Dissertation > Excellent graduate degree dissertation topics show

Preliminary Study on Enhanced Nitrification Performance and Influence Factors Using Electro-Biological Contractor

Author: LiuPeiFeng
Tutor: ZhuSongMing
School: Zhejiang University
Course: Mechanization of agriculture
Keywords: Bioelectrical technology Nitrification Nitrification kinetics Response surfaceanalysis
CLC: X703
Type: Master's thesis
Year: 2014
Downloads: 34
Quote: 0
Read: Download Dissertation

Abstract


In recalculating aquaculture system (RAS), the ammonia in the water is toxic to fish, biological filter is a common method for the removal of ammonia nitrogen. However, the traditional methods have the limits in saving energy, and increasing the reaction efficiency. Bio-electric reactors (BER), especially the study in simultaneous nitrification and denitrification (SND) provide some new ideas for the application of water treatment technologies which combine the electro-chemical technology and biological membrane technology, and it is especially valuable for the emergency treatment in the RAS.This paper mainly studied the nitrification and its dynamics kinetics under different voltage in the series rotating biological contactor reactor, and the compartmental kinetics characteristics of nitrification under various voltage was studied. The effect and the Current Intensity, the concentration of ammonia nitrogen (TAN) and hydraulic retention time (HRT) on the removal rate of ammonia nitrogen (TAN removal efficiency) also were studied by the method of central composite design(CCD) and response surface analysis. The results are as follows:(1) There is a linear relation between nitrification rate and the influent ammonia load. When the applied voltage is different, the linear equation is different. When the influent ammonia load is low, the effect of voltage was not significant on the nitration reaction rate, when the influent ammonia load increases, the difference effect of voltage on nitrification rate is larger.(2) The kinetic model of nitrification is not the same under different voltages. When the applied voltage was OV (traditional biological filter),1V,3V and5V, the kinetic model of nitrification were R=2.62(S-0.38)/(S+9.10),R=3.17(S-0.18)/(S+8.84), R=3.28(S-0.13)/(S+4.62), R=2.70(S-0.23)/(S+3.48).(3) The nitration piecewise dynamic model keeps a grade order nitrification under different applied voltage in the condition of low concentration of ammonia nitrogen, but gradually into the half grade or zero order kinetics reaction kinetics reaction with the increase of concentration of ammonia nitrogen. And one of the conditions of3v it into half level dynamics and zero order kinetics reaction of ammonia nitrogen are less than the other conditions, to prove its higher removal efficiency of ammonia nitrogen under the same concentration of ammonia nitrogen.(4) The results showed that the nitrification could be easier to become half-order and zero-order kinetic rate under the condition of3v than others because it had smaller range of first-order nitrification, which means higher nitrification rate. This could be useful when there is an emergency in RAS.(5) Response surface analysis test for the ammonia nitrogen concentration and hydraulic retention time on ammonia nitrogen removal efficiency were different significantly, and the best current intensity was1.1±0.1A/m2.(6) Coulomb Efficiency is different under the different conditions. Besides, the highest columbic efficiency showed up under the condition of1A/m2for current density,12.38h for HRT,8.29mg/L for TAN.This study shows that the ability of the nitration reaction would enhance the nitrification, but the intensity of electric current have to be controlled within a certain range of security.

Related Dissertations

  1. Characteristic Impedance of Microbial Fuel Cells (MFCs) and Nitrafication in a Biocathode of the MFCs,TM911.4
  2. The Feasibility Study of Qixian Municipal Sewage Treatment Engineering,X703
  3. Start-up and Operation of Partial Nitrification Denitrification,X703
  4. Design and Optimization of Biofilter in Recirculating Aquaculture Systems,X703
  5. Optimization of Water Purification Process in Aerobic/anaerobic Subsurface Flow Constructed Wetlands,X703
  6. Research on Removal of Nitrogen in Urban River by Biological Nitrification and Denitrification,X703
  7. Evaluation of up-flow Two-stage Biological Aerated Filters,X703
  8. Study on the Embedding Method of Heterotr-ophic Nitrification-aerobic Denitrification S-trains in Wastewater Treatment,X703
  9. Analysis and Study on Treatment Technolgy of Coking Wastewater from General Coke Making Plant of Ansteel,X703
  10. Research on Reaction Performance of Pyridine and Thiazole Derivatives,O626
  11. The Study of SBR Shortcut Nitrification Method of Coking Wastewater Treatment,X703
  12. Research on the Condition and Influnce Factors of Shortcut Nitrification-denitrification in A~2/O~2 Process,X703
  13. Treating Coking Plant Wastewater with Simultaneous Nitrification and Denitrification Technique,X784
  14. Linaria synthesis and activity of acid derivatives,R914
  15. Simulation Analysis of Nitration Reactor of Toluene to Mononitrotoluene,TQ241.12
  16. The Technology Research on Simultaneous Nitrification and Denitrification with Phosphorus Removal in SBR,X703
  17. Study on Process Control and Kinetic of Simultaneous Nitrification and Denitrification Via Nitrite,X703
  18. Nitrogen Removal from Sludge Dewatering Water by Nitritation and Sludge Fermentation Denitritation,X703.1
  19. The Foundation Study of Low Energy Cost under Limited Filamentous Bulking,X703
  20. Application Study on Nitrogen Removal by Inoculation in Enhanced Hybrid Biofilm Activated Sludge Process,X703.1
  21. Research on Denitrification and Recovery of Phosphorus in Residual Sludge by Hybrid Membrane Bioreactor,X703

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