Dissertation > Excellent graduate degree dissertation topics show

Study on the Liquid Culture of Feather Meal by Mixed Strains and the Degradation Rate

Author: GaoSiJia
Tutor: YangDeJi
School: Nanjing Agricultural College
Course: Clinical Veterinary Medicine
Keywords: keratin degrading microorganisms optimization fermentation products in vitro digestibility
CLC: S879.9
Type: Master's thesis
Year: 2013
Downloads: 12
Quote: 0
Read: Download Dissertation

Abstract


Research shows that the crude protein content of keratin waste is more than80%and the amino acid content is more than70%, so the keratin waste has been recognised as a resource with high nutritional value. Although there are rich and huge quantity feather resources in China, the utilization of keratin waste is far lower than that in developed country. There are5processing methods of keratin waste such as chemical hydrolysis, extruding, enzymic hydrolysis and microbiological method. In recent years, most researches concentrated in utilizing keratin waste with microbiological method. However, the study on utilizing keratin waste with microbiological method was in the laboratory. It was the first time to scale up test for fermentation process on the basis of laboratory in our laboratory. The main results are as follows:1. The keratin-degrading bacterias were diluted into different multiple before fermentation, and then the treated keratin-degrading bacterias were inoculated in fermentation medium for fermentation. Finally, the dilution multiple and the optimal concentration were obtained by comparing the weight loss of feather meal under the conditions of different keratin concentration. The dilution multiple was8times and the the optimal concentration was2.9x108CFU/mL and4.4x108CFU/mL.2. In order to industrialize the utilization of waste feather by microbiological method, the scale-up of fermentation from shaking flask to5L ferm enter for the keratin-degrading bacterias based on the study of the best condition for fermentation in the laboratory. Finally, the results showed that he best condition for fermentation as follows:the initial PH value, the culture temperature, the air displacement, the stirring speed, the additive amount of feather meal and the fermentation time were7.4～7.6,37℃,3.5L/min,250r/min,210g and72h.3. A two-step enzymatic method of pepsin-pancreatin and a two-step method of stomach-intestine were used to evaluate the digestibility of fermentation products for swine, chicken and crucian. The results showed that, the digestibility of fermentation products of swine and chicken were higher than the digestibility of fermentation products of crucian. So it was concluded that the feather meal was more suitable for livestock feed.

Related Dissertations

  1. Development of the Platform for Compressor Optimization Design and Aerodynamic Optimization Design in the Transonic Compressor,TH45
  2. Investigation of Turbine S2 Stream Surface Direct Problem Aerodynamic Optimization Design,V235.11
  3. Reseach on Optimal Control of Elevator Group Based upon Ant Colony Algorithm,TU857
  4. Research on High Efficiency Interior Permanent Magnet Synchronous Motor,TM341
  5. Application of Interior-Point Theory for Reactive Power Optimization in Large Power Systems,TM714.3
  6. The Basic Research of Axial Flux Inductor Type High Temperature Superconducting Motor,TM37
  7. The Optimization of AVS Video Decoder on the PC Platform and Improvement of Field Decoding,TN919.81
  8. Research on Stability of Hierarchical Sattellite Network,TN927.23
  9. Query Processing and Optimization in Massive Multi-Database Integration,TP311.13
  10. Research on Feature Extraction and Classification of Tongue Shape and Tooth-Marked Tongue in TCM Tongue Diagnosis,TP391.41
  11. Studies on Fermentation Optimization, Purification and Enzyme Characteristics of Lipase from Aspergillus Oryzae FS-1,TQ925.6
  12. Large the Hongshan iron ore mine personnel tracking positioning system optimization study,TN929.5
  13. Computing Minimum Distance between Curves/Surfaces Based on PSO Algorithm,O182
  14. Analysis of Nutritional Compositions and Quality of Shishen (Eremurus Chinensis Fedtsch.),S647
  15. 1 - deoxynojirimycin synthetic route design and process optimization,TQ463.5
  16. Optimization of Fermentation Conditions, Purification, Cloning and Expression of a Cold-active Lipase from Pseudomonas Sp.RT-1,TQ925
  17. Breeding of Fungal α-amylase High-producing Strain by Genome Shuffling,TQ925
  18. Hot air drying characteristics of lettuce osmotic dehydration mass transfer kinetics and permeability,TS255.52
  19. Study on Application of Red Yeast Rice in Fermented Sausage,TS251.65
  20. Domestication of Acidithiobacillus Ferroxidans and Its Application to Bio-desulfuration of Coal,X701.3
  21. Active Power Filter and Its Application in Distribution Network,TN713.8

CLC: > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > Comprehensive utilization of livestock and poultry products > By - products and Its Utilization > Other
© 2012 www.DissertationTopic.Net  Mobile