Dissertation > Excellent graduate degree dissertation topics show

Nitrogen and Phosphate Assimilation Capacity of a Photosynthetic Strain

Author: LiuMin
Tutor: LiangYunXiang
School: Huazhong Agricultural University
Course: Microbiology
Keywords: Photosynthetic bacteria Eutrophication Nitrogen and phosphorus assimilation Water purification
CLC: X172
Type: Master's thesis
Year: 2011
Downloads: 59
Quote: 0
Read: Download Dissertation

Abstract


Eutrophication of water environment is recognized worldwide as the \In this paper, a R. palustris is the main object of study, the basic law of the assimilation of nitrogen and phosphorus in different concentrations of medium, different xenobiotics and natural water body conditions, photosynthetic bacteria medium reasonable optimization. The specific findings are as follows: photosynthetic bacteria in high concentrations of body of water, a high amount of nitrogen and phosphorus assimilation. When the medium TN, TP concentrations were 314.04mg / L, 402.73mg / L, six days later put in photosynthetic bacteria the medium final residual nitrogen and phosphorus content were 245.23mg / L and 382.05mg / L, its corresponding the amount of nitrogen and phosphorus assimilation up to 68.81mg / L, 20.68mg / L; photosynthetic bacteria concentration in water bodies of the highest rate of nitrogen and phosphorus assimilation. When cultured in TN, TP concentrations were 1lmg / L and 22.71mg / L, two days after the vote bacteria, it is the medium of nitrogen and phosphorus assimilation rate were 65.23% and 10.22%, corresponding to the amount of assimilation can achieve 7.39mg / L and 2.32mg / L; photosynthetic bacteria in low concentrations of water bodies, reduced the efficiency of nitrogen and phosphorus assimilation, and assimilation also declined. When the medium in TN concentration between 3.5-6.5mg / L, residual vote bacteria TN concentration can be reduced to 2.6-2.8mg / L. Medium TP concentration in the 4-10mg / L, the photosynthetic bacteria Phosphorus assimilation amount is basically the same, about 0.5mg / L. Promote the right amount of FeCl3 and MgSO4 · 7H20 growth of photosynthetic bacteria and phosphorus assimilation efficiency photosynthetic bacteria: FeCl3 concentration of 0.015g / L, total nitrogen assimilation rate of 26.75%, 16.51% higher than the control group, the total nitrogen assimilation 30.01mg / L compared with the control group improved. When MgSO4 · 7H20 5mg / L, TN, TP assimilation highest rate up to 22.39% and 6.66%, 5.38% and 4.65%, compared with the control group; different concentrations of gibberellin can significantly improve photosynthetic bacteria TN assimilation efficiency, gibberellin concentration of 0.5mg / L of total nitrogen assimilation rate of 23.92%, 9.04% higher than the control group; R. palustris fecal red Pseudomonas photosynthetic bacteria bacteria mixed ratio of 1:0.25 when its total nitrogen assimilation rate the highest, 81.84%, 19.89% increase compared to the control group of R. palustris assimilation rate. By natural water body cast sprinkle photosynthetic bacteria, its analysis found that photosynthetic bacteria can effectively reduce the concentration of natural waters, NH4-N, SOP and TN reached 105 bacteria / mL concentrations in the water column, especially the assimilation of SOP strongest assimilation rate of 89.94%. Through single factor and orthogonal design experimental studies show that KH2PO4 of nitrogen and phosphorus in the medium assimilation efficiency is the most significant factor affecting photosynthetic bacteria. R. palustris under the premise of ensuring the fermentation of biomass, medium optimization formulations for: of NaCl 2.0g of NH4Cl 0.05g yeast extract. Og MgSO4 · 7H2O 0.2g CH3COONa · 3H2O 3 Og NaHCO3 2.Og KH 2 PO 4 1.40g H2O 1000mL. The medium photosynthetic bacteria can significantly improve the conversion efficiency and reduce the residual nitrogen and phosphorus content in the medium to medium nitrogen and phosphorus.

Related Dissertations

  1. Temporal and Spatial Variation of Methane Emission from Urban Lake and Its Relationship with the Hydrology-water Quality,X524
  2. The Changes of Microbial Community Along the Different Trophic Gradient of Seawater in Zhanjiang Bay,Q938.8
  3. Study on the System of Continous Process for Hydrogen Production by Photosynthetic Bacteria,TQ116.2
  4. Responses of Alocasia macrorrhiza to Different Water Stresses and Pollutants Exposures,X52
  5. Study on the Influential Environmental Factors for the Recruitment of Cyanobacteria in the Sediment of Shanzi Reservoir,X524
  6. Pollution and Management of Reservoir for Drinking Water Supply in Zhanjiang,X524
  7. Disturbance on Growth of Microcystis aeruginosa,X173
  8. Decontaminating the role of landscape water,X173
  9. Qingduizi Bay seasonal variations of nutrients and a variety of Eutrophication Assessment Methods,X55
  10. Variation of Bacteria Community Stuctures in Eutrophic Water Body During Water Bloom,X524
  11. Research and Development of Surface Water Quality Prediction Evaluation System-Lakes and Reservoirs Water Quality Prediction Evaluation Module Based on VC++,X824
  12. Based on Coupling Model ELCOM-CAEDYM nutrient regulation of Dianshanhu,X832
  13. Urban landscape water purification experiments,X52
  14. Study on Influence of Exo-phosphotase to Water Eutrophication Course,X524
  15. Study on the Monitoring and Evaluation of Nasi Lake Water Quality Based on Remote Sensing,X87
  16. The Biological Chain Study of Algae Control in the Baiyangdian Lake,X52
  17. Remote Sensing Invervsion of Water Quality Parameters and Trohpic State Assessment in Poyang Lake,TP79
  18. Studies on Removal Efficiency of Nitrogen and Phosphorus of Eutrophic Seawater with "Steel Slag-Gracilaria Lemaneiformis" System,S917.3
  19. The Influencing Study of Environmental Factors on Freshwater Algae Growth in Yellow River,X173
  20. Studies on the Distribution of Organic Carbon, Nitrogen, Phosphorous and Their Correlation in Chaohu Wetland Sediments,X524
  21. Study on Treatment Techology of Ecological Rehabilitation for Cixi Urban River,X522

CLC: > Environmental science, safety science > The basic theory for the Environment and Science > Environmental Biology > Environmental Microbiology
© 2012 www.DissertationTopic.Net  Mobile