Dissertation > Excellent graduate degree dissertation topics show

The Study on Denitrifying Phosphorus Removal from Municipal Wastewater in Guangzhou Region

Author: ZhangHong
Tutor: ZhangChaoSheng
School: Guangzhou University
Course: Municipal Engineering
Keywords: denitrifying phosphorus removal municipal wastewater nitrate nitrite
CLC: X703
Type: Master's thesis
Year: 2007
Downloads: 245
Quote: 0
Read: Download Dissertation


Today, the nitrogen and phosphorus removal technology aimed for eutrophication control has been the study focus in the wastewater treatment area. The main advantage of denitrifying phosphorus removal is the possible saving of COD and energy and less sludge production.So denitrifying phosphorus removal can solve the problems in traditional processes and it becomes the study focus in biological phosphorus removal area.In order to study the application of denitrifying phosphorus removal technology for the low carbon source municipal wastewater treatment ,the experiment operated with municipal wastewater simulatively in Guangzhou region was carried out by SBR. The application for treating wastewater in Guangzhou region with denitrifying phosphorus removal technology was studied systematically.The optimal running times and several factors were studied particularly, the application of on-line monitors was studied either. The test of denitrifying phosphorus removal with nitrite as electron acceptor from Guangzhou municipal wastewater was carried out.The efficiency of denitrifying phosphorus removal by sludge can be enhanced by gradually increasing the operation time of anoxic process under the anaerobic/anoxic/aerobic operation mode.The DPB is 85.2% in all PAOS.For dealing with municipal wastewater in Guangzhou region,30 mins for anaerobic process,3.0 h anoxic process and 1.0 h aerobic process are the best running times, with TP of less than 1.0mg/L in the effluent under this mode. With on-line monitoring ORP and pH,ORP can not indicate denitrifying phosphorus uptake and pH can indicate the end of phosphorus uptake under anoxic condition.ORP and pH both can be used as the control parameters under aerobic condition following. The control of DO with 1.0mg/L under aerobic condition will stabilize the operation of denitrifying phosphorus removal.The effects of nitrate load and nitrate addition mode on denitrifying phosphorus removal were studied. The results show that the better phosphorus removal can be obtained with higher nitrate load. The continuous addition of nitrate in this paper had the highest rate of denitrifying phosphorus uptake in several addition modes. Meanwhile,the effects of the carbon source concentration ,pH and nitrite load were studied either, they could increase the efficiency of phosphorus removal controlled reasonable threshold areas. The denitrifying phosphorus removal can keep steady under COD=180 mg/L in the influent, with TP of less than 1.0mg/L in the effluent.Denitrifying phosphorus removal with nitrite as electron acceptor from Guangzhou municipal wastewater by phosphate-accumulating sludge was studied. It has noticeable effect on dephosphatation, the phosphorus removal efficiency is 87.4% in anoxic phase,with TP of less than 1.0mg/L in the effluent, but the efficiency of denitrifying phosphorus removal with nitrite is lower than that with nitrate.

Related Dissertations

  1. Cultivation and Effects of Environmental Factors on Carrying WSSV Virus of Litopenaeus Vannamei,S945
  2. Study on the Synthesis and Adsorption Behaviour of Chitosan Derivative,TS254.9
  3. The Rice OsNAR2.1 Participates the Regulating Root Growth by Nitatre,S511
  4. Effects of Temperature, Salinity, Dissolved Oxygen, Ammonia-N and Nitrite-Non the Molting of Scylla Paramamosain,S917.4
  5. Effect of Nitrogenapplication Patterns on Variation of Soil Nitrate-N and Grain Yield of Wheat and Maize,S512.11
  6. Functional Analysis of Two Rice Nitrate Transporter Genes OsNRT1.1a and OsNRT1.1b,S511
  7. Screening of Nitric Oxide Producing Lactic Acid Bacteria from Sour Meat and Influences on Fermented Sausage for Color Retention,TS251.65
  8. Set Up Ion Chromatography Method for Simultaneous Determination of Nitrate Nitrite and Thiocyanide in Dairy Food,O657.75
  9. New Japanese-style kimchi flavor development,TS255.54
  10. Complex three-dimensional electrode - Removal of biofilm reactor Experimental Study of nitrate in drinking water,X703
  11. Treatment of Nitrate-contaminated Water Using Sulfur-based Autotrophic Denitrification Combined with Bac (Biological Activated Carbon) System,X703
  12. Study on Nitrogen Removal Performance in Pre-denitrification UBAF Treating Urban Sewage,X703
  13. Research on the Process Optimization of the Jinan Second Wastewater Treatment Plant by Using Activated Sludge Mathematical Model,X703
  14. Advanced Treatment on Tail Water from Municipal Wastewater Treatment Plant by Modified Diatomite,X703
  15. Denitrifying Phosphorus Removal in Two-sludge Baffled Reactor,X703
  16. Investigations of Nitrite Residues of Cooked Meat Products in Huaibei City Anhui Province,R155.3
  17. Research on Changes of Nitrite and Generation of N-nitrosamine in Cured Minced Meat under Heat Treated and in Simulated Gastric Juice,TS251.1
  18. The Rapid Detection of Technology of the Nitrite and Sulfite in Pickled Potherb Mustard,TS255.7
  19. Fabrization and Application of Polymer/noble Metal-nanoparticle Nanocomposites,TB383.1
  20. The Studies on Selective Aerobic Sulfides Oxidation with Molecular Oxygen,TQ247
  21. Cysteamine Monolayer Inducing the Formation of Noble Metal Nanoclusters for Electrochemical Sensor Application,O646

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