic Servo Unit of Ship Rudder,U666.152
  13. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  14. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  15. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  16. Numerical Simulation of Biomass Direct Reburning,TK16
  17. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  18. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  19. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  20. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  21. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21

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